Patent Publication Number: US-2021168393-A1

Title: Reproduction device reproduction method, and recording medium

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This is a continuation of U.S. application Ser. No. 16/534,757, filed Aug. 7, 2019, which is a continuation of U.S. application Ser. No. 15/913,254, filed on Mar. 6, 2018, which is a continuation of U.S. application Ser. No. 14/892,056, filed on Nov. 18, 2015, now U.S. Pat. No. 9,986,253, which is a U.S. National Stage application of International Application No. PCT/JP2014/065054, filed on Jun. 6, 2014, which claims priority to Japanese Application No. 2013-129994, filed on Jun. 20, 2013, the entire contents of each of which are hereby incorporated by reference herein in their entirety. 
    
    
     TECHNICAL FIELD 
     The present technology relates to a reproduction device, a reproduction method, and a recording medium and, in particular, relates to a reproduction device, a reproduction method, and a recording medium that enable content having a wide dynamic range of brightness to be displayed with an appropriate brightness. 
     BACKGROUND ART 
     There is a Blu-ray (registered trademark) Disc (hereinafter, as appropriate, referred to as a BD) serving as a recording medium of content such as a movie. Hitherto, in authoring a video recorded on a BD, a dynamic range of the master video is compressed on the premise that the video is viewed on a monitor with a standard brightness (100 nit=100 cd/m 2 ). 
     The video that is to be the master is taken by a high-quality camera and includes a dynamic range that is equivalent to or greater than a dynamic range that can be displayed on a monitor with the standard brightness. It goes without saying that the dynamic range of the master video is deteriorated by being compressed. 
     CITATION LIST 
     Patent Literature 
     Patent Literature 1: JP 2009-58692A 
     Patent Literature 2: JP 2009-89209A 
     SUMMARY OF INVENTION 
     Technical Problem 
     Owing to technological progresses m displays such as organic electro luminescence (EL) displays and liquid crystal displays (LCDs) monitors with brightness, such as 500 nit and 1000 nit, that is brighter than standard monitors are commercially available. Content that can take advantage of the performance of such monitors having such a wide dynamic range is in demand. 
     The present technology has been made in view of the above situation and enables content having a wide dynamic range of brightness to be displayed with an appropriate brightness. 
     Solution to Problem 
     A reproduction device according to an aspect of the present technology includes: a readout unit configured to read out, from a recording medium that has recorded coded data of an extended video that is a video having a second brightness range that is wider than a first brightness range, brightness characteristic information that represents a brightness characteristic of the extended video, and brightness conversion definition information used when performing a brightness conversion of the extended video to a standard video that is a video having the first brightness range, the coded data, the brightness characteristic information, and the brightness conversion definition information; a decoding unit configured to decode the coded data; a conversion unit configured to convert the extended video obtained by decoding the coded data to the standard video on a basis of the brightness conversion definition information; and a communication unit configured to acquire, from a display device that is to be an output destination of a video, performance information  30  that is information representing a performance of the display device, to output data of the extended video after adding frame information including the brightness characteristic information to frame data when the performance information includes information representing a display performance of the extended video, and to output data of the standard video when the performance information includes no information representing the display performance of the extended video. 
     The information representing the display performance of the extended video can include a first flag that represents whether to output the extended video without adjusting a brightness of the extended video or to output the extended video after adjusting the brightness of the extended video. In this case the communication unit can change the extended video to be output according to a value of the first flag. 
     When the extended video on which an adjustment of the brightness has been performed is output, the communication unit can output the data of the extended video in which the frame information including the brightness characteristic information representing the brightness characteristic after the adjustment is added to the frame data. 
     The frame information can include a second flag that represents whether the extended video to be output is a video on which no adjustment of the brightness has been performed or is a video on which an adjustment of the brightness has been performed. 
     The communication unit can perform communication with the display device in accordance with an HDMI (registered trademark) standard to acquire an EDID serving as the performance information from the display device, and output the data of the extended video in which an InfoFrame serving as the frame information is added to the frame data. 
     The coded data can be coded data of an HEVC, and the brightness characteristic information and the brightness conversion definition information can be each an SEI of an HEVC stream. 
     According to an aspect of the present technology, from a recording medium that has recorded coded data of an extended video that is a video having a second brightness range that is wider than a first brightness range, brightness characteristic information that represents a brightness characteristic of the extended video, and brightness conversion definition information used when performing a brightness conversion of the extended video to a standard video that is a video having the first brightness range, the coded data, the brightness characteristic information, and the brightness conversion definition information are read out. The coded data is decoded. The extended video obtained by decoding the coded data is converted to the standard video on a basis of the brightness conversion definition information. From a display device that is to be an output destination of a video, performance information that is information representing a performance of the display device is acquired. Data of the extended video is output after adding frame information including the brightness characteristic information to frame data when the performance information includes information representing a display performance of the extended video. Data of the standard video is output when the performance information includes no information representing the display performance of the extended video. 
     According to another aspect of the present technology, a readout unit configured to read out, from a recording medium that has recorded coded data of a standard video that is obtained by performing a brightness conversion of an extended video that is a video having a second brightness range that is wider than a first brightness range, the standard video being a video having the first brightness range, brightness characteristic information that represents a brightness characteristic of the extended video, and brightness conversion definition information used when performing the brightness conversion of the standard video to the extended video, the coded data, the brightness characteristic information, and the brightness conversion definition information; a decoding unit configured to decode the coded data; a conversion unit configured to convert the standard video obtained by decoding the coded data to the extended video on a basis of the brightness conversion definition information; and a communication unit configured to acquire, from a display device that is to be an output destination of a video, performance information that is information representing a performance of the display device, to output data of the extended video after adding frame information including the brightness characteristic information to frame data when the performance information includes information representing a display performance of the extended video, and to output data of the standard video when the performance information includes no information representing the display performance of the extended video are included. 
     The information representing the display performance of the extended video can include a first flag that represents whether to output the extended video without adjusting a brightness of the extended video or to output the extended video after adjusting the brightness of the extended video. In this case, the communication unit can change the extended video to be output according to a value of the first flag. 
     When the extended video on which an adjustment of the brightness has been performed is output, the communication unit can output the data of the extended video in which frame information including the brightness characteristic information representing the brightness characteristic after the adjustment is added to the frame data. 
     The frame information can include a second flag that represents whether the extended video to be output is a video on which no adjustment of the brightness has been performed or is a video on which an adjustment of the brightness has been performed. 
     The communication unit can perform communication with the display device in accordance with an HDMI standard to acquire an EDID serving as the performance information from the display device, and output the data of the extended video in which an InfoFrame serving as the frame information is added to the frame data. 
     The coded data can be coded data of an HEVC, and the brightness characteristic information and the brightness conversion definition information can be each an SEI of an HEVC stream. 
     According to another aspect of the present technology, from a recording medium that has recorded coded data of a standard video that is obtained by performing a brightness conversion of an extended video that is a video having a second brightness range that is wider than a first brightness range, the standard video being a video having the first brightness range, brightness characteristic information that represents a brightness characteristic of the extended video, and brightness conversion definition information used when performing the brightness conversion of the standard video to the extended video, the coded data, the brightness characteristic information, and the brightness conversion definition information are read out. The coded data is decoded. The standard video obtained by decoding the coded data is converted to the extended video on a basis of the brightness conversion definition information. From a display device that is to be an output destination of a video, performance information that is information representing a performance of the display device is acquired. Data of the extended video is output after adding frame information including the brightness characteristic information to frame data when the performance information includes information representing a display performance of the extended video. Data of the standard video is output when the performance information includes no information representing the display performance of the extended video. 
     Advantageous Effects of Invention 
     According to the present technology, content having a wide dynamic range of brightness can be displayed with an appropriate brightness. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
         FIG. 1  is a diagram illustrating an exemplary configuration of a recording/reproduction system according to an embodiment of the present technology, 
         FIG. 2  is a diagram illustrating an example of signal processing in mode-i. 
         FIG. 3  is a diagram illustrating a flow of a signal processed in mode-i. 
         FIG. 4  is a diagram illustrating an example of signal processing in mode-ii. 
         FIG. 5  is a diagram illustrating a flow of a signal processed in mode-ii. 
         FIG. 6  is a diagram illustrating a configuration of an access unit of an HEVC. 
         FIG. 7  is a diagram illustrating syntax of Tone mapping information. 
         FIG. 8  is a diagram illustrating an example of information used as tone mapping definition information and HDR information. 
         FIG. 9  is a diagram illustrating an example of a tone curve drawn with the tone mapping information of tone_map_model_id=0. 
         FIG. 10  is a diagram illustrating an example of a step function drawn with the tone mapping information of tone_map_model_id=2. 
         FIG. 11  is a diagram illustrating an example of a polygonal line function drawn with the tone mapping information of tone_map_model_id=3. 
         FIG. 12  is a diagram illustrating an example of each pieces of information  20  included in the HDR information. 
         FIG. 13  is a diagram illustrating an example of a management structure of an AV stream in BD-ROM format. 
         FIG. 14  is a diagram illustrating a structures of Main Path and Sub Paths. 
         FIG. 15  is a diagram illustrating an example of a management structure of a file. 
         FIG. 16  is a diagram illustrating syntax of a PlayList file. 
         FIG. 17  is a diagram illustrating syntax of a Clip Information file. 
         FIG. 18  is a diagram illustrating syntax of ProgramInfo ( ) in  FIG. 17 . 
         FIG. 19  is a diagram illustrating syntax of StreamCodingInfo in  FIG. 18 . 
         FIG. 20  is a block diagram illustrating an exemplary configuration of a recording device. 
         FIG. 21  is a block diagram illustrating an exemplary configuration of a coding processing unit in  FIG. 20 . 
         FIG. 22  is a diagram illustrating an example of signal processing performed by an HDR-STD conversion unit. 
         FIG. 23  is a diagram illustrating an example of tone mapping. 
         FIG. 24  is a block diagram illustrating an exemplary configuration of a reproduction device. 
         FIG. 25  is a block diagram illustrating an exemplary configuration of a decoding processing unit in  FIG. 24 , 
         FIG. 26  is a block diagram illustrating an exemplary configuration of a display device. 
         FIG. 27  is a flowchart illustrating recording processing of the recording device. 
         FIG. 28  is a flowchart illustrating coding processing in mode-i performed in step S 2  in  FIG. 27 . 
         FIG. 29  is a flowchart illustrating coding processing in mode-ii performed in step S 3  in  FIG. 27 . 
         FIG. 30  is a flowchart illustrating Data Base information generation processing performed in step S 4  in  FIG. 27 . 
         FIG. 31  is a flowchart illustrating reproduction processing of the reproduction device. 
         FIG. 32  is a flowchart illustrating the decoding processing in mode-I performed in step S 44  in  FIG. 31 . 
         FIG. 33  is a flowchart illustrating the decoding processing in mode-ii  25  performed in step S 45  in  FIG. 31 . 
         FIG. 34  is a flowchart illustrating display processing of the display device. 
         FIG. 35  is a diagram illustrating an example of syntax of AppInfoPlayList ( ) included in the PlayList file in  FIG. 16 , 
         FIG. 36  is a diagram illustrating syntax of PlayList ( ) included in the PlayList file in  FIG. 16 , 
         FIG. 37  is a diagram illustrating syntax of PlayItem ( ) in  FIG. 36 . 
         FIG. 38  is a diagram illustrating syntax of STN_table ( ) in  FIG. 37 . 
         FIG. 39  is a diagram illustrating syntax of stream_attributes ( ) in  FIG. 38 . 
         FIG. 40  is a diagram illustrating an example of an allocation of PSR. 
         FIG. 41  is a diagram illustrating an example of signal processing in mode-I in a case in which an adjustment of a brightness of an HDR video is performed on a reproduction device side. 
         FIG. 42  is a diagram illustrating an example of signal processing in mode-ii in a case in which an adjustment of the brightness of the HDR video is performed on a reproduction device side. 
         FIG. 43  is a block diagram illustrating an exemplary configuration of an HOR video output unit in  FIG. 25 . 
         FIG. 44  is a flowchart illustrating the decoding processing in mode-I performed in step S 44  in  FIG. 31 . 
         FIG. 45  is a flowchart illustrating the decoding processing in mode-ii performed in step S 45  in  FIG. 31 . 
         FIG. 46  is a flowchart illustrating the display processing of the display device. 
         FIG. 47  is a diagram illustrating an example of a recognition on the basis of information transmitted and received through HDMI. 
         FIG. 48  is a diagram illustrating another example of the recognition on the basis of the information transmitted and received through the HDMI. 
         FIG. 49  is a diagram illustrating an example of HDR EDID. 
         FIG. 50  is a diagram illustrating an example of HDR InfoFrame. 
         FIG. 51  is a flowchart illustrating setting processing of the HDR EDID of the display device. 
         FIG. 52  is a flowchart illustrating the reproduction processing of the reproduction device. 
         FIG. 53  is a flowchart illustrating HDR/raw output processing performed in step S 227  in  FIG. 52 . 
         FIG. 54  is a flowchart illustrating HDR/cooked output processing performed in step S 228  in  FIG. 52 . 
         FIG. 55  is a flowchart illustrating STD output processing performed in step S 229  in  FIG. 52 . 
         FIG. 56  is a flowchart illustrating the display processing of the display device. 
         FIG. 57  is a block diagram illustrating an exemplary configuration of a computer. 
     
    
    
     DESCRIPTION OF EMBODIMENTS 
     Hereinafter, a mode to implement the present technology will be described. The description will be given in the following order. 
     1. Recording/Reproduction System 
     2. HEVC 
     3. BD Format 
     4. Configuration of Each Device 
     5. Operation of Each Device 
     6. Modifications 
     7. Exemplary Case m Which Brightness Is Adjusted on Reproduction Device Side 
     8. Exemplary Application to HDMI 
     9. Other Modifications 
     &lt;1. Recording/Reproduction System&gt; 
       FIG. 1  is a diagram illustrating an exemplary configuration of a recording/reproduction system according to an embodiment of the present technology. 
     The recording/reproduction system in  FIG. 1  includes a recording device  1 , a reproduction device  2 , and a display device  3 . The reproduction device  2  and the 30 display device  3  are connected to each other through a high-definition multimedia interface (HDMI) cable  4 . The reproduction device  2  and the display device  3  may be connected to each other through a cable of another standard or may be connected via radio communication. 
     The recording device  1  records content, and the reproduction device  2  reproduces the content. An optical disc  11  is used to provide the content from the recording device  1  to the reproduction device  2 . The optical disc  11  is a disc on which the content is recorded in a Blu-ray (registered trademark) Disc Read-Only (BD-ROM) Format, for example. 
     The content may be recorded on the optical disc  11  in another format such as a BD-R or BD-RE format. Furthermore, the content may be provided from the recording device  1  to the reproduction device  2  by using a removable media other than an optical disc, such as a memory card mounted with a flash memory. 
     When the optical disc  11  is a BD-ROM disc, the recording device  1  is a device used by the author of the content, for example. Hereinafter, while a description will be appropriately given assuming that the optical disc  11  on which the content has been recorded with the recording device  1  is provided to the reproduction device  2 , in actuality, an optical disc  11  that is one of the optical discs that are copies of a master disc on which the content is recorded with the recording device  1  is provided to the reproduction device  2 . 
     A high dynamic range (HDR) video that is a video having a dynamic range that is equivalent to or greater than a dynamic range (a brightness range) that can be displayed on a monitor having a standard brightness is input to the recording device  1 . The standard brightness is 100 cd/m 2  (=100 nit). 
     The recording device  1  records, on the optical disc  11 , the input master HDR video as it is, that is, as a video having a dynamic range that is equivalent to or 30 greater than the dynamic range that can be displayed on a monitor with a standard brightness. In such a case, information representing the brightness characteristic of the master HDR video and, also, information used when converting an HDR video to an STD video are recorded on the optical disc  11 . 
     A standard video (the STD video) is a video having a dynamic range that can be displayed on a monitor having a standard brightness. When the dynamic range of the STD video is 0-100%, the dynamic range of the HDR video is expressed as a range of 0% to 101% or more, such as 0-500% or 0-1000%. 
     Furthermore, after converting the input master HDR video to an STD video, that is, after converting the input master HDR video to a video that has a dynamic range that is capable of being displayed on a monitor having a standard brightness, the recording device  1  records the video on the optical disc  11 . In such a case, information representing the brightness characteristic of the master HDR video and, also, information used when converting an STD video to an HDR video are recorded on the optical disc  11 . 
     The HDR video that the recording device  1  records or the STD video that is obtained by converting the HDR video are videos having a so-called 4K resolution in which the horizontal/vertical resolution is 4096/2160 pixels, 3840/2160 pixels, or the like. For example, High Efficiency Video Coding (HEVC) is used in coding the video data with the recording device  1 . 
     Information representing the brightness characteristic of the master HDR video and information used when converting an HDR video to an STD video or when converting an STD video to an HDR video are inserted into the coded data of the HEVC as supplemental enhancement information (SEI). An HEVC stream, which is coded data of HEVC in which the SE is inserted, is recorded on the optical disc  11  in BD format. 
     The reproduction device  2  communicates with the display device  3  through the HDMI cable  4  and acquires information related to the display performance of the display device  3 . The reproduction device  2  specifies whether the display device  3  is a device having an HDR monitor that is a monitor that is capable of displaying an HDR video or whether the display device  3  is a device having an STD monitor that is a monitor that can only display an STD video. 
     Furthermore, the reproduction device  2  drives a drive and reads out and decodes the HEVC stream recorded on the optical disc  11 . 
     For example, when the video data obtained through decoding is data of an HDR video and when the display device  3  includes an HDR monitor, the reproduction device  2  outputs the data of the HDR video obtained through decoding the HEVC stream to the display device  3 . In such a case, the reproduction device  2  outputs, together with the data of the HDR video, data representing the brightness characteristic of the master HDR video to the display device  3 . 
     On the other hand, when the video data obtained through decoding is data of an HDR video and when the display device  3  includes an STD monitor, the reproduction device  2  converts the HDR video, which has been obtained by decoding the HEVC stream, to an STD video and outputs the data of the STD video. The conversion of the HDR video to an STD video is performed by using information that is recorded on the optical disc  11  and that is used when converting an HDR video to an STD video. 
     When the video data obtained through decoding is data of an STD video and when the display device  3  includes an HDR monitor, the reproduction device  2  converts the STD video, which has been obtained by decoding the HEVC stream, to an HDR video and outputs the data of the HDR video to the display device  3 . The conversion of the STD video to an HDR video is performed by using information that is recorded on the optical disc  11  and that is used when converting an STD video to an HDR video. In such a case, the reproduction device  2  outputs, together with the HDR video, data representing the brightness characteristic of the master HDR video to the display device  3 . 
     On the other hand, when the video data obtained through decoding is data of an STD video and when the display device  3  includes an STD monitor, the reproduction device  2  outputs the data of the STD video obtained through decoding the HEVC stream to the display device  3 . 
     The display device  3  receives video data transmitted from the reproduction device  2  and displays an image of the content on the monitor. Audio data of the content is also transmitted from the reproduction device  2 . On the basis of the audio data transmitted from the reproduction device  2 , the display device  3  outputs audio of the content from a loudspeaker. 
     For example, when information representing the brightness characteristic of the master HDR video is transmitted together with the video data, the display device  3  recognizes that the video data transmitted from the reproduction device  2  is data of an HDR video. As described above, information representing the brightness characteristic of the master HDR video is transmitted together with the data of the HDR video to the display device  3  including an HDR monitor. 
     In such a case, the display device  3  displays the image of the HDR video in accordance with the characteristics specified by the information representing the brightness characteristic of the master HDR video. In other words, when the monitor included in the display device  3  is a monitor having a dynamic range of 0-500% and when the dynamic range of the HDR video is designated to have a predetermined characteristic of 0-500% from the information representing the brightness characteristic of the master HDR video, then in accordance with the predetermined characteristic, the display device  3  displays an image while adjusting the brightness in the range of 0-500%. 
     By enabling the brightness characteristic of the master HDR video to be designated, the author of the content is capable of displaying an image at an intended brightness. 
     Typically, a display device such as a TV recognizes the video input from the outside as a video having a dynamic range of 0-100%. Furthermore, when the monitor of the display device has a dynamic range that is wider than the input video, the display device displays the image while disadvantageously extending the brightness in accordance with the characteristics of the monitor. By designating the brightness characteristic and by adjusting the brightness of the HDR video according to the designated characteristic, an adjustment of the brightness unintended by the author can be prevented from being performed on the display device side. 
     Furthermore, a reproduction device that outputs a video on a display device such as a TV typically outputs the video after converting the brightness in accordance with the characteristics of the transmission line. The display device that has received the video will display the image after converting the brightness of the received video in accordance with the characteristics of the monitor. By not converting the brightness in the reproduction device  2  and by having the HDR video from the reproduction device  2  be output as it is on the display device  3 , the number of brightness conversions can be reduced and an image with a brightness that is more close to the master can be displayed on the display device  3 . 
     Meanwhile, when the video data transmitted from the reproduction device  2  is data of an STD video, the display device  3  displays an image of the STD video. An STD video being transmitted from the reproduction device  2  indicates that the display device  3  is a device including an STD monitor. 
     Hereinafter, as appropriate, a mode in which the master HDR video is recorded on the optical disc  11  as it is will be referred to as mode-i in mode-i, information representing the brightness characteristic of the master HDR video and information used when converting an HDR video to an STD video are recorded on the optical disc  11 . 
     Furthermore, a mode in which the master HDR video is recorded on the optical disc  11  after being converted to an STD video will be referred to as mode-ii. In mode-ii, information representing the brightness characteristic of the master HDR video and information used when converting an STD video to an HDR video are recorded on the optical disc  11 . 
     [Signal Processing in Mode-i] 
       FIG. 2  is a diagram illustrating an example of signal processing in mode-i. 
     The processing on the left side illustrated by surrounding a solid line L illustrates coding processing performed in the recording device  1 , and the processing on the right side illustrated by surrounding a solid line L 2  illustrates decoding processing performed in the reproduction device  2 . 
     When a master HDR video is input, the recording device  1  detects the brightness of the master HDR video and, as illustrated at the end of arrow #1, HDR information that is information representing the brightness characteristic of the master HDR video is generated. Furthermore, as illustrated at the end of arrow #2, the recording device  1  performs coding on the master HDR video by HEVC. 
     As illustrated at the end of arrow #3, the recording device  1  converts the master HDR video to an STD video. An image of the STD video obtained by the conversion is displayed on a monitor (not shown). The conversion of the HDR video to the STD video is carried out, as appropriate, while the author visually checks the image of the STD video after the conversion and while adjusting the conversion parameter. 
     As illustrated at the end of arrow #4, on the basis of the adjustment performed by the author, the recording device  1  generates tone mapping definition information for HDR-STD conversion that is used when converting an HDR video to an STD video. 
     The tone mapping definition information is information that defines the correlation between each pixel representing the brightness of the dynamic range of 0-400% or the like that is a dynamic range that is wider than the standard dynamic range and each pixel representing the brightness of the dynamic range of 0-10% that is the standard dynamic range. 
     As illustrated at the end of arrow #5, the recording device  1  generates an HEVC stream by inserting the HDR information and the tone mapping definition information as SEI into the coded data of the HEVC. The recording device  1  records the generated HEVC stream on the optical disc  11  in BD format and, as illustrated by arrow #11, provides the HEVC stream to the reproduction device  2 . 
     As described above, information representing the brightness characteristic of the master HDR video and information used when converting an HDR video to an STD video are provided to the reproduction device  2  in the form of insertion into the stream by using the SE of the HEVC. 
     The reproduction device  2  reads out the HEVC stream from the optical disc  11  and, as illustrated at the ends of arrows #21 and #22, extracts the HDR information and the tone mapping definition information from the SEI of the HEVC stream. 
     Furthermore, as illustrated at the end of arrow #23, the reproduction device  2  decodes the coded data of the HEVC. As illustrated at the end of arrow #24, when the display device  3  includes an HDR monitor, the reproduction device  2  adds the HDR information to the data of the HDR video obtained by decoding the coded data and, as illustrated at the end of arrow #25, outputs the data to the display device  3 . 
     On the other hand, as illustrated at the end of arrow #26, when the display device  3  includes an STD monitor, the reproduction device  2  converts the HDR video, which has been obtained by decoding the coded data, to an STD video by 5 using the tone mapping definition information for HDR-STD conversion extracted from the HEVC stream. As illustrated at the end of arrow #27, the reproduction device  2  outputs the data of the STD video, which has been obtained by the conversion, to the display device  3 . 
     As described above, the HDR video data obtained by decoding the coded data of the HEVC is, together with the HDR information, output to the display device  3  including an HDR monitor. Furthermore, the HDR video data obtained by decoding the coded data of the HEVC is, after being converted to an STD video, output to the display device  3  including an STD monitor. 
       FIG. 3  is a diagram illustrating a flow of a process from when the master HDR video is input to the recording device  1  until the video data is output from the production device  2 . 
     As illustrated at the end of hollow arrow #51, the master HDR video is provided to the reproduction device  2  together with the HDR information and the tone mapping definition information for HDR-STD conversion that are generated in the recording device  1  on the basis of the master HDR video. Information representing that the dynamic range is extended to a range of 400%, for example, is included in the HDR information. 
     When the display device  3  includes an HDR monitor, as illustrated at the ends of arrows #52 and #53, in the reproduction device  2 , the HDR information is added to the HDR video data that has been obtained by decoding the coded data of the HEVC. Furthermore, as illustrated at the end of arrow #54, the HDR video data to which the HDR information has been added is output to the display device  3 . 
     On the other hand, when the display device  3  includes an STD monitor, as illustrated at the ends of arrows #55 and #56, in the reproduction device  2 , the HDR video that has been obtained by decoding the coded data of the HEVC is converted to an STD video by using the tone mapping definition information for HDR-STD conversion. Furthermore, as illustrated at the end of arrow #57, the STD video data obtained by the conversion is output to the display device  3 . In  FIG. 3 , the waveform amplitude representing the HDR video and the waveform amplitude representing the STD video each represents a dynamic range. 
     As described above, in mode-i, the master HDR video is recorded on the optical disc  11  as it is. Furthermore, switching between outputting the HDR video, which has been obtained by decoding the coded data, as it is after adding the HDR information, and outputting the HDR video after converting to an STD video can be performed according to the performance of the display device  3  serving as an output destination. 
     [Signal Processing in Mode-ii] 
       FIG. 4  is a diagram illustrating an example of signal processing in mode-ii. 
     When a master HDR video is input, the recording device  1  detects the brightness of the master HDR video and, as illustrated at the end of arrow #71, HDR information is generated. 
     As illustrated at the end of the arrow #72, the recording device  1  converts the master HDR video to an STD video. An image of the STD video obtained by the conversion is displayed on a monitor (not shown). 
     As illustrated at the end of arrow #73, on the basis of the adjustment performed by the author, the recording device  1  generates tone mapping definition information for STD-HDR conversion that is used when converting an STD video to an HDR video. 
     Furthermore, as illustrated at the end of the arrow #74, the recording device  1  performs coding on the STD video, which has been obtained by converting the master HDR video, by HEVC. 
     As illustrated at the end of arrow #75, the recording device  1  generates an HEVC stream by inserting the HDR information and the tone mapping definition information as SEI into the coded data of the HEVC. The recording device  1  records the generated HEVC stream on the optical disc  11  in BD format and, as illustrated by arrow #91, provides the HEVC stream to the reproduction device  2 . 
     The reproduction device  2  reads out the HEVC stream from the optical disc and, as illustrated at the ends of arrows #101 and #102, extracts the HDR information and the tone mapping definition information from the SEI of the HEVC stream. 
     Furthermore, as illustrated at the end of arrow #103, the reproduction device  2  decodes the coded data of the HEVC. As illustrated at the end of arrow #104, when the display device  3  includes an STD monitor, the reproduction device  2  outputs the STD video data obtained by decoding the coded data to the display device  3 . 
     On the other hand, as illustrated at the end of arrow #105, when the display device  3  includes an HDR monitor, the reproduction device  2  converts the STD video, which has been obtained by decoding the coded data, to an HDR video by using the tone mapping definition information for STD-HDR conversion extracted from the HEVC stream. As illustrated at the end of arrow #106, the reproduction device  2  adds the HDR information to the data of the HDR video obtained by the conversion and, as illustrated at the end of arrow #107, outputs the data to the display device  3 . 
     As described above, the STD video data obtained by decoding the coded data of the HEVC is, after being converted to an HDR video, output to the display device  3  including an HDR monitor together with the HDR information. Furthermore, the STD video data obtained by decoding the coded data of the HEVC is output as it is to the display device  3  including an STD monitor. 
       FIG. 5  is a diagram illustrating a flow of a process from when the master HDR video is input to the recording device  1  until the video data is output from the reproduction device  2 . 
     As illustrated at the end of hollow arrow #121, after being converted to an STD video, the master HDR video is provided to the reproduction device  2  together with the HDR information and the tone mapping definition information for STD-HDR conversion that are generated in the recording device  1  on the basis of the master HDR video. 
     When the display device  3  includes an HDR monitor, as illustrated at the ends of arrows #122 and #123, in the reproduction device  2 , the STD video that has been obtained by decoding the coded data of the HEVC is converted to an HDR video by using the tone mapping definition information for STD-HDR conversion. Furthermore, as illustrated at the ends of arrows #124 and #125, the HDR information is added to the data of the HDR video obtained by the conversion of the STD video and, as illustrated at the end of arrow #126, the data is output to the display device  3 . 
     On the other side, when the display device  3  includes an STD monitor, as illustrated at the end of arrows #127, in the reproduction device  2 , the STD video data that has been obtained by decoding the coded data of the HEVC is output to the display device  3 . 
     As described above, in mode-ii, the master HDR video is converted to an STD video and is recorded on the optical disc  11 . Furthermore, switching between outputting the STD video, which has been obtained by decoding the coded data, after converting the STD video to an HDR video and adding HDR information, and outputting the STD video as it is performed according to the performance of the display device  3  serving as an output destination. 
     Detailed configurations and operations of such recording device  1  and reproduction device  2  will be described later. 
     &lt;2. HEVC&gt; 
     Herein, a description of the HEVC will be given. 
       FIG. 6  is a diagram illustrating a configuration of an access unit of the HEVC. 
     An HEVC stream is configured of an access unit that is a group of network abstraction layer (NAL) units. Video data of a single picture is included in a single access unit. 
     As illustrated in  FIG. 6 , a single access unit is configured of an access unit delimiter (AU delimiter), a video parameter set (VPS), a sequence parameter set (SPS), a picture parameter set (PPS), an SEI, a video coding layer (VCL), an end of sequence (EOS), and an end of stream (EOS). 
     The AU delimiter represents the head of the access unit. The VPS includes metadata representing the content of the bitstream. The SPS includes information, such as the picture size, the coding tree block (CTB) size, and the like that the HEVC decoder needs to refer to through the decoding processing of the sequence. The 30 PPS includes information that needs to be referred to in order for the HEVC decoder to execute the decoding processing of the picture. The VPS, the SPS, and the PPS are used as the header information. 
     The SEI is auxiliary information including information related to timing information and random access of each picture, and the like. The HDR information and the tone mapping definition information are included in Tone mapping information that is one of the SEIs. The VCL is data of a single picture. The end of sequence (EOS) represents the end position of the sequence and the end of stream (EOS) represents the end position of the stream. 
       FIG. 7  is a diagram illustrating syntax of the Tone mapping information. 
     The brightness and the color of the picture obtained by decoding are converted in accordance with the performance of the monitor serving as an output destination of the picture by using the Tone mapping information. Note that the line numbers and the colons (:) on the left side in  FIG. 7  are described for convenience of description and are not information included in the Tone mapping information. Main information included in the Tone mapping information will be described. 
     Tone_map_id on the second line is identification information of the Tone 20 mapping information. An object of the Tone mapping information is identified by the tone_map_id. 
     For example, an ID for mode-i and an ID for mode-ii are secured. When the recording mode is mode-i, an ID for mode-i is set in the tone_map_id of the Tone 25 mapping information that is inserted into the SEI of the coded data of the HDR video. Furthermore, when the recording mode is mode-ii, an ID for mode-ii is set in the tone_map_id of the Tone mapping information that is inserted into the SEI of the coded data of the STD video. In the optical disc  11 , either of the IDs among the ID for mode-i and the ID for mode-ii is set in the tone_map_id. 
     Tone_map_model_id on the eighth line represents a model of the tone map used to convert the coded data. 
     In the recording device  1 , a single Tone mapping information in which either one of 0, 2, and 3 is set as the value of the tone_map_model_id, and a single Tone mapping information in which 4 is set as the value of the tone_map_model_id are generated. 
     As illustrated in  FIG. 8 , the Tone mapping information in which either one of the values 0, 2, and 3 is set as the tone_map_model_id is used as the tone mapping definition information for HDR-STD conversion or for STD-HDR conversion. Furthermore, information included in the Tone mapping information in which 4 is set as the value of the tone_map_model_id is used as the HOR information. 
     Lines 9 to 11 in  FIG. 7  are a description relating to tone_map_model_id=0. When tone_map_model_id=0, min value and max_value are described. 
       FIG. 9  is a diagram illustrating an example of a tone curve drawn with the Tone mapping information of tone_map_model_id=0. 
     The axis of abscissas in  FIG. 9  represents coded_data (an R GB value before conversion) and the axis of ordinates represents target_data (an RGB value after conversion). When the tone curve in  FIG. 9  is used, as indicated by hollow arrow #151, the RGB value equivalent to or below coded_data D 1  is converted to an RGB value expressed by min-value. Furthermore, as indicated by hollow arrow #152, the RGB value equivalent to or above coded_data D 2  is converted to an RGB value expressed by max_value. 
     The tone mapping information of tone_map_model_id=0 is used as the tone mapping definition information for HOR-STD conversion. When the Tone 30 mapping information of tone_map_model_id=0 1s used, the brightness (the brightness expressed by RGB values) equivalent to or above max value and equivalent to or below min . . . value are lost; however, the load on the conversion processing becomes lighter. 
     Lines 15 to 17 in  FIG. 7  are a description relating to tone_map_model_id=2. Tone_map_model_id=2 draws a step function and the number of start_of_coded_interval[i] that is the same as the number of max_target_data is described. 
       FIG. 10  is a diagram illustrating an example of a step function drawn with the Tone mapping information of tone_map_model_id=2. 
     When the step function in  FIG. 10  is used, coded_data=5 is converted to target_data=3, for example. When start_of_coded_interval[i] is {1, 3, 4, 5, 5, 5, 7, 7 . . . }, a conversion table of the coded_data-target_data is expressed as {0, 1, 1, 2, 3, 5, 5 . . . }. 
     The tone mapping information of tone_map_model_id=2 is used as the tone mapping definition information for STD-HDR conversion or for HDR-STD conversion. Since the amount of data of the Tone mapping information of tone_map_model_id=2 is large, when creating the tone_map_model_id=2, convolution with the conversion table needs to be performed; however, the load on the conversion processing is light. 
     Lines 18 to 23 in  FIG. 7  are a description relating to tone_map_model_id=3. When tone_map_model_id 3, the coded_pivot_value[i] and target_pivot_value[i], the numbers of which are designated by num_pivots, that draw a polygonal line function are described. 
       FIG. 11  is a diagram illustrating an example of a polygonal line function drawn with the Tone mapping information of tone_map_model_id=3. 
     When the polygonal line function in  FIG. 11  is used, the coded_data D 11  is converted to target_data=D 11 ′, and the coded data D 12  is converted to target_data D 12 ′, for example. The tone mapping information of tone_map_model_id=3 is used as the tone mapping definition information for STD-HDR conversion or for HDR-STD conversion. 
     As described above, the Tone mapping information in which either one of the values 0, 2, and 3 is set as the tone_map_model_id is used as the tone mapping definition information for STD-HDR conversion or for HDR-STD conversion and is transmitted to the reproduction device  2  from the recording device  1 . 
     Lines 24 to 39 in  FIG. 7  are a description relating to tone_map_model_id=4. Among the information related to tone_map_model_id 4, ref screen luminance_white, extended_range_white_level, nominal_black_level_code_value, nominal_white_level_code_value, and extended_white_level_code_value are parameters configuring the HDR information. 
       FIG. 12  is a diagram illustrating an example of each pieces of information included in the HDR information. 
     The axis of abscissas in  FIG. 12  represents pixel values of the RGB. When the bit length is 10 bits, each pixel value is a value in the rage of 0-1023. The axis of ordinates in  FIG. 12  represents brightness. Curve  11  represents the relationship between the pixel value and the brightness of a monitor with a standard brightness. The dynamic range of the monitor with a standard brightness is 0-100%. 
     The ref_screen_luminance_white represents the brightness (cd/m 2 ) of the monitor that is to be the standard. The extended_range_white_level represents the maximum value of the brightness of the dynamic range after extension. In the case  30  of  FIG. 12 , 400 is set as the value of the extended_range_white_level. 
     The nominal_black_level_code_value represents the pixel value of black (brightness 0%), and the nominal_white_level_code-value represents the pixel value of white (brightness 100%) in a monitor having a standard brightness. The extended_white_level_code value represents the pixel value of white in the dynamic range after extension. 
     In the case of  FIG. 12 , as illustrated by hollow arrow #161, the dynamic range of 0-100% is extended to a dynamic range of 0-400% in accordance with the value of the extended_range_white_level. Furthermore, a pixel value corresponding to the brightness of 400% is designated by the extended white level code value. 
     The brightness characteristic of the HDR video is represented by curve L 12  in which the values of the nominal_black_levelcode_value, the nominal_white_level_code_value, and the extended_white_level_code_value are 0%, 100%, and 400%, respectively. 
     As described above, with the Tone mapping information in which 4 is set as the value of the tone_map_model_id, the brightness characteristic of the master HDR video is represented and is transmitted to the reproduction device  2  from the recording device  1 . 
     &lt;3. BD Format&gt; 
     Herein, description of a BD-ROM format will be given. 
     [Data Management Structure] 
       FIG. 13  is a diagram illustrating an example of a management structure of an AV stream in BD-ROM format. 
     The management of the AV stream including the HEVC stream is performed using two layers, namely, PlayList and Clip. The AV stream may, in some cases, be recorded not only on an optical disc  11  but also in a local storage of the reproduction device  2 . 
     A pair of a single AV stream and Clip Information, which is information associated with the AV stream, is managed as a single object. A pair of the AV stream and the Clip Information is referred to as a Clip. 
     The AV stream is developed on a time axis and an access point of each Clip is, mainly, designated in the PlayList with a time stamp. The Clip Information is used to, for example, find the address to start decoding in the AV stream. 
     The PlayList is a group of reproduction sections of the AV stream. A single reproduction section in the AV stream is referred to as a PlayItem. The PlayItem is expressed by a pair of an IN point and an OUT point in the reproduction section on the time axis. As illustrated in  FIG. 13 , the PlayList is configured of a single or a plurality of PlayItems. 
     The first PlayList from the left in  FIG. 13  is configured of two PlayItems, and with the two PlayItems, reference is made to a former portion and a latter portion of the AV stream included in the Clip on the left side. 
     The second PlayList from the left is configured of a single PlayItem, and with the PlayItem, reference is made to the entire AV stream included in the Clip on the right side. 
     The third PlayList from the left is configured of two PlayItems, and with the two PlayItems, reference is made to a certain portion of the AV stream included in the Clip on the left side and a certain portion of the AV stream included in the Clip on the right side. 
     For example, when the PlayItem on the left side included in the first PlayList from the left is designated as a target to be reproduced by a disc navigation program, reproduction of the former portion of the AV stream included in the clip on the left side, which the PlayItem refers to, is performed. As described above, the PlayList is used as reproduction management information for managing the reproduction of the AV stream. 
     In the PlayList, a reproduction path formed of a line of one or more PlayItems is referred to as a Main Path. Furthermore, in the PlayList, a reproduction path that runs parallel to the Main Path and that is formed of a line of one or more SubPlayItems is referred to as a Sub Path. 
       FIG. 14  is a diagram illustrating structures of the Main Path and the Sub Paths. 
     A PlayList includes a single Main Path and one or more Sub Paths. The PlayList in  FIG. 14  is formed of a line of three PlayItems including a single Main Path and three Sub Paths. 
     The PlayItems configuring the Main Path are each set with an ID in order from the top. The Sub Paths are also set with IDs, namely, Subpath_id=0, Subpath_id=1, and Subpath_id=2, in order from the top. 
     In the example in  FIG. 14 , a single SubPlayitem is included in the Sub Path of SubPath_id=0, and two SubPlayItems are included in the Sub Path of SubPath_id=1. Furthermore, a single SubPlayItem is included in the Sub Path of SubPath_id=2. 
     The AV stream that a single PlayItem refers to at least includes a video stream (a main image data). The AV stream may include one or more audio streams that are reproduced at the same timing (in synchronization) with the video stream included in the AV stream or may not include any audio stream. 
     The AV stream may include one or more streams of bitmap caption data (presentation graphics (PG)) that are reproduced in synchronization with the video stream included in the AV stream or may not include any stream of caption data. 
     The AV stream may include one or more streams of interactive graphics (IG) that are reproduced in synchronization with the video stream included in the AV stream file or may not include any stream of interactive graphics. The IG stream is used for displaying graphics such as a button that is operated by the user. 
     In the AV stream referred to by a single PlayItem, a video stream and an audio steam, a PG stream, and an IG stream that synchronize with the video steam are multiplexed. 
     Furthermore, one SubPlayItem refers to a video steam, an audio stream, a PG stream, and the like that are different from the streams of the AV stream referred to by the PlayItem. 
     As described above, the reproduction of the AV stream including the HEVC stream is performed using the PlayList and the Clip Information. The PlayList and the Clip Information including the information related to the reproduction of the AV stream will be referred to as Data Base information, as appropriate. 
     [Directory Structure] 
       FIG. 15  is a diagram illustrating a structure in which the file that is recorded in the optical disc  11  is managed. 
     Each of the files that is recorded on the optical disc  11  is managed in a hierarchical manner with the directory structure. A single root directory is created on the optical disc  11 . 
     A BDMV directory is located under the root directory. 
     An Index file that is a file set with a name “Index.bdmv” and a MovieObject file that is a file set with a name “MovieObject.bdmv” are stored under the BDMV directory. 
     A PLAYLIST directory, a CLIPINF directory, a STREAM directory, and the like are provided under the BDMV directory. 
     The PLAYLIST directory stores PlayList files in which PlayLists are described. Each PlayList is named with a combination of a five-digit number and an extension “.mpls”. One of the PlayList files illustrated in  FIG. 15  is set with a file name of “00000.mpls”. 
     The CLIPINF directory stores Clip Information files. Each Clip Information file is named with a combination of a five-digit number and an extension “.clpi”. The three Clip Information files in  FIG. 15  are set with file names of “10001.clpi”, “00002.clpi”, and “00003.clpi”. 
     Stream files are stored in the STREAM directory. Each stream file is named with a combination of a five-digit number and an extension “.m2ts”. The three stream files in FIG. are set with fie names of “00001.m2ts”, “00002.m2ts”, and “00003.m2ts”. 
     The Clip Information file and the stream file that have the same five-digit numbers set in the file names are files that constitute a single Clip. When reproducing the stream file “00001.m2ts”, the Clip Information file “00001.clpi” is used, and when reproducing the stream file “00002.m2ts” the Clip Information file “00002.clpi” is used. As will be described later, information related to HDR video processing is included in the Clip Information file used to reproduce the AV stream including the HEVC stream. 
     [Syntax of Each File] 
     Herein, main descriptions of the syntax of each file will be described. 
       FIG. 16  is a diagram illustrating syntax of the Play List file. 
     The PlayList file is stored in the PLAYLIST directory in  FIG. 15  and is a file that is set with the extension “.mpls”. 
     AppInfoPlayList ( ) stores parameters that is related to the reproduction control of the PlayList, such as a reproduction restriction. 
     PlayList ( ) stores parameters related to the Main Path and the Sub Path. 
     PlayListMark ( ) stores mark information of the PlayList, in other words, the PlayListMark ( ) stores information related to marks that are jump destinations (jump points) in an user operation, a command, or the like commanding a chapter jump. 
       FIG. 17  is a diagram illustrating syntax of the Clip Information file. 
     The Clip Information file is stored in the CLIPINF directory in  FIG. 15  and is a file that is set with the extension “.clpi”. 
     Clipinfo ( ) stores information, such as information representing the type of AV stream configuring the Clip, information representing the recording rate of the AV stream, and the like. 
     SequenceInfo ( ) includes information representing, on the time axis, the position of the source packet configuring the AV stream, information representing the displayed clock time, and the like. 
     ProgramInfo ( ) includes information related to the PID of the AV stream configuring the Clip, information related to coding of the AV stream, and the like. 
       FIG. 18  is a diagram illustrating syntax of the ProgramInfo ( ) in  FIG. 17 . 
     Number_of_program_sequences represents the number of program sequences described in the ProgramInfo ( ). A program sequence is constituted by a line of source packets constituting a program. 
     SPN_program_sequence_start[i] represents the source packet number at the head of the program sequence. 
     StreamCodingInfo includes information related to coding of the AV stream configuring the Clip. 
       FIG. 19  is a diagram illustrating syntax of the StreamCodingInfo in  FIG. 18 . 
     Stream_coding_type represents the coding method of an elementary stream included in the AV stream. For example, in the StreamCodingInfo of the Clip 20 Information used for reproduction of the HEVC stream, a value representing that the coding method is HEVC is set as stream_coding_type. 
     Video_format represents the video scanning method. In the video format used to reproduce the HEVC stream, a value representing a 4K scanning method such as 2160p (2160 line progressive) is set as stream_coding_type. 
     Frame_rate represents the frame rate of the video stream. 
     Aspect ratio represents the aspect ratio of the video. 
     Cc_flag 1s a one-bit flag and represents whether closed caption data is included in the video stream. 
     HDR_flag is a one-bit flag and represents whether an HDR video is recorded as a master. For example, HDR_flag=1 represents that recoding of an HDR video as a master is being performed. Furthermore, HDR_flag=0 represents that recoding of an STD video as a master is being performed. 
     Mode_flag is a one-bit flag and represents the recording mode of the HEVC stream. The mode_flag becomes valid when HDR_flag=1. For example, mode_flag=1 represents that the recording mode is mode-i. Furthermore, mode_flag=0 represents that the recording mode is mode-ii. 
     As described above, the Clip Information includes a flag representing whether the HEVC stream included in the AV stream in which reproduction is performed using the Clip Information is a stream in which the master is the HDR video, and a flag representing the recording mode of the HEVC stream. 
     By referring to the flag included in the Clip Information, the reproduction device  2  is capable of specifying whether the master video is an HDR video without actually analyzing the HEVC stream. 
     &lt;4. Configuration of Each Device&gt; 
     Herein, a configuration of each device will be described. 
     [Configuration of Recording Device  1 ] 
       FIG. 20  is a block diagram illustrating an exemplary configuration of the recording device  1 . 
     The recording device  1  includes a controller  21 , a coding processing unit  22 , and a disc drive  23 . The master HDR video is input to the coding processing unit  22 . 
     The controller  21  includes a central processing unit (CPU), a read-only memory (ROM), and a random access memory (RAM). The controller  21  executes a predetermined program and controls the overall operation of the recording device  1 . 
     In the controller  21 , a Data Base information generation unit  21 A is implemented by executing a predetermined program. The Data Base information generation unit  21 A generates a PlayList and a Clip that are Data Base information and outputs the PlayList and the Clip to the disc drive  23 . 
     The coding processing unit  22  performs coding of the master HDR video. The coding processing unit  22  outputs the HEVC stream, which has been obtained by coding the master HDR video, to the disc drive  23 . 
     The disc drive  23  records a file that stores the PlayList and the Clip Information supplied from the controller  21  and the HEVC stream supplied from the coding processing unit  22  on the optical disc  11  according to the directory structure in  FIG. 15 . 
       FIG. 21  is a block diagram illustrating an exemplary configuration of the coding processing unit  22  in  FIG. 20 . 
     The coding processing unit  22  includes an HDR information generation unit  31 , an HEVC encoder  32 , an HDR-STD conversion unit  33 , a definition information generation unit  34 , and an HEVC stream generation unit  35 . 
     The HDR information generation unit  31  detects the brightness of the input master HDR video and generates HDR information including each of the pieces of information that have been described while referring to  FIG. 12 . The HDR information generation unit  31  outputs the generated HDR information to the HEVC stream generation unit  35 . 
     When the recording mode is mode-i, the HEVC encoder  32  performs coding of the input master HDR video with HEVC. Furthermore, when the recording mode is mode-ii, the HEVC encoder  32  performs coding of the STD video, which has been supplied from the HDR-STD conversion unit  33 , with HEVC. The HEVC encoder  32  outputs the coded data of the HDR video or the coded data of the STD video to the HEVC stream generation unit  35 . 
     The HDR-STD conversion unit  33  converts the input master HDR video to an STD video. The conversion by the HDR-STD conversion unit  33  is performed, as appropriate, in accordance with a conversion parameter input by the author. The HDR-STD conversion unit  33  outputs information representing the correlation between an input data, which is the RGB signal of the HDR video, and an output data, which is the RGB signal of the STD video, to the definition information generation unit  34 . 
       FIG. 22  is a diagram illustrating an example of signal processing performed by the HDR-STD conversion unit  33 . 
     As illustrated at the end of arrow #201, the HDR-STD conversion unit  33  converts an YCrCb signal of the input master HDR video to an RGB signal, and performs conversion (tone mapping) of each RGB signal to the corresponding RGB signal of the STD video. 
     The HDR-STD conversion unit  33  outputs information representing the correlation between the RGB signal of the HDR video, which is an input data, and the RGB signal of the STD video, which is an output data, to the definition information generation unit  34 . As illustrated at the end of arrow #202, the information output to the definition information generation unit  34  is used to generate the tone mapping definition information. 
     Furthermore, as illustrated at the end of #203, the HDR-STD conversion unit  33  converts the RGB signal of the STD video to an YCrCb signal and outputs the YCrCb signal. 
       FIG. 23  is a diagram illustrating an example of tone mapping. 
     As illustrated in  FIG. 23 , for example, the RGB signal of the HDR video is converted to the RGB signal of the STD video by compressing the high brightness components and by extending the intermediate and low brightness components. Information expressing a function F that correlates the RGB signal of the HDR video and the RGB signal of the STD video is, as illustrated in  FIG. 23 , generated by the definition information generation unit  34 . Note that the function F illustrated in  FIG. 23  is the Tone mapping information of tone_map_model_id=3 that draws a relationship between the coded data and the target data with a polygonal line function that have been described while referring to  FIG. 11 . 
     Returning back to the description of  FIG. 21 , when the recording mode is mode-ii, the HDR-STD conversion unit  33  outputs the STD video that has been obtained by converting the HDR video to the HEVC encoder  32 . 
     On the basis of the information supplied from the HDR-STD conversion unit  33 , the definition information generation unit  34  generates tone mapping definition information for HDR-STD conversion. 
     For example, when tone_map_model_id=0 is used, the definition information generation unit  34  generates Tone mapping information including the values min_value and max_value in  FIG. 9  as tone mapping definition information for HDR-STD conversion. 
     Furthermore, when tone_map_model_id=2 is used, the definition information generation unit  34  generates Tone mapping information including start_of_coded_interval[i] m  FIG. 10  as tone mapping definition information for HDR-STD conversion. 
     Furthermore, when tone_map_model_id=3 is used, the definition information generation unit  34  generates Tone mapping information including coded_pivot_value[i] and target_pivot_value[i], the numbers of which are designated by the num_pivots in  FIG. 11 , as tone mapping definition information for HDR-STD conversion. 
     In accordance with the recording mode, the HEVC stream generation unit sets the same value to the Tone mapping information including HDR information supplied from the HDR information generation unit  31  and to the tone_map_id of the Tone mapping information including the tone mapping definition information supplied from the definition information generation unit  34 . Furthermore, the HEVC stream generation unit  35  inserts, as SEI, the Tone mapping information including the HDR information and the Tone mapping information including the tone mapping definition information into the coded data and generates the HEVC stream. The HEVC stream generation unit  35  outputs the generated HEVC stream to the disc drive  23 . 
     [Configuration of Reproduction Device  2 ] 
       FIG. 24  is a block diagram illustrating an exemplary configuration of the reproduction device  2 . 
     The reproduction device  2  includes a controller  51 , a disc drive  52 , a memory  53 , a local storage  54 , a network interface  55 , a decoding processing unit  56 , an operation input unit  57 , and an HDMI communication unit  58 . 
     The controller  51  includes a CPU, a ROM, and a RAM. The controller  51  executes a predetermined program and controls the overall operation of the reproduction device  2 . 
     The disc drive  52  reads out data from the optical disc  11  and outputs the read out data to the controller  51 , the memory  53 , or the decoding processing unit  56 . For example, the disc drive  52  outputs the Data Base information read out from the optical disc  11  to the controller  51  and outputs an HEVC stream to the decoding processing unit  56 . 
     The memory  53  stores data that is needed by the controller  51  to execute various processing. A register  53 A that is a player status register (PSR) is formed in  10  the memory  53 . Various information that the reproduction device  2 , which is the BD Player, refers to when reproducing the optical disc  11  is stored in the register  53 A. 
     The local storage  54  includes, for example, a hard disk drive (HDD). A 15 stream and the like downloaded from a server is recorded in the local storage  54 . 
     The network interface  55  communicates with the server through a network such as the Internet and supplies the data downloaded from the server to the local storage  54 . 
     The decoding processing unit  56  decodes the HEVC stream supplied from the disc drive  52  and outputs the data of the HDR video or the STD video to the HDMI communication unit  58 . When the decoding processing unit  56  outputs the HDR video, the HDR information is output to the HDMI communication unit  58  together with the data of the HDR video. 
     The operation input unit  57  includes input devices such as a button, a key, and a touch panel and a receiving section that receives a signal such as an infrared signal that is transmitted from a predetermined remote commander. The operation input unit  57  detects the operation of the user and supplies a signal that represents the details of the detected operation to the controller  51 . 
     The HDMI communication unit  58  performs communication with the display device  3  through the HDMI cable  4 . For example, the HDMI communication unit  58  acquires information related to the performance of the monitor included in the display device  3  and outputs the information to the controller  51 . Furthermore, the HDMI communication unit  58  outputs the data of the HDR video or the STD video, which has been supplied from the decoding processing unit  56 , to the display device  3 . 
       FIG. 25  is a block diagram illustrating an exemplary configuration of the decoding processing unit  56  in  FIG. 24 . 
     The decoding processing unit  56  includes a parameter extraction unit  71 , an HEVC decoder  72 , an HDR-STD conversion unit  73 , an STD-HDR conversion unit  74 , and an output unit  75 . The output unit  75  includes an HDR video output unit  75 A and an STD video output unit  75 B. 
     The HEVC stream read out from the disc drive  52  is input to the parameter extraction unit  71 . For example, the information representing the recording mode that is specified by mode_flag included in the Clip Information, and information that is related to the performance of the monitor included in the display device  3  and that is specified by information acquired from the display device  3  are supplied to the decoding processing unit  56  from the controller  51 . 
     The parameter extraction unit  71  extracts HDR information and tone mapping definition information from the SEI of the HEVC stream. For example, when the recording mode is mode-i and when an HDR video is output to the display device  3 , the parameter extraction unit  71  outputs the HDR information to the HDR video output unit  75 A. Furthermore, when the recording mode is mode-i and when an STD video is output to the display device  3 , the parameter extraction unit  71  outputs tone mapping definition information for HDR-STD conversion to the HDR-STD conversion unit  73 . 
     On the other hand, when the recording mode is mode-ii and when an HDR video is output to the display device  3 , the parameter extraction unit  71  outputs the HDR information to the HDR video output unit  75 A and also outputs tone mapping definition information for STD-HDR conversion to the STD-HDR conversion unit  74 . When the recording mode is mode-ii and when an STD video is output to the display device  3 , the extracted HDR information and tone mapping definition information are not used. 
     Furthermore, the parameter extraction unit  71  outputs the coded data included in the HEVC stream to the HEVC decoder  72 . 
     The HEVC decoder  72  decodes the coded data of the HEVC supplied from the parameter extraction unit  71 . When the recording mode is mode-i, the HEVC decoder  72  outputs the HDR video, which has been obtained by decoding, to the HDR-STD conversion unit  73  and the HDR video output unit  75 A. Furthermore, when the recording mode is mode-ii, the HEVC decoder  72  outputs the STD video, which has been obtained by decoding, to the STD-HDR conversion unit  74  and the STD video output unit  75 B. 
     The HDR-STD conversion unit  73  converts the HDR video, which has been supplied from the HEVC decoder  72 , to an STD video on the basis of the tone mapping definition information for HDR-STD conversion supplied from the parameter extraction unit  71 . The HDR-STD conversion unit  73  outputs the STD video obtained by conversion to the STD video output unit  75 B. 
     The STD-HDR conversion unit  74  converts the STD video supplied from the HEVC decoder  72  to an HDR video on the basis of the tone mapping definition information for STD-HDR conversion supplied from the parameter extraction unit  71 . The STD-HDR conversion unit  74  outputs the HDR video obtained by conversion to the HDR video output unit  75 A. 
     When outputting the HDR video to the display device  3 , the HDR video output unit  75 A of the output unit  75  outputs the HDR video supplied from the HEVC decoder  72  or the HDR video supplied from the STD-HDR conversion unit  74 , together with the HDR information supplied from the parameter extraction unit  71 . 
     When outputting the STD video to the display device  3 , the STD video output unit  75 B outputs the STD video supplied from the HEVC decoder  72  or the STD video supplied from the HDR-STD conversion unit  73 . 
     The data output from the HDR video output unit  75 A and the STD video output unit  75 B is transmitted to the display device  3  by the HDMI communication unit  58 . 
     [Configuration of Display Device  3 ] 
       FIG. 26  is a block diagram illustrating an exemplary configuration of the display device  3 . 
     The display device  3  includes a controller  101 , an HDMI communication unit  102 , a signal processing unit  103 , and a monitor  104 . The controller  101  includes a memory  10  IA. 
     The controller  101  includes a CPU, a ROM, and a RAM. The controller  101  executes a predetermined program and controls the overall operation of the display device  3 . 
     For example, the controller  101  makes the memory  101 A store extended display identification data (EDID) that represents the performance of the monitor  104  and performs management. When performing authentication between the reproduction device  2 , the controller  101  outputs the EDID that is stored in the memory  101 A to the HDMI communication unit  102  and transmits the EDID to the reproduction device  2 . On the basis of the EDID, the reproduction device  2  specifies the performance of the monitor  104  of the display device  3 . 
     The HDMI communication unit  102  performs communication with the reproduction device  2  through the HDMI cable  4 . The HDMI communication unit  102  receives video data transmitted from the reproduction device  2  and outputs the data to the signal processing unit  103 . Furthermore, the HDMI communication unit  102  transmits the EDID supplied from the controller  101  to the reproduction device  2 . 
     The signal process mg unit  103  performs processing on the video data supplied from the HDMI communication unit  102  and displays an image on the monitor  104 . 
     &lt;5. Operation of Each Device&gt; 
     Herein, an operation of each device having the above-described configuration will be described. 
     [Recording Processing] 
     Referring first to the flowchart in  FIG. 27 , recording processing of the recording device  1  will be described. The processing in  FIG. 27  starts when the master HDR video is input to the recording device  1 . 
     In step S 1 , the controller  21  of the recording device  1  determines whether the recording mode is mode-i. The recording mode is set by the author, for example. 
     When it is determined that the recording mode is mode-i in step S 1 , in step S 2 , the coding processing unit  22  performs coding processing in mode-i. The HEVC stream generated by the coding processing in mode-i is supplied to the disc drive  23 . 
     On the other hand, when it is determined that the recording mode is mode-ii in step S 1 , in step S 3 , the coding processing unit  22  performs coding processing in mode-ii. The HEVC stream generated by the coding processing in mode-ii is supplied to the disc drive  23 . 
     In step S 4 , the Data Base information generation unit  21 A performs Data Base information generation processing. The PlayList file and the Clip Information file generated by the Data Base information generation processing are supplied to the disc drive  23 . 
     In step S 5 , the disc drive  23  records the PlayList file, the Clip Information file, and the stream file that stores the HEVC stream on the optical disc  11 . Subsequently, the processing is ended. 
     Referring next to the flowchart in  FIG. 28 , the coding processing in mode-I performed in step S 2  in  FIG. 27  will be described. 
     In step S 11 , the HDR information generation unit  31  of the coding processing unit  22  detects the brightness of the master HDR video and generates HDR information. 
     In step S 12 , the HEVC encoder  32  performs coding on the master HDR video by HEVC and generates coded data of the HDR video. 
     In step S 13 , the HDR-STD conversion unit  33  converts the input master HDR video to an STD video. Information representing the correlation between an input data, which is the RGB signal of the HDR video, and an output data, which is the RGB signal of the STD video, is supplied to the definition information generation unit  34 . 
     In step S 14 , on the basis of the information supplied from the HDR-STD conversion unit  33 , the definition information generation unit  34  generates tone mapping definition information for HDR-STD conversion. 
     In step S 15 , the HEVC stream generation unit  35  sets an ID for mode-i to the Tone mapping information including the HDR information generated by the HDR information generation unit  31  and to the tone_map_id of the Tone mapping information including the tone mapping definition information generated by definition information generation unit  34 . Furthermore, the HEVC stream generation unit  35  inserts the Tone mapping information including the HDR information and the Tone mapping information including the tone mapping definition information in the coded data and generates an HEVC stream. Subsequently, the process returns to step S 2  in  FIG. 27  and the processing thereafter is performed. 
     Referring next to the flowchart in  FIG. 29 , the coding processing in mode-ii performed in step S 3  in  FIG. 27  will be described. 
     In step S 21 , the HDR information generation unit  31  of the coding processing unit  22  detects the brightness of the master HDR video and generates HDR information. 
     In step S 22 , the HDR-STD conversion unit  33  converts the input master HDR video to an STD video. Information representing the correlation between an input data, which is the RGB signal of the HDR video, and an output data, which is the RGB signal of the STD video, is supplied to the definition information generation unit  34 . 
     In step S 23 , on the basis of the information supplied from the HDR-STD conversion unit  33 , the definition information generation unit  34  generates tone  30  mapping definition information for STD-HDR conversion. 
     In step S 24 , the HEVC encoder  32  performs, by HEVC, coding on the STD video obtained by converting the master HDR video and generates coded data of the STD video. 
     In step S 25 , the HEVC stream generation unit  35  sets an ID for mode-ii to the Tone mapping information including the HDR information generated by the HDR information generation unit  31  and to the tone_map_id of the Tone mapping information including the tone mapping definition information generated by definition information generation unit  34 . Furthermore, the HEVC stream generation unit  35  inserts the Tone mapping information including the HDR information and the Tone mapping information including the tone mapping definition information in the coded data and generates an HEVC stream. Subsequently, the process returns to step S 3  in  FIG. 27  and the processing thereafter is performed. 
     Referring next to the flowchart in  FIG. 30 , the Data Base information generation processing performed in step S 4  in  FIG. 27  will be described. 
     In step S 31 , the Data Base information generation unit  21 A of the controller  21  generates a PlayList including various information described while referring to  FIG. 16 . The PlayList that the Data Base information generation unit  21 A generates includes information relating to a PlayItem that designates the HEVC stream as a reproduction section. 
     In step S 32 , the Data Base information generation unit  21 A generates Clip Information including the HDR_flag and the mode_flag in the StreamCodinginfo of the Programinfo ( ). In the present example, since the master video is an HDR video, the Data Base information generation unit  21 A sets 1 that represents that the master video is an HDR video as a value of the HDR_flag. 
     Furthermore, in step S 2  in  FIG. 27 , when the coding processing is performed in mode-i, the Data Base information generation unit  21 A sets 1 that represents that the recording mode is mode-i as a value of the mode_flag. On the other hand, in step S 3  in  FIG. 27 , when the coding processing is performed in mode-ii, the Data Base information generation unit  21 A sets 0 that represents that the recording mode is mode-ii as a value of the mode_flag. Subsequently, the process returns to step S 4  in  FIG. 27  and the processing thereafter is performed. 
     In the recording device  1 , the HEVC stream and the Data Base information generated with the above processing are recorded on the optical disc  11   
     [Reproduction Processing] 
     Referring next to the flowchart in  FIG. 31 , reproduction processing of the reproduction device  2  will be described. 
     At a predetermined timing such as when starting reproduction of the optical disc  11 , the controller  51  of the reproduction device  2  controls the HDMI communication unit  58  and communicates with the display device  3  to read out the EDID from the memory  101 A of the display device  3 . The controller  51  stores the information representing the performance of the monitor included in the display device  3  in the register  53 A and performs management. 
     In step S 41 , the controller  51  controls the disc drive  52  and reads out the PlayList and the Clip Information, which are Data Base information, from the optical disc  11 . Furthermore, on the basis of the information included in the Play List, the controller  51  specifies the HEVC stream to be reproduced and controls the disc drive  52  to read out the AV stream including the specified HEVC stream from the optical disc  11 . 
     In step S 42 , the controller  51  refers to the HDR_flag and the mode_flag included in the Clip Information. In the present example, the HDR_flag is set with a value that represents that recording of the HDR video as a master is being performed. With the above, the recording device  1  is brought into a state in which reproduction of the HDR video or the STD video obtained by converting the HDR video can be performed. 
     In step S 43 , the controller  51  determines whether the recording mode is mode-i on the basis of the value of the mode_flag. 
     When it is determined that the recording mode is mode-i in step S 43 , in step S 44 , the decoding processing unit  56  performs decoding processing in mode-i. 
     On the other hand, when it is determined that the recording mode is mode-ii in step S 43 , in step S 45 , the decoding processing unit  56  performs decoding processing in mode-ii. 
     After the decoding processing is performed in step S 44  or step S 45 , the process is ended. 
     Note that, herein, while the determination on whether the recording mode is mode-i is made on the basis of the value of the mode_flag, the determination may be made on the basis of the tone_map_id of the Tone mapping information inserted into the HEV C stream. 
     Referring next to the flowchart in  FIG. 32 , the decoding processing in mode-i performed in step S 44  in  FIG. 31  will be described. 
     In step S 61 , the parameter extraction unit  71  of the decoding processing unit  56  extracts HDR information and tone mapping definition information from the SEI of the HEVC stream. The parameter extraction unit  71  outputs the coded data of the HEVC included in the HEVC stream to the HEVC decoder  72 . 
     In step S 62 , the HEVC decoder  72  decodes the coded data of the HEVC and outputs the HDR video obtained by decoding to the HDR-STD conversion unit  73  and the HDR video output unit  75 A. 
     In step S 63 , on the basis of the information stored in the register  53 A, the controller  51  determines whether the monitor included in the display device  3  is an HDR monitor. As described above, information related to the performance of the monitor included in the display device  3  is stored in the register  53 A on the basis of the EDID of the HDMI read out from the display device  3 . 
     When it is determined that the monitor included in the display device  3  is an HDR monitor in step S 63 , in step S 64 , the HDR video output unit  75 A outputs the HDR video supplied from the HEVC decoder  72  together with the HDR information supplied from the parameter extraction unit  71 . 
     On the other hand, when it is determined that the monitor included in the display device  3  is not an HDR monitor but is an STD monitor in step S 63 , in step S 65 , the HDR-STD conversion unit  73  converts the HDR video supplied from the HEVC decoder  72  to an STD video on the basis of the tone mapping definition information for HDR-STD conversion supplied from the parameter extraction unit  71 . 
     In step S 66 , the STD video output unit  751  outputs the STD video obtained by performing conversion in the HDR-STD conversion unit  73 . 
     In step S 67 , after the HDR video has been output in step S 64  or after the STD video has been output in step S 66 , the controller  51  determines whether the reproduction is to be ended. 
     When it is determined in step S 67  that the reproduction is not to be ended, the controller  51  returns the process to step S 61  and performs repetition of the above processing. When it is determined in step S 67  that the reproduction is to be ended, the process returns to step S 44  in  FIG. 31  and the processing thereafter is performed. 
     Referring next to the flowchart in  FIG. 33 , the decoding processing in mode-ii performed in step S 45  in  FIG. 31  will be described. 
     In step S 81 , the parameter extraction unit  71  of the decoding processing unit  56  extracts HDR information and tone mapping definition information from the SEI of the HEVC stream. The parameter extraction unit  71  outputs the coded data of the HEVC included in the HEVC stream to the HEVC decoder  72 . 
     In step S 82 , the HEVC decoder  72  decodes the coded data of the HEVC and outputs the STD video obtained by decoding to the STD-HDR conversion unit  74  and the STD video output unit  75 B. 
     In step S 83 , on the basis of the information stored in the register  53 A, the controller  51  determines whether the monitor included in the display device  3  is an HDR monitor. 
     When it is determined that the monitor included in the display device  3  is an HDR monitor in step S 83 , in step S 84 , the STD-HDR conversion unit  74  converts the STD video supplied from the HEVC decoder  72  to an HDR video on the basis of the tone mapping definition information for STD-HDR conversion supplied from the parameter extraction unit  71 . 
     In step S 85 , the HDR video output unit  75 A outputs the HDR video, which has been obtained by conversion with the STD-HDR conversion unit  74 , together with the HDR information supplied from the parameter extraction unit  71 . 
     On the other hand, when it is determined that the monitor included in the display device  3  is an STD monitor in step S 83 , in step S 86 , the STD video output unit  75 B outputs the STD video supplied from the HEVC decoder  72 . 
     In step S 7 , after the HDR video has been output in step S 85  or after the STD video has been output in step S 86 , the controller  51  determines whether the reproduction is to be ended. 
     When it is determined in step S 87  that the reproduction is not to be ended, the controller  51  returns the process to step S 81  and performs repetition of the above processing. When it is determined in step S 87  that the reproduction is to be ended, the process returns to step S 45  in  FIG. 31  and the processing thereafter is performed. 
     [Display Processing] 
     Referring next to the flowchart in  FIG. 34 , display processing of the display device  3  will be described. 
     Herein, a case in which the monitor  104  included in the display device  3  is an HDR monitor will be described. An HDR video to which HDR information is added is transmitted to the display device  3  including an HDR monitor from the reproduction device  2 . 
     In step S 101 , the HDMI communication unit  102  of the display device  3  receives the HDR video and the HDR information transmitted from the reproduction device  2 . 
     In step S 102 , the controller  101  refers to the HDR information and determines whether the HDR video transmitted from the reproduction device  2  can be displayed as it is. The HDR information includes information of the master HDR video, that is, information representing the brightness characteristic of the HDR video transmitted from the reproduction device  2 . The determination in step S 102  is performed by comparing the brightness characteristic of the HDR video specified by the HDR information and the display performance of the monitor  104  with each other. 
     For example, m a case in which the dynamic range of the HDR video specified by the HDR information is 0-400% and the dynamic range of the monitor  104  is 0-500% (500 cd/m 2  assuming that the brightness of 100% is 100 cd/m 2 , for example), it is determined that the HDR video can be displayed as it is. On the other hand, in a case in which the dynamic range of the HDR video specified by the HDR information is 0-400% and the dynamic range of the monitor  104  is 0-300%, it is determined that the HDR video cannot be displayed as it is. 
     When it is determined that the HDR video can be displayed as it is in step S 102 , in step S 103 , the signal processing unit  103  displays an image of the HDR video on the monitor  104  in accordance with the brightness designated by the HDR information. For example, in a case in which the brightness characteristic drawn by the curve L 12  in  FIG. 12  is designated by the HDR information, each of the pixel values expresses a brightness in the range of 0-400% that is drawn by the curve L 12 . 
     On the other hand, when it is determined that the HDR video cannot be displayed as it is in step S 102 , in step S 104 , the signal processing unit  103  adjusts the brightness in accordance with the display performance of the monitor  104  and displays an image of the HDR video, the brightness of which has been adjusted, on the monitor  104 . For example, in a case in which the brightness characteristic drawn by the curve L 12  in  FIG. 12  is designated by the HDR information and when the dynamic range of the monitor  104  is 0-300%, compression is performed so that each of the pixels express the brightness in the range of 0-300%. 
     After the image of the HDR video has been displayed in step S 103  or in step S 104 , in step S 105 , the controller  101  determines whether the display is to be ended and when it is determined that the display is not to be ended, processing from step S 101  and after is repeated. When determination is made to end the display in step S 105 , the controller  101  ends the processing. 
     With the above sequential processing, the recording device  1  can record the master HDR video on the optical disc  11  as it is and have the reproduction device  2  perform reproduction so that the image of the HDR video is displayed on the display device  3 . 
     Furthermore, the recording device  1  can convert the master HDR video to an STD video, record the STD video on the optical disc  11 , and have the reproduction device  2  restore the STD video into an HDR video so that the image of the HDR video is displayed on the display device  3 . 
     When reproducing the HDR video, by enabling the brightness characteristic of the master HDR video to be designated with the HDR information, the author of the content is capable of displaying an image of the HDR video at an intended brightness. 
     &lt;6. Modifications&gt; 
     [Storing Position of Flag] 
     While it has been described above that the HDR_flag and the mode_flag are stored in the Clip Information, the HDR_flag and the mode_flag may be stored in the PlayList. 
     A First Example of Storing Position 
       FIG. 35  is a diagram illustrating an example of syntax of the AppInfoPlayList ( ) included in the PlayList file in  FIG. 16 . 
     As it has been described above, the AppInfoPlayList ( ) stores parameters that is related to the reproduction control of the PlayList, such as a reproduction restriction. In the example in FIG.  35 , the HDR_flag and the mode_flag are described continuously after MV C_Base_view_R_flag. 
     As described above, the HDR_flag and the mode_flag may be described in the AppInfoPlayList ( ) of the PlayList file. 
     A Second Example of Storing Position 
       FIG. 36  is a diagram illustrating syntax of PlayList ( ) included in the PlayList file in  FIG. 16 . 
     Number_of_PlaylItems represents the number of PlayItems in the PlayList. In the case of the example in  FIG. 14 , the number of PlayItems is three. The PlayItem_ids are each allocated with a number as its value, in the order of appearance of the PlayItem ( ) in the PlayList, starting from 0. 
     Number_of_SubPaths represents the number of Sub Paths in the PlayList. In the case of the example in  FIG. 14 , the number of Sub Paths is three. The Sub Path_ids are each allocated with a number as its value, in the order of appearance of the SubPath ( ) in the Play List, starting from 0. 
     As illustrated in  FIG. 36 , in the PlayList, the PlayItem ( ) is described the number of times that corresponds to the number of the PlayItems, and the SubPath ( ) is described the number of times that corresponds to the number of the Sub Paths. 
       FIG. 37  is a diagram illustrating syntax of the Play Item( ) in  FIG. 36 . 
     Clip_Information_file_name[0] represents the name of the Clip Information file of the Clip to which the PlayItem refers. Clip_codec_identifier[0] represents the codec system of the Clip. 
     IN_time represents the start position of the reproduction section of the PlayItem and OUT_time represents the end position. UO mask table ( ), PlayItem_random_access_mode, still mode are included after the OUT time. 
     Information of the AV stream to which the PlayItem refers is included in STN_table ( ). In a case in which there is a Sub Path that is reproduced in association with the PlayItem, the AV steam information that the SubPlayItem, which constitutes the Sub Path, refers to is also included. 
       FIG. 38  is a diagram illustrating syntax of the STN_table ( ) in  FIG. 37 . 
     Number_of_video_stream_entries represents the number of video streams that are entered (registered) in the STN_table ( ). Number of audio stream entries represents the number of streams of the first audio stream that is entered in the STN_table ( ). Number_of_audio_stream2_entries represents the number of streams of the second audio stream that is entered in the STN_table ( ). 
     Number of PG textST stream entries represents the number of PG_textST streams entered in the STN_table ( ). PG textST stream is a presentation graphics (PG) stream and a text caption file (textST) that are run-length coded bitmap captions. Number_of_IG_stream_entries represents the number of interactive graphics (IG) streams that is entered in the STN_table ( ). 
     Stream_entry ( ) and stream_attributes ( ) that are information of each of the video streams, the first video stream, the second video stream, the PG_textST stream and the IG stream are described in the STN_table ( ). PID of the stream is included in the stream_entry ( ), and attribute information of the stream is included in the stream_attributes ( ). 
       FIG. 39  is a diagram illustrating an example of a description related to the video stream, which is a description in the description of the stream_attributes ( ) in  FIG. 38 . 
     In the example of the stream_attributes ( ) in  FIG. 39 , stream_coding_type, video format, and frame rate are described as the attribute information of the video stream and the HDR_flag and the mode_flag are described after that. Note that the stream_coding_type represents the coding method of the video stream and the video_format represents the video format. The frame rate represents the frame rate of the video. 
     As described above, the HDR_flag and the mode_flag may be described in the STN_table O of the PlayList file. 
     The HDR_flag and the mode_flag may be described in a position in the PlayList file other than the AppInfoPlayList ( ) and the STN_table ( ). In a similar manner, the HDR_flag and the mode_flag may be described in a position in the Clip Information file other than the StreamCodingInfo described while referring to  FIG. 19 . 
     The positions where the HDR-flag and the mode_flag are described are optional, such as one of the HDR_flag and the mode_flag being described in the Clip Information file and the other being described in the PlayList file. 
     [PSR] 
       FIG. 40  is a diagram illustrating an example of an allocation of the PSR. 
     As described above, the register  53 A of the reproduction device  2  is used as a PSR. On the BD, each PSR is allocated with a PSR number defining the intended use of the relevant PSR. 
     HDR_capability_flag is stored in PSR29 that is a PSR with a PSR number of 29. For example, the value of the HDR_capability_flag of the PSR29 being 1 represents that the reproduction device  2  supports reproduction of an HDR video. Furthermore, the value of the HDR_capability_flag of the PSR29 being ( ) represents that the reproduction device  2  does not support reproduction of an HDR video. 
     For example, when an optical disc in which the value of the HDR_flag of the Clip Information is set to 1 is inserted, in other words, when an optical disc that have recorded a master HDR video is inserted, the HDR_capability_flag is referred to by the controller  51  that executes the disc navigation program. When the value of the HDR_capability_flag is set to 0, a message that requests a display device supporting the processing of the HDR video to be connected to the reproduction device  2  is displayed. 
     PSR25 that is a PSR with a PSR number of 25 is used as a PSR to record the information representing the correspondence of the connected monitor to an HDR video. In such a case, the information representing the performance of the monitor included in the display device  3 , which is represented by the EDID acquired from the display device  3 , is stored in the PSR25. 
     For example, HDR_display_capability_flag and information representing the brightness specification are stored in the PSR25 for HDR Display Capability. The value of the HDR display_capability_flag being 1 represents that the connected monitor is capable of displaying an HDR video. Furthermore, the value of the HDR_display_capability_flag being O represents that the connected monitor is not capable of displaying an HDR video. 
     For example, information representing the extent of brightness, in percent, that can be displayed is stored as information representing the brightness specification. 
     Rather than using the PSR25 for HDR Display Capability, the PSR23 that is a PSR for Display Capability may store information representing the HDR_display_capability_flag and the brightness specification. 
     &lt;7. Exemplary Case in which Brightness is Adjusted on Reproduction Device Side&gt; 
     In the above description, when the HDR video that has been transmitted from the reproduction device  2  cannot be displayed as it is, the display device  3  itself adjusted the brightness; however, the adjustment of the brightness of the HDR video may be performed by the reproduction device  2 . The display device  3  will be receiving an HDR video whose brightness has been adjusted by the reproduction device  2  and will be displaying an image of the HDR video. 
     [Signal Processing in Mode-i] 
       FIG. 41  is a diagram illustrating an example of signal processing in mode-i in a case in which the adjustment of the brightness of the HDR video is performed by the reproduction device  2 . 
     Among the processing illustrated in  FIG. 41 , the processing performed by the recording device  1  and the processing related to the output of the STD video performed by the reproduction device  2  are the same as the processing described while referring to  FIG. 2 . Redundant descriptions will be appropriately omitted. It is assumed that the HDR_display_capability_flag described above and the information representing the brightness specification are stored in the register  53 A of the reproduction device  2 . 
     The reproduction device  2  reads out the HEVC stream from the optical disc  11  and, as illustrated at the ends of arrows #21 and #22, extracts the HDR information and the tone mapping definition information from the SEI of the HEVC stream. 
     Furthermore, as illustrated at the end of arrow #23, the reproduction device  2  decodes the coded data of the HEVC. As illustrated at the end of arrow #301, when the display device  3  includes an HDR monitor but cannot display the HDR video as it is, the reproduction device  2  adjusts the brightness of the HDR video obtained by decoding the coded data. 
     For example, when the dynamic range of the HDR video represented by the HDR information is 0-400% and when it is represented that the dynamic range of the monitor  104  is 0-300% from the information representing the brightness specification stored in the register  53 A, the reproduction device  2  performs adjustment of the brightness. In the above case, the brightness of each pixel value is compressed to the range of 0-300%. 
     When the brightness of the HDR video is adjusted, as illustrated at the end of arrow #302, the reproduction device  2  rewrites the HDR information. The HDR information after the rewriting becomes information representing the brightness characteristic of the HDR video on which the adjustment of the brightness has been performed. 
     As illustrated at the end of arrow #303, the reproduction device  2  adds the HDR information to the data of the HDR video on which the adjustment of the brightness has been performed and, as illustrated at the end of arrow #304, outputs the data to the display device  3 . 
     [Signal Processing in Mode-ii] 
       FIG. 42  is a diagram illustrating an example of signal processing in mode-ii in a case in which the adjustment of the brightness of the HDR video is performed by the reproduction device  2 . 
     Among the processing illustrated in  FIG. 42 , the processing performed by the recording device  1  and the processing related to the output of the STD video performed by the reproduction device  2  are the same as the processing described while referring to  FIG. 4 . Redundant descriptions will be appropriately omitted. 
     The reproduction device  2  reads out the HEVC stream from the optical disc  11  and, as illustrated at the ends of arrows #101 and #102, extracts the HDR information and the tone mapping definition information from the SEI of the HEVC stream. 
     Furthermore, as illustrated at the end of arrow #103, the reproduction device decodes the coded data of the HEVC. As illustrated at the end of arrow #105, when the display device  3  includes an HDR monitor, the reproduction device  2  converts the STD video, which has been obtained by decoding the coded data, to an HDR video by using the tone mapping definition information for STD-HDR conversion extracted from the HEVC stream. 
     As illustrated at the end of arrow #311, when the display device  3  includes an HDR monitor but cannot display the HDR video as it is, the reproduction device  2  adjusts the brightness of the HDR video and as illustrated at the end of arrow #312, rewrites the HDR information. 
     As illustrated at the end of arrow #313, the reproduction device  2  adds the HDR information to the data of the HDR video on which the adjustment of the brightness has been performed and, as illustrated at the end of arrow #314, outputs the data to the display device  3 . 
     As described above, when the adjustment of the brightness of the HDR video is performed by the reproduction device  2 , the HDR information is rewritten so as to represent the brightness characteristic after the adjustment and is transmitted together with the data of the HDR video to the display device  3 . 
     On the basis of the HDR information, the display device  3  recognizes that the HDR video is going to be transmitted, and the display device  3  is capable of displaying the image of the HDR video on the monitor  104  in accordance with the brightness designated by the HDR information after the rewriting. 
     [Configuration of Reproduction Device  2 ] 
       FIG. 43  is a block diagram illustrating an exemplary configuration of the HDR video output unit  75 A in  FIG. 25 . 
     The HDR video output unit  75 A includes a brightness adjustment unit  11  and a rewriting unit  112 . The HDR video supplied from the HEVC decoder  72  or the STD-HDR conversion unit  74  is input to the brightness adjustment unit  111 . Furthermore, the HDR information supplied from the parameter extraction unit  71  is input to the rewriting unit  112 . 
     The brightness adjustment unit  11  adjusts the brightness of the HDR video and outputs the HDR video on which the adjustment of the brightness has been performed. 
     On the basis of the result of the adjustment by the brightness adjustment unit  111 , the rewriting unit  112  rewrites the HDR information so as to represent the brightness characteristic on which the adjustment has been performed. The HDR information that has been rewritten is added to the HDR video on which the adjustment of the brightness has been performed and is transmitted to the display device  3 . 
     [Decoding Processing of Reproduction Device  2 ] 
     Herein, referring to the flowchart in  FIG. 44 , the decoding processing in mode-i performed in step S 44  in  FIG. 31  will be described. In the processing in  FIG. 44 , the adjustment of the brightness of the HDR video is appropriately performed. 
     Among the processing illustrated in  FIG. 44 , the processing of steps S 151  to S 153  and S 158  to S 160  is the same as the processing of steps S 61  to S 63  and S 65  to S 67  of  FIG. 32 , respectively. Redundant descriptions will be appropriately omitted. 
     In step S 151 , the parameter extraction unit  71  of the decoding processing unit  56  extracts HDR information and tone mapping definition information from the SEI of the HEVC stream. 
     In step S 152 , the HEVC decoder  72  decodes the coded data of the HEVC and outputs the HDR video obtained by the decoding. 
     In step S 153 , the controller  51  determines whether the monitor included in the display device  3  is an HDR monitor. 
     When it is determined in step S 153  that the monitor included in the display device  3  is an HDR monitor, in step S 154 , the controller  51  determines whether the HDR video can be displayed as it is on the monitor  104  of the display device  3 . 
     When it is determined in step S 154  that the HDR video cannot be displayed as it is, in step S 155 , the brightness adjustment unit  111  of the HDR video output unit  75 A adjusts, in accordance with the display performance of the monitor  104 , the brightness of the HDR video that has been decoded by the HEVC decoder  72 . 
     In step S 156 , the rewriting unit  112  performs rewriting of the HDR information on the basis of the result of the adjustment of the brightness. 
     In step S 157 , the HDR video output unit  75 A outputs the HDR video, on which adjustment of the brightness has been performed, together with the HDR information, which has been rewritten. 
     When it is determined in step S 154  that the HDR video can be displayed as it is, the processing of steps S 155  and S 156  is skipped. In the above case, in step S 157 , the HDR video output unit  75 A outputs the HDR video, which has been decoded by the HEVC decoder  72 , together with the HDR information, which has been extracted by the parameter extraction unit  71 . 
     Determination of whether the reproduction is to be ended is made in step S 160 , and when determination is made that the reproduction is to be ended, the processing is ended. Subsequently, the process returns to step S 44  in  FIG. 31  and the processing thereafter is performed. 
     Referring next to the flowchart in  FIG. 45 , the decoding processing in mode-ii performed in step S 45  in  FIG. 31  will be described. In the processing in  FIG. 45 , the adjustment of the brightness of the HDR video is appropriately performed. 
     Among the processing illustrated in  FIG. 45 , the processing of steps S 171  to S 174 , S 179 , and S 180  is the same as the processing of steps S 81  to S 84 , S 86 , and S 87  of  FIG. 33 , respectively. Redundant descriptions will be appropriately omitted. 
     In step S 171 , the parameter extraction unit  71  of the decoding processing unit  56  extracts HDR, information and tone mapping definition information from the SEI of the HEVC stream. 
     In step S 172 , the HEVC decoder  72  decodes the coded data of the HEVC and outputs the STD video obtained by the decoding. 
     In step S 173 , the controller  51  determines whether the monitor included in the display device  3  is an HDR monitor. 
     When it is determined that the monitor included in the display device  3  is an HDR monitor in step S 173 , in step S 174 , the STD-HDR conversion unit  74  converts the decoded STD video to an HDR video on the basis of the tone mapping definition information for STD-HDR conversion. 
     In step S 175 , the controller  51  determines whether the HDR video obtained by converting the STD video can be displayed as it is on the monitor  104  of the display device  3 . 
     When it is determined in step S 175  that the HDR video cannot be displayed as it is, in step S 176 , the brightness adjustment unit  111  of the HDR video output unit  75 A adjusts, in accordance with the display performance of the monitor  104 , the brightness of the HDR video that has been obtained by converting the STD video. 
     In step S 177 , the rewriting unit  112  performs rewriting of the HDR information on the basis of the result of the adjustment of the brightness. 
     In step S 178 , the HDR video output unit  75 A outputs the HDR video, on which adjustment of the brightness has been performed, together with the HDR information, which has been rewritten. 
     When it is determined in step S 175  that the HDR video can be displayed as it is, the processing of steps S 176  and S 177  is skipped. In the above case, in step S 178 , the HDR video output unit  75 A outputs the HDR video, which has been obtained by converting the STD video, together with the HDR information, which has been extracted by the parameter extraction unit  71 . 
     Determination of whether the reproduction is to be ended is made in step S 80 , and when determination is made to end the reproduction, the processing is ended. Subsequently, the process returns to step S 45  in  FIG. 31  and the processing thereafter is performed. 
     [Display Processing of Display Device  3 ] 
     Referring next to the flowchart in  FIG. 46 , display processing of the display device  3  will be described. 
     The processing in  FIG. 46  is performed after the processing in  FIG. 44  or  FIG. 45  performed by the reproduction device  2 . Together with the HDR information, the original HDR video on which no adjustment of the brightness has been performed or the HDR video on which adjustment of the brightness has been performed are transmitted from the reproduction device  2  to the display device  3  including an HDR monitor. 
     In step S 191 , the HDMI communication unit  102  of the display device  3  receives the HDR video and the HDR information transmitted from the reproduction device  2 . 
     In step S 192 , the signal processing unit  103  displays an image of the HDR video on the monitor  104  in accordance with the brightness designated by the HDR information. 
     In step S 193 , the controller  101  determines whether the display is to be ended and when it is determined that the display is not to be ended, processing from step S 191  and after is repeated. When determination is made to end the display in step S 193 , the controller  101  ends the processing. 
     As described above, when the adjustment of the brightness is performed by the reproduction device  2 , the display device  3  does not have to determine whether the HDR video that has been sent from the reproduction device  2  can be displayed as it is. Furthermore, the display device  3  itself does not have to adjust the brightness of the HDR video. 
     When the adjustment of the brightness of the HDR video is required, the user of the reproduction device  2  may be allowed to set whether to perform the adjustment of the brightness on the reproduction device  2  side or on the display device  3  side. 
     Alternatively, the display device  3  may notify the reproduction device  2  whether the adjustment of the brightness is performed on the reproduction device  2  side or on the display device  3  side, and in accordance with the notification, the processing that is performed in the reproduction device  2  may be switched. For example, when the display device  3  has a function of adjusting the brightness of the HDR video, a notification is made that the adjustment of the brightness is to be performed on the display device  3  side, and when the display device  3  has no function of adjusting the brightness of the HDR video, a notification is made that the adjustment of the brightness is to be performed on the reproduction device  2  side. 
     When notified from the display device  3  that the adjustment of the brightness is to be performed on the reproduction device  2  side, the reproduction device  2  performs, as the decoding processing, the processing in  FIG. 44  or  FIG. 45 . Furthermore, when notified from the display device  3  that the adjustment of the brightness is to be performed on the display device  3  side, the reproduction device  2  performs, as the decoding processing, the processing in  FIG. 32  or  FIG. 33 . 
     There are cases in which the parameters used in the adjustments are different between the adjustment of the brightness performed by the reproduction device  2  and the adjustment of the brightness performed by the display device  3 . In the above case, it is considered that, from the viewpoint of image quality, it is desirable that the adjustment of the brightness is performed by the display device  3  that includes the monitor  104  and that is capable of performing adjustment that suits the characteristic of the monitor  104  in a greater manner. 
     By having the display device  3  select whether to perform the adjustment of the brightness on the reproduction device  2  side or on the display device  3  side, it will be possible to display the HDR video with a fine image quality. It is possible to perform the selection between performing the adjustment of the brightness on the reproduction device  2  side or on the display device  3  side on the basis of an user operation. For example, when the user instructs display of the menu screen by operating a remote control or a button provided on a body of the display device  3 , the controller  101  of the display device  3  controls, for example, the signal processing unit  103  such that the menu screen including items related to the configuration of the HDR video is displayed on the monitor  104 . When an item related to the configuration of the HDR video is selected, a screen used for selecting whether to perform the adjustment of the brightness on the reproduction device  2  side or on the display device  3  side is displayed, and the user will be selecting either one. By transmitting the information representing the selected content of the user to the reproduction device  2  through the HDMI cable  4 , the display device  3  notifies whether to perform the adjustment of the brightness of the HDR video on the reproduction device  2  side or on the display device  3  side to the reproduction device  2 . 
     The notification of whether to perform the adjustment of the brightness of the HDR video on the reproduction device  2  side or on the display device  3  side can be achieved by using the EDID of the HDMI. 
     &lt;8. Exemplary Application to HDMI&gt; 
     [HDR EDID and HDR InfoFrame] 
       FIG. 47  is a diagram illustrating an example of a recognition on the basis of information transmitted and received through the HDMI. 
     As illustrated on the left side in  FIG. 47 , the reproduction device  2  that is a BD player supporting processing of an HDR video with a 4K resolution reads out the EDIDs that are stored in the memory  101 A of the display device  3 . A plurality of EDIDs, such as an EDID representing the performance of the monitor  104  of the display device  3 , are stored in the memory  101 A of the display device  3 . 
     When an HDR EDID is included in the EDIDs read out from the display device  3 , the reproduction device  2  recognizes that the display device  3  is a device including an HDR monitor and that an HDR video can be output to the display device  3 . The HDR EDID includes information related to the output of the HDR video. A notification of whether to perform the adjustment of the brightness of the HDR video on the reproduction device  2  side or on the display device  3  side is performed using the HDR EDID. 
     As illustrated on the right side in  FIG. 47 , the reproduction device  2  adds HDR InfoFrame to the data of each frame of the HDR video output to the display device  3 . In the HDMI standard, Info Frame is added to each frame of the video. Information related to the specification of the video, such as information on whether the video data is of an RGB data or of an YCbCr data, information representing the aspect ratio, and the like is included in the InfoFrame of the video. 
     The HDR InfoFrame is an InfoFrame including the information relating to the specification of the HDR video. Transmission of the HDR information representing the brightness characteristic of the HDR video is performed using the HDR InfoFrame. The reproduction device  2  outputs the data of the HDR video, to which the HDR InfoFrame has been added, to the display device  3 . 
     When the HDR InfoFrame is added to the video data that has been transmitted from the reproduction device  2 , the display device  3  recognizes that the video data transmitted from the reproduction device  2  is data of an HDR video. Subsequently, the display device  3  displays an image of the HDR video on the HDR monitor. 
       FIG. 48  is a diagram illustrating another example of a recognition on the basis of information transmitted and received through the HDMI. 
     As illustrated on the left side in  FIG. 48 , when an HDR EDID is not included in the EDIDs read out from the display device  3 , the reproduction device  2  recognizes that the display device  3  is a device that does not include an HDR monitor. In such a case, the reproduction device  2  will be outputting only the data of the STD video to the display device  3 . No HDR InfoFrame is added to the data of the STD video that the reproduction device  2  outputs. 
     On the other hand, as illustrated on the right side in  FIG. 48 , when no HDR InfoFrame is added to the video data that has been transmitted from the reproduction device  2 , the display device  3  recognizes that the video data transmitted from the reproduction device  2  is data of an STD video. Subsequently, the display device  3  displays an image of the STD video on the STD monitor. 
     As described above, transmission of the HDR information from the reproduction device  2  to the display device  3  can be performed using the InfoFrame of the HDMI. Furthermore, the notification from the display device  3  to the reproduction device  2  on whether to perform the adjustment of the brightness of the HDR video on the reproduction device  2  side or on the display device  3  side can be performed using the EDID of the HDMI. 
       FIG. 49  is a diagram illustrating an example of the HDR EDID. 
     Information representing the maximum brightness of the monitor, information representing the maximum extension level, and raw/cooked flag-1 are included in the HDR EDID. The raw/cooked flag-1 represents whether to output the HDR video in a raw manner or to output the HDR video after, if needed, adjusting the brightness of the HDR video. 
     The value of the raw/cooked flag-1 being 1 represents that the HDR video is to be output in a raw manner, in other words, it represents that the display device  3  is requesting the HDR video to be output without performing any adjustment of the brightness on the reproduction device  2  side. When the value of the raw/cooked 20 flag-1 is 1, even if the dynamic range of the HDR video exceeds the display performance of the monitor  104 , the reproduction device  2  outputs the HDR video without performing any adjustment of the brightness. 
     For example, if provided with a function for adjusting the brightness of the HDR video, the display device  3  sets the value of the raw/cooked flag-1 to 1. 
     Furthermore, the value of the raw/cooked flag-1 being 0 represents that the display device  3  is requesting the HDR video to be output after, if required, performing adjustment of the brightness of the HDR video on the reproduction device  2  side. When the value of the raw/cooked flag-1 is 0 and when the dynamic range of the HDR video exceeds the display performance of the monitor  104 , the reproduction device  2  adjusts the brightness of the HDR video in accordance with the display performance of the monitor  104  and outputs the HDR video on which the adjustment has been performed. 
     For example, if not provided with any function for adjusting the brightness of the HDR video, the display device  3  sets the value of the raw/cooked flag-1 to 0. 
     The decoding processing in  FIG. 32  or  FIG. 33 , in which the adjustment of the brightness is not performed on the reproduction device  2  side but is performed on the display device  3  side, corresponds to the processing in which the value of the raw/cooked flag-1 is 1. Furthermore, the decoding processing in  FIG. 44  or  FIG. 45 , in which the adjustment of the brightness is performed on the reproduction device  2  side, corresponds to the processing in which the value of the raw/cooked flag-1 is 0. 
     Hereinafter, as appropriate, the output in which the reproduction device  2  outputs the HDR video in a raw manner is referred to as a raw output. Furthermore, the output after the reproduction device  2  has, if required, performed adjustment of the brightness of the HDR video is referred to as a cooked output. 
       FIG. 50  is a diagram illustrating an example of the HDR InfoFrame. 
     The HDR InfoFrame includes ref_screen_luminance_white, extended_range_white_level, nominal_black_level_code_value, nominal_white_level_code_value, extended white level code value and raw/cooked flag-2 that are parameters of the HDR information. 
     Furthermore, the HDR InfoFrame includes raw/cooked flag-2, as well. The raw/cooked flag-2 represents whether the HDR video that is output is a raw HDR video on which no adjustment of the brightness has been performed or is an HDR video on which the adjustment of the brightness has been performed. 
     The value of the raw/cooked flag-2 being 1 represents that the HDR video that is output is a raw HDR video on which no adjustment of the brightness has been performed on the reproduction device  2  side. For example, when the value of the raw/cooked flag-1 included in the HDR EDID is 1, the reproduction device  2  adds the HDR InfoFrame in which the value of the raw/cooked flag-2 is set to 1 to the data of the HDR video and outputs the data of the HDR video. 
     Furthermore, the value of the raw/cooked flag-2 being 0 represents that the HDR video that is output is an HDR video on which the adjustment of the brightness has been performed. For example, when the value of the raw/cooked flag-1 included in the HDR EDID is 0 and the dynamic range of the HDR video exceeds the display performance of the monitor  104 , the reproduction device  2  performs adjustment of the brightness and sets the value of the raw/cooked flag-2 to 0. The reproduction device  2  adds the HDR InfoFrame in which the value of the raw/cooked flag-2 is set to 0 to the data of the HDR video on which adjustment of the brightness has been performed and outputs the data of the HDR video. 
     In the decoding processing in  FIG. 32  or  FIG. 33  in which the adjustment of the brightness is not performed on the reproduction device  2  side, the value of the raw/cooked flag-2 of the HDR InfoFrame is set to 1. Furthermore, in the decoding processing in  FIG. 44  or  FIG. 45  in which the adjustment of the brightness is, in some cases, performed on the reproduction device  2  side, the value of the raw/cooked flag-2 of the HDR Info Frame may, in some cases, be set to 0. 
     [Processing of Reproduction Device  2  and Display Device  3 ] 
     Herein, processing of the reproduction device  2  and the display device  3  in which the HDR EDID and the HDR InfoFrame are used will be described. 
     Referring first to the flowchart in  FIG. 51 , processing of the display device  3  that sets the HDR EDID will be described. 
     In step S 211 , the controller  101  of the display device  3  sets the value of the raw/cooked flag-1 to 1 or 0, and stores, in the memory  101 A, the HDR EDID that includes the information representing the maximum brightness of the monitor, the information representing the maximum extension level, and the raw/cooked flag-1. 
     In step S 212 , in accordance with the request from the reproduction device  2 , the HDMI communication unit  102  reads out a plurality of EDIDs including the HDR EDID from the memory  101 A and transmits the plurality of EDIDs to the reproduction device  2 . 
     Referring next to the flowchart in  FIG. 52 , the reproduction processing of the reproduction device  2  will be described next. For example, the processing in  FIG. 52  is started after the processing in  FIG. 51  has been performed in the display device  3 . 
     In step S 221 , the controller  51  controls the disc drive  52  and reads out the PlayList and the Clip Information that are Data Base information from the optical disc  11 . Furthermore, on the basis of the information included in the PlayList, the controller  51  specifies the HEVC stream to be reproduced and controls the disc drive  52  to read out the AV stream including the specified HEVC stream from the optical disc  11 . 
     In step S 222 , the controller  51  refers to the HDR_flag and the mode_flag included in the Clip information, in the present example, the HDR_flag is set with a value that represents that recording of the HDR video as a master is being performed. 
     In step S 223 , the controller  51  controls the HDMI communication unit  58  and reads out the EDIDs from the display device  3 . A request to read out the EDIDs is made to the HDMI communication unit  102  of the reproduction device  2  from the HDMI communication unit  58 , and the plurality of ED IDs that have been transmitted in response to the request are acquired by the HDMI communication unit  58 . 
     In step S 224 , the controller  51  determines whether an HDR EDID is included in the EDIDs that have been read out from the display device  3 . 
     When it is determined in step S 224  that an HDR EDID is included, the controller  51  recognizes that an HDR video can be output to the display device  3  and in step S 225 , stores the information representing the display performance of the monitor  104  in the register  53 A. For example, the controller  51  stores, in the PSR25, information representing the maximum brightness of the monitor and the information representing the maximum extension level that are included in the HDR EDID and that serve as information representing the brightness specification of the monitor. Furthermore, the controller  51  sets a value representing that the monitor  104  is capable of displaying an HDR video in the HDR_display_capability_flag of the PSR25. 
     In step S 226 , the controller  51  determines whether a raw output is requested from the display device  3  on the basis of the raw/cooked flag-1 included in the HDR EDID, in the case of the example described above, when the value of the raw/cooked flag-1 is 1, the controller  51  determines that a raw output is requested, and when 0, determines that, a cooked output is requested. 
     When it is determined in step S 226  that the raw output is requested, in step S 227 , the controller  51  performs HDR/raw output processing that is processing that performs a raw output of the HDR video. 
     When it is determined in step S 226  that the raw output is not requested, in step S 228 , the controller  51  performs HDR/cooked output processing that is processing that performs a cooked output of the HDR video. 
     On the other hand, when it is determined in step S 224  that the HDR EDID is not included, in step S 229 , the controller  51  performs STD output processing that is processing that performs output of an STD video. The output destination of the STD video with the STD output processing will be a display device that is different from the display device  3  and that does not include an HDR monitor. 
     After the video data is output in step S 227 , S 228 , or S 229 , the process is ended. 
     Referring next to the flowchart in  FIG. 53 , the HDR/raw output processing performed in step S 227  in  FIG. 52  will be described. 
     In step S 241 , the parameter extraction unit  71  of the decoding processing unit  56  extracts HDR information and tone mapping definition information from the SE of the HEVC stream. The parameter extraction unit  71  outputs the coded data of the HEVC included in the HEVC stream to the HEVC decoder  72 . 
     In step S 242 , the HEVC decoder  72  decodes the coded data of the HEVC. When the recording mode 1s mode-i, the data of the HDR video obtained by decoding the coded data 1s supplied to the HDR video output unit  75 A. Furthermore, when the recording mode is mode-ii, the data of the STD video obtained by decoding the coded data is supplied to the STD-HDR conversion unit  74 . 
     In step S 243 , the controller  51  determines whether the recording mode is mode-i on the basis of the value of the mode_flag. 
     When it is determined that the recording mode is mode-ii in step S 243 , in step S 244 , the STD-HDR conversion unit  74  converts the STD video supplied from the HEVC decoder  72  to an HDR video on the basis of the tone mapping definition information for STD-HDR conversion supplied from the parameter extraction unit  71 . When it is determined in step S 243  that the recording mode is mode-i, the processing of step S 244  is skipped. 
     In step S 245 , the HDR video output unit  75 A sets the raw/cooked flag-2 to a value of 1 that represents that the HDR video is a raw HDR video in which no adjustment of the brightness has been performed. Furthermore, the HDR video output unit  75 A generates an HDR InfoFrame that includes each parameter of the HDR information, which has been extracted by the parameter extraction unit  71 , and the raw/cooked flag-2. 
     In step S 246 , the HDR video output unit  75 A adds the HDR InfoFrame to the data of each frame of the HDR video and outputs the data to the display device  3 . 
     In step S 247 , the controller  51  determines whether the reproduction is to be ended and when it is determined that the reproduction is not to be ended, the process returns to step S 241  and the above processing is executed repeatedly. When it is determined in step S 247  that the reproduction is to be ended, the process returns to step S 227  in  FIG. 52  and the processing thereafter is performed. 
     Referring next to the flowchart in  FIG. 54 , the HDR/cooked output processing performed in step S 228  in  FIG. 52  will be described. 
     In step S 261 , the parameter extraction unit  71  of the decoding processing unit  56  extracts HDR information and tone mapping definition information from the SEI of the HEVC stream. The parameter extraction unit  71  outputs the coded data of the HEVC included in the HEVC stream to the HEVC decoder  72 . 
     In step S 262 , the HEVC decoder  72  decodes the coded data of the HEVC. When the recording mode is mode-i, the data of the HDR video obtained by decoding the coded data is supplied to the HDR video output unit  75 A.  30  Furthermore, when the recording mode is mode-ii, the data of the STD video obtained by decoding the coded data is supplied to the STD-HDR conversion unit  74 . 
     In step S 263 , the controller  51  determines whether the recording mode is mode-i on the basis of the value of the mode_flag. 
     When it is determined that the recording mode is mode-ii in step S 263 , in step S 264 , the STD-HDR conversion unit  74  converts the STD video supplied from the HEVC decoder  72  to an HDR video on the basis of the tone mapping definition information for STD-HDR conversion supplied from the parameter extraction unit  71 . When it is determined in step S 263  that the recording mode is mode-i, the processing of step S 264  is skipped. 
     In step S 265 , the controller  51  compares the brightness characteristic of the HDR video represented by the HDR information and the performance of the monitor represented by the information included in the HDR EDID with each other and determines whether the HDR video can be displayed on the monitor  104  as it is. 
     When it is determined in step S 265  that the HDR video cannot be displayed as it is, in step S 266 , the brightness adjustment unit  111  of the HDR video output unit  75 A adjusts the brightness of the HDR video in accordance with the display performance of the monitor  104 . 
     In step S 267 , the rewriting unit  112  performs rewriting of the HDR information on the basis of the result of the adjustment of the brightness. When it is determined in step S 265  that the HDR video can be displayed as it is, the processing of steps S 266  and S 267  is skipped. 
     In step S 268 , the HDR video output unit  75 A sets a predetermined value to the raw/cooked flag-2 and generates an HDR InfoFrame including each parameter of the HDR information. 
     For example, when the brightness of the HDR video is not adjusted, the HDR video output unit  75 A sets the value to 1 that represents the above to the raw/cooked flag-2 and generates the HDR InfoFrame including the raw/cooked lag-2 and each parameter of the HDR information that has been extracted by the parameter extraction unit  71 . 
     On the other hand, when the brightness of the HDR video is adjusted, the HDR video output unit  75 A sets the value to 0 that represents the above to the raw/cooked flag-2 and generates the HDR InfoFrame including the raw/cooked flag-2 and each parameter of the HDR information on which rewriting has been performed. 
     In step S 269 , the HDR video output unit  75 A adds the HDR InfoFrame to the data of each frame of the HDR video and outputs the data to the display device  3 . 
     In step S 270 , the controller  51  determines whether the reproduction is to be ended and when it is determined that the reproduction is not to be ended, the process returns to step S 261  and the above processing is executed repeatedly. When it is determined in step S 270  that the reproduction is to be ended, the process returns to step S 228  in  FIG. 52  and the processing thereafter is performed. 
     Referring next to the flowchart in  FIG. 55 , the STD output processing performed in step S 229  in  FIG. 52  will be described. 
     As described above, the processing in  FIG. 55  is processing in which the video data is output to the display device that is different from the display device  3  and that does not include an HDR monitor. 
     In step S 281 , the parameter extraction unit  71  of the decoding processing unit  56  extracts HDR information and tone mapping definition information from the SEI of the HEVC stream. The parameter extraction unit  71  outputs the coded data of the HEVC included in the HEVC stream to the HEVC decoder  72 . 
     In step S 282 , the HEVC decoder  72  decodes the coded data of the HEVC. When the recording mode is mode-i, the data of the HDR video obtained by decoding the coded data is supplied to the HDR-STD conversion unit  73 . Furthermore, when the recording mode is mode-ii, the data of the STD video obtained by decoding the coded data is supplied to the STD video output unit  75 B. 
     In step S 283 , the controller  51  determines whether the recording mode is mode-i on the basis of the value of the mode_flag. 
     When it is determined that the recording mode is mode-i in step S 283 , in step S 284 , the HDR-STD conversion unit  73  converts the HDR video supplied from the HEVC decoder  72  to an STD video on the basis of the tone mapping definition information for HDR-STD conversion supplied from the parameter extraction unit  71 . When it is determined in step S 283  that the recording mode is mode-ii, the processing of step S 284  is skipped. 
     In step S 285 , the STD video output unit  751  outputs the STD video supplied from the HEVC decoder  72  or the STD video supplied from the HDR-STD conversion unit  73 . 
     In step S 286 , the controller  51  determines whether the reproduction is to be ended and when it is determined that the reproduction is not to be ended, the process returns to step S 281  and the above processing is executed repeatedly. When it is determined in step S 286  that the reproduction is to be ended, the process returns to step S 229  in  FIG. 52  and the processing thereafter is performed. 
     Referring next to the flowchart in  FIG. 56 , display processing of the display device  3  will be described. 
     HDR InfoFrame is added to the video data transmitted by the reproduction device  2  to the display device  3  including an HDR monitor. On the basis of the HDR InfoFrame, the controller  101  of the display device  3  recognizes that the video data transmitted from the reproduction device  2  is data of an HDR video. 
     In step S 301 , the HDMI communication unit  102  of the display device  3  receives the data of the HDR video transmitted from the reproduction device  2 . HDR InfoFrame is added to the data of each frame of the HDR video. 
     In step S 302 , on the basis of the raw/cooked flag-2 included in the HDR InfoFrame, the controller  101  determines whether the data of the HDR video is data on which raw output has been performed. 
     When 1 is set as the value of the raw/cooked flag-2, the controller  101  determines that the data of the HDR video is data on which raw output has been performed. Furthermore, when 0 is set as the value of the raw/cooked flag-2, the controller  101  determines that the data of the HDR video is data on which cooked output has been performed. 
     When it is determined in step S 302  that the data of the HDR video is data on which raw output has been performed, in step S 303 , the signal processing unit  103  refers to the HDR information included in the HDR InfoFrame. When the dynamic range of the HDR video exceeds the display performance of the monitor  104 , the signal processing unit  103  adjusts the brightness of the HDR video as appropriate and displays, on the monitor  104 , the image of the HDR video on which adjustment has been performed. 
     On the other hand, when it is determined in step S 302  that the data of the HDR video is data on which cooked output has been performed, in step S 304 , the signal processing unit  103  displays the image of the HDR video on the monitor  104  in accordance with the HDR information included in the InfoFrame. 
     After the image of the HDR video has been displayed in step S 303  or in step S 304 , in step S 305 , the controller  101  determines whether the display of the HDR video is to be ended and when it is determined not to end the display, processing from step S 301  and after is repeated. When determination is made to end the display in step S 305 , the controller  101  ends the processing. 
     With the above-described sequential processing, the reproduction device  2  is capable of transmitting HDR information to the display device  3  by using the InfoFrame of the HDMI. Furthermore, by using the EDID of the HDMI the display device  3  is capable of requesting on which side, that is, the reproduction device  2  side or the display device  3  side, the adjustment of the brightness of the HDR video is to be performed. 
     &lt;9. Other Modifications&gt; 
     Although the HDR information is added when transmitting the data of the HDR video from the reproduction device  2  to the display device  3 , transmission may be performed without the addition of the HDR information. 
     Furthermore, a description has been given mainly of a case in which the reproduction device  2  is a BD player; however, a portable terminal may be equipped with the functions described above included in the reproduction device  2 . In such a case, the portable terminal will be having the role as the reproduction device  2 . 
     Furthermore, while the content that the reproduction device  2  reproduces is content that is recorded in a removable media, the above-described technology is applicable to a case in which the content distributed through a network is reproduced. In such a case, the reproduction device  2  receives content that has been transmitted from a server that is connected to a network such as the Internet and reproduces the content such that an HDR video is output to the display device  3 . 
     [Exemplary Configuration of the Computer] 
     The sequential processing described above may be implemented by hardware or may be implemented by software. When implementing the sequential processing by software, a program constituting the software is installed from a program recording medium to a computer built into a dedicated hardware, a general-use personal computer, or the like. 
       FIG. 57  is a block diagram illustrating an exemplary hardware configuration of a computer that executes the sequential processing described above with a program. 
     A CPU  501 , a ROM  502 , and a RAM  503  are interconnected with a bus  504 . 
     Furthermore, an input/output interface  505  is connected to the bus  504 . An input unit  506  including a keyboard and a mouse and an output unit  507  including a loudspeaker are connected to the input/output interface  505 . Furthermore, a storage unit  508  including a hard disk or a nonvolatile memory, a communication unit  509  including a network interface, and a drive  510  that drives the removable media  511  are connected to the input/output interface  505 . 
     In the computer configured in the above manner, the sequential processing described above is performed by, for example, the CPU  501  loading the program stored in the storage unit  508  onto the RAM  503  through the input/output interface  505  and the bus  504  and executing the program. 
     The program executed by the CPU  501  is provided by recording the program in a removable media  511  for example, or through a wired or wireless transmission medium, such as a local area network, the Internet, digital broadcast, or the like, and is installed in the storage unit  508 . 
     Note that the program executed by the computer may be a program in which the processing is performed in time sequence in the order described in the present description or may be program in which the processing is performed in a parallel manner or at a required timing such as when called. 
     The embodiment of the present technology is not limited to the above-described embodiment and various modifications can be made without departing from the scope of the present technology. 
     Note that in the present description, a system refers to an assembly of a plurality of components (a device, a module (parts), and the like) regardless of whether all of the components are in the same housing or not. Accordingly, a plurality of devices that are housed in different housings and that are connected to each other through a network, and a single device in which a plurality of modules are housed in a single housing are both a system. 
     [Exemplary Combination of Configurations] 
     The present technology can be configured in the following manner as well. 
     (1) 
     A reproduction device, including: 
     a readout unit configured to read out, from a recording medium that has recorded coded data of an extended video that is a video having a second brightness range that is wider than a first brightness range, brightness characteristic information that represents a brightness characteristic of the extended video, and brightness conversion definition information used when performing a brightness conversion of the extended video to a standard video that is a video having the first brightness range, the coded data, the brightness characteristic information, and the brightness conversion definition information; 
     a decoding unit configured to decode the coded data; 
     a conversion unit configured to convert the extended video obtained by decoding the coded data to the standard video on a basis of the brightness conversion definition information; and 
     a communication unit configured to acquire, from a display device that is to be an output destination of a video, performance information that is information representing a performance of the display device, to output data of the extended video after adding frame information including the brightness characteristic information to frame data when the performance information includes information representing a display performance of the extended video, and to output data of the standard video when the performance information includes no information representing the display performance of the extended video. 
     (2) 
     The reproduction device according to (1), 
     wherein the information representing the display performance of the extended video includes a first flag that represents whether to output the extended video without adjusting a brightness of the extended video or to output the extended video after adjusting the brightness of the extended video, and 
     wherein the communication unit changes the extended video to be output according to a value of the first flag. 
     (3) 
     The reproduction device according to (2), 
     wherein when the extended video on which an adjustment of the brightness has been performed is output, the communication unit outputs the data of the extended video in which the frame information including the brightness characteristic information representing the brightness characteristic after the adjustment is added to the frame data. 
     (4) 
     The reproduction device according to (3), 
     wherein the frame information includes a second flag that represents whether the extended video to be output is a video on which no adjustment of the brightness has been performed or is a video on which an adjustment of the brightness has been performed. 
     (5) 
     The reproduction device according to any of (1) to (4), 
     wherein the communication unit performs communication with the display device in accordance with an HDMI standard to acquire an EDID serving as the performance information from the display device, and outputs the data of the extended video in which an InfoFrame serving as the frame information is added to the frame data. 
     (6) 
     The reproduction device according to any of (1) to (5), 
     wherein the coded data is coded data of an HEVC, and the brightness characteristic information and the brightness conversion definition information are each an SEI of an HEVC stream. 
     (7) 
     A reproduction method including: 
     a step of reading out, from a recording medium that has recorded coded data of an extended video that is a video having a second brightness range that is wider than a first brightness range, brightness characteristic information that represents a brightness characteristic of the extended video, and brightness conversion definition information used when performing a brightness conversion of the extended video to a standard video that is a video having the first brightness range, the coded data, the brightness characteristic information, and the brightness conversion definition information; 
     a step of decoding the coded data; 
     a step of converting the extended video obtained by decoding the coded data to the standard video on a basis of the brightness conversion definition information; 
     a step of acquiring, from a display device that is to be an output destination of a video, performance information that is information representing a performance of the display device; 
     a step of outputting data of the extended video after adding frame information including the brightness characteristic information to frame data when the performance information includes information representing a display performance of the extended video; and 
     a step of outputting data of the standard video when the performance information includes no information representing the display performance of the extended video. 
     (8) 
     A recording medium, 
     wherein 
     coded data of an extended video that is a video having a second brightness range that is wider than a first brightness range, 
     brightness characteristic information that represents a brightness characteristic of the extended video, and 
     brightness conversion definition information used when performing a brightness conversion of the extended video to a standard video that is a video having the first brightness range are recorded, and 
     wherein a reproduction device that reproduces the recording medium executes processing of reading out the coded data, the brightness characteristic information, and the brightness conversion definition information from the recording medium, 
     decoding the coded data, 
     converting the extended video obtained by decoding the coded data to the standard video on a basis of the brightness conversion definition information, 
     acquiring, from a display device that is to be an output destination of a video, performance information that is information representing a performance of the display device. 
     outputting data of the extended video after adding frame information including the brightness characteristic information to frame data when the performance information includes information representing a display performance of the extended video, and 
     outputting data of the standard video when the performance information includes no information representing the display performance of the extended video. 
     (9) 
     A reproduction device, including: 
     a readout unit configured to read out, from a recording medium that has recorded coded data of a standard video that is obtained by performing a brightness conversion of an extended video that is a video having a second brightness range that is wider than a first brightness range, the standard video being a video having the first brightness range, brightness characteristic information that represents a brightness characteristic of the extended video, and brightness conversion definition information used when performing the brightness conversion of the standard video to the extended video, the coded data, the brightness characteristic information, and the brightness conversion definition information; 
     a decoding unit configured to decode the coded data; 
     a conversion unit configured to convert the standard video obtained by decoding the coded data to the extended video on a basis of the brightness conversion definition information; and 
     a communication unit configured to acquire, from a display device that is to be an output destination of a video, performance information that is information representing a performance of the display device, to output data of the extended video after adding frame information including the brightness characteristic information to frame data when the performance information includes information representing a display performance of the extended video, and to output data of the standard video when the performance information includes no information representing the display performance of the extended video. 
     (10) 
     The reproduction device according to (9), 
     wherein the information representing the display performance of the extended video includes a first flag that represents whether to output the extended video without adjusting a brightness of the extended video or to output the extended video after adjusting the brightness of the extended video, and 
     wherein the communication unit changes the extended video to be output according to a value of the first flag. 
     (11) 
     The reproduction device according to (10), 
     wherein when the extended video on which an adjustment of the brightness has been performed is output, the communication unit outputs the data of the extended video in which frame information including the brightness characteristic information representing the brightness characteristic after the adjustment is added to the frame data. 
     (12) 
     The reproduction device according to (11), 
     wherein the frame information includes a second flag that represents whether the extended video to be output is a video on which no adjustment of the brightness has been performed or is a video on which an adjustment of the brightness has been performed. 
     (13) 
     The reproduction device according to any of (9) to (12), 
     wherein the communication unit performs communication with the display device in accordance with an HDMI standard to acquire an EDID serving as the performance information from the display device, and outputs the data of the extended video in which an InfoFrame serving as the frame information is added to the frame data. 
     (14) 
     The reproduction device according to any of (9) to (13), 
     wherein the coded data is coded data of an HEVC, and the brightness characteristic information and the brightness conversion definition information are each an SEI of an HEVC stream. 
     (15) 
     A reproduction method, including: 
     a step of reading out, from a recording medium that has recorded coded data of a standard video that is obtained by performing a brightness conversion of an extended video that is a video having a second brightness range that is wider than a first brightness range, the standard video being a video having the first brightness range, brightness characteristic information that represents a brightness characteristic of the extended video, and brightness conversion definition information used when performing the brightness conversion of the standard video to the extended video, the coded data, the brightness characteristic information, and the brightness conversion definition information; 
     a step of decoding the coded data; 
     a step of converting the standard video obtained by decoding the coded data to the extended video on a basis of the brightness conversion definition information; 
     a step of acquiring, from a display device that is to be an output destination of a video, performance information that is information representing a performance of the display device; 
     a step of outputting data of the extended video after adding frame information including the brightness characteristic information to frame data when the performance information includes information representing a display performance of the extended video; and 
     a step of outputting data of the standard video when the performance information includes no information representing the display performance of the extended video. 
     (16) 
     A recording medium, 
     wherein 
     coded data of a standard video that is obtained by performing a brightness conversion of an extended video that is a video having a second brightness range that is wider than a first brightness range, the standard video being a video having the first brightness range, brightness characteristic information that represents a brightness characteristic of the extended video, and 
     brightness conversion definition information used when performing the brightness conversion of the standard video to the extended video are recorded, and 
     wherein a reproduction device that reproduces the recording medium executes processing of reading out the coded data, the brightness characteristic information, and the brightness conversion definition information from the recording medium, 
     decoding the coded data, 
     converting the standard video obtained by decoding the coded data to the extended video on a basis of the brightness conversion definition information, 
     acquiring, from a display device that is to be an output destination of a video, performance information that is information representing a performance of the display device, 
     outputting data of the extended video after adding frame information including the brightness characteristic information to frame data when the performance information includes information representing a display performance of the extended video, and 
     outputting data of the standard video when the performance information includes no information representing the display performance of the extended video. 
     REFERENCE SIGNS LIST 
     
         
           1  recording device 
           2  reproduction device 
           3  display device 
           11  optical disc 
           21  controller 
           21 A Data Base information generation unit 
           22  coding processing unit 
           23  disc drive 
           31  HDR information generation unit 
           32  HEVC encoder 
           33  HDR-STD conversion unit 
           34  definition information generation unit 
           35  HEVC stream generation unit 
           51  controller 
           52  disc drive 
           53  memory 
           56  decoding processing unit 
           58  HDMI communication unit 
           71  parameter extraction unit 
           72  HEVC decoder 
           73  HDR-STD conversion unit 
           74  STD-HDR conversion unit 
           75  output unit