Patent Publication Number: US-2011052148-A1

Title: Additional content management device and management method

Description:
TECHNICAL FIELD 
     The present invention relates to an additional content management device and management method and more particularly to a management device and a management method for managing additional contents using a virtual package function defined as an expanded function of Blu-ray. 
     BACKGROUND ART 
     Blu-ray Disc (BD) is an optical disc standard using a blue-violet semiconductor laser and is in widespread use, and a recording/reproducing apparatus is provided that can use a package media of BD (BD-ROM). One of expanded functions of the Blu-ray standard is a virtual package function utilizing BD-J (Blu-ray Java (registered trademark)). This virtual package function is a function of reading an original content stored in a package media and an additional content stored in a recording medium at hand at the same time to make it look as if a virtual package medium maintained in the latest condition is reproduced. 
     By using the virtual package function as described above, for example, data of a reproduction-only BD-ROM can virtually be updated via the Internet or a medium such as a memory card. For example, additional contents such as new subtitle information, audio commentary, a new video clip, or a Blu-ray Java (registered trademark) application for an original content can be added/updated after providing a BD-ROM recording the original content to a user. 
     An additional content provided from the internet or a medium such as a memory card is saved in a local storage of a recording/reproducing apparatus (or a reproduction-only apparatus may be used). Therefore, to support the virtual package function, the recording/reproducing apparatus needs a local storage (e.g., HDD, an internal memory, or an external memory) which has over a certain capacity. 
       FIG. 10  is a diagram for explaining a conventional additional content saving processing in the virtual package function of BD-ROM. 
     A recording/reproducing apparatus  10  has a reproduction function for a BD-ROM  40 . A user can reproduce and enjoy an original content recorded beforehand in the BD-ROM  40  with the recording/reproducing apparatus  10 . 
     For example, the recording/reproducing apparatus  10  is able to acquire an additional content through a network from a content provider that provides the original content. Although not depicted, the additional content is also acquirable through an external recording medium as described above. In such a case, an internal storage (such as HDD)  41  of the recording/reproducing apparatus  10  or an external memory  42  such as an SD card is conventionally used as a storage destination of the additional content. 
     The additional content acquired by the recording/reproducing apparatus  10  is managed to have one-to-one correspondence to the BD-ROM  40  recording the original content. Therefore, if the acquired additional content is used to reproduce the original content, it is always needed to use the additional content that is managed to have one-to-one correspondence to the BD-ROM  40  recording the original content. 
     For management of such a content file and data recorded in a local storage, for example, Patent Document 1 discloses a reproducing apparatus that handles a content file recorded in a disc and an update file recorded in a local storage. This reproducing apparatus handles downloaded data with consideration that a path name and a file name in the local storage are different from a file having a path name and a file name in a virtual file system based on a path name specified in a src_file_name field of a Manifest ( ) section and a path name specified in a dst_file_name field. 
     Patent Document 2 discloses a technique for copying a portion of data on a recording medium mounted on a reproducing apparatus onto a recording portion within the reproducing apparatus to reproduce the data in a synchronized manner. An optical disc records a Clip  1  including an AV Stream referred to by a PlayItem indicating a main path and a Clip including a SubAV Stream referred to by a SubPlayltem indicating a sub-path in advance. The reproducing device copies the Clip recorded in the optical disc onto a local storage in advance such that the SubPlayltem can refer to the Clip of the local storage instead of the Clip in the optical disc to perform read-out. Therefore, a manifest file is generated or updated, and stored in the local storage. 
     PRIOR ART DOCUMENT 
     Patent Document 
     Patent Document 1: Japanese Laid-Open Patent Publication No. 2007-250161 
     Patent Document 2: Japanese Laid-Open Patent Publication No. 
     SUMMARY OF THE INVENTION 
     Problems to be Solved by the Invention 
       FIG. 11  is a diagram for explaining an example of a problem generated by a conventional virtual package function. As described above, in the conventional virtual package function, an original content recorded on the BD-ROM  40  and an additional content are managed to have one-to-one correspondence with each other, and the additional content is recorded in a medium such as an internal storage or an external memory. Therefore, the BD-ROM  40  recording the original content and the recording medium recording the additional content must always be used together. 
     For example, as depicted in  FIG. 11(A) , it is assumed that a user using the recording/reproducing apparatus  10  owns the BD-ROM  40  recording an original content and records an additional content for the original content in the external memory  42  using an SD card that is one of local storages in advance. 
     For example, if the user owns a plurality of recording/reproducing apparatuses and attempts to reproduce the original content with another recording/reproducing apparatus  11  instead of the recording/reproducing apparatus  10 , which is usually used, the BD-ROM  40  is moved to the another recording/reproducing apparatus  11  and the external memory  42  recording the additional content must also be moved to the another recording/reproducing apparatus  11  ( FIG. 11(B) ). 
     If the additional content is recorded by using the external memory  42  such as an SD card, a user must always carry or move the external memory  42  and the BD-ROM  40  recording the original content as a set, which is problematically troublesome and less user-friendly. 
       FIG. 12  is a diagram for explaining another example of a problem generated by the conventional virtual package function. Although the external memory  42  such as an SD card is used as a local storage recording an additional content in the example of  FIG. 11 , an internal storage (such as HDD) of the recording/reproducing apparatus  10  is used as a local storage in this example. 
     In this case, as depicted in  FIG. 12(A) , if the BD-ROM  40  recording the original content is mounted on the recording/reproducing apparatus  10 , it is possible to reproduce the original content using the additional content in the internal storage  41 . However, if it is attempted to reproduce the original content with the another recording/reproducing apparatus  11 , it is impossible to reproduce the original content using the additional content since the another recording/reproducing apparatus  11  has no additional content ( FIG. 12(B) ). 
     A technique for solving the problems related to handling of a local storage in the virtual package function as described above is not disclosed in Patent Documents 1 and 2. 
     The present invention was conceived in view of the situations and it is therefore the object of the present invention to provide a content management device and a content management method capable of always using an original content along with an additional content by always integrally managing the original content recorded in a package medium and the additional content. 
     Means for Solving the Problems 
     To solve the problem, a first technical means of the present application is a management device of an additional content added to an original content by using a virtual package function defined as an expanded function of Blu-ray, comprising: an additional content acquiring portion that acquires the additional content stored in an external storage portion; and an additional content recording portion that records an additional content acquired by the additional content acquiring portion into a predetermined recording medium, wherein the additional content recording portion performs an operation of detecting a hybrid recording medium that includes both a ROM area that is used only for reading data and a recording area that is used for writing data at any time, wherein if the hybrid recording medium is detected, the additional content recording portion records the additional content acquired by the additional content acquiring portion in the recording area of the detected hybrid recording medium, and wherein if the hybrid recording medium is not detected, the additional content recording portion records the additional content in a temporary storage portion built in the content management device or attached in the content management device. 
     A second technical means is the first technical means, wherein when recording the additional content in the recording area of the hybrid recording medium, the additional content recording portion recodes the additional content by having one-to-one correspondence to an original content recorded in the ROM area. 
     A third technical means is the first technical means, wherein the additional content recording portion temporarily stores the additional content acquired by the additional content acquiring portion in a predetermined temporary storage portion and moves the additional content stored in the temporary storage portion to the recording area to perform recording of the additional content in the recording area. 
     A fourth technical means is the first technical means, wherein the management device of the additional content has a content reproducing portion that enables reproduction of an original content and an additional content recorded in the hybrid recording medium, and when detecting that the additional content is recorded in the hybrid recording medium, the content reproducing portion reads the additional content from the recording medium and temporarily stores it into the predetermined temporary storage portion, and reproduces the additional content stored in the temporary storage portion and the original content recorded in the hybrid recording medium. 
     A fifth technical means is the first technical means, comprising an additional content duplicating/moving portion that duplicates or moves an additional content stored in an external memory attached in the management device of the additional content to the hybrid recording medium, wherein the additional content duplicating/moving portion detects whether the hybrid recording medium is attached in a recordable manner in accordance with input of instruction information instructing the duplication or movement, wherein if the recordable hybrid recording medium is detected, the additional content duplicating/moving portion detects whether the additional content available for the duplication or movement exists within the external memory, wherein if the additional content available for the duplication or movement is detected within the external memory, the additional content duplicating/moving portion duplicates or moves the additional content recorded in the external memory into the recording area of the detected hybrid recording medium, and wherein after the additional content is duplicated or moved into the recording area of the hybrid recording medium, an original content recorded in the ROM area has one-to-one correspondence to the additional content. 
     A sixth technical means is the first technical means, comprising an additional content duplicating/moving portion that duplicates or moves an additional content stored in an external memory attached in the management device of the additional content to the hybrid recording medium, wherein the additional content duplicating/moving portion detects whether the hybrid recording medium is attached in a recordable manner, wherein when the hybrid recording medium is attached in a recordable manner, if instruction information instructing the duplication or movement is input, the additional content duplicating/moving portion detects whether the additional content available for the duplication or movement exists within the external memory, and wherein if the additional content available for the duplication or movement is detected within the external memory, the additional content duplicating/moving portion duplicates or moves the additional content recorded in the external memory into the recording area of the hybrid recording medium, and wherein after the additional content is duplicated or moved into the recording area of the hybrid recording medium, an original content recorded in the ROM area has one-to-one correspondence to the additional content. 
     A seventh technical means is the fifth or sixth technical means, wherein the additional content duplicating/moving portion has a function that enables the movement or duplication of the additional content from the hybrid recording medium having the additional content recorded thereon to an external memory, wherein if instruction information is input that instructs duplication or movement of the additional content from the hybrid recording medium to an external memory, the additional content duplicating/moving portion detects whether an additional content available for duplication or movement exists in the hybrid recording medium attached in the management device, wherein if it is detected that the additional content available for the duplication or movement exists in the hybrid recording medium, the additional content duplicating/moving portion detects whether an external memory is attached in a recordable manner, and wherein if the recordable external memory is detected, the additional content duplicating/moving portion duplicates or moves the additional content recorded in the hybrid recording medium to the detected recordable external memory. 
     An eighth technical means is a management method of an additional content using a virtual package function defined as an expanded function of Blu-ray, comprising: an additional content acquiring step of acquiring the additional content stored in an external storage portion by a recording/reproducing apparatus; and an additional content recording step of recording an additional content acquired by the additional content acquiring portion into a predetermined recording medium by the recording/reproducing apparatus, wherein at the additional content recording step, a hybrid recording medium is detected that includes both a ROM area that is used only for reading data and a recording area that is used for writing data at any time and records the additional content acquired by the additional content acquiring portion in the recording area of the detected hybrid recording medium. 
     EFFECT OF THE INVENTION 
     The present invention is capable of always using an original content along with an additional content by always integrally managing the original content recorded in a package medium and the additional content. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
         FIG. 1  is a conceptual diagram of an embodiment of a content management device according to the present invention. 
         FIG. 2  is a block diagram of an exemplary configuration of a recording/reproducing apparatus used for the content management device according to the present invention. 
         FIG. 3  is a diagram for explaining an exemplary configuration of a hybrid-type BD applicable to the content management device of the present invention. 
         FIG. 4  is a flowchart for explaining an example of the additional content recording processing in a content management method of the present invention. 
         FIG. 5  is a flowchart for explaining another example of the additional content recording processing in the content management method of the present invention. 
         FIG. 6  is a flowchart for explaining an example of the content reproducing processing in the content management method of the present invention. 
         FIG. 7  is a flowchart for explaining an example of the processing for moving an additional content to a disc in the content management method of the present invention. 
         FIG. 8  is a flowchart for explaining another example of the processing for moving an additional content to a disc in the content management method of the present invention. 
         FIG. 9  is a flowchart for explaining an example of the processing for moving an additional content to an external memory according to the present invention. 
         FIG. 10  is a diagram for explaining the conventional additional content saving processing in a virtual package function of a BD-ROM. 
         FIG. 11  is a diagram for explaining an example of a problem generated by a conventional virtual package function. 
         FIG. 12  is a diagram for explaining another example of a problem generated by the conventional virtual package function. 
     
    
    
     EMBODIMENTS OF THE INVENTION 
       FIG. 1  is a conceptual diagram of an embodiment of a content management device according to the present invention. The embodiment of the present invention uses a disc medium (hybrid recording medium) including a read only area (ROM area) and a writable recording area (RE area) to record an additional content corresponding to a virtual package function of the BD-ROM standard together with an original content in one disc medium. A hybrid BD (blu-ray disc)  20  including a ROM area  21  and a recording area  22  as described above is preferably usable as a disc medium. A BD configured as such a hybrid recording medium will be referred to simply as the BD  20  in the following description. 
     The content management device according to the present invention is applicable to a recording/reproducing apparatus  10  including a content reproducing function and a recording function for recording the additional content described above in the BD  20 . The recording/reproducing apparatus  10  includes an additional content acquiring portion that acquires an additional content using the virtual package function defined as an expanded function of Blu-ray from an external storage portion, and an additional content recording portion that records the additional content acquired by the additional content acquiring portion in the BD  20  that is a predetermined recording medium. 
     The original content is generally recorded in the ROM area of the BD  20  in advance and is provided to a user as a package medium. If the user adds a content through the virtual package function of the Blu-ray standard, the additional content is recorded in the recording area of the BD  20 . 
     The recording/reproducing apparatus  10  can acquire the additional content from the external storage portion as described above. The external storage portion includes a system of a content provider  30  via a network. The recording/reproducing apparatus downloads and acquires the additional content from the content provider  30 . Alternatively, the additional content may be acquired from an external memory (not shown) serving as the external storage portion described above. 
     The recording/reproducing apparatus  10  records the acquired additional content in the recording area of the BD  20 . This causes the original content and the additional content to exist as a pair in the one BD  20  and eliminates the need for the user to manage the additional content. When the content is recorded in the BD  20 , the copyright protection technology according to AACS (Advanced Access Content System) employed in the BD standard is used to write the content into the recording layer to protect the copyright of the content. 
     Although a user must manage a combination of a package medium recording the original content and the additional content for every device or external memory in a conventional technique, according to the embodiment of the present invention, it is possible to manage a combination of the original content and the additional content as a pair in the one BD  20  and, therefore, the management by a user is unnecessary. It is also advantageous that the risk of loss of data due to physical damage, etc., of the recording/reproducing apparatus is eliminated. 
     There are some other advantages including that the BD  20  already enables to encrypt information recorded on the disc and to safely manage the encrypted information and that the addition of a new function to the recording/reproducing apparatus  10  is not necessary because the recording/reproducing apparatus itself is equipped with a means for encryption. 
       FIG. 2  is a block diagram of an exemplary configuration of a recording/reproducing apparatus applicable to the content management device according to the present invention. The recording/reproducing apparatus  10  includes an optical disc drive  101  capable of reading and writing data on an optical disc, an internal storage  102  such as HDD, and an external memory slot  103  for reading/writing data in an external memory such as an SD card. A card reader or a USB I/F is applicable to the external memory slot  103 . 
     The recording/reproducing apparatus  10  also includes a decoder  104  that decodes and outputs encoded data recorded in the BD and the internal storage  102  or an external memory, an output IF portion  105  that outputs a data signal output from the decoder  104  to an external device such as a television, a communicating portion  109  such as a LAN I/F for communicating with an external device or system through a network, a remote control receiving portion  110  that receives a remote control signal transmitted from a remote controller; an operating portion  111  that accepts an operational input from a user, a microcomputer  112  that control the portions of the apparatus; and a ROM  108 , an EEPROM  107 , and a RAM  106  as storage memories for programs and data. 
     The configuration of this example employs the BD  20 , which is a hybrid-type optical disc including a read only ROM area and a rewritable recording area, as a package medium recording the original content. The BD  20  is provided with an original content recorded in advance in the ROM area and a user can watch the reproduced content on a television, etc., connected to the recording/reproducing apparatus  10  by reproducing the BD  20  inserted into the optical disc drive  101  of the recording/reproducing apparatus  10 . 
     The recording/reproducing apparatus  10  can acquire an additional package of the original content conforming to the virtual package function of the Blu-ray standard from a content provider, etc., through a network. Alternatively, it is possible to acquire the additional package from an external memory via the external memory slot  103 . As a result, the content acquiring portion of the present invention is realized. 
     The acquired additional package is recorded in the recording area of the BD  20  inserted in the optical disc drive  101 . As a result, a content recording portion of the present invention is realized. 
     In the BD  20 , the original content and the additional content are usable by having one-to-one correspondence with each other in accordance with the Blu-ray standard. With this, it is possible to reproduce/watch the virtually updated original content by utilizing the additional content. Since the original content and the additional content are recorded by having correspondence with each other in the one BD  20  in this embodiment, it is unnecessary for the user to manage the additional content and it becomes possible to create a user-friendly package medium. 
     The recording/reproducing apparatus  10  has a function of duplicating or moving the additional content stored in an external memory attached in the external memory slot  103  to the BD  20  or duplicating or moving the additional content stored in the BD  20  to an external memory attached in the external memory slot  103 . This realizes a content duplicating/moving portion of the present invention. 
       FIG. 3  is a diagram for explaining an exemplary configuration of a hybrid-type BD applicable to the content management device of the present invention. As described above, in the embodiment according to the present invention, the hybrid-type BD having the ROM area and the recording area is used to record the original content and the additional content. 
     For example, as described in  FIG. 3(A) , the BD  20  can employ a configuration having the recording area formed as a multilayer structure, a portion of the multilayered recording layer defined as the read only ROM area  21 , and a remaining portion defined as the rewritable recording area  22 . Although the depicted recording layer has a three-layer configuration and two layers thereof are used as the ROM area, the multilayered configuration may include four layers or more. The positional relationship between the ROM area  21  and the recording area  22  may be a relationship opposite to that shown in  FIG. 3(A) , i.e., the recording area  22  may be disposed on a surface layer with the ROM area  21  located on the underside thereof. 
     In another configuration of the BD  20 , as depicted in  FIG. 3(B) , a single-layer recording area may be divided in the radial direction of the disc to form the ROM area  21  and the recording area  22 . The positional relationship between the ROM area  21  and the recording area  22  may be a relationship opposite to that shown in  FIG. 3(B) , i.e., the recording area  22  may be disposed on the inner side of the disc with the ROM area  21  located on the outer side thereof. 
       FIG. 4  is a flowchart for explaining an example of the additional content recording processing according to the present invention. This flowchart describes an example of the processing when the recording/reproducing apparatus  10  downloads and records an additional content from a content provider, etc., onto the BD  20  inserted into the recording/reproducing apparatus  10 . The following description will be made with reference to the configurations of  FIGS. 2 and 3 . 
     First, the recording/reproducing apparatus  10  downloads an additional content corresponding to an original content from a content provider, etc., (step S 1 ). The recording/reproducing apparatus  10  determines whether an inserted disc is a hybrid-compatible disc (the BD  20 ) (step S 2 ). It is assumed that the recording/reproducing apparatus  10  includes a mechanism determining whether a disc is hybrid. 
     If the disc is hybrid-compatible, the recording/reproducing apparatus  10  directly records the downloaded additional content into the recording area  22  of the disc (the BD  20 ) (step S 3 ). 
     On the other hand, if the disc is not hybrid-compatible, the recording/reproducing apparatus  10  saves the downloaded additional content into the internal storage  102  or an external memory attached in the external memory slot  103  (step S 4 ). 
     In this example, the recording/reproducing apparatus  10  determines whether the disc is hybrid-compatible, records the downloaded additional content in the recording area  22  of the disc in the case of the hybrid disc, and saves the additional content in the internal storage or the external memory in the same manner as a conventional technology if the disc is not hybrid. 
       FIG. 5  is a flowchart for explaining another example of the additional content recording processing according to the present invention and describes another example of the processing when the recording/reproducing apparatus  10  downloads and records an additional content from a content provider, etc., on the hybrid BD inserted into the recording/reproducing apparatus  10 . 
     First, the recording/reproducing apparatus  10  downloads an additional content corresponding to an original content from a content provider, etc., (step S 11 ). The recording/reproducing apparatus  10  determines whether an inserted disc is a hybrid-compatible disc (the BD  20 ) (step S 12 ). It is assumed that the recording/reproducing apparatus  10  includes a mechanism determining whether a disc is hybrid. 
     If the disc is hybrid-compatible, the recording/reproducing apparatus  10  saves the downloaded content in a temporary area of the recording/reproducing apparatus  10  (step S 13 ). The temporary area is a storage area built in or accessible by the recording/reproducing apparatus and corresponds to a temporary storage portion of the present invention. To the temporary area, for example, in the example of  FIG. 2 , the RAM  106  or the internal storage  102  is applicable. An external memory, etc., connected to the external memory slot  103  may also be available. The additional content once saved in the temporary area is then recorded in the recording area  22  of the disc (step S 14 ). 
     For example, if the additional content is downloaded to the recording/reproducing apparatus  10  via the Internet, etc., the additional content may not normally be downloaded due to an unexpected problem, etc., and it is therefore preferred to save the additional content in the disc after temporarily saving it in another area such as the RAM  106  or the internal storage  102 . 
     On the other hand, if the disc is not hybrid-compatible, the recording/reproducing apparatus  10  saves the downloaded additional content into the internal storage  102  or an external memory attached in the external memory slot  103  (step S 15 ). 
     In this example, the recording/reproducing apparatus  10  determines whether the disc is a hybrid-compatible disc, records the downloaded additional content in the recording area  22  of the disc after temporarily saving it in the temporary area in the case of the hybrid disc, and saves the additional content in the internal storage or the external memory in the same manner as a conventional technology if the disc is not hybrid. 
       FIG. 6  is a flowchart for explaining an example of the content reproducing processing according to the present invention. If the original content and the additional content recorded on the disc (BD  20 ) are used for reproduction with the recording/reproducing apparatus  10 , since the original content and the additional content are recorded in different areas (the ROM area  21 , the recording area  22 ) in the BD  20 , the readout of data by the optical disc drive  101  may not be performed in time. To deal with this situation, if the additional content is recorded in the disc of the package medium, the additional content is reproduced after reading it into the temporary area so as to avoid failure of the reproduction. 
     In this example, first, a user inserts the disc in the recording/reproducing apparatus  10  to reproduce the contents recorded on the disc (BD  20 ) (step S 21 ). The recording/reproducing apparatus  10  determines whether the inserted disc is a hybrid-compatible disc (step S 22 ). It is assumed that the recording/reproducing apparatus  10  includes a mechanism determining whether a disc is hybrid. 
     If the disc is hybrid-compatible, the recording/reproducing apparatus  10  confirms the presence of an additional content in the disc. The additional content in the disc is read into a temporary area in advance (step S 24 ). The temporary area is a storage area built in or accessible by the recording/reproducing apparatus and corresponds to the temporary storage portion of the present invention. To the temporary area, for example, in the example of  FIG. 2 , the RAM  106  or the internal storage  102  is applicable. An external storage, etc., connected to the external memory slot  103  may also be available. 
     The timing of reading the additional content from the disc is set such that the recording/reproducing apparatus  10  confirms the disc at the time of insertion and starts reading as soon as the presence of the additional content is determined. The additional content temporarily saved in the temporary area is then used to execute the reproducing processing of the original content recorded in the disc (step S 25 ). 
     On the other hand, if the disc is not hybrid-compatible, the recording/reproducing apparatus  10  confirms the presence of the additional content in the internal storage or the external memory (step S 26 ). In the example of  FIG. 2 , the confirmation of the additional content is performed for the RAM  106 , the internal storage  102 , and the external memory connected to the external memory slot  103 . The confirmed additional content is then used to execute the reproducing processing of the original content recorded in the disc (step S 25 ). The processing at step S 26  is the same as the conventional processing. 
     The additional content read into the temporary area is deleted when the additional content is no longer necessary such as when ejecting the disc. 
       FIG. 7  is a flowchart for explaining an example of the processing for moving an additional content to a disc in the content management method of the present invention. 
     In this example, an additional content saved in an external memory by a recording/reproducing apparatus not supporting a hybrid disc is duplicated or moved to the recording area  22  of a hybrid disc by a recording/reproducing apparatus supporting a hybrid disc. In this case, if the copying (duplicating) of the content is not permitted by copyright, a moving (move) processing is executed and, if the copying is permitted, the duplication processing is executed. In this example, description will be made of the case that a user arbitrarily gives an instruction for the duplication processing. 
     First, a user attaches the external memory in the recording/reproducing apparatus  10  supporting a hybrid disc to duplicate (copy) the additional content recorded in the external memory to the disc (BD  20 ), inserts the disc recording the original content into the recording/reproducing apparatus, and gives an instruction for duplicating the additional content (step S 31 ). 
     The recording/reproducing apparatus  10  determines whether the inserted disc is a hybrid-compatible disc (step S 32 ). It is assumed that the recording/reproducing apparatus  10  includes a mechanism determining whether a disc is hybrid. 
     If the disc is hybrid-compatible, the recording/reproducing apparatus  10  refers to the inserted disc and the additional content in the external memory (step S 33 ). If a duplicable additional content is detected by the reference (step S 34 , YES), the additional content is copied to the disc (step S 35 ). If the additional content is moved because the additional content cannot be duplicated due to copyright, the movement is performed after the deletion of the original data in the external memory (step S 36 ). 
     On the other hand, if the disc is not hybrid-compatible at step S 32  or if the duplicable additional content is not detected at step S 34 , the processing is terminated. 
       FIG. 8  is a flowchart for explaining another example of the processing for moving an additional content to a disc according to the present invention. 
     In the example of  FIG. 8 , unlike the example of  FIG. 7 , before a user gives an instruction for the duplication of the additional content, the recording/reproducing apparatus  10  detects in advance whether the disc is hybrid-compatible. 
     In this example, first, the recording/reproducing apparatus  10  determines whether the inserted disc is a hybrid-compatible disc (step S 41 ). It is assumed that the recording/reproducing apparatus  10  includes a mechanism determining whether a disc is hybrid. 
     If the disc is hybrid-compatible, a user attaches the external memory in the recording/reproducing apparatus  10  supporting a hybrid disc to copy the additional content recorded in the external memory to the disc and gives an instruction for duplicating (copying) the additional content (step S 42 ). 
     The recording/reproducing apparatus  10  refers to the inserted disc and the additional content in the external memory (step S 43 ). If a duplicable additional content is detected by the reference (step S 44 , YES), the additional content is duplicated to the disc (step S 45 ). If the additional content is moved because the additional content cannot be duplicated due to copyright, the movement is performed after the deletion of the original data in the external memory (step S 46 ).
         On the other hand, if it is determined that the disc is not hybrid-compatible at step S 41  or if the copiable additional content is not detected at step S 44 , the processing is terminated.       

       FIG. 9  is a flowchart for explaining an example of the processing for moving an additional content to an external memory according to the present invention. 
     In this example, an additional content downloaded and saved in an internal storage by a recording/reproducing apparatus not supporting a hybrid disc is moved or duplicated to an external memory. In this case, if the duplicating of the content is not permitted by copyright, the movement (move) processing is executed and, if the duplicating is permitted, the duplication processing is executed. 
     First, a user gives an instruction for duplicating the additional content to duplicate the additional content recorded in the internal storage of the recording/reproducing apparatus not supporting a hybrid disc (step S 51 ). 
     The recording/reproducing apparatus  10  detects a copiable additional content from the internal storage (step S 52 ). If a copiable additional content is detected, it is further determined whether the external memory is attached (step S 53 ). 
     If the external memory exists, the recording/reproducing apparatus  10  copies the additional content stored in the internal storage to the external memory (step S 54 ). If the additional content is moved because the additional content cannot be duplicated due to copyright, the movement is performed after the deletion of the original data in the internal storage (step S 55 ). 
     On the other hand, if the duplicable additional content is not detected at step S 52  or if the external memory is not attached at step S 53 , the processing is terminated. 
     EXPLANATIONS OF REFERENCE NUMERALS 
     
         
         
           
               10  . . . recording/reproducing apparatus;  11  . . . recording/reproducing apparatus;  20  . . . BD;  21  . . . ROM area;  22  . . . recording area;  30  . . . content provider;  40  . . . BD-ROM;  41  . . . internal storage;  42  . . . external memory;  101  . . . optical disc drive;  102  . . . internal storage;  103  . . . external memory slot;  104  . . . decoder;  105  . . . output I/F portion;  106  . . . RAM;  107  . . . EEPROM;  108  . . . ROM;  109  . . . communicating portion;  110  . . . remote control receiving portion;  111  . . . operating portion; and  112  . . . microcomputer.