Patent Publication Number: US-2021195711-A1

Title: Reproduction apparatus, reproduction method, program, and reproduction system

Description:
TECHNICAL FIELD 
     The present technology relates to a reproduction apparatus, a reproduction method, a program, and a reproduction system of audio content. 
     BACKGROUND ART 
     In the past, a system in which a home network is established in a house and a reproduction apparatus connected thereto reproduces content such as music and video has been known. For example, Patent Literature 1 describes a method of controlling multi-room reproduction in which a plurality of reproduction apparatuses connected to a network forms a group and the group executes synchronous reproduction of the same content (see, for example, paragraphs [0043] to [0046] and FIG. 8 of Patent Literature 1). 
     Further, Patent Literature 2 describes an audio reproduction apparatus including an illumination device including a plurality of LEDs or the like. In this audio reproduction apparatus, audio data to be reproduced is analyzed. Then, in accordance with the analysis result, light emission timing, brightness, and the like of the illumination device are appropriately controlled. This makes it possible to enjoy the reproduction of the audio content with not only the auditory sense but also the visual sense and experience high excitement and an uplifting feeling (see, for example, paragraphs [0026] to [0041] and FIGS. 6 to 14 of Patent Literature 1). 
     Citation List 
     Patent Literature 
     Patent Literature 1: WO 2016/103546 
     Patent Literature 2: WO 2014/103118 
     DISCLOSURE OF INVENTION 
     Technical Problem 
     It is expected that the technology for reproducing audio content by a plurality of reproduction apparatuses will continue to spread in the future. There is a demand for a technology capable of providing a viewing experience with high quality to a user. 
     In view of the circumstances as described above, it is an object of the present technology to provide a reproduction apparatus, a reproduction method, a program, and a reproduction system that are capable of providing a viewing experience with high quality to a user. 
     Solution to Problem 
     In order to achieve the above-mentioned object, a reproduction apparatus according to an embodiment of the present technology is a reproduction apparatus capable of executing synchronous reproduction of audio content with a different reproduction apparatus, the reproduction apparatus including: an illumination unit; an acquisition unit; a generation unit; a transmission unit; and a synchronization control unit. 
     The acquisition unit acquires audio information. 
     The generation unit generates illumination control information associated with the acquired audio information. 
     The transmission unit transmits, to the different reproduction apparatus, synchronization control information that includes the audio information and the illumination control information. 
     The synchronization control unit executes synchronous reproduction of the audio content with the different reproduction apparatus and synchronous control of the illumination unit, on a basis of the synchronization control information. 
     In his reproduction apparatus, illumination control information associated with audio information is generated. Synchronization control information including the generated illumination control information and the audio information is transmitted to a different reproduction apparatus. Accordingly, it is possible to execute synchronous reproduction of the audio content and synchronous control of the illumination unit, on the basis of the synchronization control information. As a result, it is possible to provide a viewing experience with high quality to a user. 
     The generation unit may generate, as the synchronization control information, a packet of the audio information, the packet having a header to which the illumination control information is added. 
     Accordingly, it is possible to easily execute synchronous reproduction of the audio content and synchronous control of the illumination unit. 
     The generation unit may generate the illumination control information by analyzing the acquired audio information. 
     Accordingly, it is possible to execute illumination control synchronized with the audio content with high precision. 
     The illumination control information may include a plurality of illumination patterns and start timings of the plurality of illumination patterns. 
     Accordingly, it is possible to execute various types of illumination control and provide a viewing experience with high quality. 
     The illumination control information may include an illumination color. 
     Accordingly, it is possible to execute various types of illumination control and provide a viewing experience with high quality. 
     The generation unit may classify the audio content into a plurality of reproduction states on a basis of the audio information, and associate the plurality of reproduction states with illumination patterns. 
     Accordingly, it is possible to execute illumination control synchronized with the audio content with high precision. 
     The generation unit may classify the plurality of reproduction states on a basis of beat included in the audio content. 
     Accordingly, it is possible to execute illumination control synchronized with the audio content with high precision. 
     The generation unit may generate the illumination control information in association with apparatus designation information for designating the different reproduction apparatus. 
     Accordingly, it is possible to perform illumination control in which a different reproduction apparatus is designated, and provide a viewing experience with high quality. 
     The generation unit may classify the illumination unit into a plurality of classified illumination units in accordance with predetermined rules, and generate the illumination control information in association with classification designation information for designating each of the plurality of classified illumination units. 
     Accordingly, it is possible to execute various types of illumination control and provide a viewing experience with high quality. 
     The plurality of classified illumination units may be classified on a basis of installation positions. 
     Accordingly, it is possible to improve the sense of unity through synchronous control of illumination, and provide a viewing experience with high quality. 
     The plurality of classified illumination units may include a main illumination unit, an upper-side illumination unit, a lower-side illumination unit, and a speaker illumination unit. 
     Accordingly, it is possible to improve the sense of unity through synchronous control of illumination, and provide a viewing experience with high quality. 
     The generation unit may generate the illumination control information on a basis of a state of the different reproduction apparatus. 
     Accordingly it is possible to provide a viewing experience with high quality. 
     The generation unit may generate the illumination control information on a basis of volume of the different reproduction apparatus. 
     Accordingly, it is possible to provide a viewing experience with high quality. 
     The generation unit may generate the illumination control information on a basis of an installation environment of the different reproduction apparatus. 
     Accordingly, it is possible to provide a viewing experience with high quality. 
     A reproduction method according to an embodiment of the present technology is a reproduction method by a reproduction apparatus including an illumination unit, including; acquiring audio information. 
     Illumination control information associated with the acquired audio information is generated. 
     Synchronization control information that includes the audio information and the illumination control information is transmitted to a different reproduction apparatus. 
     Synchronous reproduction of the audio content with the different reproduction apparatus and synchronous control of the illumination unit are executed on a basis of the synchronization control information. 
     A program according to an embodiment of the present technology causes a reproduction apparatus including an illumination unit to execute the steps of: 
     acquiring audio information; 
     generating illumination control information associated with the acquired audio information; 
     transmitting, to a different reproduction apparatus, synchronization control information that includes the audio information and the illumination control information; and 
     executing synchronous reproduction of the audio content with the different reproduction apparatus and synchronous control of the illumination unit, on a basis of the synchronization control information. 
     A reproduction system according to an embodiment of the present technology is a reproduction system including: a reproduction apparatus; and a different reproduction apparatus, in which the reproduction apparatus includes the illumination unit, the acquisition unit, the generation unit, the transmission unit, and the synchronization control unit. 
     The different reproduction apparatus includes a reception unit and a synchronization control unit. 
     The reception unit receives the synchronization control information transmitted from the reproduction apparatus. 
     The synchronization control unit executes synchronous reproduction of the audio content with the reproduction apparatus and synchronous control of the illumination unit, on a basis of the received synchronization control information. 
     A reproduction method according to another embodiment of the present technology is executed by a reproduction apparatus; and a different reproduction apparatus. 
     The reproduction apparatus acquires audio information, generates illumination control information associated with the acquired audio information, transmits, to a different reproduction apparatus, synchronization control information that includes the audio information and the illumination control information, and executes synchronous reproduction of the audio content with the different reproduction apparatus and synchronous control of the illumination unit, on a basis of the synchronization control information. 
     The different reproduction apparatus receives the synchronization control information transmitted from the reproduction apparatus, and executes synchronous reproduction of the audio content with the reproduction apparatus and synchronous control of the illumination unit, on a basis of the received synchronization control information. 
     Advantageous Effects of Invention 
     As described above, in accordance with the present technology, it is possible to provide a viewing experience with high quality to a user. It should be noted that the effect described here is not necessarily limitative and may be any effect described in the present disclosure. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
         FIG. 1  is a schematic diagram showing a configuration example of a content reproduction system according to an embodiment. 
         FIG. 2  is an external view showing a configuration example of a reproduction apparatus. 
         FIG. 3  is an external view showing a configuration example of the reproduction apparatus. 
         FIG. 4  is an external view showing a configuration example of the reproduction apparatus. 
         FIG. 5  is an external view showing a configuration example of the reproduction apparatus. 
         FIG. 6  is a block diagram showing a functional configuration example of the reproduction apparatus. 
         FIG. 7  is a schematic diagram showing an example of analysis of audio data by an audio analysis unit. 
         FIG. 8  is a schematic diagram for describing setting of a reproduction state. 
         FIG. 9  is a diagram schematically showing a plurality of illumination patterns in association with each reproduction state. 
         FIG. 10  is a sequence diagram showing a processing example at the time when multi-room reproduction accompanied by synchronous control of an illumination unit is executed. 
         FIG. 11  is a sequence diagram showing a processing example at the time when the multi-room reproduction accompanied by synchronous control of the illumination unit is executed. 
         FIG. 12  is a schematic diagram showing an example of synchronization control information. 
         FIG. 13  is a schematic diagram for describing an operation of executing the multi-room reproduction by a master apparatus and a slave apparatus. 
         FIG. 14  is a schematic diagram for describing an example of a basic illumination pattern. 
         FIG. 15  is a schematic diagram for describing an example of the basic illumination pattern. 
         FIG. 16  is a schematic diagram showing an example of a light emission pattern in an ON-state. 
         FIG. 17  is a schematic diagram showing an example of the light emission pattern in the ON-state. 
         FIG. 18  is a schematic diagram showing an example of the light emission pattern in the ON-state. 
     
    
    
     MODE(S) FOR CARRYING OUT THE INVENTION 
     Hereinafter, an embodiment of the present technology will be described with reference to the drawings. 
     [Content Reproduction System] 
       FIG. 1  is a schematic diagram showing a configuration example of a content reproduction system according to an embodiment of the present technology. content reproduction system  100  includes a home network  1  established in a house, a plurality of reproduction apparatuses  10  connected thereto, a content server  20  that provides content, and a portable terminal  30 . 
     The plurality of reproduction apparatuses  10 , the content server  20 , and the portable terminal  30  are connected to the home network  1  through wireless LAN communication such as WiFi via an access point (not shown). As the home network  1 , for example, a network conforming to the DLNA (registered trademark) (Digital Living Network Alliance) standard is used. 
     In this case, the plurality of reproduction apparatuses  10  each function as a DMR (Digital Media Renderer), and the content server  20  functions as a DMS (Digital Media Server). Further, the portable terminal  30  functions as a DMC (Digital Media Controller). Note that the present technology is applicable also to the case where a network using another protocol is established. 
     The plurality of reproduction apparatuses  10  are arranged in each room such as a living room, a bed room, and a kitchen. The portable terminal  30  transmits an instruction to acquire and reproduce content from the content server  20  to each reproduction apparatus  10  by using, for example, a control message of UPnP (Universal Plug and Play). Therefore, a user is capable of controlling the operation of reproducing the reproduction apparatuses  10  arranged in each room by operating the portable terminal  30 . 
     Further, assumption is made that the home network  1  and a global network are connected to each other via a home gateway (not shown). In this case, by operating the portable terminal  30 , it is also possible to cause each reproduction apparatus  10  to reproduce content in content server  21  present in the global network (cloud). Further, it is also possible to cause the reproduction apparatus  10  to reproduce content, by using short-range wireless communication such as Bluetooth (registered trademark). 
     [Multi-Room Reproduction] 
     In this embodiment, by operating the portable terminal  30 , it is possible to execute multi-room reproduction of audio content. The multi-room reproduction is a reproduction method in which the plurality of reproduction apparatuses  10  connected to the home network  1  form a group and the group executes synchronous reproduction of the same content. 
     For example, it is possible to enjoy music with loud volume in the entire room by causing the plurality of reproduction apparatuses  10  in the same room to reproduce the same content. Alternatively, in the case of inviting a lot of friends to hold a party, for example, it is possible to liven up the party by causing the reproduction apparatuses  10  arranged in each room to reproduce the same content and simultaneously controlling the operation thereof. 
     As shown in  FIG. 1 , in this embodiment, one of the plurality of reproduction apparatuses  10  forming a group is set as a master apparatus  10 a, and a different reproduction apparatus  10  is set as a slave apparatus  10 b. In the case where the multi-room reproduction is executed, an instruction therefor is transmitted to the master apparatus  10   a.  The master apparatus  10   a  downloads content from the content server  20 , and simultaneously distributes the content to the slave apparatus  10   b  by streaming. Accordingly, the multi-room reproduction of content is realized. Note that the master apparatus  10   a  and the slave apparatus  10   b  are respectively referred to also as a parent device and a child device in some cases. Further, the slave apparatus  10   b  is referred to as a player device in some cases. 
     By the multi-room reproduction, it is possible to execute not only synchronous reproduction of content but also control of reproduction volume, switching of content, and the like in synchronization. Meanwhile, it is also possible to individually execute control of reproduction volume and control of fade-in/fade-out or the like on each reproduction apparatus while synchronizing the reproduction positions. 
     The method for realizing synchronous reproduction by the master apparatus  10   a  and the slave apparatus  10   b  is not limited, and an arbitrary technology relating to synchronous reproduction or the like may be used, for example. For example, synchronous reproduction can be executed by achieving synchronization by clock and a time stamp and combining buffer processing therewith. Examples thereof include flow control or the like that combines an RTP (Real-time Transport Protocol) and an RTCP (RTP Control Protocol). 
     Note that in this embodiment, synchronous control of illumination units of the reproduction apparatuses  10  is executed in accordance with the multi-room reproduction of audio content. This point will be described in detail later. 
       FIG. 2  to  FIG. 5  are each an external view of showing a configuration example of the reproduction apparatus  10 . The reproduction apparatus  10  includes a main body  11 , a speaker unit  12  provided in the main body  11 , an illumination unit  13 , and an operation panel  14 . 
     The speaker unit  12  is typically configured in a multi-way system. For example, it is configured in a two-way system, i.e., it includes a high-range speaker (tweeter) and a low-range speaker (woofer). Alternatively, for example, it is configured in a three-way system, e., it includes a high-range speaker (tweeter), a mid-range speaker (squawker), and a low-range speaker (woofer). It goes without saying that the present technology is not limited thereto, and the present technology is applicable also to a full-range speaker. 
     The Illumination unit  13  includes a solid light source such as an LED and an LD, a lamp light source, or the like, and is capable of emitting light of various colors. In this embodiment, it is classified into a plurality of illumination groups on the basis of the position installed in the main body  11 . That is, it is classified into a main illumination unit  13   a , a top illumination unit  13   b , a bottom illumination unit  13   c , and a woofer illumination unit  13   d.    
     In each reproduction apparatus  10 , the main illumination unit  13   a  is disposed on the front surface or the like of the main body  11 , and is an illumination unit that exhibits the most visually expressive illumination effect. The top illumination unit  13   b  is disposed on the upper side of the reproduction apparatus  10 , and emits illumination light to the ceiling, the back wall, and the like. The bottom illumination unit  13   c  is disposed on the lower side of the reproduction apparatus  10 , and emits illumination light mainly to the feet. The woofer illumination unit  13   d  is disposed in the vicinity of the woofer, and effectively illuminates the woofer having a large diameter. 
     An appropriate operation by each illumination unit realizes various types of exciting illumination synchronized with audio content. Note that in each reproduction apparatus  10 , the main illumination unit  13   a  is always set, and other illumination units are set as necessary. 
     In this embodiment, the illumination unit  13  corresponds to an illumination unit. The plurality of illumination groups correspond to a plurality of classified illumination units configured by classifying the illumination units in accordance with predetermined rules. Further, the top illumination unit  13   b , the bottom illumination unit  13   c , and the woofer illumination unit  13   d  respectively correspond to an upper-side illumination unit, a lower-side illumination unit, and a speaker illumination unit. Note that a lateral-side illumination unit, a tweeter illumination unit, and be like may be configured. Note that the predetermined rules are not limited, and the illumination units may be classified in accordance with rules different from the installation positions. 
     The operation panel  14  is capable of inputting control regarding the speaker unit  12 , e.g., control of volume and audio, control regarding the illumination unit  13 , e.g., control of a light emission color and a light emission mode, or the like. 
     The reproduction apparatus  10  illustrated in Parts A and B of  FIG. 2  includes the main body  11  having an elongated quadrangular prismatic shape. The height of the main body  11  is, for example, approximately 50 cm to approximately 1 m 50 cm. One woofer  12   a  is provided substantially the center of the front of the main body  11 . Two squawkers  12   b  and two tweeters  12   c  are provided above the woofer  12   a.    
     On the upper surface of the main body  11 , the operation panel  14  and the main illumination unit  13   a  are provided. The woofer illumination unit  13   d  is provided in the vicinity of the woofer  12   a , and the bottom illumination unit  13   c  is provided at the lower end of the front of the main body  11 . The top illumination unit  13   b  is not provided in this reproduction apparatus  10 . Note that a squawker illumination unit  13   e  and a tweeter illumination unit  13   f  are respectively provided in the vicinity of the squawker  12   b  and the tweeter  12   c.  The squawker illumination unit  13   e  and the tweeter illumination unit  13   f  are controlled in synchronization with the woofer illumination unit  13   d,  for example. 
     The reproduction apparatus  10  illustrated in Parts A and B of  FIG. 3  includes the main body  11  having a quadrangular prismatic shape with a height of approximately 1 m. At the front of the main body  11 , one woofer  12   a  is provided and a squawker and a tweeter are not provided. The operation panel  14  and the main illumination unit  13   a  are provided on the upper surface of the main body  11 , and the woofer illumination unit  13   d  is provided to the woofer  12   a.  The top illumination unit  13   b  and the bottom illumination unit  13   c  are not provided. 
     As shown in  FIG. 4 , the reproduction apparatus  10  shown in  FIG. 3  may be combined with a speaker apparatus  15  having the squawker  12   b  and the tweeter  12   c  thereon to configure the reproduction apparatus  10  of a three-way system. In this case, for example, the main illumination unit  13   a  may be configured on two main bodies  16  of the speaker apparatus  15 . Then, the main illumination unit  13   a  shown in  FIG. 3  may be set as the top illumination unit  13   b.    
     Further, as shown in  FIG. 5 , the reproduction apparatus  10  shown in  FIG. 2  and the reproduction apparatus  10  shown in  FIG. 4  may be combined with each other to configure the reproduction apparatus  10 . For example, the main illumination unit  13   a , the top illumination unit  13   b , the bottom illumination unit  13   c , and the woofer illumination unit  13   d  may be set as shown in  FIG. 5 . 
       FIG. 6  is a block diagram showing a functional configuration example of the reproduction apparatus  10 . The reproduction apparatus  10  includes a communication unit  41 , a storage unit  42 , a content reproduction unit  43 , a display unit  44 , an illumination control unit  45 , an input unit  46 , an oscillator  47 , and a control unit  48 . 
     The communication unit  41  is a communication interface including a communication device for executing data communication with an external apparatus, or the like. The communication unit  41  transmits/receives various types of data to/from the content server  20  or the different reproduction apparatus  10  via a network, under the control of the control unit  48 . As the communication unit  41 , for example, a wireless LAN module such as WiFi or a communication module for short-range wireless communication such as Bluetooth (registered trademark) is mounted. The control unit  48  and the communication unit  41  constitute a transmission unit and a reception unit. 
     The communication unit  41  functions as an acquisition unit that acquires content data (audio data (audio information)) of audio content. Note that a storage medium such as a CD and a USB may be set in the reproduction apparatus  10  and audio data may be read from the storage medium. In this case, the drive, interface, and the like that read audio data function as an acquisition unit. 
     The storage unit  42  is a non-volatile storage device, and includes, for example, an HDD (Hard Disk Drive), a flash memory, or another solid memory. In the storage unit  42 , for example, various types of data such as the content data acquired from the content server  20  or the like, and information (e.g., MAC address and UUID) for identifying the reproduction apparatus  10  are stored. Further, the storage unit  42  stores various programs such as an application for executing the reproduction method according to this embodiment. 
     The content reproduction unit  43  reproduces the content stored in the storage unit  42 . The content reproduction unit  43  drives the display unit  44  and the speaker unit  12  to reproduce video content and audio content. 
     The display unit  44  is a display device using, for example, liquid crystal, EL (Electro-Luminescence), or the like, and displays video content, various GUIs, and the like. In the case where a touch panel is configured as the operation panel  14 , the operation panel  14  and the display unit  44  are integrally formed. 
     The illumination control unit  45  drives the main illumination unit  13   a , the top illumination unit  13   b , the bottom illumination unit  13   c , and the woofer illumination unit  13   d.  The illumination control unit  45  can also be regarded as a part of the illumination unit  13 . 
     The input unit  46  inputs, to the control unit  48 , an operation signal corresponding to the operation input to the operation panel  14 , an operation signal corresponding to the operation via a remote controller, and the like. 
     The oscillator  47  oscillates at a predetermined sampling frequency and generates and output a clock. The clock from the oscillator  47  is transmitted to the control unit  48 , and used as the basis of various operations. 
     The control unit  48  controls the operation of each block of the reproduction apparatus  10 , and executes communication with the content server  20  and the different reproduction apparatus  10 . The control unit  48  has a hardware configuration necessary for a computer, such as a CPU (Central Processing Unit), a memory (RAM (Random Access Memory), ROM (Read Only Memory)). The CPU loads a program (application) according to the present technology stored in the storage unit  42  into the RAM and executes the program, thereby realizing a reproduction method according to the present technology. 
     As the control unit  48 , for example, a PLD (Programmable Logic Device) such as an FPGA (Field Programmable Gate Array) or a device such as an ASIC (Application Specific Integrated Circuit) may be used. 
     In this embodiment, The CPU of the control unit  48  executes a predetermined program, thereby realizing functional blocks of an operation setting unit  51 , a reproduction control unit  52 , a clock counter  53 , a counter control unit  54 , a frequency control unit  55 , and an audio analysis unit  56 . Note that in order to realize each functional block, dedicated hardware such as an IC (integrated circuit) may be appropriately used. 
     The operation setting unit  51  sets, in the case of executing the multi-room reproduction, whether to cause the reproduction apparatus  10  to operate as the master apparatus  10   a  or the slave apparatus  10   b . The operation setting unit  51  typically executes the operation setting in response to an instruction from the portable terminal  30 . 
     The reproduction control unit  52  controls the operation of reproducing content by the content reproduction unit  43 , i.e., the driving operation of the display unit  44  or the speaker unit  12 . Various reproduction control signals including fast forward, skip, and the like are output to the content reproduction unit  43  by the reproduction control unit  52 , on the basis of the operation signal or the like input from the input unit  46 . The content reproduction unit  43  executes reproduction of content on the basis of the reproduction control signal output from the reproduction control unit  52 . 
     Further, the reproduction control unit  52  controls the driving operation of each illumination unit by the illumination control unit  45 . For example, an illumination control signal that controls the illumination pattern and light emission color of LED illumination is output to the illumination control unit  45 . The illumination control unit  45  drives the main illumination unit  13   a , the top illumination unit  13   b , the bottom illumination unit  13   c , and the woofer illumination unit  13   d,  on the basis of the illumination control signal output from the reproduction control unit  52 . Note that in the case where there is an illumination unit (the top illumination unit  13   b , the bottom illumination unit  13   c , the woofer illumination unit  13   d ) that is not set in the reproduction apparatus  10 , the illumination control signal for the illumination unit is invalidated. 
     In this embodiment, multi-room reproduction that is synchronous reproduction of audio content with the different reproduction apparatus  10 , and synchronous control of the illumination unit  13  with the different reproduction apparatus  10  are executed by the reproduction control unit  52 . In this embodiment, the reproduction control unit  52  functions as a synchronization control unit. 
     The clock counter  53  increases the value in accordance with the clock from the oscillator  47 . In this embodiment, by using the value of the clock counter  53 , the multi-room reproduction and synchronous control of the illumination unit  13  are executed. 
     The counter control unit  54  is a block for achieving synchronization between the master apparatus  10   a  and the slave apparatus  10   b.  In the case where the reproduction apparatus  10  is the master apparatus  10   a , in response to an inquiry about the counter value transmitted from the slave apparatus  10   b,  a counter value at the timing of receiving the inquiry is responded by the counter control unit  54 . 
     In the case where the reproduction apparatus  10  is the slave apparatus  10   b , the counter control unit  54  inquires of the master apparatus  10   a  the counter value. For example, a packet for inquiring the counter value is generated, and transmitted via the communication unit  41 . Further, on the basis of the response of the counter value from the master apparatus  10   a,  the clock counter  53  is corrected by the counter control unit  54 . Accordingly, a virtual clock is set in the group, and multi-room reproduction and synchronous control of the illumination unit  13  are realized with high precision. 
     The frequency control unit  55  controls the sampling frequency in accordance with the sampling rate of content. The frequency control unit  55  synchronizes the sampling frequencies of the reproduction apparatuses  10  in the group. Accordingly, the precision of multi-room reproduction and synchronous control of the illumination unit  13  is improved. 
     The audio analysis unit  56  analyzes audio data, and generates illumination control information associated with the audio data. With this illumination control information, the illumination operation of the illumination unit  13  synchronized with the reproduction of the audio content is realized with high precision. For example, various types of illumination with the illumination pattern and illumination color synchronized with rhythm, speed (bpm), tune of the music to be reproduced, changes thereof, and the like are executed. In this embodiment, the audio analysis unit  56  corresponds to a generation unit. 
     As the reproduction apparatus  10 , an arbitrary audio reproduction apparatus (sound reproduction apparatus) including a speaker and an illumination unit may be used. For example, a television apparatus, a PC (Personal computer), an audio video receiver, a video monitor, or a home game machine, or the like may be used. Further, the present technology is applicable to in-vehicle audio or the like mounted on a car. 
     As the content server  20 , for example, a PC, a network compatible HDD (NAS), or the like is used. As the portable terminal  30 , a smartphone is typically used. However, the present technology is not limited thereto, and various PDAs (Personal Digital Assistants) such as a tablet terminal may be used. 
       FIG. 7  is a schematic diagram showing an example of analysis of audio data by the audio analysis unit  56 . The audio analysis unit  56  includes a beat detection unit  58  and a state machine  59 . Audio data (described as MUSIC DATA in  FIG. 7 ) that is acquired from the communication unit  41  or the like and stored in the storage unit  42  is input to the audio analysis unit  56 . 
     The beat detection unit  58  executes beat detection, and timing data is generated. For example, a Fourier transform or the like is executed on audio data, and bass is extracted. Timing data is generated on the basis of the extracted bass component. However, the present technology is not limited thereto, and beat detection may be executed by an arbitrary algorithm. For example, a medium bass or high pitched beat may be used. 
     On the basis of the timing data, the state machine  59  classifies the audio content into a plurality of reproduction states. The reproduction states are stored as, for example, parameters associated with the pattern, speed (bmp), intensity, or the like of the beat in the ROM or the like of the control unit  48  in advance. The method of associating the result of beat detection and the reproduction state with each other is not limited, and the reproduction state corresponding to so-called tune (content of the content) is typically set. For example, the reproduction states are classified in accordance with quiet tune, intense tune, or the like. 
       FIG. 8  is a schematic diagram for describing setting of the reproduction state. For example, a reproduction state  2  is set on the basis of the beat detection result from a start time (t 0 ) of content. Assumption is made that a predetermined duration is defined in each reproduction state and the beat pattern and the like are not changed even after the duration is elapsed. In this case, the reproduction state  2  is looped (loop×2). 
     The beat pattern and the like are changed from a time (t 1 ) at which the second loop is finished, and a reproduction state  8  is set on the basis of the detection result. The beat pattern and the like are further changed from a time (t 2 ) at which the reproduction state  8  is finished, and a reproduction state  10  is set. Even after the duration of the reproduction state  10  is elapsed, the beat pattern and the like are not chanced and the reproduction state  10  is looped. 
     The beat pattern and the like are changed from a time (t 3 ) before the first loop is finished, and a reproduction state  4  is set. The reproduction state is switched in the middle of the duration as described above in some cases. In the example shown in  FIG. 8 , the reproduction state is the reproduction state  2  in a period T 0  and the reproduction state  8  in a period T 1 . Further, it is the reproduction state  10  in a period T 2  and the reproduction state  4  in a period T 3 . In this way, the audio content is classified into a plurality of reproduction states. 
     Next, the state machine  59  sets the illumination pattern corresponding to the reproduction state. As schematically shown in  FIG. 9 , in this embodiment, a plurality of illumination patterns are stored in association with corresponding reproduction states. The illumination pattern is information regarding the pattern for causing the LED or the like of each illumination unit such as the main illumination unit  13   a  to light. As described above, since the reproduction state is set corresponding to the tune or the like, also the illumination patterns is appropriately defined in accordance with the tune or the like. For example, the reproduction state set for intense tune is associated with a flashy illumination pattern. The reproduction state set for quiet tune is associated with a calm illumination pattern. It goes without saying that the present technology is not limited thereto. 
     In the example shown in  FIG. 9 , although illumination patterns A to E are set for reproduction states 1 to N, the number of illumination patterns associated with one reproduction state is not limited. Further, the present technology is not limited to the case where the same number of illumination patterns are associated with each reproduction state. 
     In the example shown in  FIG. 8 , an illumination pattern  2 A is set in the reproduction state  2  in the period T 0 , and an illumination pattern  8   c  is set in the illumination pattern  8  in the period T 1 . Further, an illumination pattern  10 B is set in the reproduction state  10  in the period T 2 , and an illumination pattern  4 D is set in the reproduction state  4  in the period T 3 . 
     The method of selecting the illumination pattern to be actually executed from one or more illumination patterns associated with reproduction states is not limited. For example, an illumination pattern is randomly selected using random numbers. Accordingly, it is possible to prevent, in the case where the same reproduction state is repeatedly set to a place where the same phrase in the music is repeated, the illumination pattern from becoming boring due to the same illumination pattern being selected each time. Further, also in the case where the same music is repeated, it is possible to prevent the illumination effect from being monotonous due to the same illumination pattern being repeated. 
     Each of the one or more illumination patterns may be weighted with a selection probability. Accordingly, it is possible to occasionally execute an illumination pattern having a low selection probability among repetition of illumination patterns to be selected relatively many times, which can be adopted as an effect to excite the user. The method of setting the weighting is not limited, and is set corresponding to the degree of association between the tune and the illumination pattern, for example. 
     As shown in  FIG. 8 , since the illumination pattern is switched each time the reproduction state is changed, very effective illumination synchronized with the reproduction of audio content is realized. Note that for the loop of the same reproduction state, another illumination pattern associated with the same reproduction state may be selected. For example, in the case where there is a sense of unity in a plurality of illumination patterns associated with the same reproduction state, it is possible to experience both dynamic illumination corresponding to the change of the reproduction state and various types of illumination having a sense of unity in the same tune. 
     As shown in  FIG. 7 , the illumination color set in accordance with the illumination pattern. The illumination color is set on the basis of the color theme stored in the ROM or the like of the control unit  48 . The color theme is typically selected by the user via the portable terminal  30 , the operation panel  14  of the reproduction apparatus  10 , or the like. For example, the color theme of the user&#39;s preference (bluish theme color suggestive of sea, reddish theme color suggestive of passion, etc.) is selected. The state machine  59  determines the light emission color (illumination color) of the LED or the like on the basis of the selected color theme. Accordingly, it is possible to provide a user&#39;s favorite viewing experience. 
     In this embodiment, the illumination pattern, the illumination color, the light emission timing, and the light emission speed are generated as illumination control information  65 . The light emission timing is start timing of the illumination pattern, and represents a time (t 0  or t 1  in  FIG. 8 , etc.) at which the reproduction state is changed. The light emission speed will be described with a specific example of the illumination pattern to be described later. 
     Further, as shown in  FIG. 7 , the illumination control information  65  is generated for each of the main illumination unit  13   a , the top illumination unit  13   b , the bottom illumination unit  13   c , and the woofer illumination unit  13   d.  That is, the illumination control information  65  is generated in association with information (classification designation information) for designating each illumination unit. 
     For example, for each reproduction state, one or more illumination patterns for the main illumination unit  13   a , one or more illumination patterns for the top illumination unit  13   b , one or more illumination patterns for the bottom illumination unit  13   c , and one or more illumination patterns for the woofer illumination unit  13   d  are stored. For each illumination unit, the illumination pattern for actually executing illumination is selected from the stored illumination patterns. 
     [Multi-Room Reproduction and Synchronous Control of Illumination Unit] 
       FIG. 10  and  FIG. 11  are each a sequence diagram showing a processing example at the time when multi- room reproduction accompanied by synchronous control of the illumination unit  13  is executed. Although three reproduction apparatuses A to C are illustrated as reproduction apparatuses connected to the home network  1  in  FIG. 10 , the number of reproduction apparatuses is not limited. 
     When the application according to the present technology is activated, the portable terminal  30  generates a search request for discovering the reproduction apparatus  10 , and broadcast it on the home network  1  (Step  101 ). The reproduction apparatuses A to C each transmit, to the portable terminal  30 , a response to the search request (Step  102 ). 
     The reproduction apparatuses A to C that has responded to the search request are displayed on a touch panel (display unit) of the portable terminal  30 . The user selects reproduction apparatuses forming a group, and inputs an instruction of multi-room reproduction (Step  103 ). In this embodiment, the reproduction apparatuses A to C are selected. 
     The master apparatus  10   a  is selected from the reproduction apparatuses selected by the user (Step  104 ). For example, a reproduction apparatus having a high network strength, a reproduction apparatus connected to a global network, or the like is set as the master apparatus  10 a. Further, a reproduction apparatus superior in reproducing content desired by the user is selected as the master apparatus  10   a.  The method of selecting the master apparatus  10   a  is not limited, and the user may designate the master apparatus  10   a.    
     In the example shown in  FIG. 10 , the reproduction apparatus A is selected as the master apparatus  10   a.  The portable terminal  30  transmits a group creation request to the reproduction apparatus A (Step  105 ). The request includes identification information of the reproduction apparatuses B and C to be the slave apparatuses  10   b.  Hereinafter, in some cases, the reproduction apparatus A will be referred to as the master apparatus A, and the reproduction apparatuses B and C will be referred to as the slave apparatuses B and C. 
     The master apparatus A assigns an ID for synchronous control of the illumination unit  13  to each of the reproduction apparatuses A to C forming a group (Step  106 ). For example, the master apparatus A assigns ID=0 to itself to be the master apparatus  10   a,  and respectively assigns ID=1 and 2 to the slave apparatuses B and C. The information assigned as ID, the method of assigning ID, and the like are not limited as long as each of the reproduction apparatuses in the group can be identified. 
     The master apparatus A transmits, to the slave apparatuses B and C, a request for participating in a group (Step  107 ). At this time, the ID assigned to each of the slave apparatuses B and C is transmitted. 
     Accordingly, a group is formed, and the reproduction apparatuses A to C are in a group state (Step  108 ). Further, the slave apparatuses B and C acquire their own IDs. 
     Note that the slave apparatuses B and C that have received the group participation request may request the master apparatus A to notify an ID, and then the master apparatus A may notify the slave apparatuses B and C of IDs. Further, after a group is formed, an ID may be assigned to a slave apparatus whose participation in the group has been confirmed. 
     It is also possible to execute multi-room reproduction by an already formed group. For example, the portable terminal  30  inquires of the reproduction apparatuses A to C that have responded the search request the group state. The group state is information indicating whether or not a group is formed and whether it is the master apparatus  10   a  or the slave apparatus  10   b  in the case where a group is formed. By acquiring the group state, it is possible to grasp the already formed group, and instruct to execute multi-room reproduction. 
     As shown in  11 , the master apparatus A is instructed to execute multi-room reproduction (Step  201 ). The instruction of multi-room reproduction includes an instruction of audio content selected by the portable terminal  30 . The master apparatus A acquires audio data to be reproduced from the content server  20  in the home network  1 , for example, and stores it in the storage unit  42 . 
     The master apparatus A analyzes the audio content (Step  202 ) to generate synchronization control information (Step  203 ). The synchronization control information is information including the audio information and the illumination control information  65  shown in  FIG. 7   
       FIG. 12  is a schematic diagram showing an example of the synchronization control information. In this embodiment, as the synchronization control information, a packet  70  of audio data having a header to which the illumination control information  65  is added is generated. That is, a packet in which the illumination control information  65  is stored in a header unit  71  and an audio data  66  is stored in a data unit  72  is generated. 
     As shown in  FIG. 12 , a time stamp  67  for audio reproduction is stored in the header unit  71 . When the counters (synchronized with each other) of the master apparatus  10   a  and the slave apparatus  10   b  match the time stamp of the packet  70 , the audio data  66  of the data unit  72  is reproduced. 
     Further, an ID table  68  shown in  FIG. 11  is stored in the header unit  71 . The ID table  68  corresponds to apparatus designation information for designating the reproduction apparatus  10  whose illumination is to be controlled. In  FIG. 11 , the ID table  68  in the case where  10  reproduction apparatuses  10  form a group is illustrated. In an ID table  68   a,  all the reproduction apparatuses  10  in the group is instructed. In an ID table  68   b , three reproduction apparatuses  10  are instructed. As described above, in this embodiment, the illumination control information  65  is generated in association with the apparatus designation information. 
     Note that the illumination control information  65  is stored in the header unit  71  of the packet  70  corresponding to the light emission timing. 
     That is, it is stored in the header unit  71  of the packet  70  of the audio data to be reproduced at the time (t 0 , t 1 , or the like) shown in  FIG. 8  at which the reproduction state is changed. That is, the illumination control information  65  is not stored in the packet  70  of the audio data to be reproduced at timing different from the light emission timing. When the audio data reproduced by the packet  70 , the illumination pattern is looped. Note that since an amount of information to be stored in the header unit  71  can be added to the header unit  71 , whether or not the illumination control information  65  is stored can be easily determined. 
       FIG. 13  is a schematic diagram for describing an operation of executing the multi-room reproduction by each of the master apparatus A and the slave apparatuses B and C. The synchronization control information generated by the audio analysis unit  56  of the master apparatus A is stored in a buffer  57  configured in the control unit  48  of the master apparatus A. Further, the synchronization control information is distributed to the slave apparatuses B and C by multicast or unicast via the communication unit  41  (Step  204  in  FIG. 11 ). The pieces of synchronization control information transmitted to the slave apparatuses B and C are stored in the buffers  57  of the slave apparatuses B and C. 
     The master apparatus A and the slave apparatuses B and C each execute audio reproduction when virtual clocks (clock counters) held by themselves match the time of the time stamp added to the audio data stored in the buffer  57 . That is, a reproduction control signal is generated by the reproduction control unit  52  shown in  FIG. 6 , and output to the content reproduction unit  43 . Then, the content reproduction unit  43  drives the speaker unit  12 , and the audio content is reproduced (Step  205 ). 
     In the case where the ID table  68  and the illumination control information  65  are added to the header unit  71 , the reproduction control unit  52  of each of the master apparatus A and the slave apparatuses B and C compares the ID designated by the ID table  68  and the ID of its own. In the case where the IDs match with each other, illumination control corresponding to the illumination pattern and the illumination color is executed in accordance with the light emission timing in the synchronous control signal. 
     That is, the reproduction control unit  52  generates an illumination control signal, and output to the illumination control unit  45 . Then, the illumination control unit  45  drives each illumination unit of the illumination unit  13  (the same Step  205 ). 
     For example, in the case where all the reproduction apparatuses  10  are designated, the illumination units  13  of all the reproduction apparatuses  10  emit light in synchronization. Further, for example, in the case where the loop of the same reproduction state continues, by sequentially transmitting the illumination control information including the same illumination pattern with a fixed time difference while changing the IDs, it is possible to cause the reproduction apparatuses  10  to sequentially emit light in the same illumination pattern like a troll. By setting the ID for illumination control as described above, it is possible to execute various types of illumination control. Note that it is also possible to always cause all the reproduction apparatuses  10  to execute the same illumination control without assigning the IDs. 
     Note that in  FIG. 11 , a case where transmission of the synchronization control information and audio reproduction (illumination control) are executed a plurality of times is illustrated, and the 
     Steps are denoted by the same reference symbols ( 204  and  205 ). 
       FIG. 14  to  FIG. 18  are each a schematic diagram for describing an example of the illumination pattern included in the synchronization control information.  FIG. 14  and  FIG. 15  are each a schematic diagram for describing an example of a basic illumination pattern. 
     In  FIG. 14 , the ON/OFF states of four LEDs  81  to  84  being changed in four stages along the time axis are illustrated. For example, in a pattern  00 , all the four LEDs Si to  84  blink four times while being in the ON-states. In a pattern  13 , the left end LED  81  to the right end LED  84  sequentially enter the ON-states. 
     In  FIG. 14, 16  basic illumination patterns are illustrated. By reversing the ON/OFF states of each LED, further  16  illumination patterns are realized. Further, by reversing the right and left in the figure, further  16  illumination patterns are realized. Further, by reversing the order of illumination change along the time axis, i.e., the orientation of the time axis in the figure, further  16  illumination patterns are realized. Some of them have the same pattern. However, approximately  60  basic illumination patterns are realized. 
       FIG. 15  shows an example of the basic illumination pattern realized by three LEDs  85  to  87 . Also in the case where three LEDs are used, approximately  60  basic illumination patterns are realized. 
       FIG. 16  to  FIG. 18  are each a schematic diagram showing an example of the light emission pattern in the ON-state. As the ON-state shown in  FIG. 14  and  FIG. 15 , for example, various light emission patterns shown in  FIG. 16  to  FIG. 18  can be set. Note that no light is emitted in the OFF-state. 
     In the light emission pattern shown in FIG.  16  to  FIG. 18 , the turning ON/OFF of the LED and the light emission amount is appropriately controlled with respect to a predetermined light emission time (0 to 1000 in this example). The predetermined light emission time is not limited, and is appropriately set in accordance with, for example, intervals of illumination change in the basic illumination pattern in  FIG. 14  and  FIG. 15 . It goes without saying that the present technology is not limited thereto. 
     In the ambient of a pattern  01 , the light emission amount increases from the start of the light emission time to the intermediate time and decreases from the intermediate time to the end. In patterns  02  to  14 , the turning ON/OFF of the LED are appropriately combined. In each pattern, the timing of turning ON/OFF, and the lengths of the ON-time and OFF-time are appropriately set. 
     In patterns  15  to  30 , the light emission amount decrease in accordance with the switching timing from ON to OFF. That is, the LED is faded out in accordance with the switching timing to OFF. It goes without saying that a pattern in which the LED is faded in in accordance with the switching timing and then turned OFF at a stretch, and the like are conceivable. 
     In this embodiment, the basic illumination patterns illustrated in  FIG. 14  and  FIG. 15  and the light emission patterns in the ON-state shown in  FIG. 16  to  FIG. 18  are combined to generate an illumination pattern as the synchronization control information. The same light emission pattern may be set in all the ON-state of one illumination pattern, or different light emission patterns may be set. Further, the light emission pattern may be set for each LED. Accordingly, it is possible to realize various illumination patterns, and various types of illumination are realized. 
     The basic illumination pattern and the light emission pattern in the ON-state are not limited to those shown in the figures, and may be arbitrarily set. Further, the illumination pattern may be defined by a method different from the combination of the basic illumination pattern and the light emission pattern in the ON-state. 
     The light emission speed included in the synchronization control information corresponds to the interval of illumination change in the basis light emission pattern shown in  FIG. 13  or the like. In the case where the light emission speed is high, the interval of illumination change is short and very flashy illumination is obtained. In the case where the light emission speed is low, the interval of illumination change is long and a quiet atmosphere is created by gentle illumination change. 
     Note that the light emission time of the light emission pattern in the ON-state is also appropriately set in accordance with the light emission speed. For example, in the case where the light emission speed is high, the light emission time of the light emission pattern is set to be short accordingly. In the case where the light emission speed is low, the light emission time is set to be long accordingly. This makes it possible to exhibit various illumination effects. 
     The light emission speed is determined on the basis of, for example, the interval, speed (bmp), intensity, and the like of beat. For example, it is set to be high in the case of intense tune and low in the case of quiet tune. Further, for example, it may be set in a plurality of stages such as a reference speed, a reference speed×2, a reference speed×3, and a reference speed×4. The number of stages is not limited, and a specific numerical value (e.g., millisecond) is also not limited. 
     The light emission color may be arbitrarily set, and examples thereof include the following colors. 
     Blue (0,0,255) 
     Sky (0,150,255) 
     Lime (0,255,0) 
     Aqua (0,255,255) 
     Violet (120,0,255) 
     Red (255,0,0) 
     Orange (255,140,0) 
     Yellow (255,255,0) 
     Fuchsia (255,0,255) 
     White (255,255,255) 
     Peach (255,128,128) 
     tightBlue (128,128,255) 
     Brown (165,42,42) 
     Olive (192,192,0) 
     Green (0,128,0) 
     Navy (0,0,128) 
     Note that the numerical values in parentheses are gradation values from 0 to 255 of (R, G, B). It goes without saying that the colors are not limited to these gradation values and the method of defining the light emission color is not limited. An arbitrary color may be set as the illumination color, and the illumination color may be realized by an arbitrary method. 
     As described above, in the content reproduction system  100  according to this embodiment, the illumination control information  65  associated with the audio data  66  is generated. The synchronization control information (packet  70 ) including the generated illumination control information  65  and the audio data  66  is transmitted to the different reproduction apparatus  10 . Accordingly, it is possible to execute, on the basis of the synchronization control information, synchronous reproduction (multi-room reproduction) of audio content and synchronous control of the illumination unit  13 . As a result, it is possible to provide a viewing experience with high quality to a user. 
     As a presentation function of livening up the party scene, not only powerful audio reproduction but also the function of reproducing the LED illumination or the like mounted on the main body in accordance with music is very effective. As described above, the audio signal to be reproduced is analyzed by the CPU or the like of the main body in real time, and the illumination pattern and the light emission timing are determined each time. Accordingly, it is possible to execute illumination control synchronized with reproduction of audio content with high precision. 
     In general, music often has a certain melody pattern to be periodically repeated. Therefore, if the same algorithm is used for determining the illumination pattern, the same lighting will be executed each time. For this reason, although it is a special party performance, there is a high possibility that the user gets bored. In this embodiment, as described above, random numbers are incorporated in a part of the algorithm, which prevents the same illumination pattern from being selected every time. As a result, it is possible to sufficiently prevent the excitement and uplifting feeling from cooling down. 
     Note that also in the case where only audio data is transmitted from the master apparatus  10   a  to the slave apparatus  10   b , each reproduction apparatus  10  executes audio analysis, and illumination information is generated, it is possible to provide a fun viewing experience. However, with this method, there is a possibility that deviation of random numbers adopted in the algorithm, timing of analyzing the audio data, and the like occur. In this case, even in the case where the same song is analyzed, the illumination pattern, color, and light emission timing to be determined differ in the reproduction apparatuses  10 . That is, there is a possibility that the precision of synchronous control of the illumination unit  13  is reduced. 
     In this embodiment, the synchronization control information generated by the master apparatus  10   a  is transmitted to each slave apparatus  10   b.  The slave apparatus  10   b  executes audio reproduction and drives the illumination unit  13  on the basis of the received synchronization control information. As a result, synchronous control of the illumination unit  13  with very high precision is realized, and it is possible to provide a viewing experience with high quality. For example, it is possible to obtain a high-presence party experience close to the atmosphere of a live show venue where artists actually appear. 
     Further, in this embodiment, as shown in  FIG. 8  and the like, the illumination control information is generated at the timing when the reproduction state is changed, and no illumination control information is generated in the case of the loop in which the reproduction state is not changed. Therefore, it is possible to sufficiently reduce the amount of information of the illumination control information as compared to the audio data. Accordingly, it is possible to add the illumination control information to the header of the packet of the audio data. As a result, since it is possible to execute synchronous control of an illumination unit with only the packet of the audio data, it is possible to easily execute synchronous control and easily manage the data. 
     Note that the present technology is not limited to the case where synchronization control information including audio data and illumination control information is generated as a packet. For example, the present technology is applicable also to a case where audio data and illumination control information are separately distributed. 
     Further, in this embodiment, the main illumination unit  13   a , the top illumination unit  13   b , the bottom illumination unit  13   c , and the woofer illumination unit  13   d  are set in each reproduction apparatus  10 . For example, as the plurality of reproduction apparatuses  10  forming a group, apparatuses of different models are often used. For example, there may be the slave apparatus  10   b  of a model different from that of the master apparatus  10   a.    
     Therefore, a plurality of illumination groups are classified on the basis of physical positions, and illumination control information is generated for each illumination group. Accordingly, synchronous control between the main illumination units  13   a , synchronous control between the woofer illumination units  13   d,  and the like can be executed even in apparatuses of different models. That is, it is possible to improve the sense of unit through synchronous control of the illumination unit, and make the atmosphere uniform. 
     Other Embodiments 
     The present technology is not limited to the above-mentioned embodiment, and various other embodiments can be realized. 
     For example, the illumination control information for realizing the synchronous control of the illumination unit, the generation method therefor, and the like are not limited. For example, not only the above-mentioned beat detection but also the music elements such as the volume, rhythm, and the like of audio data may be analyzed, and illumination control information including an illumination pattern and an illumination color suitable therefor may be generated. 
     Further, for example, illumination control information may be generated on the basis of the states of the reproduction apparatuses forming a group. For example, when forming a group, information regarding the volume value of each reproduction apparatus is acquired. The master apparatus creates illumination control information on the basis of the volume value of its own or the volume value of another slave apparatus. 
     For example, for a reproduction apparatus having a large volume value, illumination control information is generated so that flashy illumination can be obtained. For a reproduction apparatus having a small volume, illumination control information is generated so that calm illumination can be obtained. 
     Further, illumination control information may be generated on the basis of the installation environment of each reproduction apparatus. The information regarding the installation environment is transmitted from a slave apparatus or appropriately input by a user, for example. For example, flashy illumination is obtained for a reproduction apparatus installed in the main venue, and calm illumination is obtained for a reproduction apparatus installed in a space where the user rests. Alternatively, bluish illumination is obtained for a reproduction apparatus installed in the waterside, and reddish illumination is obtained for a reproduction apparatus installed near the flame. By taking the state of the reproduction apparatus into consideration as described above, it is possible to provide a viewing experience with high quality. 
     The reproduction method by the master apparatus described above may be executed by the cooperation of the master apparatus and another computer or the like. For example, execution of each process included in the reproduction method includes causing another computer or the like to execute a part or all of the processing and acquiring the result. That is, the present technology is applicable also to the configuration of cloud computing in which the processing is shared by a plurality of apparatuses and executed in cooperation with each other. 
     At least two features of the above-mentioned features according to the present technology may be combined. That is, various features described in each embodiment may be arbitrarily combined without distinguishing the embodiments with each other. Further, the various effects described above are merely examples and are not limited, and additional effects may be exerted. 
     It should be noted that the present technology may take the following configurations. 
     (1) A reproduction apparatus capable of executing synchronous reproduction of audio content with a different reproduction apparatus, the reproduction apparatus including: 
     an illumination unit; 
     an acquisition unit that acquires audio information; 
     a generation unit that generates illumination control information associated with the acquired audio information; 
     a transmission unit that transmits, to the different reproduction apparatus, synchronization control information that includes the audio information and the illumination control information; and 
     a synchronization control unit that executes synchronous reproduction of the audio content with the different reproduction apparatus and synchronous control of the illumination unit, on a basis of the synchronization control information. 
     (2) The reproduction apparatus according to (1), in which 
     the generation unit generates, as the synchronization control information, a packet of the audio information, the packet having a header to which the illumination control information is added. 
     (3) The reproduction apparatus according to (1) or (2), in which 
     the generation unit generates the illumination control information by analyzing the acquired audio information. 
     (4) The reproduction apparatus according to any one of (1) to (3), in which 
     the illumination control information includes a plurality of illumination patterns and start timings of the plurality of illumination patterns. 
     (5) The reproduction apparatus according to (4), in which 
     the illumination control information includes an illumination color. 
     (6) The reproduction apparatus according to (4) or (5), in which 
     the generation unit classifies the audio content into a plurality of reproduction states on a basis of the audio information, and associates the plurality of reproduction states with illumination patterns. 
     (7) The reproduction apparatus according to (6), in which 
     the generation unit classifies the plurality of reproduction states on a basis of beat included in the audio content. 
     (8) The reproduction apparatus according to any one of (1) to (7), in which 
     the generation unit generates the illumination control information in association with apparatus designation information for designating the different reproduction apparatus. 
     (9) The reproduction apparatus according to any one of (1) to (8), in which 
     the generation unit classifies the illumination unit into a plurality of classified illumination units in accordance with predetermined rules, and generates the illumination control information in association with classification designation information for designating each of the plurality of classified illumination units. 
     (10) The reproduction apparatus according to (9), in which 
     the plurality of classified illumination units are classified on a basis of installation positions. 
     (11) The reproduction apparatus according to (9) or (10), in which 
     the plurality of classified illumination units include a main illumination unit, an upper-side illumination unit, a lower-side illumination unit, and a speaker illumination unit. 
     (12) The reproduction apparatus according to any one of (1) to (11), in which 
     the generation unit generates the illumination control information on a basis of a state of the different reproduction apparatus. 
     (13) The reproduction apparatus according to (12), in which 
     the generation unit generates the illumination control information on a basis of volume of the different reproduction apparatus. 
     (14) The reproduction apparatus according to (12) or (13), in which 
     the generation unit generates the illumination control information on a basis of an installation environment of the different reproduction apparatus. 
     REFERENCE SIGNS LIST 
       10  reproduction apparatus 
       10   a  master apparatus 
       10   b  slave apparatus 
       12  speaker unit 
       12   a  woofer 
       12   b  squawker 
       12   c  tweeter 
       13  illumination unit 
       13   a  main illumination unit 
       13   b  top illumination unit 
       13   c  bottom illumination unit 
       13   d  a woofer illumination unit 
       20 ,  21  content server 
       30  portable terminal 
       41  communication unit 
       42  storage unit 
       48  control unit 
       52  reproduction control unit 
       56  audio analysis unit 
       58  beat detection unit 
       59  state machine 
       65  illumination control information 
       66  audio data 
       67  time stamp 
       68  ID table 
       70  packet 
       71  header unit 
       72  data unit 
       100  content reproduction system