JP5109210B2 - CONTENT REPRODUCTION SYSTEM, CONTENT PROCESSING DEVICE, CONTENT REPRODUCTION DEVICE, AND PROGRAM THEREOF - Google Patents

Description

  The present invention relates to a content reproduction system including a content reproduction device and a content processing device.

  Recently, a content playback system including a DVD player (or a Blu-ray disc player or an HDDVD player) that is a content playback device compliant with the HDMI standard and an AV amplifier that is a content processing device has been used and is output from the DVD player. By including video data and audio data in the HDMI data, both video data and audio data can be transmitted to the AV amplifier through a single HDMI cable. The AV amplifier converts the HDMI data received from the DVD player into the original video data and audio data, amplifies the audio data and outputs it to the speaker, converts the video data into HDMI data again, and transmits it to the display device. .

  Audio data is recorded on the DVD disc in a plurality of formats (DolbyDigital, DTS, TrueHD, etc.), sampling frequencies (96 kHz, 192 kHz), and the number of channels (5.1 ch, 7.1 ch). The DVD player transmits the encoded audio data read from the DVD disk to the AV amplifier via the HDMI cable. The AV amplifier decodes the received encoded audio data in the DSP, executes the set acoustic processing, amplifies it by the amplifier unit, and outputs it to the speaker.

JP 2006-33376 A

  Recently, a format with very excellent voice such as TrueHD has appeared as a format of audio data, and a very high sampling frequency such as 192 kHz has appeared. However, if the DSP processing capability is high, the AV amplifier can decode TrueHD and 192 kHz audio data, but if the DSP processing capability is not sufficiently high, the AV amplifier 192 kHz audio data cannot be decoded, and as a result, there is a problem that no sound is output from the speaker. This is because the decoding of TrueHD • 192 kHz audio data exceeds the processing capability of the DSP. In this case, it is necessary to change the audio data output from the DVD player to a format with low sound quality. Here, “decoding is impossible” means that encoded audio data to be received cannot be decoded in real time and decoded so that the sound can be normally output from the speaker.

  Further, if the DSP processing capability is not sufficiently high, the AV amplifier does not execute predetermined sound processing (for example, sound field processing, equalizer processing, delay processing, etc.), TrueHD, 96 kHz, 7.1 ch. The audio data can be decoded. However, the AV amplifier cannot decode TrueHD / 96 kHz / 7.1 ch audio data and cannot execute predetermined acoustic processing. This is because the processing capacity of the DSP is exceeded by combining decoding of TrueHD, 96 kHz, 7.1 ch audio data and predetermined acoustic processing. In this case, it is necessary to change the audio data output from the DVD player to a format with low sound quality, or to set so as not to execute a predetermined acoustic process. Alternatively, it is necessary to design the AV amplifier so that the predetermined acoustic processing is not executed even when the predetermined acoustic processing is set when the TrueHD / 96 kHz / 7.1ch audio data is input.

  In addition, the said patent document 1 describes the following technique. A DVD player and a personal computer are connected to the network. It is determined whether or not the video data of the optical disc inserted into the player can be decoded by the hardware decoding unit inside the player. If it is determined that the video data is not possible, the video data is transmitted to the personal computer via the network. Then, the decoded data is received by the software decoding unit. As a result, video data in a format not supported by the player can be decoded and reproduced only by an operation from the player.

  However, in the technique of Patent Document 1, video data encoded from a DVD player is transmitted to a personal computer, and after the video data is decoded by the personal computer, the video data is returned to the DVD player again. This increases the number of transmission paths and delays the time until video data is displayed.

  An object of the present invention is a content reproduction system including a content reproduction device and a content processing device. Content reproduction that can decode and output content data of content format exceeding the processing capability of the content processing device. It is to provide a system and the like.

  A content reproduction system according to a preferred embodiment of the present invention includes a content reproduction device that reproduces content data, and a content processing device that can be connected to the content reproduction device. The content processing device receives content data encoded from the content reproduction device or content data decoded by the content reproduction device, and encoded content data received by the content reception device. First decoding means for decoding and determination whether the content format of the encoded content data received by the content receiving means is a first predetermined content format that cannot be decoded by the first decoding means And a request transmitting unit that transmits a decoding request to the content reproduction apparatus when the determining unit determines that the content format is the first predetermined content format. When the content reproduction apparatus receives a decoding instruction from the control means, the content processing apparatus receives the second decoding means for decoding the content data and the encoded content data or the content data decoded by the second decoding means. Content transmitting means for transmitting to, request receiving means for receiving the decode request from the content processing device, and when the request receiving means receives the decode request, a decode instruction for decoding content data is provided to the second decode means And the control means for supplying to.

  When the content format of the encoded content data received from the content reproduction device is the first predetermined content format, it is determined that the content data cannot be decoded by the first decoding means. Therefore, the request transmission means transmits a decode request to the content reproduction apparatus. When the request receiving unit receives a decoding request from the content processing apparatus, the control unit supplies a decoding instruction to the second decoding unit, and the second decoding unit decodes the content data. Accordingly, the content data decoded by the content reproduction device is supplied to the content processing device, so that even the first predetermined content format can be decoded by the content reproduction system.

  A content reproduction system according to another preferred embodiment of the present invention includes a content reproduction device that reproduces content data, and a content processing device that can be connected to the content reproduction device. The content processing device receives content data encoded from the content reproduction device or content data decoded by the content reproduction device, and encoded content data received by the content reception device. A first decoding means for decoding; a content processing means for executing one or a plurality of content processes on the content data received by the content receiving means; a process setting means for setting a content process to be processed by the content processing means; The first decoding means decodes the content format of the encoded content data received by the content receiving means if the content processing means does not execute predetermined content processing. The content processing means executes the predetermined content processing and the first decoding means cannot decode the second predetermined content format, and the processing setting means A determination unit configured to determine whether or not the predetermined content processing is set; a content format is a second predetermined content format by the determination unit; and the predetermined content processing is set by the processing setting unit And a request transmission means for transmitting a decode request to the content reproduction apparatus. When the content reproduction apparatus receives a decoding instruction from the control means, the content processing apparatus receives the second decoding means for decoding the content data and the encoded content data or the content data decoded by the second decoding means. Content transmitting means for transmitting to, request receiving means for receiving the decode request from the content processing device, and when the request receiving means receives the decode request, a decode instruction for decoding content data is provided to the second decode means And the control means for supplying to.

  When the content format of the encoded content data received from the content playback apparatus is the second predetermined content format, if the predetermined content processing is set by the processing setting unit, the content data is decoded by the first decoding unit. In addition, it is determined that the predetermined content processing cannot be executed by the content processing means. Therefore, the request transmission means transmits a decode request to the content reproduction apparatus. When the request receiving unit receives a decoding request from the content processing apparatus, the control unit supplies a decoding instruction to the second decoding unit, and the second decoding unit decodes the content data. Accordingly, since the content data decoded from the content reproduction device is supplied to the content processing device, the content reproduction device decodes the audio data even in the second predetermined content format, and the content processing device Can execute content processing.

  In a preferred embodiment, when the content format is a second predetermined content format and the predetermined content processing is set by the processing setting unit, the determination unit is It is determined whether or not the setting has been changed so that the predetermined content processing is not executed, and when it is determined that the setting has been changed so that the predetermined content processing is not executed, the request transmission unit is configured to transmit the content reproduction device When the request receiving unit receives the decode stop request, the control unit supplies a decode stop instruction to stop decoding of content data to the second decoding unit.

  When the content format is the second predetermined content format and the predetermined content processing is set by the processing setting means, the content reproduction device decodes the content data, and the content processing device executes the content processing is doing. At this time, when the processing setting unit changes the setting so that the predetermined content processing is not executed, the content processing device can decode the content data and execute the content processing other than the predetermined content processing. It will be judged. Therefore, the request transmission means transmits a decoding stop request to the content reproduction apparatus. When the request receiving unit receives a decoding stop request from the content processing apparatus, the control unit supplies a decoding stop instruction to the second decoding unit, and the second decoding unit stops decoding the content data. Therefore, the content data encoded by the content reproduction device is supplied to the content processing device, and the content processing device can decode the content data and execute content processing other than the predetermined content processing.

  In a preferred embodiment, the determination unit is configured such that the content format of the encoded content data received by the content receiving unit cannot be decoded by the first decoding unit regardless of the setting of the processing setting unit. It is further determined whether or not the content format is the first predetermined content format, and when the determination unit determines that the content format is the first predetermined content format, the request transmission unit sends the request to the content reproduction apparatus. Send a decode request.

  When the content format of the encoded content data received from the content reproduction device is the first predetermined content format, it is determined that the content data cannot be decoded by the first decoding means. Therefore, the request transmission means transmits a decode request to the content reproduction apparatus. When the request receiving unit receives a decoding request from the content processing apparatus, the control unit supplies a decoding instruction to the second decoding unit, and the second decoding unit decodes the content data. Accordingly, the content data decoded by the content reproduction device is supplied to the content processing device, so that even the first predetermined content format can be decoded by the content reproduction system.

  In a preferred embodiment, the content reproduction device further comprises content determination means for determining whether content data reproduced by the content reproduction device is switched to other content data in response to a user operation. When it is determined that the content data to be played back by the playback device is switched to other content data, the control means supplies a decoding stop instruction to stop decoding of the content data to the second decoding means.

  When the content data to be played back by the content playback device is switched to other content data, the content format of the content data may be changed, and as a result, whether or not the content data can be decoded by the content processing device is changed. There is a possibility. Therefore, once the content reproduction device stops decoding the content data, the content processing device is always supplied with the encoded content data. Therefore, the content processing device determines again the content format of the encoded content data, and if the content data after switching cannot be decoded by the content processing device, it sends a decode request to the content playback device and decodes it by the content processing device. If possible, the content data is decoded by the content processing apparatus.

  Even if the content format of the content data is the first predetermined content format or the content format of the content data is the second predetermined content format and the predetermined content processing is set, the content reproduction system The content data can be decoded.

  Hereinafter, a content reproduction system including a content reproduction apparatus 10 and a content processing apparatus 20 according to preferred embodiments of the present invention will be specifically described with reference to the drawings. However, the present invention is not limited to these embodiments. . The content reproduction device 10 is a DVD player, a Blu-ray disc player, an HDDVD player, a set top box, a tuner device or the like (hereinafter referred to as a DVD player 10). The content processing device 20 is an AV amplifier, an AV receiver, a decoder device, or the like (hereinafter referred to as an AV amplifier 20). In this example, the content data is video (image) data and / or audio data, but the audio data will be described below as an example. That is, for the convenience of explanation, the content of the present invention will be described as voice or sound.

  FIG. 1 is a principal block diagram showing the configuration of the DVD player 10 and the AV amplifier 20. The DVD player 10 and the AV amplifier 20 comply with, for example, the HDMI standard, and are connected to each other via an HDMI cable.

[Configuration of DVD Player 10]
The DVD player 10 includes a reproduction unit 11, a resolution conversion unit 12, an HDMI transmission unit 13, a system control unit 14, an operation display unit 15, a memory 16, and a connector unit 17.

  The playback unit 11 reads video data recorded on a DVD disc (hereinafter simply referred to as a disc) from the disc, and supplies it to the resolution conversion unit 12. In addition, the playback unit 11 reads the encoded audio data recorded on the disc from the disc and supplies it to the HDMI transmission unit 13. Here, the playback unit 11 decodes the encoded audio data when a decode request is transmitted from the system control unit 23 of the AV amplifier 20 to the system control unit 14 and a decode instruction is supplied from the system control unit 14. To the HDMI transmission unit 13. On the other hand, when the decoding request is not transmitted from the system control unit 23 of the AV amplifier 20 to the system control unit 14 or when the decoding stop request is transmitted, the reproducing unit 11 does not decode the encoded audio data. To the HDMI transmission unit 13. This is because the audio data is decoded by the audio processing unit 26 of the AV amplifier 20. The reproduction unit 11 includes an optical pickup, a servo circuit, an MPEG decoder, an audio decoder, etc. (not shown).

  There are a plurality of types of audio formats (content formats) in audio data read from the disc. The audio format means information representing the quality of audio data, and includes the format (DolbyDigital, TrueHD, DTS, etc.), sampling frequency (96 kHz, 192 kHz, etc.), number of channels (5.1 ch, 7.1 ch, etc.), etc. . For example, audio data read from the disc is TrueHD 96 kHz 5.1 ch, TrueHD 96 kHz 7.1 ch, TrueHD 192 kHz 7.1 ch, DTS 96 kHz 5.1 ch, and the like. Here, it is assumed that the reproducing unit 11 can decode audio data of all audio formats.

  The resolution conversion unit 12 determines the resolution of the video data supplied from the reproduction unit 11. In addition, the resolution conversion unit 12 converts the determined resolution of the video data into a resolution set by the user by a command from the system control unit 14. The video data whose resolution has been converted by the resolution conversion unit 12 is supplied to the HDMI transmission unit 13.

  The HDMI transmission unit 13 converts the video data supplied from the resolution conversion unit 12 and the audio data supplied from the playback unit 11 into HDMI standard data (hereinafter referred to as HDMI data) by a command from the system control unit 14. Convert. The HDMI transmission unit 13 transmits the HDMI data to the AV amplifier 20 via the connector unit 17.

  The HDMI transmission unit 13 includes a TMDS line for transmitting and receiving HDMI data (normally there are a plurality of lines, but only one line is shown in FIG. 1 for simplicity), and a hot plug for determining the presence or absence of connection. To the HDMI receiving unit 21 of the AV amplifier 20. The HDMI transmission unit 13 is connected to the HDMI reception unit 21 and the PROM 25 of the AV amplifier 20 via a DDC line for reading authentication information and EDID.

  The system control unit 14 controls the playback unit 11, the resolution conversion unit 12, the HDMI transmission unit 13, the operation display unit 15, the memory 16, and the like based on the operation program of the DVD player stored in the built-in or connected memory. For example, a microcomputer or a CPU is used. The system control unit 14 executes various processes based on an operation input from the operation display unit 15 or a control signal and data from each unit.

  The system control unit 14 is connected to the system control unit 23 of the AV amplifier 20 via the CEC line, and transmits / receives commands and / or data to / from the system control unit 23. Further, the system control unit 14 is connected to the PROM 25 of the AV amplifier 20 via the DDC line, and reads the EDID stored in the PROM 25.

  When the system control unit 14 receives a decode request from the system control unit 23 of the AV amplifier 20 via the CEC line, the system control unit 14 supplies a decoding instruction for decoding the audio data to the reproduction unit 11. When the system control unit 14 receives a decode stop request from the system control unit 23 of the AV amplifier 20 via the CEC line, the system control unit 14 transmits a decode stop instruction for stopping decoding of the audio data to the reproduction unit 11.

  In addition, when the system control unit 14 determines that the audio data read from the disc by the reproduction unit 11 is switched to other audio data in response to a user operation, when the reproduction unit 11 is decoding the audio data, Then, a decoding stop instruction for stopping decoding of the audio data is transmitted to the reproduction unit 11. When switching to other audio data, the audio data format, sampling frequency, and number of channels may be changed, so the AV amplifier 20 detects the encoded audio data format, sampling frequency, and number of channels again. This is because the audio data for which the AV amplifier 20 decodes the audio data or the DVD player decodes the audio data is determined.

  Note that switching to other audio data means that other audio data whose format, sampling frequency, and / or number of channels may be changed is selected and started to be played by a user operation. For example, switching between the DVD menu screen and the main part according to user operation, switching the language of the movie between Japanese and English, switching the audio format (from DTS to TrueHD), etc. Means.

[Configuration of AV amplifier]
The AV amplifier 20 includes an HDMI receiving unit 21, an HDMI transmitting unit 22, a system control unit 23, an operation display unit 24, a memory (EDID PROM, hereinafter referred to as PROM) 25, an audio processing unit 26, and an amplification. Part 27 and connector parts 28 and 29.

  The HDMI receiving unit 21 receives the HDMI data transmitted from the DVD player 10. Further, the HDMI receiving unit 21 generates original video data (video data before HDMI conversion) from the received HDMI data, and supplies the generated video data to the HDMI transmitting unit 22. Further, the HDMI receiving unit 21 generates original audio data from the received HDMI data and supplies the original audio data to the audio processing unit 26.

  The HDMI transmitting unit 22 converts the video data supplied from the HDMI receiving unit 21 and the audio data supplied from the audio processing unit 26 as necessary into HDMI data. The HDMI transmission unit 22 transmits the HDMI data to a display device (not shown) via the connector unit 28.

  For example, a DSP or the like is employed as the audio processing unit 26. The audio processing unit 26 performs processing such as decoding processing and acoustic processing on the audio data supplied from the HDMI receiving unit 21 and supplies the audio data to the amplification unit 27. Further, the audio processing unit 26 periodically decodes a part of the encoded audio data supplied from the HDMI receiving unit 21, and the audio format (format, sampling frequency) included in the information area of the audio data. , Number of channels). The audio processing unit 26 supplies information related to the audio format to the system control unit 23. Further, when the audio processing unit 26 causes the DVD player 10 to decode the audio data, if the decoding stop instruction for stopping the decoding of the audio data is supplied from the system control unit 23, the audio processing unit 26 stops the decoding of the audio data. At this time, the audio data decoded in the DVD player 10 is supplied from the HDMI receiving unit 21 to the audio processing unit 26.

  The audio processing unit 26 cannot decode the audio data because the first predetermined audio format among the plurality of audio formats is insufficient in processing capacity. For example, the audio processing unit 26 cannot decode audio data of, for example, TrueHD • 192 kHz, which is the first predetermined audio format. Here, being unable to decode means that the received voice data is decoded in real time and cannot be decoded so that the voice can be normally output from the speaker. That is, the audio processing unit 26 can decode a part of the audio data in order to detect the audio format of the encoded audio data.

  In addition, the voice processing unit 26 executes one or a plurality of acoustic processes selected and set by the user from the plurality of acoustic processes. Here, acoustic processing (content processing) refers to general processing for performing signal processing on an audio signal. For example, sound field processing, equalizer processing (processing for increasing or decreasing the sound pressure level of a specific frequency), delay processing (setting) For example, a process of delaying audio data according to the speaker distance.

  The audio processing unit 26 can execute only the decoding process for the audio data in the second predetermined audio format, but can decode the audio data in the second predetermined audio format and perform the predetermined acoustic processing. Can not be executed. For example, if it is not set to execute predetermined acoustic processing, the audio processing unit 26 can decode audio data of TrueHD, 96 kHz, 7.1 ch, which is the second predetermined audio format. However, the audio processing unit 26 cannot decode the audio data of TrueHD, 96 kHz, 7.1 ch, which is the second predetermined audio format, and cannot execute predetermined acoustic processing.

  The first predetermined audio format, the second predetermined audio format, and the predetermined acoustic processing are determined according to the processing capability of the audio processing unit 26, respectively. It is determined by the designer of the AV amplifier 20. Each of the first predetermined audio format, the second predetermined audio format, and the predetermined acoustic processing may be one audio format or acoustic processing, or may be a plurality of audio formats or acoustic processing. .

  The amplifying unit 27 amplifies the audio data supplied from the audio processing unit 26 and supplies an audio signal to the speaker 60 connected to the outside.

  Based on an AV amplifier operation program stored in a built-in or connected memory, the system control unit 23 is an HDMI reception unit 21, an HDMI transmission unit 22, an operation display unit 24, a PROM 25, an audio processing unit 26, and an amplification unit. 27 and the like, for example, a microcomputer or a CPU. The system control unit 23 executes various processes based on an operation input from the operation display unit 24 or a control signal and data from each unit.

  The system control unit 23 is connected to the system control unit 14 of the DVD player 10 via the CEC line, and transmits and receives commands and data to and from the system control unit 14.

  The system control unit 23 determines whether or not decoding processing can be performed while the audio processing unit 26 performs acoustic processing in which audio data is set. That is, the system control unit 23 receives the information of the audio format of the audio data from the audio processing unit 26 and is in the first predetermined audio format (TrueHD · 192 kHz) or the second predetermined audio format ( TrueHD, 96 kHz, 7.1 ch) and whether or not predetermined acoustic processing is set.

  If it is determined that the processing capacity of the audio processing unit 26 has been exceeded and processing cannot be performed, the system control unit 23 transmits a decode request to the system control unit 14 of the DVD player 10. In addition, the system control unit 23 transmits a decoding stop instruction to the audio processing unit 26. As a result, since the audio data decoded by the DVD player 10 is supplied to the audio processing unit 26, the audio processing unit 26 does not decode the audio data and executes the set acoustic processing on the audio data. can do.

  Further, since the audio format is the second predetermined audio format (TrueHD, 96 kHz, 7.1 ch) and the predetermined acoustic processing is set, the DVD player 10 is decoding the audio data. When the setting is changed so that the predetermined acoustic processing is not executed by the user operation (when the predetermined acoustic processing is canceled), the audio processing unit 26 decodes the audio data in the second predetermined audio format. It becomes possible to do. Therefore, the system control unit 23 transmits a decode stop request to the system control unit 14 of the DVD player 10 via the CEC line, and transmits a decode command to the audio processing unit 26. Thus, the encoded audio data is supplied to the audio processing unit 26, and the audio processing unit 26 decodes the audio data.

[Operation of content playback system]
The operation of the present invention will be described below with reference to FIGS. Note that, as described above, a case where the first predetermined audio format is only TrueHD • 192 kHz and the second predetermined audio format is only TrueHD • 96 kHz · 7.1 ch will be described as an example.

  FIG. 2 is a flowchart showing processing periodically executed by the AV amplifier 20. FIG. 3 is a flowchart showing the processing of the DVD player 10.

  The processing of the AV amplifier 20 will be described with reference to FIG. The audio processing unit 26 decodes a part of the supplied encoded audio data, detects the format information of the audio data, and supplies the detected format information to the system control unit 23 (S1). When receiving the format information, the system control unit 23 determines whether or not the format is TrueHD (S2).

  If the format is not TrueHD (NO in S2), since the audio format is not the first predetermined audio format or the second predetermined audio format, the audio processing unit 26 decodes and sets the audio data. It is determined that the sound processing can be executed. Accordingly, the system control unit 23 proceeds to S7 without transmitting a decoding request to the DVD player 10, and the audio processing unit 26 decodes the audio data (S7) and executes the set acoustic processing (S8). .

  If the format is TrueHD (YES in S2), the audio format may be the first predetermined audio format or the second predetermined audio format, so the audio format is set according to an instruction from the system control unit 23. The processing unit 26 decodes part of the audio data, detects information on the sampling frequency and the number of channels, and supplies the information to the system control unit 23 (S3). When receiving this information, the system control unit 23 determines whether or not the sampling frequency is 192 kHz (S4). That is, it is determined whether or not the audio format is the first predetermined audio format.

  If the sampling frequency is 192 kHz (YES in S4), it is determined in the audio processing unit 26 that the audio data cannot be decoded (regardless of whether or not the predetermined acoustic processing is executed). Therefore, the system control unit 23 transmits a decode request to the system control unit 14 of the DVD player 10 via the CEC line (S9). Further, the system control unit 23 transmits a decoding stop instruction to stop decoding of the audio data to the audio processing unit 26 (or notifies that decoding is unnecessary).

  Here, the processing of the DVD player 10 will be described with reference to FIG. When the audio data output is started (YES in S11), the system control unit 14 determines whether or not a decode request is received from the system control unit 23 of the AV amplifier 20 via the CEC line (reception is monitored). (S15). When the decoding request is received (YES in S15), the system control unit 14 transmits a decoding instruction to the reproducing unit 11, and the reproducing unit 11 decodes the audio data read from the disk in response to this and supplies it to the HDMI transmitting unit 13. To do. As described above, the reproduction unit 11 can decode the audio data in the first predetermined audio format.

  Returning to FIG. 2, since the audio data is supplied from the HDMI receiving unit 21 as a result of the audio data being decoded by the DVD player 10, the audio processing unit 26 executes the set audio processing ( S8), supplied to the amplifying unit 27. Therefore, even if the sound format of the sound data is the first predetermined sound format, sound can be output from the speaker.

  On the other hand, when the sampling frequency is not 192 kHz (NO in S4), the system control unit 23 determines whether the sampling frequency is 96 kHz and the number of channels is 7.1 ch (S5). That is, it is determined whether the audio format is the second predetermined audio format.

  When the sampling frequency is 96 kHz and the number of channels is 7.1 ch (YES in S5), the system control unit 23 further determines whether or not predetermined acoustic processing is set (S6). When the predetermined acoustic process is set (YES in S6), it is determined that the audio processing unit 26 cannot decode the audio data and execute the predetermined acoustic process. Therefore, similarly to the above, the system control unit 23 transmits a decode request to the system control unit 14 of the DVD player 10 via the CEC line (S9). In addition, the system control unit 23 transmits a decoding instruction to stop decoding to the audio processing unit 26 (or notifies that decoding is unnecessary). As a result, since the audio data is decoded by the playback unit 11 of the DVD player 10, the decoded audio data is supplied from the HDMI receiving unit 21 to the audio processing unit 26. The sound processing unit 26 performs predetermined acoustic processing that has been set on the sound data (S8) and supplies the sound data to the amplification unit 27. Therefore, even if the audio format of the audio data is the second predetermined audio format, the audio can be output from the speaker by executing predetermined acoustic processing.

  On the other hand, when the predetermined acoustic process is not set in S6 (NO in S6), the audio processing unit 26 can decode the audio data, and an audio process other than the predetermined audio process is set. In this case, it is determined that the sound processing can be executed. Therefore, the audio processing unit 26 decodes the audio data without the system control unit 23 sending a decode request to the system control unit 14 (S7), and if necessary, the audio other than the predetermined audio processing that has been set. The process is executed (S8) and supplied to the amplification unit 27.

  In S5, if the sampling frequency is 96 kHz and the number of channels is not 7.1ch (NO in S5), the audio processing unit 26 is not in the first predetermined audio format or the second predetermined audio format. However, it is determined that the audio data can be decoded and any set acoustic processing can be executed. Therefore, the audio processing unit 26 decodes the audio data without transmitting the decoding request to the system control unit 14 (S7), and executes the set acoustic processing as necessary (S8). ) And supplied to the amplification unit 27.

  Next, a case where the audio data read from the disc by the DVD player 10 is switched to other audio data will be described. For example, when switching from the main DVD to the menu screen by a user operation, the audio format of the audio data may be changed. For example, the audio format of the main volume audio data is the first predetermined audio format and cannot be decoded by the audio processing unit 26, but the audio data of the menu screen audio data is the second predetermined audio format even in the first predetermined audio format. It is assumed that the audio processing unit 26 can perform decoding while executing predetermined acoustic processing. In such a case, the decoding in the DVD player 11 is stopped and the audio processing unit 26 is caused to execute the decoding. That is, when the audio data is switched, the audio processing unit 26 decodes a part of the encoded audio data, detects the audio format of the audio data, and the system control unit 23 is set by the audio processing unit 26. It is determined whether or not the audio data can be decoded while executing the current acoustic processing.

  Specifically, as shown in FIG. 3, the system control unit 14 of the DVD player 10 determines (monitors) whether or not the audio data is switched to other audio data in accordance with a user operation (S12). . When the audio data is switched (YES in S12), the system control unit 14 further determines whether or not the playback unit 11 is decoding the audio data (S13). When the reproducing unit 11 is decoding (YES in S13), the system control unit 14 transmits a decoding stop instruction to the reproducing unit 11, the reproducing unit 11 stops decoding, and the encoded audio data is transmitted to the HDMI transmitting unit 13. (S14).

  As a result, even if the decoded audio data is supplied to the audio processing unit 26 before the audio data is switched, the encoded audio data is supplied to the audio processing unit 26 in accordance with the switching of the audio data. . Therefore, as shown in FIG. 2, the audio processing unit 26 decodes a part of the encoded audio data, detects the format information, the sampling frequency, and the number of channels, and the system control unit 23 sets the audio processing unit 26. It is possible to determine whether or not the audio data can be decoded while executing the acoustic processing being performed. For example, when the main screen is switched to the menu screen as in this example, neither the first predetermined audio format nor the second predetermined audio format is used, so the acoustic processing set by the audio processing unit 26 is performed. It is determined that the audio data can be decoded while being executed (NO in S5). As a result, the audio processing unit 26 decodes the encoded audio data without transmitting a decode request to the DVD player 10.

  Subsequently, referring to FIG. 4 and FIG. 5, since the audio format is the second predetermined audio format and the predetermined acoustic processing is set, the audio data is reproduced in the reproducing unit 11 of the DVD player 10. A process when the setting is changed so that a predetermined sound process is not executed by a user operation while is decoded.

  As shown in FIG. 4, the system control unit 23 of the AV amplifier 20 has been changed by a user operation so as not to execute predetermined acoustic processing (that is, changed from predetermined acoustic processing to another acoustic processing, Alternatively, whether or not the predetermined acoustic processing has been canceled (S31), and if the setting is changed so as not to execute the predetermined acoustic processing (YES in S31), the system control unit 23 may Is further determined as to whether TrueHD, 96 kHz, 7.1 ch (second predetermined audio format) (S 32). In other words, it is determined whether or not the audio processing unit 26 can decode the audio data by the change of the sound processing setting even though the audio processing unit 26 can decode the audio data.

  When the audio format is TrueHD · 96 kHz · 7.1 ch (second predetermined audio format) (YES in S32), the system control unit 23 stops decoding to the system control unit 14 of the DVD player 10 via the CEC line. A request is transmitted (S33). In addition, the system control unit 23 supplies a decoding instruction to the audio processing unit 26.

  As shown in FIG. 5, the system control unit 14 of the DVD player 10 determines whether or not a decoding stop request has been received from the system control unit 23 of the AV amplifier 20 via the CEC line (S41). When the request is received (YES in S41), a decoding stop instruction is transmitted to the reproduction unit 11. In response to this, the playback unit 11 stops decoding the audio data and transmits the encoded audio data to the HDMI transmission unit 13 (S42).

  As a result, the audio processing unit 26 receives the encoded audio data, decodes the audio data, executes acoustic processing other than the predetermined acoustic processing set as necessary, and supplies the amplified audio data to the amplification unit 27. . As described above, when the setting of the predetermined acoustic processing is canceled and the audio data in the second predetermined audio format can be decoded by the audio processing unit 26, the decoding in the DVD player 11 is stopped and the audio processing is performed. Decoding can be performed by the unit 26.

  As mentioned above, although preferable embodiment of this invention was described, this invention is not limited to these embodiment. Although the case where the content data is audio data has been described, the same applies to the case where the content data is video data. The actual audio format (format, sampling frequency, number of channels) is not described in the program as in the flowchart of FIG. 2, but the audio format corresponding to the first predetermined audio format and the second predetermined audio format May be managed in a table. The same applies to the predetermined acoustic processing. Further, the above decoding request and decoding stop request may be made not via the CEC line but via another control communication line, IEEE1394, USB, or the like. In addition, for transmission / reception of content data, an HDMI cable is not used, but an arbitrary one such as an optical digital cable may be used. Further, the program may be provided in the form of a program for causing a computer to execute the above operations of the DVD player and AV amplifier, and a recording medium on which the program is recorded.

  The present invention can be suitably employed in DVD players and AV amplifiers.

1 is a block diagram showing a configuration of a DVD player 10 and an AV amplifier 20 according to a preferred embodiment of the present invention. 5 is a flowchart for explaining the operation of the AV amplifier 20. 4 is a flowchart for explaining the operation of the DVD player 10. 5 is a flowchart for explaining the operation of the AV amplifier 20. 4 is a flowchart for explaining the operation of the DVD player 10.

Explanation of symbols

10 DVD player 11 Playback section 11
DESCRIPTION OF SYMBOLS 13 HDMI transmission part 14 Control means 20 AV amplifier 21 HDMI receiving part 23 System control part 26 Audio | voice processing part

Claims (10)

A content reproduction device for reproducing content data, and a content processing device connectable to the content reproduction device,
The content processing apparatus is
Content receiving means for receiving encoded content data or content data decoded by the content playback device from the content playback device;
First decoding means for decoding encoded content data received by the content receiving means;
Determining means for determining whether the content format of the encoded content data received by the content receiving means is a first predetermined content format that cannot be decoded by the first decoding means;
A request transmission unit configured to transmit a decoding request to the content reproduction device when the determination unit determines that the content format is the first predetermined content format;
The content reproduction apparatus is
Second decoding means for decoding the content data when receiving a decoding instruction from the control means;
Content transmitting means for transmitting the encoded content data or the content data decoded by the second decoding means to the content processing device;
Request receiving means for receiving the decode request from the content processing device;
A content reproduction system comprising: the control means for supplying a decoding instruction for decoding content data to the second decoding means when the request receiving means receives the decoding request. A content reproduction device for reproducing content data, and a content processing device connectable to the content reproduction device,
The content processing apparatus is
Content receiving means for receiving encoded content data or content data decoded by the content playback device from the content playback device;
First decoding means for decoding encoded content data received by the content receiving means;
Content processing means for executing one or more content processes on the content data received by the content receiving means;
Processing setting means for setting content processing to be processed by the content processing means;
The first decoding unit can decode the content format of the encoded content data received by the content receiving unit unless the content processing unit executes predetermined content processing. Whether the predetermined content process is executed and the second predetermined content format cannot be decoded by the first decoding means, and the predetermined content processing is set by the process setting means A judging means for judging whether or not
When the determination unit determines that the content format is the second predetermined content format and the processing setting unit determines that the predetermined content processing is set, a decoding request is transmitted to the content reproduction device A request transmission means,
The content reproduction apparatus is
Second decoding means for decoding the content data when receiving a decoding instruction from the control means;
Content transmitting means for transmitting the encoded content data or the content data decoded by the second decoding means to the content processing device;
Request receiving means for receiving the decode request from the content processing device;
A content reproduction system comprising: the control means for supplying a decoding instruction for decoding content data to the second decoding means when the request receiving means receives the decoding request. The determination unit executes the predetermined content processing when the content format is the second predetermined content format and the predetermined content processing is set by the processing setting unit. Determine whether the setting has been changed to prevent
When it is determined that the setting has been changed so that the predetermined content processing is not executed, the request transmission unit transmits a decoding stop request to the content reproduction device,
3. The content reproduction system according to claim 2, wherein, when the request receiving unit receives the decoding stop request, the control unit supplies a decoding stop instruction to stop decoding of content data to the second decoding unit. A first predetermined content in which the content type of the encoded content data received by the content receiving unit is not decodable by the first decoding unit regardless of the setting of the process setting unit. Further determine whether it is a format,
The content reproduction system according to claim 2 or 3, wherein, when the determination unit determines that the content format is a first predetermined content format, the request transmission unit transmits a decode request to the content reproduction device. . The content reproduction device further comprises content determination means for determining whether content data reproduced by the content reproduction device is switched to other content data in response to a user operation,
The control unit supplies a decoding stop instruction to stop decoding of content data to the second decoding unit when it is determined that content data to be played back by the content playback device is switched to other content data. 5. The content reproduction system according to any one of 1 to 4. The content processing apparatus used in the content reproduction system according to claim 1,
Content receiving means for receiving encoded content data or content data decoded by the content playback device from the content playback device;
First decoding means for decoding encoded content data received by the content receiving means;
Determining means for determining whether the content format of the encoded content data received by the content receiving means is a first predetermined content format that cannot be decoded by the first decoding means;
A content processing apparatus comprising: a request transmission unit configured to transmit a decoding request to the content reproduction apparatus when the determination unit determines that the content format is a first predetermined content format. The content processing apparatus used in the content reproduction system according to any one of claims 2 to 5,
Content receiving means for receiving encoded content data or content data decoded by the content playback device from the content playback device;
First decoding means for decoding encoded content data received by the content receiving means;
Content processing means for executing one or more content processes on the content data received by the content receiving means;
Processing setting means for setting content processing to be processed by the content processing means;
The first decoding unit can decode the content format of the encoded content data received by the content receiving unit unless the content processing unit executes predetermined content processing. Whether the predetermined content process is executed and the second predetermined content format cannot be decoded by the first decoding means, and the predetermined content processing is set by the process setting means A judging means for judging whether or not
When the determination unit determines that the content processing is in the second predetermined content format and the processing setting unit determines that the predetermined content format is set, a decoding request is transmitted to the content reproduction device A content processing apparatus comprising request transmission means.   An operation program for a content processing apparatus, which causes a computer to execute each means according to claim 6 or 7. The content playback apparatus used in the content playback system according to any one of claims 1 to 5,
Second decoding means for decoding the content data when receiving a decoding instruction from the control means;
Content transmitting means for transmitting the encoded content data or the content data decoded by the second decoding means to the content processing device;
Request receiving means for receiving the decode request from the content processing device;
A content reproduction apparatus comprising: the control unit that supplies a decoding instruction for decoding content data to the second decoding unit when the request receiving unit receives the decoding request.   An operation program for a content reproduction apparatus, which causes a computer to execute each unit according to claim 9.

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