JP5640320B2 - Audio reproduction system, audio processing apparatus, and audio processing program - Google Patents

Description

  The present invention relates to an audio processing apparatus that reproduces multichannel audio data.

BD (Blue-lay), a source device that conforms to the HDMI standard
2. Description of the Related Art An audio playback system including a Disc) player, an AV amplifier that is a repeater device, and a display device that is a sink device is used. The AV amplifier converts the HDMI data received from the BD 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. . The display device converts the received HDMI data into the original video data and displays it.

  The audio data included in the HDMI data transmitted from the BD player to the AV amplifier is obtained by encoding multichannel audio data. For example, as shown in FIG. 3, the multi-channel audio data includes left audio data L, right audio data R, central audio data C, low frequency audio data LFE, LFE2, surround left audio data Ls, Lsd, and surround right audio data. Rs, Rsd, surround rear left audio data Lrs, surround rear right audio data Rrs, left center audio data Lc, right center audio data Rc, left outer audio data Lw, right outer audio data Rw, upper left audio data Lh, This includes upper right audio data Rh, central upper audio data Ch, surround central audio data Cs, and the like. Note that the multi-channel audio data does not include audio data of all these channels, but includes audio data of a plurality of channels selected from these.

  In consideration of cost and the like, the AV amplifier is not provided with an amplifying unit and a speaker output terminal corresponding to all these channels. For example, the AV amplifier includes an amplification unit for 8 channels such as L, R, C, LFE, Ls, Rs, Lrs, and Rrs and a speaker output terminal, and the remaining channels Lw, Rw, Lc, Rc, and Lh. , Rh, Ch, LFE2, Lsd, Rsd, and Cs are not provided with amplifying units and speaker output terminals. In this case, even when the audio data of these channels is included in the disc, the audio data of these channels cannot be reproduced and the audio cannot be output from the speaker.

JP 2007-288247 A

  The present invention has been made to solve the above-described conventional problems, and an object of the present invention is to include audio data of channels other than channels that can be output to a speaker by a single audio processing device in multi-channel audio data. Even in such a case, it is to provide an audio reproduction system capable of outputting audio data of each channel to a speaker.

  An audio reproduction system according to a preferred embodiment of the present invention includes a first audio processing device and a second audio processing device, wherein the first audio processing device receives multichannel audio data. And a first setting means for storing a channel output from the first sound processing device to a speaker among the plurality of channels, and whether or not the channel stored in the first setting means is included in the multi-channel sound data. First determination means for determining whether or not the channel stored in the multi-channel audio data includes the channel stored by the first setting means, and is included in the multi-channel audio data and the first setting means First reproduction means for outputting to the speaker the audio data of the channel stored by the second audio processing, A second receiving means for receiving multi-channel audio data; a second setting means for storing a channel output from the second audio processing device to a speaker among a plurality of channels; and a second setting means for storing the second in multi-channel audio data. A second determining means for determining whether or not the channel stored by the setting means is included; and a case where it is determined that the channel stored by the second setting means is included in the multi-channel audio data And second reproduction means for outputting the audio data of the channels included in the multi-channel audio data and stored by the second setting means to a speaker.

  Of the channels included in the multi-channel audio data, the audio data of the channels stored in the first setting means is reproduced by the first audio processing device, and the audio data of the channels stored in the second setting means Is reproduced by the second audio processing device. Therefore, even when multi-channel audio data includes audio data of channels other than the channels that one audio processing device can output to the speaker, the audio data of each channel can be output to the speaker.

  An audio reproduction system according to another preferred embodiment of the present invention includes a first audio processing device and a second audio processing device, wherein the first audio processing device receives multichannel audio data. A receiving unit, a first setting unit that stores a channel that the first audio processing device outputs to the speaker among a plurality of channels, and a channel that the second audio processing device outputs to the speaker among the plurality of channels. Second setting means; first determining means for determining whether or not the channel stored in the first setting means is included in the multi-channel audio data; and storing the multi-channel audio data in the first setting means. If it is determined that the selected channel is included, it is included in the multi-channel audio data and is determined by the first setting means. First reproduction means for outputting the audio data of the stored channel to the speaker, and second determination means for determining whether or not the channel stored by the second setting means is included in the multi-channel audio data. If it is determined that the channel stored by the second setting unit is included in the multi-channel audio data, the audio of the channel included in the multi-channel audio data and stored by the second setting unit Transmitting means for transmitting data to the second sound processing device, the second sound processing device receiving second sound means for receiving sound data from the transmitting means, and receiving the received sound data to a speaker. Second reproducing means for outputting.

  In a preferred embodiment, the first sound processing device has second setting means for storing a channel output from the second sound processing device to a speaker among a plurality of channels, and the first setting for multi-channel sound data. A third determination unit that determines whether a channel that is not stored in any of the first setting unit and the second setting unit is included, and any one of the first setting unit and the second setting unit in multi-channel audio data Is determined to include a channel that is not stored in any of the first setting means and the second setting means. 1 further includes mixing means for mixing the audio data of the channel stored by the setting means.

  In this case, among the channels included in the multi-channel audio data, for the audio data of channels that are not stored in either the first setting means or the second setting means, the channels stored in the first setting means Can be reproduced by mixing the audio data.

  In a preferred embodiment, it is determined that the first sound processing apparatus has a normal state and a low power consumption state, and the channel stored in the first setting means is included in multi-channel sound data. If it is determined that the channel stored in the first setting means is not included in the multi-channel audio data, the second audio is transferred to the low power consumption state. When it is determined that the processing device has a normal state and a low power consumption state and the channel stored in the second setting means is included in the multi-channel audio data, the processing device shifts to the normal state, If it is determined that the channel audio data does not include the channel stored by the second setting means, the state shifts to the low power consumption state. .

  In this case, of the first audio processing device and the second audio processing device, the non-reproduced audio processing device shifts to a low power consumption state, so that power consumption can be reduced.

  In a preferred embodiment, the first receiving means receives the first multi-channel audio data and the second multi-channel audio data, and the first audio processing device includes the second audio processing among a plurality of channels. Second setting means for storing a channel output from the apparatus to the speaker, and based on the stored contents of the first setting means and the second setting means, either the first multi-channel sound data or the second multi-channel sound data It further has a selection means for selecting one of them as multi-channel audio data to be reproduced.

  Even when multi-channel audio data includes audio data of channels other than the channels that one audio processing device can output to the speaker, the audio data of each channel can be output to the speaker.

  Hereinafter, an audio playback system including a disk playback device (source device, BD player), an audio processing device (repeater device, AV amplifier), and a display device (sink device) according to a preferred embodiment of the present invention will be described with reference to the drawings. However, the present invention is not limited to these embodiments.

  FIG. 1 is a block diagram showing configurations of the BD player 10 and the AV amplifier 20A, and FIG. 2 is a block diagram showing configurations of the AV amplifier 20B and the display device 40. The BD player 10, the AV amplifiers 20A and 20B, and the display device 40 comply with, for example, the HDMI standard and are connected to each other via an HDMI cable. The BD player 10 transmits the multichannel audio data recorded on the disc to the AV amplifier 20A. The AV amplifier 20A transfers the multichannel audio data to the AV amplifier 20B.

  As shown in FIG. 3, the multi-channel audio data includes left audio data L, right audio data R, central audio data C, low frequency audio data LFE, LFE2, surround left audio data Ls, Lsd, surround right audio data Rs, Rsd, surround back left audio data Lrs, surround back right audio data Rrs, left center audio data Lc, right center audio data Rc, left outside audio data Lw, right outside audio data Rw, upper left audio data Lh, upper right Audio data Rh, upper center audio data Ch, surround central audio data Cs, and the like are included. Note that the multi-channel audio data does not include audio data of all these channels, but includes audio data of a plurality of channels selected from these.

  Each of the AV amplifiers 20A and 20B sets a channel of audio data to be output (that is, reproduced) to the speaker based on a user operation. The AV amplifiers 20A and 20B reproduce the audio data of the channel set for itself among the audio data of each channel included in the multichannel audio data.

  FIG. 4 shows an example of a speaker setting table in the AV amplifier 20A. The AV amplifier 20A decodes and reproduces L, R, C, LFE, Ls, Rs, Lrs, and Rrs among the channels of the multichannel audio data. And output to the speaker. FIG. 5 is an example showing the channel and arrangement of speakers connected to the AV amplifier 20A. The AV amplifier 20A is connected to a left speaker SL, a right speaker SR, a center speaker SC, a low-frequency speaker SLFE, a surround left speaker SLs, a surround right speaker SRs, a surround back left speaker SLrs, and a surround back right speaker SRrs.

  FIG. 6 shows an example of a speaker setting table in the AV amplifier 20B. The AV amplifier 20B decodes and reproduces Lw, Rw, Lc, Rc, LFE2, Lh, Rh, and Ch among the channels of the multichannel audio data. And output to the speaker. FIG. 7 is an example showing the channel and arrangement of speakers connected to the AV amplifier 20B. The AV amplifier 20B is connected to the left outer speaker SLw, the right outer speaker SRw, the left center speaker SLc, the right center speaker SRc, the low-frequency speaker SLFE2, the upper left speaker SLh, the upper right speaker SRh, and the upper center speaker SCh. ing.

  As described above, by connecting the AV amplifiers 20A and 20B to each other and reproducing the audio data of different channels, the audio data of many channels is compared with the case where the audio data is reproduced by only one AV amplifier. Data can be played back.

[Configuration of BD Player 10]
As shown in FIG. 1, the BD player 10 includes a playback unit 11, an HDMI transmission unit 13, a control unit 14, an operation display unit 15, a memory 16, and an output terminal 17.

  The playback unit 11 reads video data and multi-channel audio data recorded on a Blu-ray disc (hereinafter simply referred to as a disc) from the disc, and supplies them to the HDMI transmission unit 13. The HDMI transmission unit 13 converts the video data and multi-channel audio data supplied from the reproduction unit 11 into HDMI standard data (hereinafter referred to as HDMI data), and transmits the data to the AV amplifier 20 via the output terminal 17. .

  The control unit 14 controls each unit of the BD player 10 based on the operation program of the BD player 10 stored in the memory 16, and is, for example, a microcomputer or a CPU. The control unit 14 is connected to the control unit 23A of the AV amplifier 20A via the CEC line, and transmits / receives commands to / from the control unit 23A.

[Configuration of AV Amplifier 20A]
As shown in FIG. 1, the AV amplifier 20A includes an HDMI receiving unit 21A, an HDMI transmitting unit 22A, a control unit 23A, an audio processing unit 25A, a memory 26A, an operation unit 27A, a display unit 28A, and an input. A terminal 29A, an output terminal 30A, and a power supply circuit 31A are provided.

  The memory 26A stores a speaker setting table shown in FIG. The speaker setting table is a table that stores channels that are reproduced by the AV amplifier 20A and output to the speakers among the channels included in the multichannel audio data. The speaker setting table is set by a user operation via the operation unit 27A, but may be automatically set by the control unit 23A.

  The HDMI receiving unit 21A receives the HDMI data transmitted from the BD player 10 via the input terminal 29A, generates original multi-channel audio data from the received HDMI data, and supplies it to the audio processing unit 25A. Further, the HDMI receiving unit 21A supplies the HDMI data transmitted from the BD player 10 to the HDMI transmitting unit 22A as it is.

  The audio processing unit 25A performs predetermined audio processing on the multi-channel audio data supplied from the HDMI receiving unit 21A, and the audio of each channel is connected to the externally connected speaker 60A (corresponding to the speaker of each channel in FIG. 5). Supply signal.

  FIG. 8 is a block diagram showing the configuration of the audio processing unit 25A. The sound processing unit 25A includes a DSP 51A, a DAC (digital-analog converter) 52A, a volume adjustment unit 53A, and an amplification unit 54A.

  The DSP 51A decodes the audio data of the channels stored in the speaker setting table shown in FIG. 4 among the channels of the multi-channel audio data supplied from the HDMI receiving unit 21A. In this example, audio data of each channel of L, R, C, LFE, Ls, Rs, Lrs, and Rrs is decoded. The decoded audio data of each channel is supplied to the DAC 52A.

  The DAC 52A converts the audio data of each channel supplied from the DSP 51A from digital to analog, generates an analog audio signal of each channel, and supplies the analog audio signal to the volume adjustment unit 53A. The volume adjustment unit 53A adjusts the volume value of the analog audio signal of each channel and supplies it to the amplification unit 54A. The amplifying unit 54A amplifies the audio signal of each channel supplied from the volume adjusting unit 53A and outputs it to the speaker of each channel via the speaker output terminal of each channel. Note that the DAC 52A, the volume adjustment unit 53A, the amplification unit 54A, and the speaker output terminals are provided for eight channels in this example.

  As illustrated in FIG. 1, the HDMI transmission unit 22A transmits the HDMI data supplied from the HDMI reception unit 21 to the AV amplifier 20B via the output terminal 30A.

  The control unit 23A controls each unit of the AV amplifier 20A based on the operation program of the AV amplifier 20A stored in the memory 26A, and is, for example, a microcomputer or a CPU. The control unit 23A is connected to the control unit 14 of the BD player 10 via the CEC line, and transmits / receives commands to / from the control unit 14. The control unit 23A is connected to the control unit 23B of the AV amplifier 20B via the CEC line, and transmits / receives commands to / from the control unit 23B.

  The control unit 23A acquires the speaker setting table of the AV amplifier 20B shown in FIG. 6 from the control unit 23B of the AV amplifier 20B via the CEC line, and stores it in the memory 26A. The speaker setting table of the AV amplifier 20B is used in each process described later. Further, when the speaker setting table of the AV amplifier 20A shown in FIG. 4 is set by the user operation, the control unit 23A transmits the speaker setting table to the control unit 23B of the AV amplifier 20B via the CEC line.

  The display unit 28A displays a speaker setting table and other setting contents, and is an FL tube, an LCD, or the like. The power supply circuit 31A supplies a power supply voltage to each part of the AV amplifier 20A.

[Configuration of AV Amplifier 20B]
As shown in FIG. 2, the AV amplifier 20B includes an HDMI receiving unit 21B, an HDMI transmitting unit 22B, a control unit 23B, an audio processing unit 25B, a memory 26B, an operation unit 27B, a display unit 28B, and an input. A terminal 29B, an output terminal 30B, and a power supply circuit 31B are provided.

  The memory 26B stores a speaker setting table shown in FIG. The speaker setting table is a table that stores channels that are reproduced by the AV amplifier 20B and output to the speakers among the channels included in the multichannel audio data. The speaker setting table is set by a user operation via the operation unit 27B, but may be automatically set by the control unit 23B. Typically, the speaker setting table of FIG. 6 stores a channel different from that of the speaker setting table of FIG.

  The HDMI receiving unit 21B receives the HDMI data transmitted from the AV amplifier 20A via the input terminal 29B, generates original multichannel audio data from the received HDMI data, and supplies the original multichannel audio data to the audio processing unit 25B. Also, the HDMI receiving unit 21B generates original video data from the HDMI data and supplies the generated video data to the HDMI transmitting unit 22B.

  The audio processing unit 25B performs predetermined audio processing on the multichannel audio data supplied from the HDMI receiving unit 21B, and outputs the audio signal of each channel to the externally connected speaker 60B (corresponding to each speaker in FIG. 7). Supply.

  FIG. 9 is a block diagram showing a configuration of the audio processing unit 25B. The sound processing unit 25B includes a DSP 51B, a DAC 52B, a volume adjustment unit 53B, and an amplification unit 54B.

  The DSP 51B decodes the audio data of the channels set in the speaker setting table shown in FIG. 6 among the channels of the multi-channel audio data supplied from the HDMI receiving unit 21B. In this example, audio data of each channel of Lw, RW, Lc, RC, LFE2, Lh, Rh, and Ch is decoded. The decoded audio data of each channel is supplied to the DAC 52B.

  The DAC 52B digital-analog converts the audio data of each channel supplied from the DSP 51B, generates an analog audio signal of each channel, and supplies it to the volume adjustment unit 53B. The volume adjustment unit 53B adjusts the volume value of the analog audio signal of each channel and supplies it to the amplification unit 54B. The amplifying unit 54B amplifies the audio signal of each channel supplied from the volume adjusting unit 53B and outputs the amplified audio signal to the speaker of each channel via the speaker output terminal of each channel. In this example, the DAC 52B, the volume adjustment unit 53B, the amplification unit 54B, and the speaker output terminals are provided for eight channels.

  As illustrated in FIG. 2, the HDMI transmission unit 22B converts the video data supplied from the HDMI reception unit 21B into HDMI data, and transmits the converted HDMI data to the display device 40 via the output terminal 30B.

  The control unit 23B controls each unit of the AV amplifier 20B based on the operation program of the AV amplifier 20B stored in the memory 26B, and is, for example, a microcomputer or a CPU. The control unit 23B is connected to the control unit 23A of the AV amplifier 20A via the CEC line, and transmits / receives commands to / from the control unit 23A. The control unit 23B is connected to the control unit 42 of the display device 40 via the CEC line, and transmits and receives commands to and from the control unit 42.

  The control unit 23B acquires the speaker setting table of the AV amplifier 20A shown in FIG. 4 from the control unit 23A of the AV amplifier 20A via the CEC line, and stores it in the memory 26B. The speaker setting table of the AV amplifier 20A is used in each process described later. When the speaker setting table of the AV amplifier 20B shown in FIG. 6 is set by the user operation, the control unit 23B transmits the speaker setting table to the control unit 23A of the AV amplifier 20A via the CEC line.

  The display unit 28B displays a speaker setting table and other setting contents, and is an FL tube, an LCD, or the like. The power supply circuit 31B supplies a power supply voltage to each part of the AV amplifier 20B.

[Configuration of Display Device 40]
As illustrated in FIG. 2, the display device 40 includes an HDMI receiving unit 41, a control unit 42, a display unit 43, a memory 44, an operation unit 45, and an input terminal 46.

  The HDMI receiving unit 41 receives the HDMI data transmitted from the HDMI transmitting unit 22B of the AV amplifier 20B via the input terminal 46, generates original video data from the HDMI data, and supplies the original video data to the display unit 43. The display unit 43 is supplied with video data from the HDMI receiving unit 41, displays video based on the video data, and is an LCD or a CRT.

  The control unit 42 controls each unit of the display device 40 based on an operation program of the display device 40 stored in the memory 44, and is, for example, a microcomputer or a CPU.

[Operation of audio playback system]
[Speaker (channel) setting processing]
FIG. 10 is a flowchart showing speaker setting processing of the control unit 23A of the AV amplifier 20A or the control unit 23B of the AV amplifier 20B. The control unit 23A of the AV amplifier 20A (or AV amplifier 20B, and so on) determines whether or not the speaker setting table shown in FIG. 4 has been set by a user operation (S1). When the speaker setting table is set (YES in S1), the control unit 23A transmits the setting contents of the speaker setting table to the control unit 23B of the other AV amplifier 20B via the CEC line (S2).

  Whether the control unit 23B of the AV amplifier 20B (or AV amplifier 20A, the same applies hereinafter) has received the setting contents of the speaker setting table shown in FIG. 4 from the control unit 23A of the other AV amplifier 20A via the CEC line. Whether or not is determined (S3). When received (YES in S3), the control unit 23B stores the received speaker setting table shown in FIG. 4 in the memory 26B. Thus, the AV amplifiers 20A and 20B store the speaker setting tables of both AV amplifiers 20A and 20B in the memory. Note that both the speaker setting table of the AV amplifier 20A shown in FIG. 4 and the speaker setting table of the AV amplifier 20B shown in FIG. 6 may be set directly in the AV amplifier 20A (and 20B) by a user operation.

[Each setting process]
FIG. 11 is a flowchart showing each setting process of the control unit 23A of the AV amplifier 20A or the control unit 23B of the AV amplifier 20B. In this example, each setting is a volume setting or a delay amount setting by a user operation. The delay amount setting is a setting of a delay time for the video signal of the audio signal or a delay time for the audio signal of the video signal, and is generally called A / V Sync.

  The control unit 23A of the AV amplifier 20A (or AV amplifier 20B, the same applies hereinafter) determines whether the volume or the delay amount has been set by a user operation (S5). When the volume or delay amount is set (YES in S5), the control unit 23A transmits the set content of the volume or delay amount to the control unit 23B of the other AV amplifier 20B via the CEC line (S6). .

  The control unit 23B of the AV amplifier 20B (or AV amplifier 20A, the same applies hereinafter) determines whether or not the volume or delay amount setting content has been received from the control unit 23A of the other AV amplifier 20A via the CEC line. Judgment is made (S7). If received (YES in S7), the control unit 23B sets the volume or delay amount of the AV amplifier 20B to the received volume or delay amount.

  Therefore, when the volume or delay amount is changed by a user operation in one AV amplifier 20, the volume or delay amount of the other AV amplifier 20 is also automatically changed to the same value. Therefore, even when both AV amplifiers 20A and 20B reproduce the audio data of the set channels, they can be reproduced with the same volume and delay amount.

[Audio playback processing]
FIG. 12 is a flowchart showing audio reproduction processing of the AV amplifier 20A and the AV amplifier 20B. Note that S12 indicated by a broken line is a process only for the AV amplifier 20A. The control unit 23A of the AV amplifier 20A (or AV amplifier 20B, the same applies hereinafter) determines whether or not HDMI data is input to the HDMI receiving unit 21A via the input terminal 29A (S11). When input (YES in S11), the HDMI receiving unit 21A and the HDMI transmitting unit 22B transfer the received HDMI data to the other AV amplifier 20B (S12). Accordingly, the same HDMI data is input to the AV amplifiers 20A and 20B.

  The HDMI receiving unit 21A generates multi-channel audio data from the HDMDI data and supplies it to the audio processing unit 25A. The DSP 51A of the audio processing unit 25A decodes the header of the multi-channel audio data, reads the channel information included in the header, and supplies it to the control unit 23A (S13). The control unit 23A analyzes the channel information, and the audio data of the channels set by the AV amplifier 20A (that is, the channels stored in the speaker setting table of FIG. 4) are included in the multichannel audio data. It is determined with reference to the speaker setting table of FIG. 4 (S14).

  When multi-channel audio data includes L, R, C, LFE, Ls, Rs, Lw, and Rw audio data, L, R, C, LFE, Ls, and Rs are set by the AV amplifier 20A. (S14: YES), the control unit 23A instructs the DSP 51A to decode the audio data of the set channel (S15). The DSP 51A decodes L, R, C, LFE, Ls, and Rs from the multichannel audio data (S15). The audio data of these channels is converted into an analog signal by the DAC 52A, the volume is adjusted by the volume adjusting unit 53A, is amplified by the amplifying unit 54A, and the speakers SL, SR, SC, SLFE are connected via the speaker output terminals. , SLs, SRs (S16).

  Similarly, in the AV amplifier 20B, when multi-channel audio data includes L, R, C, LFE, Ls, Rs, Lw, and Rw audio data, Lw and RW are set by the AV amplifier 20B. (S14: YES), the control unit 23B instructs the DSP 51B to decode the audio data of the set channel (S15). The DSP 51B decodes Lw and Rw from the multichannel audio data (S15). The audio data of these channels is converted into an analog signal by the DAC 52B, the volume is adjusted by the volume adjusting unit 53B, amplified by the amplifying unit 54B, and output to the speakers SLw and SRw via the speaker output terminals. (S16).

  When the multi-channel audio data includes L, R, C, LFE, Ls, and Rs audio data, in the AV amplifier 20A, L, R, C, LFE, Ls, and Rs are included in the AV amplifier 20A. The AV amplifier 20A reproduces the audio data of these channels (S15, S16). On the other hand, in AV amplifier 20B, it is determined that none of the channels included in the multi-channel audio data is set in AV amplifier 20B (NO in S14), and AV amplifier 20B does not reproduce the audio data of any channel. .

[Other embodiment 1]
In this example, the AV amplifier 20A does not transfer the HDMI data to the AV amplifier 20B as it is, but only the audio data of the channel set in the AV amplifier 20B (and video data if necessary). Is transmitted to the AV amplifier 20B. As a result, the amount of HDMI data transferred from the AV amplifier 20A to the AV amplifier 20B can be reduced.

  FIG. 13 is a flowchart showing the processing of the AV amplifier 20A. The same processing as that in FIG. The control unit 23A of the AV amplifier 20A analyzes the channel information, and the audio of the channel set in the AV amplifier 20B (that is, the channel set in the speaker setting table in FIG. 6) in the multichannel audio data. Whether or not data is included is determined with reference to the speaker setting table of FIG. 6 (S21).

  When multi-channel audio data includes L, R, C, LFE, Ls, Rs, Lw, and Rw audio data, Lw and RW are set by the AV amplifier 20B (YES in S21). The control unit 23A instructs the DSP 51A to extract the audio data of the set channels Lw and Rw. The DSP 51A extracts Lw and Rw from the multichannel audio data. The audio data of these channels Lw and Rw is converted into HDMI data in the HDMI transmission unit 22A, and the converted HDMI data is transmitted to the AV amplifier 20B. The AV amplifier 20B only needs to reproduce the LW and Rw audio data included in the received HDMI data.

  When the multi-channel audio data includes L, R, C, LFE, Ls, and Rs audio data, the multi-channel audio data does not include the channel set by the AV amplifier 20B. (NO in S21), the AV amplifier 20A does not transmit audio data to the AV amplifier 20B (transmits HDMI data including only video data as necessary).

[Other embodiment 2]
In the above embodiment, audio data of channels that are not set in both the AV amplifiers 20A and 20B cannot be reproduced. In this example, audio data of a channel that is not set in both the AV amplifiers 20A and 20B is reproduced by mixing it with audio data of a channel that is set in the AV amplifier 20A (or AV amplifier 20B).

  FIG. 14 is a flowchart showing the processing of the AV amplifier 20A. The same processing as that in FIG. Note that the processing of the AV amplifier 20B may be the same as the processing of FIG. The control unit 23A of the AV amplifier 20A analyzes the channel information, and in the multi-channel audio data, a channel that is not set in any of the AV amplifiers 20A and 20B (that is, the speaker setting table of FIGS. 4 and 6). It is determined with reference to the speaker setting tables of FIGS. 4 and 6 whether or not the audio data of the channel not set in any of them is included (S31).

  When multi-channel audio data includes L, R, C, LFE, Ls, Rs, Lw, Rw, Lsd, and Rsd audio data, Lsd and Rsd are set in both AV amplifiers 20A and 20B. (S31: YES), the control unit 23A instructs the audio processing unit 25A to decode the Lsd and Rsd audio data and mix it with the audio data of a predetermined channel. For example, referring to FIG. 3, the predetermined channel is set in advance to a channel closest to the channel to be mixed. For example, it is determined that Lsd is mixed with the nearest Ls and Rsd is mixed with the nearest Rs. In the audio processing unit 25A, the DSP 51A decodes the audio data of Lsd and Rsd, and is converted into an analog signal by the DAC 52A. Then, Lsd is mixed with Ls, and Rsd is mixed with Rs. Therefore, an audio signal in which Ls and Lsd are mixed is output to the speaker SLs, and an audio signal in which Rs and Rsd are mixed is output to the speaker SRs. The circuit configuration itself for mixing and outputting the audio signals of a plurality of channels is configured by a known switch circuit or the like.

  If the multi-channel audio data includes L, R, C, LFE, Ls, Rs, Lw, and Rw audio data, channels that are not set in any of the AV amplifiers 20A and 20B are included. (NO in S31), the audio data of each channel is reproduced without mixing.

  In addition, when multi-channel audio data includes L, R, C, LFE, Lw, Rw, Lsd, and Rsd audio data, and Ls and Rs are not included, it is assumed that Lsd is mixed with Ls. Only Lsd is output to the speaker SLs, and only Rsd is output to the speaker SRs, assuming that Rsd is mixed with Rs.

  Also in this example, the AV amplifier 20A may transmit the HDMI data including only the audio data of the channel set in the AV amplifier 20B to the AV amplifier 20B as in the first embodiment.

[Other embodiment 3]
In this example, the AV amplifier 20A (same for the AV amplifier 20B) has a general state and a low power consumption state. The normal state is a state in which the power supply voltage is supplied from the power supply circuit 31A to each part including the amplification unit 54A of the AV amplifier 20A, and the audio data can be amplified and output to the speaker. The low power consumption state is a state in which the power supply voltage is not supplied from the power supply circuit 31A to the amplification unit 54A of the AV amplifier 20A, the operation of the amplification unit 54A is stopped, and the power consumption is reduced. In the low power consumption state, the power supply voltage may not be supplied to the display unit 28A or the like. Even in the low power consumption state, the power supply voltage is supplied to necessary parts such as the control unit 23A. In this example, when the channel set by the AV amplifier 20A is not included in the multi-channel audio data, at least the amplification unit 54A does not need to operate, so that the AV amplifier 20A shifts to the low power consumption state. Reduce power consumption. On the other hand, when the channel set by the AV amplifier 20A is included in the multi-channel audio data, the audio signal of the set channel can be amplified and output to the speaker by shifting to the normal state.

  FIG. 15 is a flowchart showing the processing of the AV amplifier 20A (and AV amplifier 20B, the same applies hereinafter), and the same processing as in FIG. The control unit 23A of the AV amplifier 20A analyzes the channel information, and the audio of the channel set in the AV amplifier 20A (that is, the channel set in the speaker setting table in FIG. 4) in the multichannel audio data. Whether or not data is included is determined with reference to the speaker setting table of FIG. 4 (S14).

  When multi-channel audio data includes L, R, C, LFE, Ls, Rs, Lw, and Rw audio data, L, R, C, LFE, Ls, and Rs are set by the AV amplifier 20A. Therefore (YES in S14), the control unit 23A determines whether or not the AV amplifier 20A is in a low power consumption state (S41). Whether the power consumption state is low is determined by determining whether the power supply voltage from the power supply circuit 31A is supplied to the amplifying unit 54A. If the power consumption state is the low power consumption state (YES in S41), the control unit 23A shifts the AV amplifier 20A from the low power consumption state to the normal state (S42), and then changes L, R, C, LFE, Ls, and Rs. Reproduction is performed (S15, S16). On the other hand, if it is not in the low power consumption state (NO in S41), since it is already in the normal state, the control unit 23A regenerates L, R, C, LFE, Ls, Rs (S15, S16).

  When the multi-channel audio data includes Lw and Rw audio data, the channel set by the AV amplifier 20A is not included (NO in S14), and therefore the control unit 23A has the AV amplifier 20A low. It is determined whether or not it is in a power consumption state (S43). If not in the low power consumption state (NO in S43), the control unit 23A shifts the AV amplifier 20A from the normal state to the low power consumption state (S44), and ends the process. On the other hand, if it is a low power consumption state (YES in S43), the process is terminated.

  As described above, the AV amplifier 20 that does not include the channel set in the AV amplifier 20 in the multi-channel audio data and does not need to output the audio data to the speaker, shifts to the low power consumption state. Power consumption can be reduced.

  Also in this example, the AV amplifier 20A may transmit the HDMI data including only the audio data of the channel set in the AV amplifier 20B to the AV amplifier 20B as in the first embodiment.

[Other embodiment 4]
This example is a modification of the other embodiment 3, and the AV amplifier 20A determines whether or not the channel set by the AV amplifier 20B is included in the multichannel audio data. The AV amplifier 20B is instructed to shift to the low power consumption state. FIG. 16 is a flowchart showing the processing of the AV amplifier 20A. The same processing as in FIG. FIG. 17 is a flowchart showing the processing of the AV amplifier 20B.

  As shown in FIG. 16, the control unit 23A of the AV amplifier 20A analyzes the channel information and sets the channel set by the AV amplifier 20B (that is, set in the speaker setting table of FIG. 6) in the multichannel audio data. It is determined with reference to the speaker setting table of FIG. 6 whether or not the audio data of the channel being included is included (S51).

  When multi-channel audio data includes L, R, C, LFE, Ls, Rs, Lw, and Rw audio data, Lw and RW are set by the AV amplifier 20B (YES in S51). The control unit 23A transmits an instruction to shift to the normal mode to the control unit 23B of the AV amplifier 20B via the CEC line (S52). On the other hand, if the multi-channel audio data includes L, R, C, LFE, Ls, and Rs audio data, the channel set by the AV amplifier 20B is not included (NO in S51). The unit 23A transmits an instruction to shift to the low power consumption state to the control unit 23B of the AV amplifier 20B via the CEC line (S53).

  As shown in FIG. 17, the control unit 23B of the AV amplifier 20B determines whether or not an instruction to shift to the low power consumption state is received from the control unit 23A of the AV amplifier 20A via the CEC line. (S61). If received (YES in S61), the control unit 23B shifts the AV amplifier 20B to the low power consumption state (S62). Therefore, useless power consumption can be reduced.

  Further, the control unit 23B of the AV amplifier 20B determines whether or not an instruction to shift to the normal state is received from the control unit 23A of the AV amplifier 20A via the CEC line (S63). If received (YES in S63), the control unit 23B shifts the AV amplifier 20B to the normal state (S64).

  Also in this example, the AV amplifier 20A may transmit the HDMI data including only the audio data of the channel set in the AV amplifier 20B to the AV amplifier 20B as in the first embodiment.

[Other embodiment 5]
In this example, when the AV amplifier 20A receives the first multi-channel audio data and the second multi-channel audio data at the same time, which multi-channel audio data is selected based on the speaker setting table of the AV amplifiers 20A and 20B. Select whether to play channel audio data.

  For example, when the first multi-channel audio data includes L, R, C, LFE, Ls, Rs, Lw, and Rw, and the second multi-channel audio data includes L, R, C, LFE, Ls, and Rs The control unit 23A of the AV amplifier 20A refers to the speaker setting tables of FIGS. 4 and 6 and selects the first multi-channel audio data as audio data to be reproduced. Therefore, L, R, C, LFE, Ls, and Rs are reproduced by the AV amplifier 20A, and Lw and Rw are reproduced by the AV amplifier 20B. On the other hand, when Lw and Rw are not set in the speaker setting table of FIG. 6, the control unit 23A of the AV amplifier 20A selects the second multi-channel audio data as audio data to be reproduced. Accordingly, L, R, C, LFE, Ls, and Rs are reproduced by the AV amplifier 20A. In the second multi-channel audio data, since Lw in the first multi-channel audio data is mixed with L and Rw may be mixed with R, the second multi-channel audio data is reproduced. Thus, the components of Lw and Rw can also be reproduced.

  Also in this example, the AV amplifier 20A may transmit the HDMI data including only the audio data of the channel set in the AV amplifier 20B to the AV amplifier 20B as in the first embodiment.

  As mentioned above, although preferable embodiment of this invention was described, this invention is not limited to these embodiment. The HDMI data from the BD player 10 may be directly supplied to the AV amplifiers 20A and 20B. The program may be provided in the form of a program for causing a computer to execute the above operation of the AV amplifier and a recording medium on which the program is recorded. Further, a program for only a part of the operation of the AV amplifier may be provided to the AV amplifier in the form of firmware update. Further, it may be provided in the form of an electronic component such as a DSP or a microcomputer in which a program for only a part of the above operation of the AV amplifier is stored.

  The present invention can be suitably employed in an AV amplifier or the like.

2 is a block diagram showing a BD player 10 and an AV amplifier 20A. FIG. 3 is a block diagram showing an AV amplifier 20B and a display device 40. FIG. It is a figure which shows the position of the channel contained in multichannel audio | voice data. It is a figure which shows the speaker setting table set to AV amplifier 20A. It is a figure explaining arrangement | positioning of the speaker connected to AV amplifier 20A. It is a figure which shows the speaker setting table set to AV amplifier 20B. It is a figure explaining arrangement | positioning of the speaker connected to AV amplifier 20B. It is a block diagram which shows the structure of audio | voice processing apparatus 25A. It is a block diagram which shows the structure of the audio | voice processing apparatus 25B. It is a flowchart which shows a speaker setting process. It is a flowchart which shows each setting process. It is a flowchart which shows an audio | voice reproduction | regeneration process. It is a flowchart which shows an audio | voice reproduction | regeneration process. It is a flowchart which shows an audio | voice reproduction | regeneration process. It is a flowchart which shows an audio | voice reproduction | regeneration process. It is a flowchart which shows an audio | voice reproduction | regeneration process. It is a flowchart which shows the process which transfers to a normal state or a low power consumption state.

10 BD player 20A, 20B AV amplifier 21A, 21B HDMI receiving unit 22A, 22B HDMI transmitting unit 23A, 23B Control unit 25A, 25B Audio processing unit 26A, 26B Memory 27A, 27B Operation unit 28A, 28B Display unit 29A, 29B Input terminal 30A, 30B Output terminal 31A, 31B Power supply circuit 40 Display device

Claims (7)

A first audio processing device and a second audio processing device;
A first receiving means for receiving multi-channel audio data by the first audio processing device;
Transmitting means for transmitting the multi-channel audio data as it is to the second audio processing device;
First setting means for storing a channel output from the first audio processing device to a speaker among a plurality of channels;
A first determining means for determining whether contains channels stored by said first setting means to said multi-channel audio data,
Wherein if it is determined that the multi-channel are stored in the audio data by said first setting means channel is included, voice channels stored by said included in the multichannel audio data and said first setting means First reproducing means for outputting data to a speaker;
A second receiving means for receiving the multi-channel audio data from the transmitting means of the first sound processing apparatus ;
Second setting means for storing a channel output from the second audio processing device to a speaker among a plurality of channels;
A second determination means for determining whether or contains channels stored by said second setting means to the multi-channel audio data,
Wherein if it is determined to contain a channel stored by the multichannel audio data second setting means, it said included in the multichannel audio data and the second audio channel stored by the setting means And a second reproduction means for outputting data to a speaker. The first sound processing device has a normal state and a low power consumption state;
Wherein if it is determined to contain a channel stored by the multi-channel audio data in said first setting means, and shifts to the normal state, are stored by said first setting means to said multi-channel audio data If it is determined that the channel is not included, it will transition to a low power state,
The second audio processing device has a normal state and a low power consumption state;
Wherein if it is determined to contain a channel stored by the multichannel audio data second setting means, and shifts to the normal state, are stored by said second setting means to the multi-channel audio data The audio reproduction system according to claim 1, wherein when it is determined that a channel is not included, the state shifts to a low power consumption state. The first receiving means receives first multi-channel audio data and second multi-channel audio data;
A second setting means for storing a channel output by the second sound processing device to a speaker among the plurality of channels;
Selection means for selecting one of the first multi-channel audio data and the second multi-channel audio data as multi-channel audio data to be reproduced based on the stored contents of the first setting means and the second setting means. further comprising sound reproduction system according to claim 1 or 2. The first audio processor in the sound reproduction system of any of claims 1-3. A voice processing program for causing a computer to execute each means of the first voice processing device according to claim 4 . The second audio processing device in the audio reproduction system according to claim 1. A voice processing program for causing a computer to execute each means of the second voice processing device according to claim 6.

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