JP2010278846A - Sound processor and program therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reproduce upper left side sound data and upper right side sound data even when speaker output terminals corresponding to the sound data are not provided. <P>SOLUTION: When it is determined that the upper left side sound data and the upper right side sound data are included in multichannel sound data, left sound data and right sound data are transmitted to a display device, the left sound data is reproduced from a display left speaker, the right sound data is reproduced from a display right speaker, the upper left side sound data is reproduced from a left speaker attached to a ceiling and the upper right side sound data is reproduced from a right speaker attached to the ceiling. On the other hand, when it is determined that the upper left side sound data and the upper right side sound data are not included in the multichannel sound data, the left sound data is reproduced from the left speaker, and the right sound data is reproduced from the right speaker. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an audio processing device that reproduces multi-channel audio data including upper left audio data and upper right audio data.

  An audio playback system including a DVD player, which is a source device compliant with the HDMI standard, an AV amplifier, which is a repeater device, and a display device, which is a sink device, is used, and video data is output as HDMI data output from the source device. In addition, by including the audio data, both the video data and the audio data can be transmitted to the repeater device or the sink device through one 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. . 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 DVD player to the AV amplifier is obtained by encoding multichannel audio data. For example, as shown in FIG. 12, the multi-channel audio data includes left audio data L, right audio data R, central audio data C, low frequency audio data SW, surround left audio data LS, surround right audio data RS, and surround back. 7.1ch multi-channel audio data including left audio data LSB and surround rear right audio data RSB is employed. Recently, Dolby True HD, Dolby Digital
HD (High Definition) related audio formats such as Plus and DTS-HD have appeared, and in these formats, for example, upper left audio data Lh and upper right audio data Rh are further added.

  However, considering the cost problem, the AV amplifier is often not provided with an amplification processing unit and speaker output terminal corresponding to the upper left audio data Lh, the upper right audio data Rh, and the like. Alternatively, even when an amplification processing unit and a speaker output terminal corresponding to these audio data are provided in the AV amplifier, the user often does not connect a speaker corresponding to these audio data to the AV amplifier. As a result, even when these audio data are included in the DVD disc, these audio data cannot be reproduced and the audio cannot be reproduced from the speaker.

  The following technology is described in Patent Document 1 below. In the AV amplifier, the HDMI receiving unit generates original video data and original multi-channel audio data from the HDMI data received from the DVD player, supplies the video data to the HDMI transmitting unit, and supplies the audio data to the audio processing unit. To supply. The audio processing unit decodes the multi-channel audio data, supplies only the central audio data to the HDMI transmission unit, performs D / A conversion on the audio data of other channels, performs amplification processing, and outputs to the speaker. The HDMI transmission unit generates HDMI data from the supplied video data and central audio data, and transmits the HDMI data to the display device. The display device generates original video data and central audio data from the received HDMI data, displays the video, and plays back from a speaker incorporating the central audio data.

  However, Patent Document 1 does not describe the upper left audio data Lh and the upper right audio data Rh.

JP 2007-288247 A

  The present invention has been made in order to solve the above-described conventional problems, and its purpose is when an amplification processing unit and a speaker output terminal corresponding to the upper left audio data Lh, the upper right audio data Rh, etc. are not provided. Alternatively, it is an object of the present invention to provide an audio processing apparatus that can reproduce these audio data from the speaker even when a speaker corresponding to the audio data is not connected.

  An audio processing apparatus according to a preferred embodiment of the present invention includes a display device including a display left speaker and a display right speaker, and a left speaker and a front right side that are disposed on a front left side and above the display left speaker. An audio processing device that can be connected to a right speaker arranged above a display right speaker, wherein upper left audio data and upper right audio data are included in multichannel audio data including at least left audio data and right audio data. Channel determination means for determining whether or not the left upper audio data and the upper right audio data are included in the multi-channel audio data, and the left audio data and the right audio data are transmitted to the display device. And the display left speaker Reproduction control means for reproducing left audio data, reproducing right audio data from the display right speaker, reproducing upper left audio data from the left speaker, and reproducing upper right audio data from the right speaker, When it is determined that the upper left audio data and the upper right audio data are not included in the multi-channel audio data, the reproduction control unit reproduces the left audio data from the left speaker and the right audio data from the right speaker. Let it play.

  The speaker output terminal corresponding to the upper left audio data and the upper right audio data is not provided in the audio processing device, or the speaker output terminal corresponding to these audio data is provided but the speaker is not connected. Even in such a case, the audio data can be reproduced using the display left speaker, the display right speaker, the left speaker, and the right speaker. Moreover, depending on whether left upper audio data and upper right audio data are included, left audio data and right audio data are reproduced from the display left speaker and display right speaker, or reproduced from the left speaker and right speaker. Since it is changed whether or not to perform, these audio data can be reproduced from an appropriate position. Generally, the display left speaker and the display right speaker are inferior in sound quality to the left speaker and the right speaker. Therefore, when the upper left audio data and the upper right audio data are not included, the left audio data and the right audio are displayed. Sound quality can be improved by reproducing data from the left speaker and the right speaker.

  In a preferred embodiment, the display device further comprises display connection determining means for determining whether or not the display device is connected to the sound processing device, and when the display device is determined not to be connected to the sound processing device. The left audio data is reproduced from the left speaker and the right audio data is reproduced from the right speaker regardless of whether the upper left audio data and the upper right audio data are included in the multichannel audio data.

  When the display device is not connected, audio data cannot be reproduced from the display left speaker and the display right speaker. Therefore, even when the upper left audio data and the upper right audio data are included in the multichannel audio data, the main audio is generally reproduced by reproducing the left audio data and the right audio data from the left speaker and the right speaker. It is possible to prevent a problem that the left audio data and the right audio data which are the audio data are not reproduced.

  In a preferred embodiment, when the display device receives a volume setting command, the volume value of audio played from the display left speaker and the display right speaker is set to a volume value included in the volume setting command. When it is determined that the upper left audio data and the upper right audio data are included in the multichannel audio data, a volume setting command including a volume value set in the audio processing device is displayed on the display. Volume control means for transmitting to the apparatus is further provided.

  In this case, the volume value of the sound reproduced from the display left speaker and the display right speaker can be matched with the volume value of the sound reproduced from the left speaker and the right speaker.

An audio processing device according to another preferred embodiment of the present invention includes a display device including a display left speaker and a display right speaker, and a left speaker and a front right side disposed on the left front side and above the display left speaker. A left upper audio data and an upper right audio data in multi-channel audio data including at least left audio data and right audio data. Setting determination means for determining whether the upper left audio data and the upper right audio data are set to be generated from audio data of channels other than
Generation means for generating upper left audio data and upper right audio data from audio data of channels other than upper left audio data and upper right audio data, and upper left from audio data of channels other than upper left audio data and upper right audio data When it is determined that the audio data and the upper right audio data are set to be generated, the left audio data and the right audio data are transmitted to the display device, and the left audio data is reproduced from the display left speaker, Reproduction control means for reproducing right audio data from the display right speaker, reproducing upper left audio data from the left speaker, and reproducing upper right audio data from the right speaker,
When it is determined that the upper left audio data and the upper right audio data are not set to be generated from the audio data of the channels other than the upper left audio data and the upper right audio data, the reproduction control unit is connected to the left speaker. Left audio data is reproduced, and right audio data is reproduced from the right speaker.

  The sound processing apparatus according to still another preferred embodiment of the present invention is a left speaker disposed on the left front side and above the second left speaker, and is disposed on the right front side and above the second right speaker. An audio processing device to which a right speaker, a second left speaker arranged on the front left side, and a second right speaker arranged on the front right side can be connected, and includes multi-channel audio including at least left audio data and right audio data Channel determination means for determining whether the upper left audio data and the upper right audio data are included in the data, and when determining that the upper left audio data and the upper right audio data are included in the multi-channel audio data, Play the upper left audio data from the left speaker, play the upper right audio data from the right speaker, and When the left audio data is reproduced from the second left speaker, the right audio data is reproduced from the second right speaker, and it is determined that the upper left audio data and the upper right audio data are not included in the multichannel audio data, Playback control means for playing back left audio data from the left speaker and playing back right audio data from the right speaker.

  The sound processing apparatus according to still another preferred embodiment of the present invention is a left speaker disposed on the left front side and above the second left speaker, and is disposed on the right front side and above the second right speaker. An audio processing device to which a right speaker, a second left speaker arranged on the front left side, and a second right speaker arranged on the front right side can be connected, and includes multi-channel audio including at least left audio data and right audio data Setting determination means for determining whether the upper left audio data and the upper right audio data are set to be generated from the audio data of channels other than the upper left audio data and the upper right audio data in the data, and the upper left audio data The upper left audio data and the upper right audio data are generated from the audio data of channels other than the upper right audio data. And the upper left audio data from the left speaker when determined to generate the upper left audio data and the upper right audio data from the audio data of the channel other than the upper left audio data and the upper right audio data. The data is reproduced, the upper right audio data is reproduced from the right speaker, the left audio data is reproduced from the second left speaker, the right audio data is reproduced from the second right speaker, the upper left audio data and the upper right audio data are reproduced. If it is determined that the upper left audio data and the upper right audio data are not generated from the audio data of the channels other than the side audio data, the left audio data is reproduced from the left speaker and the right speaker is Playback control means for playing back audio data.

  The speaker output terminal corresponding to the upper left audio data and the upper right audio data is not provided in the audio processing device, or the speaker output terminal corresponding to these audio data is provided but the speaker is not connected. Even in such a case, the audio data can be reproduced using the display left speaker, the display right speaker, the left speaker, and the right speaker.

  DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an audio playback system including a disk playback device (source device, DVD player), an audio processing device (repeater device, AV amplifier) and a display device (sink device, television receiver) according to a preferred embodiment of the present invention will be described. However, the present invention is not limited to these embodiments.

  FIG. 1A is a diagram for explaining an example of the arrangement of the AV amplifier 20, the display device 30, and each speaker in the present embodiment (DVD player 10 is omitted). The display device 30 includes a display unit 32, a display left speaker SLD, and a display right speaker SRD. A display device 30 is connected to the AV amplifier 20 via an HDMI cable. The left speaker SL, the right speaker SR, the center speaker SC, the low frequency speaker SSW, the surround left speaker SLS, the surround right speaker SRS, and the surround back left speaker SLSB. The surround rear right speaker SRSB is connected.

  In this example, the AV amplifier 20 does not include an amplification processing unit and a speaker output terminal corresponding to the upper left audio data Lh and the upper right audio data Rh, which will be described later. Therefore, in FIG. Corresponding speaker is not connected and placed.

  FIG. 1B is a diagram illustrating an arrangement of some speakers in a room. In this example, at least the left speaker SL and the right speaker SR are attached to the ceiling on the left front side of the listener (that is, embedded in the ceiling or suspended from the ceiling). In other words, the left speaker SL is disposed on the front left side and above the display left speaker SLD, and the right speaker SR is disposed on the front right side and above the display right speaker SRD. Similarly, the center speaker SC, the surround left speaker SLS, and the surround right speaker SRS are also attached to the ceiling.

  2 is a block diagram showing the configurations of the DVD player 10 and the AV amplifier 20, and FIG. 3 is a block diagram showing the configurations of the AV amplifier 20 (same as FIG. 2) and the display device 30, respectively. The DVD player 10, the AV amplifier 20, and the display device 30 comply with the HDMI standard, for example, 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 encoded multi-channel audio data recorded on the disc from the disc and supplies it to the HDMI transmission unit 13. The reproduction unit 11 includes an optical pickup, a servo circuit, an MPEG decoder, an audio decoder, etc. (not shown).

  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 is connected via a TMDS line for transmitting / receiving HDMI data (usually there are a plurality of lines but only one line is shown for simplicity) and a hot plug for determining the presence / absence of connection. , Connected to the HDMI receiver 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.

[Configuration of AV amplifier]
Next, the configuration of the AV amplifier 20 will be described with reference to FIG. 2 or FIG. 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 a connector. Parts 27 and 28.

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

  The audio processing unit 26 decodes the multi-channel audio data supplied from the HDMI receiving unit 21, executes each process such as acoustic processing, D / A conversion processing, volume adjustment processing, amplification processing, and the like, and is connected to the outside. An audio signal of each channel is supplied to the speaker 60 (corresponding to each speaker in FIGS. 1A and 1B). Further, the audio processing unit 26 supplies audio data of a certain channel to the HDMI transmission unit 22 as necessary.

Here, the multi-channel audio data supplied to the audio processing unit 26 will be described. Dolby True HD, Dolby Digital
In HD (High Definition) related audio formats such as Plus and DTS-HD, as shown in FIG. 12, for example, left audio data L, right audio data R, central audio data C, low frequency audio data SW, surround There are left audio data LS, surround right audio data RS, surround back left audio data LSB, surround back right audio data RSB, upper left audio data Lh, upper right audio data Rh, etc., and multi-channels supplied to the audio processing unit 26 The audio data includes audio data of 8 channels selected from these (generally, the low frequency audio data SW is expressed as 0.1ch and is referred to as 7.1 channel). Yes.

  The upper left audio data Lh is audio data reproduced from a position above the left audio data L. The upper right audio data Rh is audio data reproduced from a position above the right audio data R. As described above, speakers corresponding to these audio data are not provided in FIGS. 1A and 1B.

For example, the following patterns (1) to (2) are conceivable for the multichannel audio data supplied to the audio processing unit 26.
(1) Left audio data L, right audio data R, central audio data C, low frequency audio data SW, surround left audio data LS, surround right audio data RS, surround back left audio data LSB, surround back right audio data RSB If included.
(2) Left audio data L, right audio data R, central audio data C, low frequency audio data SW, surround left audio data LS, surround right audio data RS, upper left audio data Lh, upper right audio data Rh are included. If so.

  FIG. 4 is a block diagram illustrating a configuration of the audio processing unit 26. The audio processing unit 26 includes a DSP 41, a DAC (digital-analog converter) 42, a volume adjustment unit 43, an amplification processing unit 44, a conversion unit 45, and a switching unit 46. In this example, the switching unit 46 is provided in the DSP 41, but may be provided in a subsequent stage of the DSP 41 (between the DSP 41 and the DAC 42 and between the DSP 41 and the conversion unit 45).

  The DSP 41 decodes the multichannel audio data supplied from the HDMI receiving unit 21 and generates decoded audio data of each channel. Among the audio data decoded by the DSP 41, the central audio data C, the low frequency audio data SW, the surround left audio data LS, the surround right audio data RS, the surround back left audio data LSB, and the surround back right audio data RSB are directly used as the DAC 42. To be supplied. On the other hand, the left audio data L, the right audio data R, the upper left audio data Lh, and the upper right audio data Rh are first supplied to the switching unit 46.

  The switching unit 46 supplies the left audio data L, the right audio data R, the upper left audio data Lh, and the upper right audio data Rh to the DAC 42 (that is, reproduces from the speaker connected to the AV amplifier 20), or , Whether to supply to the conversion unit 45 (that is, playback from the speaker of the display device) is selected. Specifically, the switching unit 46 switches the switch SW1 for switching between the left audio data L and the upper left audio data Lh to be supplied to the DAC 42, and the right audio data R and the upper right audio data Rh to the DAC 42. A switch SW2 that switches whether to supply the left audio data L to the conversion unit 45, and a switch SW4 that switches whether to supply the right audio data R to the conversion unit 45. .

  When the multi-channel audio data does not include the upper left audio data Lh and the upper right audio data Rh, the DSP 41 may generate the upper left audio data Lh and the upper right audio data Rh from the audio data of other channels. it can. For example, the DSP 41 generates the upper left audio data Lh from the left audio data L and the surround left audio data LS, and generates the upper right audio data Rh from the right audio data R and the surround right audio data RS. The generated upper left audio data Lh and upper right audio data Rh are supplied to the switches SW1 and SW2, respectively.

  The DAC 42 converts the audio data of each channel supplied from the DSP 41 and the switching unit 46 from digital to analog, and supplies the analog audio signal of each channel to the volume adjustment unit 43.

  The volume adjustment unit 43 adjusts the volume value of the analog audio signal of each channel and supplies it to the amplification processing unit 44. The volume adjustment unit 43 is provided with a volume adjustment circuit such as a variable resistor for each channel. The amplification processing unit 44 amplifies the audio signal of each channel supplied from the volume adjustment unit 43 and outputs the amplified signal to the speaker of each channel via the speaker output terminal of each channel. The amplification processing unit 44 is provided with an amplification circuit for each channel.

  The conversion unit 45 is supplied with the left audio data L and the right audio data R from the switching unit 46. Further, the conversion unit 45 is supplied with the bit clock BCLK, the master clock MCLK, and the LR clock LRCLK from the DSP 41. The conversion unit 45 converts the left audio data L and the right audio data R into SPDIF (2-channel PCM) audio data based on each clock, and supplies the converted audio data to the HDMI transmission unit 22.

  Returning to FIG. 2 or FIG. 3, the HDMI transmitting unit 22 receives the video data supplied from the HDMI receiving unit 21 and the left audio data L and the right audio data R supplied from the converting unit 45 of the audio processing unit 26. Convert to HDMI data. The HDMI transmission unit 22 transmits the converted HDMI data to the HDMI reception unit 31 of the display device 30.

  The HDMI transmission unit 22 is connected to the HDMI reception unit 31 of the display device 30 via a TMDS line and a hot plug. The HDMI transmission unit 22 is connected to the PROM 34 and the HDMI reception unit 31 of the display device 30 via a DDC line.

  The system control unit 23 controls the HDMI reception unit 21, the HDMI transmission unit 22, the operation display unit 24, the PROM 25, the audio processing unit 26, and the like based on an AV amplifier operation program stored in a built-in or connected memory. For example, a microcomputer or a CPU is used. 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 acquires the channel information of the multichannel audio data from the audio processing unit 26, and determines whether or not the left upper audio data Lh and the upper right audio data Rh are included in the multichannel audio data. Alternatively, the system control unit 23 does not include the upper left audio data Lh and the upper right audio data Rh in the multi-channel audio data, but the upper left audio data Lh and the upper right audio data from other channel audio data by user operation. It may be determined whether or not the audio data Rh is set to be generated and output.

  When the upper left audio data Lh and the upper right audio data Rh are included (or when the upper left audio data Lh and the upper right audio data Rh are generated from the audio data of other channels), the system control unit 23 Controls the switching unit 46 to output the left audio data L and the right audio data R to the conversion unit 45 and to output the upper left audio data Lh and the upper right audio data Rh to the DAC 42. That is, the switch SW1 selects the upper left audio data Lh, the switch SW2 selects the upper right audio data Rh, the switch SW3 selects the left audio data L (turns on), and the switch SW4 selects the right audio data R. Select (turn on). 1A and 1B, the upper left audio data Lh is reproduced from the left speaker SL, the upper right audio data Rh is reproduced from the right speaker SR, and the left audio data L is reproduced from the display left speaker SLD. Right audio data R is reproduced from the right speaker SRD.

  On the other hand, when the upper left audio data Lh and the upper right audio data Rh are not included, the system control unit 23 controls the switching unit 46 to output the left audio data L and the right audio data R to the DAC 42. . That is, the switch SW1 selects the left audio data L, the switch SW2 selects the right audio data R, the switch SW3 does not select the left audio data L (turns off), and the switch SW4 selects the right audio data R. Do not let (turn off). 1A and 1B, the left audio data L is reproduced from the left speaker SL, the right audio data R is reproduced from the right speaker SR, and no audio is reproduced from the display left speaker SLD and the display right speaker SRD.

  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 is connected to the system control unit 33 of the display device 30 via the CEC line, and transmits and receives commands and data to and from the system control unit 33.

  When the left upper audio data Lh and the upper right audio data Rh are included in the multichannel audio data, the system control unit 23 is currently set in the AV amplifier 20 in the display device 30 via the CEC line. Send a volume setting command including the volume value. When the left audio data L and the right audio data R are reproduced using the speaker of the display device 30, the volume of the audio reproduced from the speaker connected to the AV amplifier 20 and the audio reproduced from the speaker of the display 30. This is to make the volume coincide with each other.

[Configuration of Display Device 30]
Next, the display device 30 will be described with reference to FIG. The display device 30 includes an HDMI receiving unit 31, a display unit 32, a system control unit 33, a memory (EDID PROM, hereinafter referred to as PROM) 34, an operation unit 35, an audio processing unit 36, and a speaker 37 ( 1A) (corresponding to the display left speaker SLD and the display right speaker SRD) and the connector unit 38.

  The HDMI receiving unit 31 receives the HDMI data transmitted from the HDMI transmitting unit 22 of the AV amplifier 20, generates original video data from the HDMI data, and supplies the original video data to the display unit 32. In addition, the HDMI receiving unit 31 generates original audio data from the HDMI data and supplies it to the audio processing unit 36. The audio data is SPDIF (PCM) data including the left audio data L and the right audio data R as described above.

  The audio processing unit 36 performs each process such as a D / A conversion process, a volume adjustment process, and an amplification process on the audio data supplied from the HDMI receiving unit 31, and supplies it to the speaker 37. FIG. 5 is a block diagram illustrating a configuration of the audio processing unit 36. The audio processing unit 36 includes a DAC (digital-analog converter) 51, a volume adjustment unit 52, and an amplification processing unit 53.

  The DAC 51 performs digital-analog conversion on the audio data supplied from the HDMI receiving unit 31 and supplies an analog audio signal to the volume adjusting unit 52. The volume adjustment unit 52 adjusts the volume value of the analog audio signal from the DAC 51 and supplies it to the amplification processing unit 53. The volume value of the volume adjustment unit 52 is adjusted by the system control unit 33 to the volume value included in the volume setting command from the system control unit 14 of the AV amplifier 20. The amplification processing unit 53 amplifies the audio signal from the volume adjustment unit 52 and outputs it to the speaker. That is, the left audio data L is reproduced from the display left speaker SLD, and the right audio data R is reproduced from the display right speaker SRD.

  The display unit 32 is supplied with video data from the HDMI receiving unit 31 and displays video based on the video data, and is, for example, an LCD or a CRT.

  The system control unit 33 controls the HDMI receiving unit 31, the display unit 32, the PROM 34, the audio processing unit 36, and the like based on an operation program of the display device stored in a built-in or connected memory. A microcomputer or a CPU. The system control unit 33 executes various processes based on an operation input from the operation unit 35 or a control signal and data from each unit.

  Upon receiving the volume setting command from the system control unit 23 of the AV amplifier 20, the system control unit 33 controls the volume value of the volume adjustment unit 52 based on the volume value included in the volume setting command. When the control of the volume value is completed, the system control unit 33 transmits a volume setting completion notification to the system control unit 23 of the AV amplifier 20 via the CEC line. This is to prompt the AV amplifier 20 to start transmitting HDMI data including the left audio data L and the right audio data R.

[Operation of audio playback system]
The operation of the present invention will be described below with reference to the flowcharts of FIGS. As shown in FIG. 6, the system control unit 23 of the AV amplifier 20 monitors whether or not HDMI data is input from the DVD player 10, that is, whether or not the HDMI receiving unit 21 receives HDMI data. (S11). When the HDMI data is input (YES in S11), the system control unit 23 controls the volume adjustment unit 43 and the amplification processing unit 44 to be in a mute state (S12), and noise due to switching of each switch of the switching unit 46 is caused by the speaker. Output from.

  The HDMI receiving unit 21 generates original video data and multi-channel audio data from the HDMI data, supplies the video data to the HDMI transmission unit 22, and supplies the multi-channel audio data to the audio processing unit 26. The audio processing unit 26 decodes a part of the multi-channel audio data, reads the channel information included in the information area, and supplies the channel information to the system control unit 23 (S13).

  Subsequently, the system control unit 23 determines whether or not the display device 30 is connected to the AV amplifier 20 (S14). For example, when the display device 30 is connected via an HDMI cable, since the hot plug output from the display device 30 is at a high level, the presence or absence of the connection can be determined by determining the hot plug level. . Here, since the display device 30 is connected (YES in S14), the process proceeds to S15.

  The system control unit 23 determines whether the upper left audio data Lh and the upper right audio data Rh are included in the multichannel audio data (S15). In the case of the multi-channel audio data (2) above, the audio data of these channels is included (YES in S15). Accordingly, the system control unit 23 sends a volume setting command to the system control unit 33 of the display device 30 via the CEC line in order to prepare for reproducing the left audio data L and the right audio data R with the speaker of the display device 30. Transmit (S16). The volume setting command includes a volume value (not a relative value but an absolute value such as a dB unit) that is currently set in the volume adjustment unit 43 of the AV amplifier 20.

  As shown in FIG. 7, the system control unit 33 of the display device 30 monitors whether a volume setting command is received from the system control unit 23 of the AV amplifier 20 via the CEC line (S31). When receiving the volume setting command (YES in S31), the system control unit 33 reads the volume value included in the volume setting command and sets the volume value of the volume adjustment unit 52 to the volume value (S32). Subsequently, the system control unit 33 transmits a volume setting completion notification to the system control unit 23 of the AV amplifier 20 via the CEC line (S33). Thereafter, the display device 30 stands by until HDMI data is received from the AV amplifier 20.

  Returning to FIG. 6, the system control unit 23 of the AV amplifier 20 monitors whether or not a volume setting completion notification has been received from the system control unit 33 of the display device 30 via the CEC line (S17). When the volume setting completion notification is received (YES in S17), the system control unit 23 controls the audio processing unit 26 and the HDMI transmission unit 22 to decode the multi-channel audio data and transmit the HDMI data to the display device 30. Execute (S18).

  Details of S18 will be described with reference to FIG. The audio processing unit 26 (DSP 41) decodes the audio data of each channel (S22). In the switching unit 46, the system control unit 23 causes the switch SW1 to select the upper left audio data Lh, causes the switch SW2 to select the upper right audio data Rh, causes the switch SW3 to select the left audio data Lh, and causes the switch SW4 to select the upper right audio data Lh. The side audio data R is selected.

  As a result, the switching unit 46 supplies the left audio data L and the right audio data R decoded by the DSP 41 to the conversion unit 45. The conversion unit 45 converts the left audio data L and the right audio data R into SPDIF (PCM) data, and supplies the converted data to the HDMI transmission unit 22. The HDMI transmission unit 22 generates HDMI data from the video data, the left audio data L, and the right audio data R, and transmits the HDMI data to the HDMI reception unit 31 of the display device 30 (S23).

  As shown in FIG. 7, when receiving the HDMI data, the HDMI receiving unit 31 of the display device 30 generates the original video data, the left audio data L, and the right audio data R, and supplies the video data to the display unit 32. Then, the left audio data L and the right audio data R are supplied to the audio processing unit 36 (S34). The system control unit 33 controls the volume adjustment unit 52 and the amplification processing unit 53 to cancel the mute state (S35). In the audio processing unit 36, the DAC 51 performs digital-analog conversion of the audio data, the volume adjustment unit 52 adjusts the volume value of the analog audio signal, and the amplification processing unit 53 amplifies the analog audio signal and outputs it to the speaker. As a result, the left audio data L is reproduced from the display left speaker SLD, and the right audio data Rc is reproduced from the display right speaker SRD (S36).

  As shown in FIG. 8, the switching unit 46 supplies the upper left audio data Lh and the upper right audio data Rh decoded by the DSP 41 to the DAC 42 (S24). The DAC 42 converts the audio data from digital to analog, the volume adjustment unit 52 adjusts the volume value of the analog audio signal, and the amplification processing unit 53 amplifies the analog audio signal and outputs it to the speaker. As a result, the upper left audio data Lh is reproduced from the left speaker SL, and the upper right audio data Rh is reproduced from the right speaker SR. Similarly, the central audio data C is reproduced from the central speaker C, the surround left audio data LS is reproduced from the surround left speaker SLS, and the surround right audio data RS is reproduced from the surround right speaker SRS.

  As described above, in the case of the audio data (2), the left audio data L is reproduced from the display left speaker SLD, the right audio data R is reproduced from the display right speaker SRD, and the upper left audio is output from the left speaker SL. Data Lh is reproduced, and upper right audio data Rh is reproduced from the right speaker SR. Therefore, the upper left audio data Lh and the upper right audio data Rh can be reproduced from appropriate positions using the existing speaker arrangement.

  In S15, the upper left audio data Lh and the upper right audio data Rh are not included in the multichannel audio data, but the upper left audio data Lh and the upper right audio data Rh are obtained from the audio data of other channels by a user operation. Therefore, the DSP 41 determines whether to generate the upper left audio data Lh and the upper right audio data Rh from the audio data of other channels and output them to the switching unit 46. May be.

  Next, in the case of the audio data (1), that is, when the upper left audio data Lh and the upper right audio data Rh are not included, NO is determined in S15 of FIG. In this case, the system control unit 23 performs control so as to reproduce the multi-channel audio data by a normal method (S21). Specifically, the system control unit 23 causes the switching unit 46 to cause the switch SW1 to select the left audio data L and cause the switch SW2 to select the right audio data R. Further, the system control unit 23 does not cause the switch SW3 to select the left audio data L and does not cause the switch SW4 to select the right audio data R.

  The switching unit 46 supplies the left audio data L and the right audio data R decoded by the DSP 41 to the DAC 42. The DAC 42 converts the audio data from digital to analog, the volume adjustment unit 52 adjusts the volume of the analog audio signal, and the amplification processing unit 53 amplifies the analog audio signal and outputs it to the speaker. As a result, the left audio data L is reproduced from the left speaker SL, and the right audio data R is reproduced from the right speaker SR. Similarly, the central audio data C is reproduced from the central speaker C, the surround left audio data LS is reproduced from the surround left speaker SLS, the surround right audio data RS is reproduced from the surround right speaker SRS, and the surround rear left audio data. The LSB is reproduced from the surround rear left speaker SLSB, and the surround rear right audio data RSB is reproduced from the surround rear right speaker SRSB.

  Further, the left audio data L and the right audio data R are not supplied from the switching unit 46 to the conversion unit 45, and no audio data is supplied from the conversion unit 45 to the HDMI transmission unit 22. Accordingly, the HDMI transmission unit 22 generates HDMI data from only the video data and transmits the HDMI data to the HDMI reception unit 31 of the display device 30.

  When receiving the HDMI data, the HDMI receiving unit 31 of the display device 30 generates the original video data and supplies the video data to the display unit 32. On the other hand, since no audio signal is supplied to the speaker of the display device 30, no audio is reproduced from the display left speaker SLD and the display right speaker SRD.

  Next, when it is determined in S14 that the display device 30 is not connected to the AV amplifier 20 (NO in S14), the process proceeds to S21 and the same processing as in the case of the audio data in (1) is performed. Executed. When the display device 30 is not connected, audio data cannot be reproduced using the display left speaker SLD and the display right speaker SRD. Here, when the upper left audio data Lh and the upper right audio data Rh are included in the multichannel audio data, the switching unit 46 causes the switch SW1 to select the upper left audio data Lh and causes the switch SW2 to select the upper right audio data Rh. When the data Rh is selected, the left audio data L is selected by the switch SW3, and the right audio data R is selected by the switch SW4, the left audio data L and the right audio data R that are main audio data are not reproduced. Occurs. However, in this example, when it is determined that the display device 30 is not connected, the left audio data L and the left audio data L and the switch SW2 are selected by causing the switch SW1 to select the left audio data L and the switch SW2. The right audio data R can be reliably reproduced.

  Next, still another preferred embodiment of the present invention will be described. In this example, as shown in FIGS. 9A, 9B, and 10, the AV amplifier 20c further includes a pair of DACs 42c for the left audio data L and the right audio data R, a volume adjustment unit 43c, an amplification processing unit 44c, and a speaker. An output terminal is provided, and the second left speaker SL2 and the second right speaker SR2 can be connected. The second left speaker SL2 is disposed on the left side of the display device 30, for example, and the second right speaker SR2 is disposed on the right side of the display device 30. In other words, the left speaker SL is disposed on the front left side and above the second left speaker SL2, and the right speaker SR is disposed on the front right side and above the second right speaker SR2. .

  As shown in FIG. 10, the switching unit 46c in the DSP 41c reproduces the left audio data L (right audio data R) and the upper left audio data Lh (upper right audio data Rh) from the left speaker SL (right speaker SR). Or playback from the second left speaker SL2 (second right speaker SR2). Specifically, the switching unit 46c switches the switch SW1c for switching which of the left audio data L and the upper left audio data Lh is supplied to the left speaker SL, and which of the right audio data R and the upper right audio data Rh. A switch SW2c for switching whether to supply to the right speaker SR, a switch SW3c for switching whether to supply the left audio data L to the second left speaker SL2, and whether to supply the right audio data R to the second right speaker SR2. And a switch SW4c for switching between.

FIG. 11 is a flowchart showing the operation of the AV amplifier 20c in this example.
[For audio data (2)]
In the case of the audio data (2), that is, when the upper left audio data Lh and the upper right audio data Rh are included, YES is determined in S42. In the switching unit 46c, the system control unit 23 causes the switch SW1c to select the upper left audio data Lh, causes the switch SW2c to select the upper right audio data Rh, causes the switch SW3c to select the left audio data Lh, and causes the switch SW4c to select the right The audio data R is selected (S43, S44).

  As a result, left audio data L is reproduced from the second left speaker SL, right audio data R is reproduced from the second right speaker SR, upper left audio data Lh is reproduced from the left speaker SL, and upper right side is reproduced from the right speaker SR. Audio data Rh is reproduced. Therefore, the left audio data L, the right audio data R, the upper left audio data Lh, and the upper right audio data Rh can be reproduced from appropriate positions.

[In the case of (1) audio data]
In the case of the audio data (1), that is, when the upper left audio data Lh and the upper right audio data Rh are not included, NO is determined in S42. In the switching unit 46c, the system control unit 23 causes the switch SW1c to select the left audio data L, causes the switch SW2c to select the right audio data R, does not cause the switch SW3c to select the left audio data L, and causes the switch SW4c to select the right audio data L. Data R is not selected (S45).

  As a result, the left audio data L is reproduced from the left speaker SL, the right audio data R is reproduced from the right speaker SR, the left audio data L is not reproduced from the second left speaker SL2, and the right audio is outputted from the second right speaker SR2. Data R is not reproduced. Therefore, the left audio data L and the right audio data R can be reproduced from appropriate positions.

  Also in this example, although the upper left audio data Lh and the upper right audio data Rh are not included in the multichannel audio data in S42, the upper left audio data Lh, Since the upper right audio data Rh is set to be generated and output, the DSP 41c generates the upper left audio data Lh and the upper right audio data Rh from the audio data of other channels and outputs them to the switching unit 46c. It may be determined whether or not.

  As mentioned above, although preferable embodiment of this invention was described, this invention is not limited to these embodiment. Audio data (and speakers) of channels other than the left audio data L, right audio data R, upper left audio data Lh, and upper right audio data Rh are not essential to the present invention, and include audio data of different channels. May be. Further, the AV amplifier 20 may include the function of the DVD player 10, and in this case, the HDMI receiving unit 21 is not necessary. The present invention can also be applied to a television receiver having the functions of the AV amplifier 20 and the display device 30, and the multi-channel audio data in this case may be TV broadcast audio data. Further, the AV amplifier 20 may receive HDMI data from a receiver instead of the DVD player 10. Further, the audio data transmitted to the display device may be transmitted via an optical digital cable or the like instead of being transmitted via the HDMI cable. In this case, the volume setting command may be transmitted via another communication cable. Further, 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.

It is a figure which shows arrangement | positioning of AV amplifier 20, the display apparatus 30, and a speaker. It is a figure which shows arrangement | positioning of the speaker in a room. 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. 1 is a block diagram showing a configuration of an AV amplifier 20 and a display device according to a preferred embodiment of the present invention. 4 is a block diagram illustrating an audio processing unit 26. FIG. 3 is a block diagram illustrating an audio processing unit 36. FIG. 5 is a flowchart for explaining the operation of the AV amplifier 20. 4 is a flowchart for explaining the operation of the display device 30. It is a flowchart which shows the detail of S18. It is a figure which shows arrangement | positioning of AV amplifier 20 and a speaker by other embodiment. FIG. 6 is a diagram showing the arrangement of speakers in a room according to another embodiment. It is a block diagram explaining the audio | voice processing part 26c by other embodiment. It is a flowchart explaining operation | movement of AV amplifier 20c by other embodiment. It is a figure which shows the reproduction | regeneration position of each audio | voice data of multichannel audio | voice data.

DESCRIPTION OF SYMBOLS 10 DVD player 20 AV amplifier 21 HDMI receiving part 22 HDMI transmission part 23 System control part 26 Audio | voice processing part 30 Display apparatus 31 HDMI receiving part 33 System control part 41 DSP
42 DAC
43 Volume adjustment unit 44 Amplification processing unit 45 Conversion unit 46 Switching unit 51 DAC
52 Volume adjustment unit 53 Amplification processing unit

Claims (7)

A display device including a display left speaker and a display right speaker, a left speaker disposed on the front left side and above the display left speaker, and a right speaker disposed on the front right side and above the display right speaker Is a voice processing device that can be connected,
Channel determination means for determining whether left upper audio data and upper right audio data are included in multi-channel audio data including at least left audio data and right audio data;
When it is determined that the upper left audio data and the upper right audio data are included in the multichannel audio data, the left audio data and the right audio data are transmitted to the display device, and the left audio data is reproduced from the display left speaker. And playback control means for playing right audio data from the display right speaker, playing upper left audio data from the left speaker, and playing upper right audio data from the right speaker,
When it is determined that the upper left audio data and the upper right audio data are not included in the multi-channel audio data, the reproduction control unit reproduces the left audio data from the left speaker and the right audio data from the right speaker. An audio processing device for reproduction. Further comprising display connection determining means for determining whether or not the display device is connected to the audio processing device;
If it is determined that the display device is not connected to the audio processing device, the left audio is output from the left speaker regardless of whether the upper left audio data and the upper right audio data are included in the multichannel audio data. The audio processing apparatus according to claim 1, wherein data is reproduced and right audio data is reproduced from the right speaker. When the display device receives a volume setting command, the volume value of the sound reproduced from the display left speaker and the display right speaker is set to a volume value included in the volume setting command,
Volume that transmits a volume setting command including a volume value set in the audio processing device to the display device when it is determined that the upper left audio data and the upper right audio data are included in the multichannel audio data The speech processing apparatus according to claim 1, further comprising a control unit. A display device including a display left speaker and a display right speaker, a left speaker disposed on the front left side and above the display left speaker, and a right speaker disposed on the front right side and above the display right speaker Is a voice processing device that can be connected,
Whether it is set to generate upper left audio data and upper right audio data from audio data of channels other than upper left audio data and upper right audio data in multi-channel audio data including at least left audio data and right audio data Setting determination means for determining whether or not
Generating means for generating upper left audio data and upper right audio data from audio data of channels other than upper left audio data and upper right audio data;
When it is determined that the upper left audio data and the upper right audio data are set to be generated from the audio data of the channels other than the upper left audio data and the upper right audio data, the left audio data and the right audio data are displayed on the display. To the device, the left audio data is reproduced from the display left speaker, the right audio data is reproduced from the display right speaker, the upper left audio data is reproduced from the left speaker, and the upper right audio data is reproduced from the right speaker. A reproduction control means for reproducing
When it is determined that the upper left audio data and the upper right audio data are not set to be generated from the audio data of the channels other than the upper left audio data and the upper right audio data, the reproduction control unit is connected to the left speaker. An audio processing apparatus for reproducing left audio data and reproducing right audio data from the right speaker. A left speaker disposed on the front left side and above the second left speaker, a right speaker disposed on the front right side and above the second right speaker, a second left speaker disposed on the front left side, and An audio processing device to which a second right speaker arranged on the front right side is connectable,
Channel determination means for determining whether left upper audio data and upper right audio data are included in multi-channel audio data including at least left audio data and right audio data;
When it is determined that the upper left audio data and the upper right audio data are included in the multichannel audio data, the upper left audio data is reproduced from the left speaker, the upper right audio data is reproduced from the right speaker, and When the left audio data is reproduced from the second left speaker, the right audio data is reproduced from the second right speaker, and it is determined that the upper left audio data and the upper right audio data are not included in the multichannel audio data And a playback control means for playing back left audio data from the left speaker and playing back right audio data from the right speaker. A left speaker disposed on the front left side and above the second left speaker, a right speaker disposed on the front right side and above the second right speaker, a second left speaker disposed on the front left side, and An audio processing device to which a second right speaker arranged on the front right side is connectable,
Whether it is set to generate upper left audio data and upper right audio data from audio data of channels other than upper left audio data and upper right audio data in multi-channel audio data including at least left audio data and right audio data Setting determination means for determining whether or not
Generating means for generating upper left audio data and upper right audio data from audio data of channels other than upper left audio data and upper right audio data;
When it is determined that the upper left audio data and the upper right audio data are set to be generated from the audio data of channels other than the upper left audio data and the upper right audio data, the upper left audio data is reproduced from the left speaker. The right upper audio data is reproduced from the right speaker, the left audio data is reproduced from the second left speaker, the right audio data is reproduced from the second right speaker, and the upper left audio data and the upper right audio data are reproduced. When it is determined that the upper left audio data and the upper right audio data are not generated from the audio data of the channels other than the left audio data, the left audio data is reproduced from the left speaker, and the right audio data is output from the right speaker. An audio processing apparatus comprising reproduction control means for reproducing.   A speech processing program for causing a computer to execute each means in the speech processing device according to claim 1.

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