WO2005120132A1 - 音響信号処理装置 - Google Patents
音響信号処理装置 Download PDFInfo
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- WO2005120132A1 WO2005120132A1 PCT/JP2005/009956 JP2005009956W WO2005120132A1 WO 2005120132 A1 WO2005120132 A1 WO 2005120132A1 JP 2005009956 W JP2005009956 W JP 2005009956W WO 2005120132 A1 WO2005120132 A1 WO 2005120132A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R5/00—Stereophonic arrangements
- H04R5/04—Circuit arrangements, e.g. for selective connection of amplifier inputs/outputs to loudspeakers, for loudspeaker detection, or for adaptation of settings to personal preferences or hearing impairments
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04S—STEREOPHONIC SYSTEMS
- H04S3/00—Systems employing more than two channels, e.g. quadraphonic
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04S—STEREOPHONIC SYSTEMS
- H04S3/00—Systems employing more than two channels, e.g. quadraphonic
- H04S3/006—Systems employing more than two channels, e.g. quadraphonic in which a plurality of audio signals are transformed in a combination of audio signals and modulated signals, e.g. CD-4 systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2227/00—Details of public address [PA] systems covered by H04R27/00 but not provided for in any of its subgroups
- H04R2227/005—Audio distribution systems for home, i.e. multi-room use
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2420/00—Details of connection covered by H04R, not provided for in its groups
- H04R2420/03—Connection circuits to selectively connect loudspeakers or headphones to amplifiers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R27/00—Public address systems
Definitions
- the present invention relates to an audio signal processing device for decoding multi-channel audio signals and an audio signal reproduction system.
- Multi-channel audio formats include Dolby Digital ("Dolby” is a trademark of Dolby Laboratories) and DTS ("DTS” is a registered trademark of Digital Theater Systems, Inc.) used in DVDs (Digital Versatile Discs) and the like.
- 5.1 Channel surround sound such as MPEG-AAC (Moving Picture Experts Groove-Advenced Audio Codec) used in digital television broadcasting and the like. As shown in Figure 1, this 5.1-channel surround system consists of two channels, front left and right (L, R), one channel at the front center (C), and two channels, surround left and right (SL, SR). Channels and subwoofers (SW) are defined as speaker arrangements.
- DTS-ES Digital Theater Systems, Inc.
- Dolby Pro Logic II 7.1-channel surround
- audio formats with more than 6 channels including subwoofers and channels Extended processing is standardized.
- the one-channel surround system as shown in Fig. 2, has one surround center (SC) channel in addition to the speaker arrangement of the 5.1-channel surround system.
- the 1-channel surround system as shown in Fig. 3, has two channels of back surround left and right (BL, BR) in addition to the speaker arrangement of the 5.1-channel surround system.
- an audio signal having more than 6 channels is decoded and then down-mixed to output an audio signal having 6 or less channels. Therefore, it is possible to support audio formats with more than six channels including subwoofers without increasing the number of output terminals.
- a 5.1-channel surround audio signal processing device 401 decodes an audio input signal into a 6-channel audio signal.
- the down-mixing for down-mixing the 6-channel audio signals to DL and DR audio signals for headphone output Some units include a down-mix audio signal output terminal 405 that outputs a down-mixed DL and DR audio signal.
- Patent Document 1 JP 2001-352599 A
- the number of output channels is reduced from eight to seven or six, and reproduction is performed from speed.
- the problem is that the original sense of reality of 1-channel surround and 7.1-channel surround is lost.
- the present invention has been made in view of the above circumstances, and has been made in view of the above circumstances. It is possible to simultaneously output audio signals including a subwoofer having more than six channels without individually increasing the number of audio signal output terminals. It is an object to provide a signal processing device and an audio signal reproduction system.
- N N:
- An audio signal processing device for individually outputting audio signals of (N ⁇ 3 natural number) channels, which decodes an audio input signal of a predetermined format and outputs the N-channel audio signals and the 2-channel downmix audio signals.
- Signal output means for outputting a (N-2) channel audio signal among the N channel audio signals output from the signal processing means; and the signal processing means.
- the N-channel audio signals output from the second channel excluding the (N ⁇ 2) -channel audio signal output by the first output means, and the two-channel audio signal output from the signal processing means.
- Either of the two-channel downmixed audio signals is used based on external settings. Characterized in that it comprises a second output means for outputting the other to select.
- the signal processing means decodes the audio input signal of the predetermined format to output the N-channel audio signal.
- the first decoding means may determine the number of channels included in the audio input signal of the predetermined format, based on the setting of the external power. When decoding to an audio signal of (K: a natural number of K ⁇ N) channel, a silent signal of (NK) channel may be output.
- the signal processing means decodes an audio input signal of the predetermined format to form an M (M: N> M ⁇ 2 natural number) channel.
- a second decoding means for outputting the audio signal of the second channel, and performing downmix processing on the audio signal of the M channel output from the second decoding means, thereby outputting the downmix audio signal of the two channels.
- a channel for generating the N-channel audio signal by performing channel expansion processing on the M-channel audio signal output from the second down-mixing means and the M-channel audio signal output from the second decoding means. And extension means.
- the channel expansion unit may determine the number of channels included in the audio input signal of the predetermined format, based on an external setting. : When the channel is extended to an audio signal of (N> L ⁇ M natural number) channel, a silent signal of (NL) channel is output.
- an audio signal reproducing system employs a signal processing device to output audio signals of N (N: a natural number of K ⁇ 3) channels.
- An audio signal reproducing system for reproducing a down-mixed audio signal with headphones while reproducing the audio signal from a speaker, wherein the signal processing device decodes an audio input signal of a predetermined format and outputs the N-channel audio signal.
- Signal processing means for outputting a two-channel downmix audio signal; and (N-2) channel audio signals among the N-channel audio signals output from the signal processing means.
- First output means for outputting, and the first output means of the N-channel audio signals output from the signal processing means.
- One of the two-channel audio signal and the two-channel downmix audio signal output from the signal processing means is exclusively selected based on the setting of the external force, excluding the channel audio signal.
- the audio signal reproduction system further outputs the audio signal to which the output of the second output means is output as one of the speaker and the headphone.
- An output switching unit capable of switching a connection mode, wherein the output switching unit sets a control signal for outputting an audio signal according to the connection mode to the second output unit as the external setting. It is characterized by outputting to the second output means.
- the output switching means may be constituted by digital-to-analog conversion means having a mute function.
- the output switching means may be configured by a power amplifier having a mute function.
- the audio signal reproduction system further includes a headphone detection means for detecting whether or not the headphones are connected, and Means for outputting, when the headphone detecting means detects that the headphones are connected, the second output means outputs the two-channel downmix audio signal to which the signal processing means is also output. And if the headphone detecting means detects that the headphones are connected to the headphone, the second output means outputs the N-channel signal output from the signal processing means.
- the format of the (N-2) channel output from the first output means is A control signal for outputting a two-channel audio signal, excluding an audio signal, to the second output means as an external setting.
- the present invention provides an acoustic signal processing apparatus including, as a step, an acoustic signal processing apparatus or an acoustic signal processing apparatus that can be realized as an acoustic signal reproduction system. It can be realized as a processing method, as a program for causing a computer to execute those steps, or as an integrated circuit integrated. Needless to say, such a program can be distributed via a recording medium such as a CD-ROM or a transmission medium such as the Internet.
- a recording medium such as a CD-ROM or a transmission medium such as the Internet.
- the number of audio signal output terminals exceeds six channels including a subwoofer without increasing the number of audio signal output terminals. It is possible to provide an audio signal processing device and an audio signal reproduction system capable of simultaneously outputting audio signals individually.
- FIG. 1 is a diagram showing a 5.1-channel multi-channel surround system.
- FIG. 2 is a diagram showing a 6.1-channel multi-channel surround system.
- FIG. 3 is a diagram showing a 7.1-channel multi-channel surround system.
- FIG. 4 is a diagram showing a configuration of a conventional 5.1-channel surround audio signal processing device.
- FIG. 5 is a diagram showing a configuration of an audio signal processing device according to Embodiments 1 and 2 of the present invention.
- FIG. 6 is a diagram showing a configuration of an audio signal processing device according to Embodiment 3 of the present invention.
- FIG. 7 is a diagram showing a configuration of an acoustic signal processing device according to Embodiments 4 and 5 of the present invention.
- FIG. 8 is a diagram showing an overall configuration of an audio signal reproduction system according to Embodiment 6 of the present invention.
- FIG. 9 is a diagram showing an overall configuration of an audio signal reproduction system according to Embodiment 7 of the present invention.
- FIG. 10 is a diagram showing an overall configuration of an audio signal reproduction system according to Embodiment 8 of the present invention.
- FIG. 11 is a diagram showing an overall configuration of an audio signal reproduction system according to Embodiment 9 of the present invention.
- FIG. 5 is a diagram showing a configuration of the acoustic signal processing device according to Embodiment 1 of the present invention.
- the audio signal processing device 501 includes a decoding unit 502, a downmix unit 503, a first output unit 504, and a second output unit 505. Note that the decoding unit 502 and the downmix unit 503 constitute a signal processing unit.
- the decoding unit 502 decodes an audio input signal (for example, Dolby Pro Logic ⁇ decoding) and outputs eight-channel audio signals of L, R, C, SW, SL, SR, BL, and BR.
- an audio input signal for example, Dolby Pro Logic ⁇ decoding
- the downmix unit 503 downmixes the L, R, C, SW, SL, SR, ⁇ L, and BR audio signals output from the decoding unit 502, and outputs DL and DR two-channel audio signals. Is output.
- the first output unit 504 has six output terminals and six signal lines connected to these output terminals, and outputs L, R, C, SW, It outputs L, R, C, SW, SL, and SR audio signals, excluding BL and BR, among the audio signals of SL, SR, BL, and BR individually.
- the second output unit 505 has two output terminals, two signal lines connected to these output terminals, and two switches, and outputs the BL, BR output from the decoding unit 502. Audio signals of DL and DR output from the downmix unit 503 are input. Based on external settings (instructions), audio signals of BL and BR and audio signals of DL and DR are input. Is selected and output. That is, the audio signal of BL and BR and the audio signal of DL and DR are exclusively output.
- the two output terminals exclusively switch between functioning as a downmix audio signal output terminal and functioning as the two-channel audio signal output terminal of the ⁇ channel.
- the sub-woofer can be used effectively without increasing the number of audio signal output terminals because the two output terminals can be used effectively. It is possible to provide an audio signal processing device capable of simultaneously and individually outputting audio signals having more than six channels.
- L, R, C, SW, SL, SR Decode to SC 7 channel audio signal, and split SC audio signal into BL and BR audio signals and output.
- the audio signals of any two channels output from the power decoding unit 502 inputting the BL and BR audio signals to the second output unit 505 are input. Even if it does not work. In this case, the remaining audio signal input to the second output unit 505 may be output via the first output unit 504.
- the present invention may be applied to the case of decoding using other methods described in the case of Dolby Pro Logic ⁇ decoding.
- the decoding unit 502 decodes an audio signal of ⁇ ( ⁇ : natural number of ⁇ ⁇ ) channels based on the number of channels included in the audio input signal or an external setting, ( ⁇ — ⁇ ) You may comprise so that the silence signal of a channel may be output.
- an SC channel audio signal may be output from the BL output of the decoding unit 502, and a silence signal may be output from the BR output.
- FIG. 6 is a diagram showing a configuration of an acoustic signal processing device according to Embodiment 3 of the present invention.
- the audio signal processing device 601 includes a decoding unit 602, a downmix unit 603, a first output unit 604, and a second output unit 605.
- the decoding unit 602, the downmix unit 603, the first output unit 604, and the second output unit 605 are different from each other in that the number of channels of the processed audio signal and the type of the audio signal are different. It has the same functions as the decoding unit 502, downmix unit 503, first output unit 504, and second output unit 505 of the above-described acoustic signal processing device 501.
- the decoding unit 602 decodes an audio input signal (eg, Dolby Digital EX decoding) and outputs audio signals of 7 channels of L, R, C, SW, SL, SR, and SC.
- an audio input signal eg, Dolby Digital EX decoding
- the downmix unit 603 downmixes the L, R, C, SW, SL, SR, and SC audio signals to which the decoding unit 602 has also output, and outputs DL and DR two-channel audio signals. .
- the first output unit 604 outputs the L, R, and C signals of the seven-channel audio signals L, R, C, SW, SL, SR, and SC output from the decoding unit 602, excluding SL and SR. , SW, SC 5 channel audio signals are output individually.
- the second output unit 605 receives the SL and SR audio signals output from the decode unit 602 and the DL and DR audio signals output from the downmix unit 603, and performs external setting (instruction). ), And outputs either one of the SL and SR audio signals and the DL and DR audio signals.
- the two output terminals exclusively switch between functioning as downmix audio signal output terminals and functioning as two-channel audio signal output terminals of N channels. Audio signal that can simultaneously output individual audio signals with more than 6 channels, including subwoofers, without increasing the number of audio signal output terminals because the two output terminals can be used effectively.
- a processing device can be provided.
- the audio signals of SL and SR are input to the second output unit 605. Inputting audio signals of any two channels output from the decoding unit 602 does not work. In this case, the remaining audio signal input to the second output unit 605 may be output via the first output unit 604.
- the case of Dolby Digital EX decoding described above is also applicable to the case of decoding of another method.
- a silence signal of the (N ⁇ K) channel may be output.
- FIG. 7 is a diagram showing a configuration of an audio signal processing device according to Embodiment 4 of the present invention.
- the audio signal processing device 701 includes a decoding unit 702, a downmix unit 703, a first output unit 704, a second output unit 705, and a channel expansion unit. Part 7 06 is provided.
- the decoding unit 702, the downmix unit 703, the first output unit 704, and the second output unit 705 are the same as those described above except that the number of channels of the audio signal to be processed and the type of the audio signal are different. It has the same functions as the decoding units 502 and 602, the downmixing units 503 and 603, the first output units 504 and 604, and the second output units 505 and 605 of the sound signal processing devices 501 and 601. Further, in this embodiment, the signal processing means is constituted by the decoding section 702, the downmix section 703, and the channel expansion section 706.
- the decoding unit 702 decodes an audio input signal (for example, Dolby digital decoding) and outputs six-channel audio signals of L, R, C, SW, SL, and SR.
- an audio input signal for example, Dolby digital decoding
- the downmix unit 703 downmixes the L, R, C, SW, SL, and SR audio signals output from the decode unit 702, and outputs DL and DR two-channel audio signals.
- the channel extension unit 706 outputs the L, R, C, SW, SL, SR output from the decoding unit 702. Performs channel expansion processing (for example, Pro Logic II X decoding) on the 6-channel audio signal of the 8 channels, and performs 8-channel audio of L, R, C, SW, SL, SR, BL, BR by this channel expansion processing. Output a signal.
- channel expansion processing for example, Pro Logic II X decoding
- the first output unit 704 outputs L, R, C, SW, and L, excluding BL and BR, among L, R, C, SW, SL, SR, BL, and BR output from the channel extension unit 706. Outputs SL and SR audio signals individually.
- the second output unit 705 receives the BL and BR audio signals output from the channel expansion unit 706 and the DL and DR audio signals output from the downmix unit 703, respectively, and sets an external force. Based on the instruction, one of the BL and BR audio signals and the DL and DR audio signals is selected and output.
- the two output terminals exclusively switch between functioning as downmix audio signal output terminals and functioning as two-channel audio signal output terminals of N channels. Audio signal that can simultaneously output individual audio signals with more than 6 channels, including subwoofers, without increasing the number of audio signal output terminals because the two output terminals can be used effectively.
- a processing device can be provided.
- channel expansion section 706 expands (for example, Dolby Digital EX decoding) the audio signals into seven channels of L, R, C, SW, SL, SR, and SC, and converts SC to BL. And may be divided into BR and output.
- audio signals of any two channels output from the force channel expansion unit 706 in which BL and BR are input to the second output unit may be input. Absent.
- the channel expansion unit 706 is configured to transmit L (L: N> based on the number of channels included in the audio input signal or an external setting.
- L L: N> based on the number of channels included in the audio input signal or an external setting.
- the channel expansion unit 706 may be configured to output a silence signal of (N-L) channel! / ,.
- channel expansion section 706 outputs the input signal as it is for L, R, C, SW, SL, SR, and outputs a silence signal to BL, BR. Accordingly, even when the channel expansion processing is not performed and the second output unit 705 is set to output BL and BR, it is possible to prevent noise from being output from BL and BR.
- the extension processing for example, Dolby Digital EX decoding
- the SC channel audio signal may be output from the BL output of the channel expansion unit 706, and a silence signal may be output from the BR output.
- the audio signal reproduction system 800 includes an audio signal processing device 801, DACs (Digital-Analog Converters) 811 to 818, an output switching unit 807, and power amplifiers 821 to 830. , Speakers 831 to 838, and headphone 841.
- DACs Digital-Analog Converters
- the L, R, C, SW, SL, and SR audio signals output from the first output unit 804 of the audio signal processing device 801 are individually connected to DACs 811 to 816 and converted to analog signals. After that, it is amplified by power amplifiers 821 to 826 and reproduced by speakers 831 to 836.
- one of the audio signals BL / BR and DL / DR output from the second output unit 805 of the audio signal processing device 801 is converted into an analog signal by the DAC 817 or 818.
- the output switching unit 807 selects a speaker output or a headphone output force.
- the output switching unit 807 When the output switching unit 807 is set to output the speaker, the output switching unit 807 A control signal is output to the second output unit 805 so as to select the BL and BR audio signals, and the output switching unit 807 outputs the BL and BR audio signals to the power amplifiers 827 and 828.
- the BL and BR audio signals are amplified by the power amplifiers 827 and 828, and the speeds 837 and 838 are also reproduced.
- a control signal is output from the output switching unit 807 to the second output unit 805 so as to select a DL or DR audio signal.
- the output switching unit 807 outputs DL and DR audio signals to the power amplifiers 829 and 830.
- the DL and DR audio signals are amplified by the power amplifiers 829 and 830 and reproduced from the headphones 841.
- the speaker outputs may be muted by DACs 811-816 or power amplifiers 821-826.
- the audio signal reproduction system 900 includes an audio signal processing device 901, DACs 911 to 920, noise amplifiers 921 to 930, speakers 931 to 938, and headphones 941. Consists of The output switching unit 907 is configured by the DACs 917 to 920.
- the L, R, C, SW, SL, and SR audio signals output from the first output unit 904 of the audio signal processing device 901 are individually connected to the DAC 911-916 for each channel, and converted to analog signals. After that, it is amplified by power amplifiers 921-926 and reproduced from speakers 931-936.
- the audio signal of BL, BR or DL, DR output from the second output unit 905 is input to four DACs 917 to 920.
- the output switching unit 907 When outputting the BL and BR audio signals from the speakers 937 and 938, the output switching unit 907 outputs a control signal to the second output unit 905 so as to select the BL and BR audio signals. Then, mute the headphone output with DAC919,920.
- the BL and BR audio signals amplified by the power amplifiers 927 and 928 are reproduced from the speeds 937 and 938, and no sound is output from the headphones 941.
- the output switching unit 907 When outputting the DL and DR audio signals from the headphones 941, the output switching unit 907 outputs a control signal to the second output unit 905 so as to select the DL and DR audio signals. Mute speaker output at 918.
- the audio signals of DL and DR amplified by the power amplifiers 929 and 930 are reproduced from the headphone 941, and silence is output from the speakers 937 and 938.
- the speaker output may be muted by DAC 911 to 916 or power amplifiers 921 to 926.
- an audio signal reproduction system 1000 includes an audio signal processing device 1001, DACs 1011 to 1018, power amplifiers 1021 to 1030, speakers 1031 to 1038, and headphones 1041.
- the output switching unit 1007 is configured by the first amplifiers 1027 to 1030.
- the audio signals (L, R, C, SW, SL, and SR) output from the first output unit 1004 are individually connected to DACs 1011 to 1016, converted into analog signals, and then converted to power amplifiers. It is amplified by 1021 to 1026 and reproduced from speakers 1031 to 1036.
- the audio signal (BL, BR or DL, DR) output from the second output unit 1005 is input to the two DACs 1017 and 1018 and is converted into an analog signal. Is input to
- the output switching unit 1007 When the BL and BR audio signals are output from the speakers 1037 and 1038, the output switching unit 1007 outputs a control signal to the second output unit 1005 so as to select the BL and BR audio signals. Mute the headphone output with power amplifiers 1029 and 1030. As a result, the BL and BR audio signals amplified by the power amplifiers 1027 and 1028 are reproduced from the speeds 1037 and 1038, and no sound is output from the headphones 1041.
- the output switching unit 1007 When outputting the DL and DR audio signals from the headphones 1041, the output switching unit 1007 outputs a control signal to the second output unit 1005 so as to select the DL and DR audio signals. Mutes speaker output with power amplifiers 1027 and 1028. As a result, the DL and DR audio signals amplified by the power amplifiers 1029 and 1030 are reproduced from the headphones 1041, and silence is output from the speakers 1037 and 1038. In this case, the speaker output may be muted by DACs 1011 to 1016 or power amplifiers 1021 to 1026.
- an audio signal reproduction system 1100 includes an audio signal processing device 1101, DACs 1111 to: L 118, single amplifiers 1121 to 1130, speakers 1311 to 1138, and a headphone 1141.
- a headphone detecting unit 1109 and an output switching unit 1107 are further provided.
- a headphone detector 1109 is provided in the headphone jack, and when headphones are not detected by the headphone detector 1109, the output switch 1107 is set to output from a speaker. At this time, a control signal is output from the output switching unit 1107 to the second output unit 1105 so as to select the BL and BR audio signals.
- the output switching unit 1107 is set to output the headphone. At this time, a control signal is output from the output switching unit 1107 to the second output unit 1105 so as to select the DL and DR audio signals.
- the two output terminals exclusively switch between functioning as downmix audio signal output terminals and functioning as two-channel audio signal output terminals of N channels. Audio signal that can simultaneously output individual audio signals with more than 6 channels, including subwoofers, without increasing the number of audio signal output terminals because the two output terminals can be used effectively.
- a processing device can be provided.
- the present invention is effective as an audio signal processing device that decodes a multi-channel audio signal or an audio signal reproduction system using the same, and is a player dedicated to audio, a player that adds video to audio, or an AV player. for application to the amplifier, and the like [this; to 0
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Abstract
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US11/569,391 US20070242832A1 (en) | 2004-06-04 | 2005-05-31 | Acoustical Signal Processing Apparatus |
JP2006514099A JPWO2005120132A1 (ja) | 2004-06-04 | 2005-05-31 | 音響信号処理装置 |
EP05745851A EP1758428A4 (en) | 2004-06-04 | 2005-05-31 | ACOUSTIC SIGNAL PROCESSING APPARATUS |
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JP2008072206A (ja) * | 2006-09-12 | 2008-03-27 | Onkyo Corp | マルチチャンネル音声増幅装置 |
JP2008312034A (ja) * | 2007-06-15 | 2008-12-25 | Panasonic Corp | 音声信号再生装置、および音声信号再生システム |
JP4840666B2 (ja) * | 2007-06-18 | 2011-12-21 | ソニー株式会社 | 音声再生装置および音声再生方法 |
US8644526B2 (en) * | 2008-06-27 | 2014-02-04 | Panasonic Corporation | Audio signal decoding device and balance adjustment method for audio signal decoding device |
CN102273233B (zh) | 2008-12-18 | 2015-04-15 | 杜比实验室特许公司 | 音频通道空间转换 |
US20110060431A1 (en) * | 2009-09-09 | 2011-03-10 | Himax Media Solutions, Inc. | Audio output devices |
JP5754367B2 (ja) * | 2011-12-20 | 2015-07-29 | ヤマハ株式会社 | 音響処理装置および音響システム |
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- 2005-05-31 EP EP05745851A patent/EP1758428A4/en not_active Withdrawn
- 2005-05-31 JP JP2006514099A patent/JPWO2005120132A1/ja active Pending
- 2005-05-31 CN CNA2005800178431A patent/CN1961611A/zh active Pending
- 2005-05-31 US US11/569,391 patent/US20070242832A1/en not_active Abandoned
- 2005-05-31 WO PCT/JP2005/009956 patent/WO2005120132A1/ja not_active Application Discontinuation
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See also references of EP1758428A4 * |
Also Published As
Publication number | Publication date |
---|---|
EP1758428A4 (en) | 2010-06-23 |
EP1758428A1 (en) | 2007-02-28 |
CN1961611A (zh) | 2007-05-09 |
US20070242832A1 (en) | 2007-10-18 |
JPWO2005120132A1 (ja) | 2008-04-03 |
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