WO2005064991A1 - オーディオ装置 - Google Patents
オーディオ装置 Download PDFInfo
- Publication number
- WO2005064991A1 WO2005064991A1 PCT/JP2004/019505 JP2004019505W WO2005064991A1 WO 2005064991 A1 WO2005064991 A1 WO 2005064991A1 JP 2004019505 W JP2004019505 W JP 2004019505W WO 2005064991 A1 WO2005064991 A1 WO 2005064991A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- audio signal
- audio
- channel audio
- terminal
- signal
- Prior art date
Links
Classifications
-
- 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
- H04S3/02—Systems employing more than two channels, e.g. quadraphonic of the matrix type, i.e. in which input signals are combined algebraically, e.g. after having been phase shifted with respect to each other
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04S—STEREOPHONIC SYSTEMS
- H04S5/00—Pseudo-stereo systems, e.g. in which additional channel signals are derived from monophonic signals by means of phase shifting, time delay or reverberation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04S—STEREOPHONIC SYSTEMS
- H04S5/00—Pseudo-stereo systems, e.g. in which additional channel signals are derived from monophonic signals by means of phase shifting, time delay or reverberation
- H04S5/02—Pseudo-stereo systems, e.g. in which additional channel signals are derived from monophonic signals by means of phase shifting, time delay or reverberation of the pseudo four-channel type, e.g. in which rear channel signals are derived from two-channel stereo signals
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04S—STEREOPHONIC SYSTEMS
- H04S7/00—Indicating arrangements; Control arrangements, e.g. balance control
Definitions
- the present invention relates to an audio device corresponding to a multi-channel audio source.
- a one-channel audio device like a conventional stereo audio device, outputs a left channel (L) audio signal for the front left speaker and a right channel for the front right speaker as stereo audio signals. (R) process audio signals.
- a center channel (C) audio signal for front center speed a surround left channel (SL) audio signal for rear left speaker, and a surround right channel for rear right speaker.
- SR surround left channel
- SW subwoofer channel
- Each of these channels is assigned an audio source according to the performance or the content being played.
- DVD-type optical discs record the multi-channel audio source, and the reproduction is generally performed by the multi-channel audio device.
- the block diagram in FIG. 4 shows an output portion of a conventional audio device corresponding to a 5.1-channel audio source.
- the audio device 101 includes an audio signal adjustment circuit 103, noise amplifiers 104L, 104R, 104C, 104SL, 104SR, and 104SW, and speakers 105L, 105R, 105C, 105SL, 105SR, and 105SW.
- the audio signal adjustment circuit 103 converts the L audio signal, R audio signal, C audio signal, SL audio signal, SR audio signal, and SW audio signal into input terminals L, R, C, and SL, respectively.
- LinA of audio signal adjustment circuit 103 from, SR, SW Input to end, RinA end, CinA end, SLinA end, SRinA end, SWinA end. Then, the waveform of each audio signal is adjusted, that is, the volume, treble, bus, etc. are adjusted, and the LoutA end, RoutA end, CoutA end, SLoutA end, SRout A end, SWoutA end of the audio signal adjustment circuit 103 are adjusted. Output each of them.
- Patent Document 1 Japanese Patent Application Laid-Open No. 2002-345097
- the audio signals at the CoutA end, SLoutA end, SRoutA end, and SW outA end of the audio signal adjustment circuit 103 are not output from the speakers! Therefore, the C audio signal, the SL audio signal, the SR audio signal, and the SW audio
- the voice assigned to the signal is V, so that the sound is missing and cannot be heard by the viewer.
- the present invention has been made in view of the above circumstances, and an object of the present invention is to connect a multi-channel audio source to a speaker for each audio source and reduce the number of audio sources to less than that of each audio source. It is an object of the present invention to provide an audio device capable of reproducing a multi-channel audio source without sound loss even when a number of speakers are connected. Means for solving the problem
- an audio apparatus includes a left channel audio signal, a right channel audio signal, a center channel audio signal, a surround left channel audio signal, and a surround right channel.
- a channel audio signal and a subwoofer channel audio signal are input, and a center channel audio signal, a surround left channel audio signal and a subwoofer channel audio signal are converted into a left channel audio signal at a predetermined ratio, a center channel audio signal and a surround right channel audio signal.
- An audio mixing circuit for inputting an output signal of the audio mixing circuit and adjusting the signal waveform, and a plurality of power amplifiers for amplifying the audio signal having the adjusted signal waveform
- the audio mixing circuit of the audio device desirably performs mixing and output, a left channel audio signal, a right channel audio signal, a center channel audio signal, a surround left channel audio signal, and a surround right channel.
- a state in which the audio signal and the subwoofer channel audio signal are output without being mixed can be selected.
- the audio device includes the audio mixing circuit. Therefore, even if speakers are connected to each audio source, only a smaller number of, for example, two speakers than each audio source are connected. Even so, multi-channel audio sources can be played without sound loss, and you can enjoy the effect of being in a theater or concert hall.
- FIG. 1 is a block diagram of a full-set audio device according to an embodiment of the present invention.
- FIG. 2 is a block diagram of an audio device of the stereo set of the above.
- FIG. 3 is a circuit diagram of the audio mixing circuit of the above.
- FIG. 4 is a block diagram of a full-set audio device of the background art.
- FIG. 5 is a block diagram of an audio device of the stereo set of the above.
- SW Subwoofer channel
- FIGS. 1 and 2 are block diagrams of an audio apparatus 1 according to an embodiment of the present invention, which supports a multi-channel audio source.
- the audio device 1 is a 5.1-channel audio device, and differs from the conventional audio device 101 in that an audio mixing circuit 2 is provided in a stage preceding the audio signal adjustment circuit 3.
- the audio signal adjustment circuit 3 is a circuit substantially equivalent to the audio signal adjustment circuit 103.
- the audio device 1 is a full set (home theater set) shown in Fig. 1, the audio mixing circuit 2, the audio signal adjustment circuit 3, and the power amplifier unit 4, ⁇ Amplifier 4L, 4R, 4C, 4SL, 4SR, 4SW and speaker ⁇ 5 , Speakers 5L, 5R, 5C, 5SL, 5SR, and 5SW.
- an audio mixing circuit 2 an audio signal adjusting circuit 3
- a power amplifier unit 4 including power amplifiers 4L and 4R
- a speaker unit 5 including speakers 5L and 5R, Is provided.
- the audio mixing circuit 2 transmits a stereo audio signal composed of a left channel (L) audio signal and a right channel (R) audio signal to input terminals L and R respectively at a LinM terminal and a RinM terminal.
- the surround audio signal composed of the center channel (C) audio signal, surround left channel (SL) audio signal, surround right channel (SR) audio signal, and subwoofer channel (SW) audio signal Input from input terminals C, SL, SR and SW to CinM end, SLinM end, SRinM end and SWinM end. Then, the processing of the stereo audio signal and the surround audio signal is controlled by the mixing control circuit 20 described later in detail.
- the mixing control circuit 20 has a SinM terminal as an input terminal, and has an inverted output terminal and a non-inverted output terminal. Then, the state where the SinM terminal is grounded and the state where it is connected to the power supply Vcc can be switched by an external switch (not shown).
- the audio mixing circuit 2 is set so that the SinM terminal, that is, the input terminal of the mixing control circuit 20 is grounded.
- the audio signals input to the LinM, RinM, CinM, SLinM, SRinM, and SWinM terminals are output directly to the LoutM, RoutM, CoutM, SLoutM, SRoutM, and SWoutM terminals. I do.
- the audio signal adjustment circuit 3 includes a LinA end, a Rin A end, a CinA end, a SLinA end, an SRinA end, Adjusts the waveform of the audio signal input to the SWinA end, that is, adjusts the volume, treble, bass, etc., and applies the audio signal whose waveform has been adjusted to the LoutA end, RoutA end, CoutA end, SLoutA end, SRoutA end, SWoutA Output each.
- the power amplifiers 4L, 4R, 4C, 4SL, 4SR, and 4SW of the power amplifier unit 4 are LoutA end, RoutA end, CoutA end, SLoutA end, and SRoutA end of the audio signal adjustment circuit 3. Then, the audio signals whose waveforms have been adjusted are input and amplified from the SWoutA terminal, and the speakers 5L, 5R, 5C, 5SL, 5SR, and 5SW of the speaker unit 5 are driven by the amplified audio signals.
- the SinM terminal that is, the input terminal of the mixing control circuit 20 is connected to the power supply Vcc.
- audio signals input to the CinM, SLin M, and SWinM terminals are mixed with audio signals input to the LinM terminal, and audio signals input to the CinM, SRinM, and SWinM terminals are input to the Rin M terminal.
- no audio signal is output from the CoutM end, SLoutM end, SRoutM end, and SW outM end (the output is in a non-signal state).
- the audio signal adjustment circuit 3 adjusts the waveform of the audio signal input from the LoutM end and the RoutM end of the audio mixing circuit 2 to the LinA end and the RinA end, respectively. Are output from the LoutA and RoutA terminals, respectively.
- the CinA end, SLinA end, SRinA end, and SWinA end of the audio signal adjustment circuit 3 are the CoutM end, SLoutM end, SRoutM end, and SWoutM end of the audio mixing circuit 2. Each is connected to the end.
- the power amplifiers 4L and 4R of the power amplifier unit 4 also input and amplify the LoutA end and the RoutA end of the audio signal adjustment circuit 3 by inputting the waveform-adjusted audio signals, respectively.
- the speakers 5L and 5R of the speaker section 5 are driven. None is connected to the audio signal adjustment circuit 3 at its CoutA end, SLoutA end, SRoutA end, and SWout A end.
- One end of the resistor 21 is connected to the LinM end, one end of the resistor 23 is connected to the SLinM end, and one end of the switch 47 is connected.
- the control terminal of the switch 47 is connected to the inverting output terminal of the mixing control circuit 20, similarly to the respective control terminals of the switches 48 to 50 described later.
- the other end of the switch 47 is connected to the SLoutM end.
- the other end of the resistor 23 is connected to one end of the switch 41.
- the control terminal of the switch 41 is connected to the non-inverting output terminal of the mixing control circuit 20, similarly to the respective control terminals of the switches 42 to 46 described later.
- the other end of 1 and the other end of the resistor 21 are connected to each other, and also connected to one end of the resistor 22 and the inverting input terminal of the operational amplifier 11.
- the non-inverting input terminal of the operational amplifier 11 is connected to the reference voltage Vref, similarly to the non-inverting input terminals of the op-amps 12 to 14 described later.
- the output terminal of the operational amplifier 11 and the other end of the resistor 22 are connected to each other and to one end of the resistor 24.
- one end of the resistor 26 and one end of the resistor 33 are connected to the CinM end, and also connected to one end of the switch 49.
- the other end of the switch 49 is connected to the CoutM end.
- the other end of the resistor 26 is connected to one end of the switch 42, and the other end of the resistor 33 is connected to one end of the switch 45.
- One end of the resistor 27 and one end of the resistor 34 are connected to the SWinM end, and also connected to one end of the switch 50.
- the other end of the switch 50 is connected to the SWoutM end.
- the other end of the resistor 27 is connected to one end of the switch 43, and the other end of the resistor 34 is connected to one end of the switch 46.
- the other end of the resistor 24 and the other end of each of the switches 42 and 43 are connected to each other, and also connected to one end of the resistor 25 and the inverting input terminal of the operational amplifier 12.
- the output terminal of the operational amplifier 12 and the other end of the resistor 25 are connected to each other and to the LoutM end.
- the resistors 21 and 22 and the resistors 24 and 25 described above are set to the same resistance value.
- One end of a resistor 28 is connected to the RinM end, one end of the resistor 30 is connected to the SRinM end, and one end of the switch 48 is connected. The other end of the switch 48 is connected to the SRoutM end. The other end of resistor 30 is connected to one end of switch 44.
- the other end of the switch 44 and the other end of the resistor 28 are connected to each other and to one end of the resistor 29 and the inverting input terminal of the operational amplifier 13.
- the output terminal of the operational amplifier 13 and the other end of the resistor 29 are connected to each other and to one end of the resistor 31.
- the other end of the resistor 31 and the other ends of the switches 45 and 46 are connected to each other, and also connected to one end of the resistor 32 and the inverting input terminal of the operational amplifier 14.
- the output terminal of the operational amplifier 14 and the other end of the resistor 32 are connected to each other and to the RoutM end.
- the resistors 28 and 29 and the resistors 31 and 32 described above are set to the same resistance value.
- the audio signal output from the RoutM terminal is substantially equivalent to the audio signal input to the RinM terminal.
- the audio signals input to the CinM terminal, SLinM terminal, SRinM terminal and SWinM terminal are output to the CoutM terminal, SLoutM terminal, SRoutM terminal and SWoutM terminal through switches 47 to 50.
- the audio signal input to the RinM terminal is mixed at a predetermined ratio with the audio signals input to the SRinM terminal, the CinM terminal, and the SWinM terminal, and output from the RoutM terminal. Further, the switches 47 to 50 do not conduct, so that the outputs of the CoutM terminal, the SLoutM terminal, the SRoutM terminal, and the SWoutM terminal are in a non-signal state.
- the number of speakers can be reduced by installing fewer speakers than each audio source, for example, two speakers at the front left and right only. The user can enjoy the sound without the multi-channel audio source.
- the audio mixing circuit 2 is not limited to that of the embodiment, but can be realized by other circuits. Further, the switch for switching the SinM end of the mixing control circuit 20 to the ground or the power supply Vcc connection is provided by the number of power amplifiers (that is, (The number of one force) may be detected and automatically switched. Also, the mixing control circuit
- the 20 may have a force register for discriminating between a full set and a stereo set based on the voltage at the SinM end, and write discrimination data into it.
- the DSP is expensive, while the audio mixing circuit 2 can be composed of a relatively simple analog circuit, so that the cost can be reduced. Can be. Furthermore, by forming the audio mixing circuit 2 and the audio signal adjusting circuit 3 on the same semiconductor substrate and performing one-chip bonding, the cost can be reduced and the size of the audio device can be reduced.
- the present invention is not limited to the above-described embodiment, and various design changes can be made within the scope of the claims.
- the above description has been given for a 5.1-channel audio device 1, but there are more audio sources! (For example, a surround back sound is added).
- the present invention can be applied to a channel audio device.
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/596,765 US20070147622A1 (en) | 2003-12-25 | 2004-12-27 | Audio apparatus |
JP2005516684A JPWO2005064991A1 (ja) | 2003-12-25 | 2004-12-27 | オーディオ装置 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003-431607 | 2003-12-25 | ||
JP2003431607 | 2003-12-25 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005064991A1 true WO2005064991A1 (ja) | 2005-07-14 |
Family
ID=34736441
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2004/019505 WO2005064991A1 (ja) | 2003-12-25 | 2004-12-27 | オーディオ装置 |
Country Status (6)
Country | Link |
---|---|
US (1) | US20070147622A1 (ja) |
JP (1) | JPWO2005064991A1 (ja) |
KR (1) | KR20060131784A (ja) |
CN (1) | CN1898991A (ja) |
TW (1) | TW200522761A (ja) |
WO (1) | WO2005064991A1 (ja) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102196338A (zh) * | 2010-03-19 | 2011-09-21 | 宏碁股份有限公司 | 扬声系统及其控制方法 |
CN102802112B (zh) * | 2011-05-24 | 2014-08-13 | 鸿富锦精密工业(深圳)有限公司 | 具有音频文件格式转换功能的电子装置 |
CN102883245A (zh) * | 2011-10-21 | 2013-01-16 | 郝立 | 3d幻音 |
CN109729486B (zh) * | 2017-10-30 | 2020-08-21 | 无锡华润矽科微电子有限公司 | 提高音频功放输出功率的封装结构、封装方法及接线结构 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2000059896A (ja) * | 1998-08-06 | 2000-02-25 | Sanyo Electric Co Ltd | サラウンド調整装置 |
JP2001503943A (ja) * | 1996-11-12 | 2001-03-21 | テレフオンアクチーボラゲツト エル エム エリクソン(パブル) | 出力バッファ回路 |
JP2002044799A (ja) * | 2000-07-31 | 2002-02-08 | Yamaha Corp | オーディオ用アンプ |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3911222A (en) * | 1970-12-09 | 1975-10-07 | Kenwood Corp | Method and a device for producing a 4-channel stereophonic sound field |
JPH0746880B2 (ja) * | 1986-02-20 | 1995-05-17 | 三菱電機株式会社 | 音場創造装置 |
KR100206333B1 (ko) * | 1996-10-08 | 1999-07-01 | 윤종용 | 두개의 스피커를 이용한 멀티채널 오디오 재생장치및 방법 |
US5912976A (en) * | 1996-11-07 | 1999-06-15 | Srs Labs, Inc. | Multi-channel audio enhancement system for use in recording and playback and methods for providing same |
US6757659B1 (en) * | 1998-11-16 | 2004-06-29 | Victor Company Of Japan, Ltd. | Audio signal processing apparatus |
JP2003061198A (ja) * | 2001-08-10 | 2003-02-28 | Pioneer Electronic Corp | オーディオ再生装置 |
-
2004
- 2004-12-24 TW TW093140418A patent/TW200522761A/zh unknown
- 2004-12-27 KR KR1020067011635A patent/KR20060131784A/ko not_active Application Discontinuation
- 2004-12-27 US US10/596,765 patent/US20070147622A1/en not_active Abandoned
- 2004-12-27 JP JP2005516684A patent/JPWO2005064991A1/ja active Pending
- 2004-12-27 CN CNA2004800387625A patent/CN1898991A/zh active Pending
- 2004-12-27 WO PCT/JP2004/019505 patent/WO2005064991A1/ja active Application Filing
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001503943A (ja) * | 1996-11-12 | 2001-03-21 | テレフオンアクチーボラゲツト エル エム エリクソン(パブル) | 出力バッファ回路 |
JP2000059896A (ja) * | 1998-08-06 | 2000-02-25 | Sanyo Electric Co Ltd | サラウンド調整装置 |
JP2002044799A (ja) * | 2000-07-31 | 2002-02-08 | Yamaha Corp | オーディオ用アンプ |
Also Published As
Publication number | Publication date |
---|---|
KR20060131784A (ko) | 2006-12-20 |
CN1898991A (zh) | 2007-01-17 |
US20070147622A1 (en) | 2007-06-28 |
TW200522761A (en) | 2005-07-01 |
JPWO2005064991A1 (ja) | 2007-07-26 |
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