JPH0286398A - Audio signal reproducing device - Google Patents

Audio signal reproducing device

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Publication number
JPH0286398A
JPH0286398A JP63237634A JP23763488A JPH0286398A JP H0286398 A JPH0286398 A JP H0286398A JP 63237634 A JP63237634 A JP 63237634A JP 23763488 A JP23763488 A JP 23763488A JP H0286398 A JPH0286398 A JP H0286398A
Authority
JP
Japan
Prior art keywords
signal
audio
signals
sound image
sound
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP63237634A
Other languages
Japanese (ja)
Inventor
Mikio Oda
幹夫 小田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP63237634A priority Critical patent/JPH0286398A/en
Publication of JPH0286398A publication Critical patent/JPH0286398A/en
Pending legal-status Critical Current

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Abstract

PURPOSE:To make a picture and a sound image coincident with each other and to reproduce a sound field with a sense of spread by providing adders mixing and adding audio L/R main signals in parallel and mixing and adding opposite channels of the audio signals L/R inputted without provision of a rear reproducing device. CONSTITUTION:The inputted audio L/R main signals subject to a multiple of alpha1 for the L signal and alpha2 for the R signal (0<=alpha1, alpha2<=1) by a attenuator 1, the result is inputted to the adders 2, and the resulting attenuated signals are mixed and added to the audio L/R main signals of the opposite channel. Thus, the sound image is located at an optional position between front speakers 4. A reverberation signal is generated by a difference component detection circuit 5 and a time delay device 6. Then the signal is mixed to one channel of the adder 2 and mixed to the other channel through a phase inverter 7. Thus, the sound image is located near a monitor TV 8 by the L/R main signals and the sound image is located by a front speaker 4 by the reverberation signal, then the sound field expansion effect of the reverberation signal is obtained.

Description

【発明の詳細な説明】 産業上の利用分野 本発明は、オーディオ・ビジュアルソフト再生装置のオ
ーディオ再生装置に関するものである。
DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an audio playback device for an audio/visual software playback device.

従来の技術 近年のオーディオ・ビジュアル機器の発達は、めざまし
いものであり、モニター画面の大型化、VTRのHi−
Fi化に伴って、オーディオ信号再生も従来のTV内蔵
のオーディオ再生アンプ。
Conventional technology The development of audio-visual equipment in recent years has been remarkable, with monitor screens becoming larger and VTRs becoming more
With the shift to Fi, audio signal playback is now done using the conventional TV built-in audio playback amplifier.

スピーカを使用せず、高性能、高出力のオーディオφコ
ンポーネントと組み合わせて、映画等のオーディオ書ビ
ジュアルソフトを家庭で楽しむ機会が増加してき、てい
る。
Opportunities to enjoy audio and visual software such as movies at home are increasing, without using speakers, in combination with high-performance, high-output audio components.

また、オーディオ・ビジュアルソフトも従来のモノラル
記録からステレ第2ch記録、更にはサラウンド成分を
混入したドルビーサラウンド記録へと高品質化が図られ
、増々ソフトウェア、ハードウェア画面から発展が期待
できる。
Furthermore, the quality of audio-visual software has improved from conventional monaural recording to stereo 2ch recording and even Dolby surround recording that incorporates surround components, and we can expect further development from the software and hardware screen.

オーディオ・ビジュアルソフトを家庭内で再生する場合
、第3図に示すごとく中心にモニターTV8.  その
両側にフロントスピーカ4を配置し、操作者の左右後方
にリアースピーカ9を配置する。
When playing audio/visual software at home, the monitor TV8. Front speakers 4 are arranged on both sides, and rear speakers 9 are arranged on the left and right rear sides of the operator.

第4図は、第3図のオーディオ信号を再生する為のブロ
ック図である。第4図において、3はフロント再主用パ
ワーアンプ、10はリアー再生用パワーアンプ、5は差
成分検出回路、8は時間遅延器、4はフロントスピーカ
、9はリアースピーカである。以上の様に構成されたオ
ーディオ信号再生装置について、その動作を説明する。
FIG. 4 is a block diagram for reproducing the audio signal of FIG. 3. In FIG. 4, 3 is a front main power amplifier, 10 is a rear reproduction power amplifier, 5 is a differential component detection circuit, 8 is a time delay device, 4 is a front speaker, and 9 is a rear speaker. The operation of the audio signal reproducing apparatus configured as described above will be explained.

レーザーディスク、VTR等のオーディオ・ビジュアル
再生装置により再生されるビジュアル信号は、第3図に
示すモニターTV8により視覚化され、一方、オーディ
オ信号は、L信号、R信号を第4図に示すごとく、フロ
ント再生用パワーアンプ3を経由して、フロントスピー
カ4により各々再生されるのと同時にL−R成分を作成
する差成分検出回路5へ入力され、L−R信号を時間遅
延をかけ、残響感を出す時間遅延器6を経由して、残響
信号としてリアー再生用パワーアンプ10により、増幅
され、リアースピーカ9により再生される。
Visual signals reproduced by audio/visual reproduction devices such as laser discs and VTRs are visualized by a monitor TV 8 shown in FIG. 3, while audio signals include L and R signals as shown in FIG. 4. Via the front reproduction power amplifier 3, the signals are input to the difference component detection circuit 5 which creates the L-R components at the same time as they are reproduced by the front speakers 4, and the L-R signals are time-delayed to create a reverberation effect. The signal passes through a time delay device 6 that outputs a reverberation signal, is amplified as a reverberation signal by a power amplifier 10 for rear reproduction, and is reproduced by a rear speaker 9.

発明が解決しようとする課題 しかしながら前記した構成、設置では画像と音像の不一
致が発生し、またリアー再生用機器の増設が必要となる
。例えば、音源となる画像がモニターTVS上の左隅に
ある時、オーディオ信号は音源として左チャンネルのみ
に記録されており、第3図の一点鎖線で示すフロントス
ピーカ4をモニターTV8の横につけて設置すれば良い
が、若干の不一致は残る。
Problems to be Solved by the Invention However, with the above-described configuration and installation, a mismatch between the image and the sound image occurs, and additional equipment for rear reproduction is required. For example, when the image that is the sound source is located in the left corner of the monitor TVS, the audio signal is recorded only on the left channel as the sound source, so the front speaker 4 shown by the dashed line in Figure 3 should be installed next to the monitor TV 8. It's fine, but some discrepancies remain.

一般的には、アンプ・VTR等のオーディオ・ビジュア
ル機器をモニターTV8の横に設置する例が多く、音楽
ソフト再生時のステレオ感を出す為、モニターTV8と
離してフロントスピーカ4を設置している。また、リア
ー再生は、フロントスピーカ4と異なる音像定位が要求
され、新たにリアースピーカ9が必要となり、これを駆
動する為にリアー再生用パワーアンプ10が必要となる
Generally, audio/visual equipment such as amplifiers and VTRs are often installed next to the monitor TV 8, and front speakers 4 are installed separately from the monitor TV 8 to create a stereo feeling when playing music software. . Furthermore, rear reproduction requires sound image localization different from that of the front speakers 4, necessitating a new rear speaker 9, and a rear reproduction power amplifier 10 to drive this.

以上の様にオーディオ拳ビジュアルソフト再生時には、
画像と音像の不一致による不自然さ、機器の増設等の問
題点を有していた。
As mentioned above, when playing the audio fist visual software,
There were problems such as unnaturalness due to the mismatch between the image and sound image and the need for additional equipment.

本発明は、上記問題点に鑑み、リアー再生機器の増設な
しで入力されるオーディオ信号をLR各々、逆チャンネ
ルへ混入加算する事により、音像定位を制御し、画像と
音像の一致を図り、拡がり感のある音場を再生できるオ
ーディオ信号再生装置を提供するものである。
In view of the above problems, the present invention controls sound image localization, matches the image and sound image, and spreads the audio signal by mixing and adding the input audio signals to the opposite channels of each LR without adding rear playback equipment. To provide an audio signal reproducing device capable of reproducing a sound field with a sense of sensation.

課題を解決するための手段 この目的を達成するために、本発明のオーディオ信号再
生装置は入力されたオーディオLR主信号を各々減衰調
整する減衰器と、逆チャンネルの減衰器出力と残響信号
と入力された前記オーディオLR主信号を混合加算する
加算器を並列に設け、前記加算器出力を入力とするLR
各々を再生するバーワーアンプ及びスピーカを直列に具
備すると共に前記残響信号を発生するために、L−R成
分作成用の差成分検出回路及び時間遅延用の時間遅延器
、残響信号の片チヤンネル位相反転用の位相反転器から
構成されている。
Means for Solving the Problems To achieve this object, the audio signal reproducing apparatus of the present invention includes an attenuator that adjusts the attenuation of input audio LR main signals, an attenuator output of the opposite channel, a reverberation signal, and an input. An adder for mixing and adding the audio LR main signals is provided in parallel, and an LR whose input is the output of the adder is provided in parallel.
A power amplifier and a speaker for reproducing the respective signals are provided in series, and in order to generate the reverberant signal, a difference component detection circuit for creating L-R components, a time delay device for time delay, and one channel position of the reverberant signal are provided. It consists of a phase inverter for phase inversion.

作用 本発明は、上記した構成により、逆チャンネルへオーデ
ィオ信号を混合することにより、ステレオ分離度が減少
し、聴覚上モノラルに近づく。すなわち、モニターTV
の位置から離した位置にあるフロントスピーカでも、減
衰器の[iにヨリモニターTVの横に虚音像を設定する
ことが可能となる。また残響信号は実際のフロントスピ
ーカ位置から再生され、逆相としているため、中央音像
定位がなく拡がりのある残響信号再生が可能となり、新
たにリアースピーカを増設することなく、画像と音像の
一致、サラウンド等の拡がり感が可能となる。
Effects According to the present invention, by mixing the audio signal to the opposite channel with the above-described configuration, the degree of stereo separation is reduced and the sound approaches monaural sound. That is, monitor TV
Even if the front speakers are located away from the position of the attenuator, it is possible to set a virtual sound image next to the monitor TV at [i] of the attenuator. In addition, since the reverberant signal is reproduced from the actual front speaker position and is in reverse phase, it is possible to reproduce the reverberant signal with a wide spread without central sound image localization, and it is possible to match the image and sound image without adding a new rear speaker. A sense of expansion, such as surround sound, is possible.

実施例 以下、本発明の一実施例について図面を参照しながら説
明する。
EXAMPLE Hereinafter, an example of the present invention will be described with reference to the drawings.

第1図において、左右チャンネルのオーディオ信号(以
下り信号及びR信号という)は各々一対の減衰器IL、
IR1加算器2L、2R及び差成分を検出回路5に与え
られる。差成分検出回路5はこれらの信号の差を検出す
るものであって、その出力は時間遅延器6に与えられる
。時間遅延器6はBBD等によって構成され所定時間信
号を遅延させるものであり、その出力は加算器2L及び
位相反転器7に与えられる。位相反転器7は入力位相を
反転させるものであり、反転出力は加算器2Rに与えら
れる。加算器2LはL信号と減衰器I R,時間遅延器
6の出力を混合加算するものであり、その出力はパワー
アンプ3Lを介してスピーカ4Lに与えられる。又加算
器2RはR信号と減衰器IL及び位相反転器7の出力を
混合加算するものであり、その出力はパワーアンプ3R
を介してスピーカ4Rに与えられる。
In FIG. 1, left and right channel audio signals (hereinafter referred to as "low signal" and "R signal") are each connected to a pair of attenuators IL,
The IR1 adders 2L, 2R and the difference component are provided to the detection circuit 5. A difference component detection circuit 5 detects the difference between these signals, and its output is given to a time delay device 6. The time delay device 6 is constituted by a BBD or the like and delays the signal for a predetermined time, and its output is given to the adder 2L and the phase inverter 7. The phase inverter 7 inverts the input phase, and the inverted output is given to the adder 2R. The adder 2L mixes and adds the L signal, the outputs of the attenuator IR, and the time delay device 6, and its output is given to the speaker 4L via the power amplifier 3L. Further, the adder 2R mixes and adds the R signal and the outputs of the attenuator IL and phase inverter 7, and its output is sent to the power amplifier 3R.
is given to speaker 4R via.

第2図は、第1図のフロントスピーカの設置方法及び音
像定位方向を説明する家庭内の試聴室の平面図である。
FIG. 2 is a plan view of a domestic listening room for explaining the installation method and sound image localization direction of the front speakers shown in FIG. 1.

第2図において、4はフロントスピーカ、8はモニター
TVである。
In FIG. 2, 4 is a front speaker and 8 is a monitor TV.

以下、本実施例のオーディオ信号再生装置の動作につい
て説明する。
The operation of the audio signal reproducing apparatus of this embodiment will be explained below.

第1図において、入力されたオーディオLR主信号は、
減衰器1によりL信号はα1倍、R信号はα2倍(但し
、O≦α5.α2≦1)され、加算器2に入力され、互
いに逆チャンネルのオーディオLR主信号に混合加算さ
れる。ここで、入力されたオーディオLR主信号を各々
、Lln、Rln、加算器2の出力を各々L out 
、 Routとすると1残響信号をφとすれば、 L out: L 1n+ α2 ” Rin    
   ■Rout= RIn+ a H* L In 
      ■となる。ここでα1=α2=1の時はス
テレオ最大、α1=α2=1の時はモノラル出力となる
。すなわち、モノラル時は第2図で示した左右のフロン
トスピーカ4は、両方とも、同一信号を出力する事にな
り、音像は、中央正面となることが知られている。この
音像定位現象を使用したのが本発明の原理であり、減衰
器2の係数α5.α2を0くα。
In FIG. 1, the input audio LR main signal is
The attenuator 1 multiplies the L signal by α1 and the R signal by α2 (O≦α5.α2≦1), and inputs them to the adder 2, where they are mixed and added to audio LR main signals of opposite channels. Here, the input audio LR main signals are Lln and Rln, and the output of the adder 2 is L out.
, Rout and one reverberant signal as φ, L out: L 1n+ α2 ” Rin
■Rout= RIn+ a H* L In
■It becomes. Here, when α1=α2=1, the output is maximum stereo, and when α1=α2=1, the output is monaural. That is, it is known that in monaural mode, both the left and right front speakers 4 shown in FIG. 2 output the same signal, and the sound image is centered in front. The principle of the present invention is to use this sound image localization phenomenon, and the coefficient α5 of the attenuator 2. α2 minus α.

α2く1に調整することにより、フロン1トスピーカ4
の間の任意の位置に音像定位することが可能である。す
なわち、第2図に示すごとく、フロントスピーカ4をモ
ニターTV8により離れた位置に設置しても前記(1)
、  (2)で示した逆チャンネルのクロストーク量を
変化させることで、モニターTV8の両脇に一点鎖線で
示したごとく、音像定位することになり、画像と音像を
一致させることが可能となる。
By adjusting α2×1, front 1 speaker 4
It is possible to localize the sound image to any position between the two. That is, as shown in FIG. 2, even if the front speakers 4 are installed at a remote position due to the monitor TV 8, the above (1)
By changing the crosstalk amount of the opposite channel shown in (2), the sound image will be localized as shown by the dashed lines on both sides of the monitor TV8, making it possible to match the image and sound image. .

次に残響信号について説明する。残響信号はL−R成分
で記録されており、通常、第1図に示すごとく、差成分
検出回路5及び、時間遅延器6により生成される。生成
された残響信号は、加算器2の片チャンネルに混合する
と共に、位相反転器7を通して、位相反転したのち、他
の片チャンネルに混合する。互いに位相反転した残響信
号をフロントスピーカ4より出力すれば同一信号でも、
中央に音像定位をせず、またフロントスピーカ4の位置
から聴こえることになる。つまり、LR主信号は、モニ
ターTVS付近で音像定位し、残響信号は、第2図の破
線で示したごとくフロントスピーカ4で音像定位するの
で、残響信号のもつ、音場拡大効果が得られる。
Next, the reverberation signal will be explained. The reverberation signal is recorded as LR components, and is normally generated by a difference component detection circuit 5 and a time delay device 6, as shown in FIG. The generated reverberation signal is mixed into one channel of the adder 2, and after having its phase inverted through a phase inverter 7, it is mixed into another channel. If reverberant signals with mutually inverted phases are output from the front speaker 4, even if the signals are the same,
The sound image is not localized at the center, and the sound is heard from the position of the front speaker 4. That is, the LR main signal has a sound image localized near the monitor TVS, and the reverberation signal has a sound image localization at the front speaker 4 as shown by the broken line in FIG. 2, so that the sound field expansion effect of the reverberation signal can be obtained.

以上のように本実施例によれば新たに残響信号再生機器
の増設なしで残響効果が得られ、かつオーディオ・ビジ
ュアルソフトの再生に、画像と音像とを一致させること
が簡単な回路構成で実現することができる。
As described above, according to this embodiment, a reverberation effect can be obtained without adding new reverberation signal reproduction equipment, and a simple circuit configuration can achieve matching of images and sound images when playing audio/visual software. can do.

発明の効果 本発明は、オーディオ・ビジュアルソフト再生における
機器の設置状態及び画像と音像の自然さに着目し、オー
ディオ信号のクロストーク量を変化させることで、音像
定位を任意に制御でき、画像と音像の一体感が得られる
と共に、残響効果も機器の増設なしで容易に実現できる
オーディオ信号再生装置である。
Effects of the Invention The present invention focuses on the installation state of equipment and the naturalness of images and sound images in audio/visual software playback, and by changing the amount of crosstalk of audio signals, the sound image localization can be controlled arbitrarily, and the image and sound image can be controlled as desired. This is an audio signal reproducing device that not only provides a sense of unity in the sound image, but also allows reverberation effects to be easily achieved without adding additional equipment.

【図面の簡単な説明】[Brief explanation of drawings]

第1図は本発明の一実施例におけるオーディオ信号再生
装置の構成を示すブロック図、第2図は第1図のフロン
トスピーカ設置方法及び音像定位方向を説明する家庭内
の試聴室の平面図、第3図は従来のオーディオ・ビジュ
アル機器の設置方法及び音像定位方向説明図、第4図は
第3図の従来のオーディオ信号再生装置の構成を示すブ
ロック図である。 IL、IR・・・減衰器、  2L、2R・・・加算器
、3L、3R・・・フロント再生用パワーアンプ、4L
、4R・・・フロントスピーカ、5・・・差成分検出回
路、6・・・時間遅延器、7・・・位相反転器、8・・
・モ二ターTV。 9・・・リアースピーカ、 10・・・リア再 牛用パワーアンプ。
FIG. 1 is a block diagram showing the configuration of an audio signal reproducing device according to an embodiment of the present invention; FIG. 2 is a plan view of a domestic listening room illustrating the front speaker installation method and sound image localization direction of FIG. 1; FIG. 3 is a diagram illustrating a conventional audio-visual equipment installation method and sound image localization direction, and FIG. 4 is a block diagram showing the configuration of the conventional audio signal reproducing apparatus shown in FIG. 3. IL, IR...attenuator, 2L, 2R...adder, 3L, 3R...power amplifier for front reproduction, 4L
, 4R...Front speaker, 5...Difference component detection circuit, 6...Time delay device, 7...Phase inverter, 8...
・Monitor TV. 9...Rear speaker, 10...Rear power amplifier.

Claims (1)

【特許請求の範囲】[Claims] 左右チャンネルのオーディオ信号(以下L信号及びR信
号)を各々減衰させるL及びR信号用の一対の減衰器と
、前記L信号及びR信号の差成分を検出する差成分検出
回路と、前記差成分検出回路の出力を遅延する時間遅延
器と、前記時間遅延器の遅延出力の位相を反転させる位
相反転器と、前記L信号及びR信号、前記一対の減衰器
の逆チャンネルの減衰出力、及び前記位相反転器の入出
力端より互いに位相が反転した残響信号を混合加算する
一対の加算器とを具備し、前記各加算器出力を左右のス
ピーカに与えて再生することを特徴としたオーディオ信
号再生装置。
a pair of attenuators for L and R signals that respectively attenuate left and right channel audio signals (hereinafter referred to as L signal and R signal); a difference component detection circuit that detects a difference component between the L signal and R signal; and a difference component. a time delay device that delays the output of the detection circuit; a phase inverter that inverts the phase of the delayed output of the time delay device; the L signal and the R signal; the attenuated outputs of opposite channels of the pair of attenuators; and a pair of adders that mix and add reverberant signals whose phases are inverted to each other from the input and output ends of a phase inverter, and the outputs of each of the adders are given to left and right speakers for reproduction. Device.
JP63237634A 1988-09-22 1988-09-22 Audio signal reproducing device Pending JPH0286398A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP63237634A JPH0286398A (en) 1988-09-22 1988-09-22 Audio signal reproducing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP63237634A JPH0286398A (en) 1988-09-22 1988-09-22 Audio signal reproducing device

Publications (1)

Publication Number Publication Date
JPH0286398A true JPH0286398A (en) 1990-03-27

Family

ID=17018233

Family Applications (1)

Application Number Title Priority Date Filing Date
JP63237634A Pending JPH0286398A (en) 1988-09-22 1988-09-22 Audio signal reproducing device

Country Status (1)

Country Link
JP (1) JPH0286398A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7218740B1 (en) 1999-05-27 2007-05-15 Fujitsu Ten Limited Audio system
JP2011505105A (en) * 2007-11-28 2011-02-17 クゥアルコム・インコーポレイテッド Method and apparatus for providing an interface to a processing engine utilizing intelligent speech mixing technology
US8660280B2 (en) 2007-11-28 2014-02-25 Qualcomm Incorporated Methods and apparatus for providing a distinct perceptual location for an audio source within an audio mixture

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7218740B1 (en) 1999-05-27 2007-05-15 Fujitsu Ten Limited Audio system
JP2011505105A (en) * 2007-11-28 2011-02-17 クゥアルコム・インコーポレイテッド Method and apparatus for providing an interface to a processing engine utilizing intelligent speech mixing technology
US8660280B2 (en) 2007-11-28 2014-02-25 Qualcomm Incorporated Methods and apparatus for providing a distinct perceptual location for an audio source within an audio mixture

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