JPH06125600A - Three speaker system - Google Patents
Three speaker systemInfo
- Publication number
- JPH06125600A JPH06125600A JP4272925A JP27292592A JPH06125600A JP H06125600 A JPH06125600 A JP H06125600A JP 4272925 A JP4272925 A JP 4272925A JP 27292592 A JP27292592 A JP 27292592A JP H06125600 A JPH06125600 A JP H06125600A
- Authority
- JP
- Japan
- Prior art keywords
- speaker
- signal
- signals
- correlation value
- divided
- 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.)
- Granted
Links
Landscapes
- Stereophonic System (AREA)
- Circuit For Audible Band Transducer (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は、ステレオ信号再生方式
の音響装置で使用される3スピーカシステムに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a three-speaker system used in a stereo signal reproducing type audio apparatus.
【0002】[0002]
【従来の技術】本発明に係る従来の技術して例えば特開
平3−9700号公報がある。この公報には左、右及び
中央のスピーカの駆動信号を次の数1のように設定する
ことが示されている。2. Description of the Related Art As a conventional technique according to the present invention, there is, for example, Japanese Patent Laid-Open No. 3-9700. This publication shows that the drive signals for the left, right, and center speakers are set as in the following equation 1.
【0003】[0003]
【数1】 [Equation 1]
【0004】このように従来は各スピーカに駆動信号を
供給することによって、聴取者から見て左右のスピーカ
間隔が相対的に大きい場合にも、音像の中抜け現象を抑
制し、且つ左右のスピーカ用原信号の分離を良くして十
分なステレオ感を得ることができる3スピーカシステム
を提供しようとしていた。As described above, conventionally, by supplying a drive signal to each speaker, even when the distance between the left and right speakers is relatively large from the listener's perspective, the phenomenon of hollowing out of the sound image is suppressed, and the left and right speakers are suppressed. An attempt has been made to provide a three-speaker system capable of improving separation of original signals and obtaining a sufficient stereo feeling.
【0005】[0005]
【発明が解決しようとする課題】しかしながら通常ステ
レオ信号には周波数成分が異なり、位置(方向)も異な
る複数の音源からの信号が含まれており、これらを別々
に処理する必要がある。前述した従来の方法では、全て
の信号を同一に処理してしまうという欠点があった。However, a stereo signal usually contains signals from a plurality of sound sources having different frequency components and different positions (directions), and these need to be processed separately. The conventional method described above has a drawback that all signals are processed in the same manner.
【0006】また前記数1から明らかなように、音場の
拡がり感を出すためにER とEL の信号を逆位相にする
場合には分母が非常に小さくなって生成信号が発散する
という問題点があった。Further, as is clear from the above formula 1, when the signals of E R and E L are made to have opposite phases in order to give a feeling of expansion of the sound field, the denominator becomes very small and the generated signal diverges. There was a problem.
【0007】さらにER とEL の信号がほとんど無相関
な場合にも中央のスピーカから音が出るという問題点も
あった。Further, there is a problem that sound is emitted from the central speaker even when the E R and E L signals are almost uncorrelated.
【0008】そこで本発明は複数の音源からの信号が含
まれている信号の場合にも夫々別々に、且つER とEL
が逆位相で、無関係な場合に於ても聴取者から見て左右
のスピーカの間隔が相対的に大きい場合にも音像の中抜
け現象をなくして、しかもE R とEL の分離を良くして
十分なステレオ感を得ることができる3スピーカシステ
ムを提供することを目的とするものである。Therefore, the present invention includes signals from a plurality of sound sources.
In case of rare signals, ER And EL
Is the opposite phase, left and right as seen by the listener even when they are unrelated
Even if the speaker spacing of the
Eliminates the phenomenon R And EL The separation of
3-speaker system that can obtain a sufficient stereo feeling
It is intended to provide a system.
【0009】[0009]
【課題を解決するための手段】本発明は、左スピーカ用
原信号及び右スピーカ用原信号と、左右に夫々配置され
前記各信号によって駆動される左スピーカ及び右スピー
カと、これら両スピーカ間に配置された中央スピーカ
と、前記左スピーカ用信号及び右スピーカ用信号を複数
の帯域に分割する帯域通過フィルタと、帯域分割された
前記各スピーカ用信号の相関値を算出する相関値算出部
と、該相関値算出部の算出値により左スピーカ用駆動信
号及び右スピーカ用駆動信号と中央スピーカ用駆動信号
を生成する信号分配手段とよりなるものである。According to the present invention, an original signal for a left speaker and an original signal for a right speaker, a left speaker and a right speaker which are respectively arranged on the left and right and are driven by the respective signals, and between these two speakers. A central speaker arranged, a band pass filter that divides the left speaker signal and the right speaker signal into a plurality of bands, a correlation value calculation unit that calculates a correlation value of each band-divided speaker signal, The signal distribution means generates a left speaker drive signal, a right speaker drive signal, and a center speaker drive signal according to the calculated values of the correlation value calculation section.
【0010】[0010]
【作用】上記の構成によれば、複数の音源からの信号が
含まれている信号の場合や、夫々別々に且つER とEL
が逆位相の場合や、聴取者から見て左右のスピーカ間隔
が相対的に大きい場合に音像の中抜け現象を抑制でき、
しかもER とEL の分離を良くして十分なステレオ感を
得ることができる。According to the above construction, in the case of a signal containing signals from a plurality of sound sources, or in the case of signals separately from each other, E R and E L
When the phase is opposite, or when the distance between the left and right speakers is relatively large when viewed from the listener, it is possible to suppress the phenomenon of hollowing out of the sound image.
Moreover, the separation between E R and E L can be improved to obtain a sufficient stereo feeling.
【0011】[0011]
【実施例】以下本発明の3スピーカシステムの一実施例
について図面を参照しながら詳細に説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the three-speaker system of the present invention will be described in detail below with reference to the drawings.
【0012】図1は3スピーカシステムのブロック図で
あり、左チャンネル信号(原信号)EL と右チャンネル
信号(原信号)ER とを夫々n個の帯域通過フィルタL
i(L1〜Ln)、Ri(R1〜Rn)で帯域分割し、
その帯域分割された左右チャンネル信号をn個の信号生
成器γi(γ1〜γn)で左右及び中央のスピーカ駆動
信号用出力に変え、各出力を加算器A1〜A3で加算し
て左右及び中央のスピーカ駆動用信号EL ’、ER ’、
EC ’を作成するように構成されている。FIG. 1 is a block diagram of a three-speaker system, in which the left channel signal (original signal) E L and the right channel signal (original signal) E R are respectively n band pass filters L.
band division by i (L1 to Ln) and Ri (R1 to Rn),
The band-divided left and right channel signals are converted into left and right and center speaker drive signal outputs by n signal generators γi (γ1 to γn), and the outputs are added by adders A1 to A3 to add left and right and center signals. Speaker drive signals E L ', E R ',
It is configured to create E C '.
【0013】前記信号生成器γiは図2に示すように相
関値算出器riと信号分配器Sとより構成され、次のよ
うに動作する。すなわち、帯域通過フィルタLi、Ri
で帯域分割された左右チャンネル信号から、相関値算出
器riにおいて次の数2にしたがって相関値Rt,i を算
出する。The signal generator γi comprises a correlation value calculator ri and a signal distributor S as shown in FIG. 2, and operates as follows. That is, the band pass filters Li, Ri
In the correlation value calculator ri, the correlation value R t, i is calculated from the left and right channel signals band-divided in step 1 according to the following equation 2.
【0014】[0014]
【数2】 [Equation 2]
【0015】さらに算出された相関値Rt,i と左右のチ
ャンネル信号から信号分配器Sに於て左右及び中央のス
ピーカ駆動用信号EL ’、ER ’、EC ’が生成され
る。以下の数式は係る信号を生成するための規則の一実
施例である。Further, from the calculated correlation value R t, i and the left and right channel signals, the signal distributor S generates left and right and center speaker driving signals E L ′, E R ′, E C ′. The following equation is an example of a rule for generating such a signal.
【0016】[0016]
【数3】 [Equation 3]
【0017】[0017]
【数4】 [Equation 4]
【0018】ただし上記数3及び数4の場合は相関値R
t,i の符号によって信号の算出式を条件分岐させている
例である。However, in the case of the above equations 3 and 4, the correlation value R
In this example, the signal calculation formula is conditionally branched depending on the signs of t and i .
【0019】[0019]
【発明の効果】以上の説明のように本発明によれば複数
の音源からの信号が含まれているスピーカ用信号の場
合、夫々別々にしかもER とEL とが逆位相で無相関な
場合、聴取者から見て左右のスピーカの間隔が相対的に
大きい場合に音像の中抜け現象を抑制し、且つER とE
L との分離を良くして十分なステレオ感を得ることがで
きる3スピーカシステムを提供できる効果が期待でき
る。As described above, according to the present invention, in the case of a speaker signal containing signals from a plurality of sound sources, E R and E L are anti-phase and uncorrelated with each other. In this case, when the distance between the left and right speakers is relatively large when viewed from the listener, the phenomenon of hollowing out of the sound image is suppressed, and E R and E
The effect of providing a three-speaker system that can obtain a sufficient stereo feeling by improving the separation from L can be expected.
【図1】本発明の3スピーカシステムのブロック図であ
る。FIG. 1 is a block diagram of a three speaker system of the present invention.
【図2】図1の信号生成器を説明する詳細図である。FIG. 2 is a detailed diagram illustrating the signal generator of FIG.
EL 左スピーカ用原信号 ER 右スピーカ用原信号 EL ’ 左スピーカ駆動信号 ER ’ 右スピーカ駆動信号 EC ’ 中央スピーカ駆動信号 L1〜Ln 左チャンネル用帯域通過フィルタ R1〜Rn 右チャンネル用帯域通過フィルタ ri 相関値算出器 S 信号分配器E L Left speaker original signal E R Right speaker original signal E L 'Left speaker drive signal E R ' Right speaker drive signal E C 'Center speaker drive signal L1 to Ln Left channel band pass filter R1 to Rn Right channel Band pass filter ri Correlation value calculator S Signal distributor
Claims (1)
信号と、左右に夫々配置され前記各信号によって駆動さ
れる左スピーカ及び右スピーカと、これら両スピーカ間
に配置された中央スピーカと、前記左スピーカ用信号及
び右スピーカ用信号を複数の帯域に分割する帯域通過フ
ィルタと、帯域分割された前記各スピーカ用信号の相関
値を算出する相関値算出部と、該相関値算出部の算出値
により左スピーカ用駆動信号及び右スピーカ用駆動信号
と中央スピーカ用駆動信号を生成する信号分配手段とよ
りなる3スピーカシステム。1. An original signal for a left speaker and an original signal for a right speaker, a left speaker and a right speaker which are respectively arranged on the left and right and driven by each of the signals, and a central speaker arranged between these speakers, A band pass filter that divides the left speaker signal and the right speaker signal into a plurality of bands, a correlation value calculation unit that calculates the correlation value of each band-divided speaker signal, and a calculation value of the correlation value calculation unit A three-speaker system comprising: a left speaker drive signal, a right speaker drive signal, and a signal distribution means for generating a central speaker drive signal.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP27292592A JP3296600B2 (en) | 1992-10-12 | 1992-10-12 | 3 speaker system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP27292592A JP3296600B2 (en) | 1992-10-12 | 1992-10-12 | 3 speaker system |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH06125600A true JPH06125600A (en) | 1994-05-06 |
JP3296600B2 JP3296600B2 (en) | 2002-07-02 |
Family
ID=17520671
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP27292592A Expired - Fee Related JP3296600B2 (en) | 1992-10-12 | 1992-10-12 | 3 speaker system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3296600B2 (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0836399A (en) * | 1994-07-21 | 1996-02-06 | Sony Corp | Processing device for audio coded data |
JPH1028097A (en) * | 1996-07-10 | 1998-01-27 | Canon Inc | Stereo signal processor |
JPH1051900A (en) * | 1996-04-15 | 1998-02-20 | Samsung Electron Co Ltd | Table lookup system stereo reproducing device and its signal processing method |
JP2004504787A (en) * | 2000-07-19 | 2004-02-12 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | Multi-channel stereo converter to obtain stereo surround and / or audio center signal |
JP2005354695A (en) * | 2004-06-08 | 2005-12-22 | Bose Corp | Audio signal processing |
JP2010087783A (en) * | 2008-09-30 | 2010-04-15 | Pioneer Electronic Corp | Acoustic device, acoustic signal processing method, acoustic signal processing program and recording medium |
JP2012119728A (en) * | 2010-11-29 | 2012-06-21 | Yamaha Corp | Audio channel extension device |
JP2018133660A (en) * | 2017-02-14 | 2018-08-23 | 日本放送協会 | Audio-signal compensation device, audio-signal compensation method, and program |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110719564B (en) * | 2018-07-13 | 2021-06-08 | 海信视像科技股份有限公司 | Sound effect processing method and device |
-
1992
- 1992-10-12 JP JP27292592A patent/JP3296600B2/en not_active Expired - Fee Related
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0836399A (en) * | 1994-07-21 | 1996-02-06 | Sony Corp | Processing device for audio coded data |
JPH1051900A (en) * | 1996-04-15 | 1998-02-20 | Samsung Electron Co Ltd | Table lookup system stereo reproducing device and its signal processing method |
JPH1028097A (en) * | 1996-07-10 | 1998-01-27 | Canon Inc | Stereo signal processor |
JP2004504787A (en) * | 2000-07-19 | 2004-02-12 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | Multi-channel stereo converter to obtain stereo surround and / or audio center signal |
JP4870896B2 (en) * | 2000-07-19 | 2012-02-08 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | Multi-channel stereo converter to obtain stereo surround and / or audio center signal |
JP2005354695A (en) * | 2004-06-08 | 2005-12-22 | Bose Corp | Audio signal processing |
US8099293B2 (en) | 2004-06-08 | 2012-01-17 | Bose Corporation | Audio signal processing |
US8295496B2 (en) | 2004-06-08 | 2012-10-23 | Bose Corporation | Audio signal processing |
JP2010087783A (en) * | 2008-09-30 | 2010-04-15 | Pioneer Electronic Corp | Acoustic device, acoustic signal processing method, acoustic signal processing program and recording medium |
JP2012119728A (en) * | 2010-11-29 | 2012-06-21 | Yamaha Corp | Audio channel extension device |
JP2018133660A (en) * | 2017-02-14 | 2018-08-23 | 日本放送協会 | Audio-signal compensation device, audio-signal compensation method, and program |
Also Published As
Publication number | Publication date |
---|---|
JP3296600B2 (en) | 2002-07-02 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
LAPS | Cancellation because of no payment of annual fees |