JPS61265999A - Pseudo stereo system - Google Patents
Pseudo stereo systemInfo
- Publication number
- JPS61265999A JPS61265999A JP60108014A JP10801485A JPS61265999A JP S61265999 A JPS61265999 A JP S61265999A JP 60108014 A JP60108014 A JP 60108014A JP 10801485 A JP10801485 A JP 10801485A JP S61265999 A JPS61265999 A JP S61265999A
- Authority
- JP
- Japan
- Prior art keywords
- audio signal
- supplied
- signal
- sound
- mixed audio
- 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
Links
Classifications
-
- 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
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2499/00—Aspects covered by H04R or H04S not otherwise provided for in their subgroups
- H04R2499/10—General applications
- H04R2499/13—Acoustic transducers and sound field adaptation in vehicles
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、例えば２チヤンネル・ステレオを４チヤンネ
ル・ステレオとして聴く様にした擬似ステレオ方式に関
する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a pseudo-stereo system in which, for example, 2-channel stereo is listened to as 4-channel stereo.
本発明は、例えば２チヤンネル・ステレオを４チヤンネ
ル・ステレオとして聴く様にした擬似ステレオ方式にお
いて、前方左及び右スピーカーに供給する左及び右音声
信号から之等の混合音声信号及びこの混合音声信号を所
定時間遅延した遅延混合音声信号を得る様にし、この混
合音声信号と遅延混合音声信号との加算信号を一方の後
方スピーカーに供給し、この遅延混合音声信号と混合音
声信号との減算信号を他方の後方スピーカーに供給する
と共に、この混合音声信号又は遅延混合音声信号の少な
くとも一方の信号レベルを可変することによって、音源
に適した音場の拡がり感を得ることができるようにした
ものである。The present invention provides a mixed audio signal such as left and right audio signals supplied to front left and right speakers, and a mixed audio signal such as this, in a pseudo-stereo system in which 2-channel stereo is listened to as 4-channel stereo. A delayed mixed audio signal delayed by a predetermined time is obtained, a sum signal of this mixed audio signal and the delayed mixed audio signal is supplied to one rear speaker, and a subtracted signal of this delayed mixed audio signal and the mixed audio signal is supplied to the other rear speaker. By supplying the mixed audio signal to the rear speakers and varying the signal level of at least one of the mixed audio signal or the delayed mixed audio signal, it is possible to obtain a sense of expansion of the sound field suitable for the sound source.
（従来の技術〕
従来、２チヤンネル・ステレオを４チヤンネル・ステレ
オとして聴く様にした擬似ステレオ方式としては、第３
図に示す如きものが提案されている。(Prior art) Conventionally, as a pseudo-stereo system that allows 2-channel stereo to be heard as 4-channel stereo, the third
Something like the one shown in the figure has been proposed.
この第３図に於いて、（１）及び（２）はＺチャンネル
・ステレオ信号の左音声信号り及び右音声信号Ｒ，が夫
々供給される左及び右音声信号入力端子を示し、この左
及び右音声信号入力端子（１）及び（２）に夫々供給さ
れる左及び右音声信号り及びＲを増幅器（３）及び（４
）を介して夫々第４図に示す如く聴取者Ｍの前方に配さ
れた前方左及び右スピーカ−（５）及び（６）に夫々供
給する如くし、また左及び右音声信号入力端子（１）及
び（２）に供給される左及び右音声信号り及びＲを夫々
左音声信号を得る引算回路（７）の入力側に供給し、こ
の引算回路（７）の出力側に得られる左音声出力（Ｌ−
Ｒ）を遅延回路（８）に供給し、この遅延回路（８）の
出力側に得られる所定時間遅延された遅延差音声信号Δ
ｔ （Ｌ−Ｒ）を増幅器（９）及び（１０）を介して夫
々第４図に示す如（聴取者Ｍの後方に配された後方左及
び右スピーカ−（１１）及び（１２）に夫々供給される
如く構成されている。In this FIG. 3, (1) and (2) indicate the left and right audio signal input terminals to which the left and right audio signals R, respectively, of the Z channel stereo signal are supplied; The left and right audio signals R and R supplied to the right audio signal input terminals (1) and (2), respectively, are connected to amplifiers (3) and (4).
) to the front left and right speakers (5) and (6), respectively, arranged in front of the listener M as shown in FIG. 4, and the left and right audio signal input terminals (1 ) and (2) are supplied to the input side of a subtraction circuit (7) for obtaining a left audio signal, respectively, and the left and right audio signals R and R supplied to the left and right audio signals are respectively supplied to the input side of a subtraction circuit (7) for obtaining a left audio signal, and the subtraction circuit (7) obtains the left audio signal at the output side of the subtraction circuit (7). Left audio output (L-
R) is supplied to a delay circuit (8), and a delayed difference audio signal Δ delayed by a predetermined time is obtained at the output side of this delay circuit (8).
t (L-R) through amplifiers (9) and (10), respectively, to the rear left and right speakers (11) and (12), respectively, as shown in FIG. It is configured to be supplied.
斯る擬似ステレオ方式は、左及び右音声信号し及びＲを
前方左及び右スピーカ−（５）及び（６）に夫々供給す
ると共に、この左及び右音声信号り及びＲの左音声信号
＜Ｌ−Ｒ）を所定時間遅延した遅延差音声信号Δｔ
（Ｌ−Ｒ）が後方左及び右スピーカ−（１１）及び（１
２）に夫々供給され、ステレオ臨場感が得られるもので
ある。Such a pseudo-stereo system supplies the left and right audio signals and R to the front left and right speakers (5) and (6), respectively, and the left and right audio signals and R's left audio signal <L. -R) delayed by a predetermined time delay difference audio signal Δt
(L-R) are rear left and right speakers - (11) and (1)
2) respectively, and a stereo sense of presence can be obtained.
しかしながら、斯る従来の擬似ステレオ方式においては
、後方左及び右スピーカ−（１１）及び（１２）に供給
される音声信号、所謂サラウンド信号は遅延差音声信号
のみであり、後方左及び右スピーカ−（１１）及び（１
２）から供給される音は全く拡がりが無いため、映画館
の様な所で再生されるのなら良いが、一般家庭で再生さ
れる場合にはもの足りないという不都合がある。However, in such a conventional pseudo-stereo system, the audio signals supplied to the rear left and right speakers (11) and (12), the so-called surround signals, are only delay difference audio signals; (11) and (1
Since the sound supplied from 2) has no spread at all, it is fine if it is played in a place such as a movie theater, but it is inconvenient that it is insufficient when played in a general home.
、更に映画再生においては、特に前方定位が重視される
ため、後方スピーカーに供給される音声信号に時間的遅
延を行って前方の音声信号よりも必ず遅れて出る様にし
てハース効果によって音を前方に定位するようにしてい
るが、音楽再生の場合には、多くの場合、残響成分は時
間的遅れを伴っているため、左音声信号成分から後方ス
ピーカー音声信号を取り出す場合には、さほど遅延する
必要がない。Furthermore, in movie playback, front localization is particularly important, so the audio signal supplied to the rear speakers is time-delayed so that it always comes out later than the front audio signal, and the Haas effect is used to direct the sound to the front. However, in the case of music playback, the reverberation components are often accompanied by a time delay, so when extracting the rear speaker audio signal from the left audio signal component, there is a considerable delay. There's no need.
本発明は、斯る点に鑑み、音源に通した音場の拡がり感
を得ることができる擬似ステレオ方式を提供せんとする
ものである。In view of this, the present invention aims to provide a pseudo-stereo system that can provide a sense of expansion of the sound field through the sound source.
本発明に依る擬似ステレオ方式は、第１図に示す如く、
前方左及び右スピーカ−（５）及び（６）に供給する左
及び右音声信号を夫々混合回路（７）に供給し、この混
合回路（７）の出力側に得られる混合音声信号とこの混
合音声信号の所定時間遅延した遅延混合音声信号との加
算信号を一方の後方スピーカー（１１）に供給する第１
のサラウンド信号とすると共にこの遅延混合音声信号と
混合音声信号との減算信号を他方の後方スピーカー（１
２）に供給する第２のサラウンド信号とする様にし、こ
の混合音声信号又は遅延混合音声信号の少なくとも一方
の信号レベルを可変して音場の拡がり感を得る様にした
ものである。The pseudo-stereo system according to the present invention is as shown in FIG.
The left and right audio signals supplied to the front left and right speakers (5) and (6) are respectively supplied to a mixing circuit (7), and the mixed audio signal obtained at the output side of this mixing circuit (7) and this mixture are A first supplying a sum signal of the audio signal and the delayed mixed audio signal delayed by a predetermined time to one of the rear speakers (11);
surround signal and the subtracted signal of this delayed mixed audio signal and mixed audio signal to the other rear speaker (1
2), and the signal level of at least one of the mixed audio signal or the delayed mixed audio signal is varied to obtain a sense of expansion of the sound field.
斯る本発明に依れば、一方の後方スピーカー（１１）に
は混合音声信号と遅延混合音声信号との加算信号が供給
され、他方の後方スピーカー（１２）には遅延混合音声
信号と混合音声信号との減算信号が供給されるから、混
合音声信号又は遅延混合音声信号のうちいずれかの音声
信号レベルを可変し、例えば混合音声信号レベルを遅延
混合音声信号レベルよりも高くすると、後方左及び右ス
ピーカ−（１１）及び（１２）からは遅延混合音声信号
よりも混合音声信号が強調されて供給されるから、音場
は拡がり感を増し、音楽再生に最適な音場の拡がり感を
得ることができ、逆に混合音声信号レベルを遅延混合音
声信号レベルよりも低くすると、後方左及び右スピーカ
−（１１）及び（１２）からは混合音声信号よりも遅延
混合音声信号が強調されて供給されるから、音場は拡が
り感を減じ、映画再生に最適な音場の拡がり感を得るこ
とができ、 ・この様にして音源に適した音場の拡が
り感を得る。According to the present invention, one rear speaker (11) is supplied with the sum signal of the mixed audio signal and the delayed mixed audio signal, and the other rear speaker (12) is supplied with the delayed mixed audio signal and the mixed audio signal. Since a subtraction signal from the signal is supplied, if the audio signal level of either the mixed audio signal or the delayed mixed audio signal is varied, and the mixed audio signal level is made higher than the delayed mixed audio signal level, for example, the rear left and Since the mixed audio signal is more emphasized than the delayed mixed audio signal and is supplied from the right speakers (11) and (12), the sound field becomes more spacious, and a sound field that is optimal for music reproduction is obtained. Conversely, if the mixed audio signal level is lower than the delayed mixed audio signal level, the delayed mixed audio signal is emphasized and supplied from the rear left and right speakers (11) and (12) than the mixed audio signal. This reduces the sense of spaciousness in the sound field and provides a sense of widening of the sound field that is optimal for movie playback.In this way, a sense of widening of the sound field suitable for the sound source can be obtained.
以下、第１図を参照して本発明の擬似ステレオ方式の一
実施例を説明しよう、この第１図に於いて第３図に対応
する部分には同一符号を付し、その詳細説明は省略する
。Hereinafter, an embodiment of the pseudo stereo system of the present invention will be explained with reference to FIG. 1. In FIG. 1, parts corresponding to those in FIG. do.
この第１図においては、左及び右音声信号入力端子＋１
）及び（２）に夫々供給される左及び右音声信号り及び
Ｒを夫々ボリウム（１３）及び（１４）と増幅器（３）
及び（勾の直列回路を介して前方左及び右スピーカ−（
５）及び（６）に供給する如くし、またこの左及び右音
声信号入力端子（１）及び（２）を夫々引算回路（７）
の入力側に接続し、この引算回路（７）の出力側に左及
び右音声信号入力端子（１）及び（２）に供給される左
及び右音声信号の左音声信号（Ｌ−Ｒ）を得る如くする
。In this Figure 1, left and right audio signal input terminals +1
) and (2) respectively, the left and right audio signals R and R are respectively supplied to the volumes (13) and (14) and the amplifier (3).
and the front left and right speakers (via the gradient series circuit).
5) and (6), and these left and right audio signal input terminals (1) and (2) are respectively connected to a subtraction circuit (7).
The left audio signal (L-R) of the left and right audio signals is connected to the input side of the subtraction circuit (7) and is supplied to the left and right audio signal input terminals (1) and (2) on the output side of this subtraction circuit (7). I will try to get it.
次にこの引算回路（７）の出力側を抵抗器（１５）を介
して増幅器（１６）の入力端に接続すると共にこの抵抗
器（１５）と増幅器（１６）の接続中点を抵抗器（１７
）及び（１８）の直列回路を介して接地し、この抵抗器
（１７）と抵抗器（１８）との接続中点を可動接点（１
９ａ ）を接地した切換スイッチ（１９）の一方の固定
接点（１９ｂ）に接続し、この増幅器（１６）の出力側
を抵抗器（２０）を介して加算器を構成する演算増幅器
（２１）の反転端子ｅに接続すると共に抵抗器（２２）
を介して減算器を構成する演算増幅器（２３）の非反転
端子のに接続する。Next, the output side of this subtraction circuit (7) is connected to the input terminal of an amplifier (16) via a resistor (15), and the midpoint of the connection between this resistor (15) and the amplifier (16) is connected to the resistor (15). (17
) and (18), and connect the middle point between the resistors (17) and (18) to the movable contact (1).
9a) is connected to one fixed contact (19b) of a grounded changeover switch (19), and the output side of this amplifier (16) is connected to the operational amplifier (21) constituting the adder via a resistor (20). Connect to inverting terminal e and resistor (22)
is connected to the non-inverting terminal of the operational amplifier (23) constituting the subtracter.
また引算回路（７）の出力側を左音声信号（Ｌ−Ｒ）を
所定時間遅延する例えばＢＢＤにより構成された遅延回
路（８）、このＢＢＤに使用されるクロックパルス等の
高域周波数成分を除去する低域通過フィルター（２４）
及び抵抗器（２５）の直列回路を介して増＠器（２６）
の入力側に接続すると共にこの抵抗器（２５）と増幅器
（２６）の接続中点を抵抗器（２７）と抵抗器（２８）
との直列回路を介して接地し、この抵抗器（２７）と抵
抗器（２８）との接続中点を切換スイッチ（１９）の他
方の固定接点（１９ｃ）に接続し、この増幅器（２６）
の出力側を抵抗器（２９）を介して演算増幅器（２１）
の反転端子ｅに接続すると共に抵抗器（３０）を介して
演算増幅器（２３）の反転端子ｅに接続する。Also, a delay circuit (8) configured by a BBD, for example, which delays the left audio signal (L-R) by a predetermined time on the output side of the subtraction circuit (7), and high-frequency components such as clock pulses used in this BBD. Low-pass filter (24) to remove
and an amplifier (26) through a series circuit of a resistor (25).
Connect the input side of the resistor (25) and the amplifier (26) to the resistor (27) and the resistor (28).
This amplifier (26) is grounded through a series circuit with the resistor (27) and the resistor (28) is connected to the other fixed contact (19c) of the changeover switch (19).
The output side of is connected to the operational amplifier (21) via the resistor (29).
It is connected to the inverting terminal e of the operational amplifier (23) via the resistor (30).
また演算増幅器（２１）の非反転端子のを接地すると共
にこの演算増幅器（２１）の出力側を抵抗器（３１）を
介してこの演算増幅器（２１）の反転端子θに接続し・
この演算増幅器（２１）を加算器を構成する如くし、こ
の演算増幅器（２１）の出力側をボリウム（３２）と増
幅器（９）との直列回路を介して後方左スピーカー（１
１）に接続する。Also, the non-inverting terminal of the operational amplifier (21) is grounded, and the output side of the operational amplifier (21) is connected to the inverting terminal θ of the operational amplifier (21) via the resistor (31).
This operational amplifier (21) constitutes an adder, and the output side of this operational amplifier (21) is connected to the rear left speaker (1) through a series circuit of a volume (32) and an amplifier (9).
Connect to 1).
また演算増幅器（２３）の非反転端子Φを抵抗器（３３
）を介して接地すると共にこの演算増幅器（２３）の出
力側を抵抗器（３４）を介してこの演算増幅Ｗ（２３）
の反転端子ｅに接続しこの演算増幅器（２３）を減算器
を構成する如（し、この演算増幅器（２３）の出力側を
ボリウム（３５）と増幅器（１０）との直列回路を介し
”ζ後方右スピーカー（１２）に接続する。In addition, the non-inverting terminal Φ of the operational amplifier (23) is connected to the resistor (33).
) and ground the output side of this operational amplifier (23) through a resistor (34).
The operational amplifier (23) is connected to the inverting terminal e of the amplifier (23) to constitute a subtracter (and the output side of the operational amplifier (23) is connected to the inverting terminal e of the amplifier (35) and the amplifier (10). Connect to the rear right speaker (12).
この様に構成された本実施例の擬似ステレオ方式では、
後方左スピーカー（１１）には、引算回路（７）によっ
て得られた左音声信号（Ｌ−Ｒ）と遅延回路（＋１によ
って得られたこの左音声信号を所定時間遅延した遅延差
音声信号Δｔ （Ｌ−Ｒ）との加算信号（（Ｌ−Ｒ）
＋Δｔ（Ｌ−Ｒ））が第１のサラウンド信号として供給
され、後方右スピーカー（１２）にはこの遅延差音声信
号Δｔ （Ｌ−Ｒ）とこの左音声信号（Ｌ−Ｒ）との
減算信号（−（Ｌ−Ｒ）＋Δｔ （Ｌゝ−Ｒ））が第２
のサラウンド信号として供給される。In the pseudo stereo system of this embodiment configured in this way,
The rear left speaker (11) receives a left audio signal (LR) obtained by the subtraction circuit (7) and a delayed difference audio signal Δt obtained by delaying the left audio signal obtained by the delay circuit (+1) by a predetermined time. (LR) and addition signal ((LR)
+Δt(L-R)) is supplied as the first surround signal, and the rear right speaker (12) receives a subtraction signal of this delayed difference audio signal Δt(L-R) and this left audio signal (L-R). (-(L-R)+Δt(L-R)) is the second
is supplied as a surround signal.
また切換スイッチ（１９）の可動接点（１９ａ）が一方
の固定接点（Ｌ９ｂ）に接続されるときは、増幅器（１
６）には抵抗器（１５）と抵抗器（１７）で決まるレベ
ルの左音声信号（Ｌ−Ｒ）が供給され、増幅器（２６）
には抵抗器（２５） 、抵抗器（２７）及び抵抗器（２
８）で決まるレベルの遅延差音声信号Δｔ （Ｌ−Ｒ
）が供給され、逆に切換スイッチ（＋９）の可動接点（
１９ａ）が他方の固定接点（１９ｃ）に接続されるとき
は、増幅器（１６）には抵抗器（１５）、抵抗器（１７
）及び抵抗器（１８）により決まるレベルの左音声信号
（Ｌ−Ｒ）が供給され、増幅器（２６）には抵抗器（２
５）及び抵抗器（２７）で決まるレベルの遅延差音声信
号Δｔ （Ｌ−Ｒ）が供給される。Also, when the movable contact (19a) of the changeover switch (19) is connected to one fixed contact (L9b), the amplifier (1
6) is supplied with the left audio signal (L-R) at a level determined by the resistor (15) and resistor (17), and the amplifier (26)
resistor (25), resistor (27) and resistor (2).
8) Delay difference audio signal Δt (L−R
) is supplied, and conversely, the movable contact (
19a) is connected to the other fixed contact (19c), the amplifier (16) has a resistor (15) and a resistor (17).
) and the resistor (18), and the amplifier (26) is supplied with the left audio signal (LR) at a level determined by the resistor (18).
5) and a resistor (27), a delay difference audio signal Δt (L−R) of a level determined by the resistor (27) is supplied.
したがって、本実施例ではスイッチ（１９）の可動接点
（１９ａ）が一方の固定接点（１９ｂ）にあるときは、
左音声信号（Ｌ−Ｒ）よりも遅゛延差音声信号Δｔ （
Ｌ−Ｒ）が強調された音声信号が後方スピーカー（１１
）及び（１２）に供給されるから、後方スピーカー（１
１）及び（１２）により供給される音は拡がりを狭め、
映画再生に最適の音場の拡がり感を得ることができ、逆
にスイッチ（１９）の可動接点（１９ａ）が他の固定接
点（１９ｃ）にあるときは、遅延差音声信号Δｔ （
Ｌ−Ｒ）よりも左音声信号（Ｌ −Ｒ）が強調された音
声信号が後方スピーカー（１１）及び（１２）に供給さ
れるから、後方スピーカー（１１）及び（１２）により
供給される音は拡がりを増し、音楽再生に最適の音場の
拡がり感を得ることができる。しかも本実施例では後方
左スピーカー（１１）より供給される左音声信号（Ｌ−
Ｒ）と後方右スピーカー（１２）より供給される左音声
信号−（Ｌ−Ｒ）とは位相が反転しているから、音楽再
生の場合の音場の拡がり感は同相の左音声信号を後方左
及び右スピーカ−（１１）及び（１２）に供給する場合
に比べ更に増大する。Therefore, in this embodiment, when the movable contact (19a) of the switch (19) is located at one fixed contact (19b),
The delay difference audio signal Δt (
The audio signal with emphasized L-R) is sent to the rear speakers (11
) and (12), so the rear speaker (1
The sound supplied by 1) and (12) narrows the spread,
It is possible to obtain a sense of expansion of the sound field that is optimal for movie playback, and conversely, when the movable contact (19a) of the switch (19) is located at the other fixed contact (19c), the delay difference audio signal Δt (
Since the audio signal in which the left audio signal (L-R) is emphasized more than the left audio signal (L-R) is supplied to the rear speakers (11) and (12), the sound supplied by the rear speakers (11) and (12) This increases the spaciousness, giving you the feeling of expanding the sound field, which is perfect for music playback. Moreover, in this embodiment, the left audio signal (L-
R) and the left audio signal - (L-R) supplied from the rear right speaker (12) are inverted in phase, so the sense of expansion of the sound field during music playback is created by comparing the left audio signal of the same phase to the rear. This is further increased compared to the case where the power is supplied to the left and right speakers (11) and (12).
また本実施例では、切換スイッチ（１９）の可動接点（
１９ａ）が一方の固定接点（１９ｂ）にある場合でも他
方の固定接点（１９ｃ）にある場合でも後方左及び右ス
ピーカ−（１１）及び（１２）より供給される音量は全
体として変化しない。In addition, in this embodiment, the movable contact (
19a) is at one fixed contact (19b) or the other fixed contact (19c), the volume supplied from the rear left and right speakers (11) and (12) does not change as a whole.
この様に本実施例の擬似ステレオ方式では、切換スイッ
チ（１９）を切換えることにより左音声信号（Ｌ−Ｒ）
と遅延差音声信号Δｔ（Ｌ−Ｒ）とのレベルを可変し、
後方左及び右スピーカ−（１１）及び（１２）より供給
される音量を全体として変化させずに、音源に応じた最
適な音場の拡がり感を得ることができた。In this way, in the pseudo-stereo system of this embodiment, by switching the changeover switch (19), the left audio signal (L-R) is
and the delay difference audio signal Δt(LR),
It was possible to obtain an optimal sense of sound field expansion according to the sound source without changing the volume supplied from the rear left and right speakers (11) and (12) as a whole.
また他の実施例として、第２図に示す如く増幅器（１０
）及び増幅器（２６）に供給する左音声信号、（Ｌ−Ｒ
）及び遅延差音声信号Δｔ （Ｌ−Ｒ）をボリウム（３
６）を使用して、可変するものでも良く、この場合には
音場の拡がり感を連続的に変化させることが出来る。In addition, as another embodiment, an amplifier (10
) and the left audio signal supplied to the amplifier (26), (L-R
) and delay difference audio signal Δt (LR) with volume (3
6) may be used to change the sound field, and in this case, the sense of spaciousness of the sound field can be changed continuously.
尚、上述実施例はサラウンド信号として左音声信号りと
右音声信号Ｒとの左音声信号を得る様にしたが、左音声
信号りと右音声信号Ｒとの和信号（Ｌ＋Ｒ）を得ても、
同様の作用効果を得ることが出来ることは容易に理解で
きよう。In the above embodiment, the left audio signal consisting of the left audio signal RI and the right audio signal R is obtained as a surround signal, but even if the sum signal (L+R) of the left audio signal RI and the right audio signal R is obtained. ,
It is easy to understand that similar effects can be obtained.
また本発明は上述実施例に限ることなく、本発明の要旨
を逸脱することなくその他種々の構成を取り得ることは
勿論である。Furthermore, it goes without saying that the present invention is not limited to the above-described embodiments, and can take various other configurations without departing from the gist of the present invention.
本発明に依れば、音場の拡がり感を最適な状態で得るこ
とが出来るようにしたので、映画再生の場合には音場の
拡がり感を減じ、音楽再生の場合には音場の拡がり感を
増大することができる利益がある。According to the present invention, it is possible to obtain a sense of sound field expansion in an optimal state, so that the sense of sound field expansion is reduced in the case of movie playback, and the sound field expansion is reduced in the case of music playback. There are benefits that can increase feelings.
第１図は本発明擬似ステレオ方式の一実施例を示す構成
図、第２図は本発明の他の実施例を示す構成図、第３図
は従来例の擬似ステレオ方式を示すブロック図、第４図
はスピーカーの配置例を示す説明図である。
図中、（１１及び（２）は夫々左及び右音声信号入力端
子、（５）及び（６）は前方左及び右スピーカ−、（７
）は引算回路、（８）は遅延回路、（９）及び（１０）
は夫々後方左及び右スピーカ−、（１５） 、 （１
７） 、 （１８） 。
（２５） 、 （２７）及び（２８）は夫々抵抗器、
（工９）は切換スイッチ、（２１）及び（２３）は夫々
演算増幅器である。FIG. 1 is a block diagram showing an embodiment of the pseudo-stereo system of the present invention, FIG. 2 is a block diagram showing another embodiment of the invention, and FIG. 3 is a block diagram showing a conventional pseudo-stereo system. FIG. 4 is an explanatory diagram showing an example of arrangement of speakers. In the figure, (11 and (2) are left and right audio signal input terminals, (5) and (6) are front left and right speakers, (7) are left and right audio signal input terminals, respectively.
) is a subtraction circuit, (8) is a delay circuit, (9) and (10)
are the rear left and right speakers, (15) and (1
7), (18). (25), (27) and (28) are resistors, respectively.
(9) is a changeover switch, and (21) and (23) are operational amplifiers, respectively.
Claims (1)
夫々混合回路に供給し、該混合回路の出力側に得られる
混合音声信号と該混合音声信号の所定時間遅延した遅延
混合音声信号との加算信号を一方の後方スピーカーに供
給する第１のサラウンド信号とすると共に上記遅延混合
音声信号と上記混合音声信号との減算信号を他方の後方
スピーカーに供給する第２のサラウンド信号とする様に
し、上記混合音声信号又は上記遅延混合音声信号の少な
くとも一方の信号レベルを可変して音場の拡がり感を得
る様にしたことを特徴とする擬似ステレオ方式。The left and right audio signals supplied to the front left and right speakers are respectively supplied to a mixing circuit, and the mixed audio signal obtained at the output side of the mixing circuit is added to a delayed mixed audio signal obtained by delaying the mixed audio signal by a predetermined time. A signal is set as a first surround signal to be supplied to one rear speaker, and a subtracted signal of the delayed mixed audio signal and the mixed audio signal is set as a second surround signal to be supplied to the other rear speaker, and A pseudo-stereo system characterized in that the signal level of at least one of the mixed audio signal or the delayed mixed audio signal is varied to obtain a sense of expansion of the sound field.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60108014A JPS61265999A (en) | 1985-05-20 | 1985-05-20 | Pseudo stereo system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60108014A JPS61265999A (en) | 1985-05-20 | 1985-05-20 | Pseudo stereo system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61265999A true JPS61265999A (en) | 1986-11-25 |
Family
ID=14473798
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60108014A Pending JPS61265999A (en) | 1985-05-20 | 1985-05-20 | Pseudo stereo system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61265999A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004506395A (en) * | 2000-08-14 | 2004-02-26 | バイナウラル スペーシャル サラウンド ピーティワイ リミテッド | Binaural voice recording / playback method and system |
| WO2006057493A1 (en) * | 2004-11-24 | 2006-06-01 | Samsung Electronics Co., Ltd. | Apparatus and method to generate virtual 3d sound using asymmetry and recording medium storing pro gr am to perform the method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4890501A (en) * | 1972-03-01 | 1973-11-26 | ||
| JPS4948962A (en) * | 1972-06-14 | 1974-05-11 |
-
1985
- 1985-05-20 JP JP60108014A patent/JPS61265999A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4890501A (en) * | 1972-03-01 | 1973-11-26 | ||
| JPS4948962A (en) * | 1972-06-14 | 1974-05-11 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004506395A (en) * | 2000-08-14 | 2004-02-26 | バイナウラル スペーシャル サラウンド ピーティワイ リミテッド | Binaural voice recording / playback method and system |
| WO2006057493A1 (en) * | 2004-11-24 | 2006-06-01 | Samsung Electronics Co., Ltd. | Apparatus and method to generate virtual 3d sound using asymmetry and recording medium storing pro gr am to perform the method |
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