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JPH09121400A - Depthwise acoustic reproducing device and stereoscopic acoustic reproducing device - Google Patents

Depthwise acoustic reproducing device and stereoscopic acoustic reproducing device

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JPH09121400A
JPH09121400A JP27584495A JP27584495A JPH09121400A JP H09121400 A JPH09121400 A JP H09121400A JP 27584495 A JP27584495 A JP 27584495A JP 27584495 A JP27584495 A JP 27584495A JP H09121400 A JPH09121400 A JP H09121400A
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sound
delay
system
distance
group
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JP3830997B2 (en )
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Setsu Komiyama
摂 小宮山
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Nippon Hoso Kyokai <Nhk>
日本放送協会
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Abstract

PROBLEM TO BE SOLVED: To enable the distance feeling control of sound image up to the short distance of hearing point.
SOLUTION: Plural speakers 4 to 6 respectively provided with a 1st system 2a for direct sound, 2nd system 2b for indirect sound and two systems of delay elements 7 to 9 and 16 to 18 are distributedly arranged, the delay quantity of a delay element group at the 1st system is set so that acoustic waves outputted from the respective speakers can be focused at a certain position in space as a direct sound, and the delay quantity of a delay element group at the 2nd system is set so that acoustic waves outputted from respective speakers can not be focused as the indirect sound. Then, a sound source signal distributing means 2 is provided for distributing a sound source signal applied from the outside to two outputs at arbitrary level ratio, inputting one part to the delay element group of the 1st system 2a and inputting the other part to the delay element group of the 2nd system 2b and by adjusting the level of the sound source signal between 1st and 2nd systems, distance feeling control for sound image in depthwise direction can be performed from the hearing point to the front side over a wide range from short distance to long distance.
COPYRIGHT: (C)1997,JPO

Description

【発明の詳細な説明】 DETAILED DESCRIPTION OF THE INVENTION

【0001】 [0001]

【発明の属する技術分野】本発明は奥行のある音響の忠実な再生を行う奥行方向音響再生装置と、この奥行方向音響再生装置を左右に備えることによって立体音響の忠実な再生を行う立体音響再生装置に関する。 The present invention relates to the the depth direction sound reproducing apparatus for faithful reproduction of the sound with depth, three-dimensional sound reproduction to perform faithful reproduction of stereophonic sound by providing the depth direction sound reproducing apparatus in the left and right apparatus on.

【0002】[発明の概要]本発明は、複数のスピーカから成るスピーカシステムを用い、聴取位置における直接音が主として増強される直接音増強系統と、主として間接音が増強される間接音増強系統とをそれらの出力信号の加算信号で各スピーカを駆動するように配し、それぞれの系統の入力端子を独立な2信号で駆動し、これらの2信号のレベル比を変化させることによって聴取位置における直接音と間接音との比率を変化させ、音像の距離感を制御する音響再生装置であって、近距離から遠方までの奥行方向の音像の距離感制御を可能にしたものである。 [0002] SUMMARY OF THE INVENTION The present invention uses a loudspeaker system comprising a plurality of speakers, and direct sound enhancement system that direct sound is enhanced mainly at the listening position, and indirect sound enhancement system mainly indirect sound is enhanced the arranged to drive the speakers in the addition signal of these output signals, the input terminals of each strain was driven by two independent signals, directly at the listening position by changing the level ratio of these two signals varying the ratio between the sound and indirect sound, a sound reproducing apparatus which controls the distance perspective of the sound image is obtained by allowing a perceived distance control in the depth direction of the sound image from a short distance to far.

【0003】 [0003]

【従来の技術】従来、音像の距離感を制御する方式として次のようなものが知られている。 Conventionally, as follows is known as a method for controlling the distance perspective of the sound image. その1つは図6に示す構成のもので、2チャンネルステレオを用い、リバーブなどにより音源信号に間接音を付加し、その大小や特性を調節することによって音像の距離感を変化させる方式である。 One is that of the configuration shown in FIG. 6, using a two-channel stereo, adding indirect sound source signal due reverb is the method to change the perceived distance of the sound image by adjusting the magnitude and characteristics . 図6はこの2チャンネルステレオにおける音像距離感制御の片チャンネル分の構成を示しているが、 Although Figure 6 shows the structure of a single channels of sound image perceived distance control in the two-channel stereo,
音源信号入力端子101に入力される音源信号に対して、リバーブを構成する異なる遅延特性を持たせた多数の遅延素子102〜104によって異なる遅延を与え、 Relative excitation signal inputted to the source signal input terminal 101, given different delays by a number of delay elements 102 to 104 which gave different delay characteristics constituting the reverberation,
これらを加算器105において元の音源信号に加算し、 It was added to the original sound source signal in these adders 105,
増幅器106で増幅してスピーカ107から出力する構成である。 Is configured to output from the speaker 107 is amplified by the amplifier 106. そして左右のチャンネルの遅延はさらに異なる値を使用している。 The delay of the left and right channels are using more different values.

【0004】また他の従来例として、スピーカアレイを用いた立体音響再生装置が特開平3−159500号公報に提案されている。 [0004] As another conventional example, the stereophonic sound reproduction device has been proposed in JP-A-3-159500 using a speaker array. これは図7に示す構成であって、 This is a structure shown in FIG. 7,
多数のスピーカ111〜113で構成されるスピーカアレイと多数の焦点合成用遅延素子114〜116とにより空間のある位置に音波の焦点を結ばせ、その場所の音圧を局所的に上昇させることによって仮想音源を合成し、その場所に音像を知覚させるようにしたものである。 It was focused sound waves in a certain position space by the configured speaker array and a number of focus stacking delay elements 114-116 in a number of loudspeakers 111 to 113, by locally increasing the sound pressure of the location a virtual sound source and synthesis, in which so as to perceive the sound image in its place. そして遅延量制御部117によって各遅延素子11 And each delay element by a delay amount control unit 117 11
4〜116の遅延量を変化させ、焦点の位置を移動させることによって奥行方向も含めた音像の位置を制御する。 Changing the delay amount of 4-116, and controls the position in the depth direction, including the sound image by moving the position of the focal point. なお、118〜120は各スピーカ111〜113 In addition, 118 to 120 each speaker 111 to 113
を駆動する増幅器である。 Which is the amplifier driving.

【0005】これらに加えて、さらに頭部伝達関数を模擬する方式や左右逆位相の音が頭内に定位することを利用する方式も提案されているが、実用化されたものはない。 In addition to these, although more sound system or the left and right opposite phase to simulate head related transfer function has been proposed also a system that makes use of the fact that localized in the head, none has been put to practical use.

【0006】 [0006]

【発明が解決しようとする課題】上記の図6に示した従来の音響再生装置の場合、スピーカ107よりも手前、 For THE INVENTION Problems to be Solved] Conventional sound reproducing apparatus shown in FIG. 6 above, short of the speaker 107,
つまり聴取者側に音像を定位させることが困難である。 That it is difficult to localize a sound image to the listener side.
その理由は音源信号に間接音を付加しない場合にも、聴取する部屋の壁面で音波が反射することによって間接音が付加されるためである。 The reason is when not adding the indirect sound source signal also is because indirect sound is added by reflecting sound waves at the wall of the room to listen. この間接音は部屋、スピーカ配置、聴取位置を固定した上で、部屋の応答の逆特性を音源信号に畳込めば理論的には除去することができるが、現実的ではない。 The indirect sound room, speaker placement, after fixing the listening position, but the inverse characteristic of the response of the room in theory be put tatami the sound source signal can be removed, not realistic.

【0007】これに加えて、図6に示した2チャンネルステレオ方式の場合、多数の遅延素子102〜104で構成されるリバーブなどにより音源信号そのものに付加される間接音の音色は聴取する部屋で付加される間接音の音色と異なるものであるため、間接音の量により音色が変化し、不自然な音に感じられる問題点もあった。 [0007] In addition, in the case of two-channel stereo system shown in FIG. 6, the tone of indirect sound to be added to the sound source signal itself and the like composed reverb number of delay elements 102-104 in a room listening because the tone of the added is indirect sound is different, tone is changed by the amount of indirect sound, there is a problem that is felt unnatural sound.

【0008】また図7に示した従来の立体音響再生装置の場合、多数のスピーカ111〜113で構成されるスピーカアレイの音波の焦点近傍で直接音の比率が単一スピーカに比べて高くなるので、焦点を聴取者の近傍に合成すれば音像をスピーカアレイよりも手前側に定位させることができ、間接音も部屋で付加されるものであるので音色が自然である特長がある。 [0008] In the case of a conventional stereophonic sound reproducing apparatus shown in FIG. 7, since the ratio of direct sound near the focal point of a sound wave consisting speaker array of a number of loudspeakers 111 to 113 is higher than the single speaker , the focus can be localized in front of the listener speaker array sound image be synthesized in the vicinity of the, there is a feature tone is natural since the indirect sound is also intended to be added in the room.

【0009】しかしながら、このスピーカアレイによる方式では音波の焦点を移動させるためにきわめて多数の遅延素子114〜116の遅延量を実時間で変化させなければならず、そのために音声の記録、伝送にきわめて多数のチャンネルを必要とする問題点がある。 However, it is necessary to change in real time the amount of delay of a very large number of delay elements 114 to 116 to move the focus of the sound wave in a manner according to the speaker array, recording the speech for its very transmission there is a problem that requires a large number of channels.

【0010】また図7に示した構成ではわずかに1つの音像の位置を制御することができるにすぎず、複数の音像の距離感を制御するためには各音源に独立な遅延量を与え、それぞれに焦点を作る必要があるので、音像の数に比例して必要な遅延素子の数が増大してしまい、加えて、それぞれの遅延素子の出力から成る多チャンネル信号同士を加算する特殊な回路を必要とし、システムがきわめて複雑化する問題点がある。 [0010] only can slightly control the position of one of the sound image in the configuration shown in FIG. 7, in order to control the distance perspective of a plurality of sound gives independent delay amount for each sound source, since each is necessary to make the focal point, the number of required delay elements in proportion to the number of sound image ends up increasing, in addition, special circuit for adding the multi-channel signals respectively and an output of the respective delay elements the need, there is a problem in that the system is very complicated.

【0011】本発明はこのような従来の問題点に鑑みてなされたもので、スピーカアレイシステムを用いて、しかも少ない数のチャンネルの音声と遅延量一定の遅延素子とで複数の音像をスピーカよりも手前側に知覚させ、 [0011] The present invention has been made in view of such conventional problems, using a speaker array system, yet the speaker multiple sound images at less the number of channels of the audio delay amount fixed delay element also to be perceived on the front side,
かつ移動させることができる奥行方向音響再生装置及び立体音響再生装置を提供することを目的とする。 And an object thereof to provide a depth direction sound reproducing apparatus can be moved and stereophonic sound reproduction device.

【0012】 [0012]

【課題を解決するための手段】請求項1の発明の奥行方向音響再生装置は、それぞれ直接音用の第1系統と間接音用の第2系統との2系統の遅延素子を備えた複数のスピーカを分散配置し、前記第1系統の遅延素子群の遅延量を前記スピーカ各々の出力する音波が直接音として空間のある位置に焦点を結ぶように設定し、前記第2系統の遅延素子群の遅延量を前記スピーカ各々の出力する音波が間接音として焦点を結ばないように設定し、外部から与えられる音源信号を任意のレベル比の2出力に配分し、その一方を前記第1系統の遅延素子群に入力し、他方を前記第2系統の遅延素子群に入力する音源信号配分手段を設けたものである。 [Summary of] the depth direction sound reproducing apparatus of the invention of claim 1, a plurality of which includes a delay element of two systems of the first system and a second system for indirect sounds for the direct sound, respectively the speaker was distributed, the sound waves the amount of delay of the delay element group of the first system to the output of the speaker, each set to focus on a certain position space as a direct sound, the delay element group of the second system waves and delay outputs of the speaker, each set not focused as indirect sound, allocate excitation signal given from the outside to the second output of any level ratio of the first system that one input to the delay element group is the other one provided with a sound source signal distribution means for inputting to the delay element group of the second system.

【0013】この請求項1の発明の奥行方向音響再生装置では、第1系統に配分される音源信号は第1系統の遅延素子群とスピーカを介して音波として空間に放出され、ある位置、つまり焦点位置にほぼ同時に到達し、その周辺の音場における直接音のエネルギ比を高め、結果的に音像をスピーカよりも手前の近距離に定位させることができる。 [0013] In the depth direction sound reproducing apparatus of the invention of this first aspect, the sound source signals to be distributed to the first system is released in the space as a sound wave via a delay element group and the speaker of the first system, a location, that is substantially simultaneously reach the focal point, increasing the energy ratio of the direct sound in the sound field around them, resulting in a sound image can be localized at a short distance from the front of the speaker. これに対して第2系統に配分される音源信号は第2系統の遅延素子群とスピーカを介して空間に焦点を結ぶことのない音波として放出され、前記焦点近傍の間接音を主に増強する。 Sound source signal to be allocated to the second system with respect to this will be released as sound waves never focused on the space through the delay element group and the speaker of the second system, mainly enhancing the indirect sound of the focal point .

【0014】一般に音像の距離感はもっぱら直接音と間接音とのエネルギ比に依存することが知られているが、 [0014] The general sense of distance of the sound image is known to be dependent on the energy ratio of the exclusively direct sound and indirect sound,
上記の第1系統に配分される音源信号のレベルを高くすれば焦点近傍で直接音の比率が高まり、音像が聴取者にとって近距離に知覚されることになり、逆に第2系統に配分される音源信号のレベルを高くすれば間接音の比率が高まり、音像は焦点からスピーカ側に後退し、聴取者にとって音像が遠ざかっているように知覚される。 Increased the proportion of direct sound near the focal point if higher levels of the sound source signals to be distributed to the first system described above, the sound image is to be perceived at a short distance to the listener, is allocated to the second system in the opposite the ratio of indirect sound is increased if higher levels of the sound source signals that sound image is set back from the focal point to the speaker side is perceived as a sound image is moving away to the listener.

【0015】そこで、音源信号配分手段によって第1系統と第2系統に対する音源信号のレベル配分を調節することによって聴取者にとって焦点位置から前方の任意の位置に音像があるように知覚させることができ、奥行方向の近距離から遠方までの音像の距離感制御ができる。 [0015] Therefore, it is possible to perceive that the there is a sound image at a given position of the front from the focal point for the listener by controlling the level distribution of the source signal for the first system and the second system by means of the sound source signal distribution means It can sense of distance control of the sound image from short range in the depth direction to a distance.

【0016】また音像の距離感は焦点の位置によるのではなく、第1系統、第2系統それぞれの遅延素子群の遅延量を固定しておき、音源信号配分手段により第1系統と第2系統に対する音源信号のレベル配分を調節することによって行うので、音源ごとに2つの系統のレベル配分比に差を付けることによりそれぞれ異なる距離に音像が定位させることができ、複数の音源を容易に合成することができる。 [0016] perceived distance of the sound image rather than by the position of the focal point, the first system in advance by fixing the delay amount of the second system each delay element group, the first system and the second system by the sound source signal distribution means is performed by adjusting the level distribution of the source signal for each different distances by putting a difference in level distribution ratio of the two lines for each sound source can sound image localizing, readily synthesize a plurality of sound sources be able to.

【0017】請求項2の発明の奥行方向音響再生装置は、聴取方向に大きな指向利得を有する直接音用の第1 The depth direction sound reproducing apparatus of a second invention, first a direct sound having a large directivity gain listening direction
のスピーカと、前記第1のスピーカと共に配置され、前記聴取方向に最大指向利得を有しない間接音用の第2のスピーカと、外部から与えられる音源信号を任意のレベル比の2出力に配分する音源信号配分手段とを備え、前記音源信号配分手段の一方の出力で前記第1のスピーカを駆動し、他方の出力で前記第2のスピーカを駆動するようにしたものである。 And a speaker, is disposed together with the first speaker, to distribute the second speaker for the indirect sounds having no maximum directivity gain listening direction, a sound source signal given from the outside to the second output of any level ratio and a sound source signal distribution means, said driving the first speaker at one output of the sound source signal distribution means, in which so as to drive the second speaker at the other output.

【0018】この請求項2の発明の奥行方向音響再生装置では、第1のスピーカから出力される音波が直接聴取者に前方から到達し、これと共に第2のスピーカから出力される音波が部屋における反射音となって、つまり間接音となって聴取者の位置に到達する。 [0018] in this depth direction sound reproducing apparatus of the invention of claim 2, sound waves acoustic waves output from the first speaker reaches from the front directly the listener, is outputted from the second speaker with which the accommodation as reflected sound arrives at the listener's position i.e. become indirect sound. したがって音源信号配分手段によって第1のスピーカと第2のスピーカに配分する音源レベル比を任意に調節することによって、聴取者にとって聴取位置からスピーカに向う奥行方向の任意の位置に音像があるものと知覚させることができる。 By adjusting arbitrarily the sound level ratio to be distributed to the first speaker and the second speaker by thus excitation signal distribution means, and that there is sound from the listening position for the listener at an arbitrary position in the depth direction toward the speaker it can be perceived. そしてこの場合、間接音として部屋で発生する反射音を利用するので、自然の音色を保ったまま音像の距離感制御を行うことができる。 And in this case, because it utilizes the reflected sounds generated in the room as indirect sound, it is possible to perform the sense of distance control of the sound image while maintaining the natural sound.

【0019】請求項3の発明の立体音響再生装置は、請求項1又は2の奥行方向音響再生装置を左右に備え、それぞれの奥行方向音響再生装置の音源信号入力端子に左側、右側それぞれ対応する側の音源信号を入力するようにしたものである。 The stereophonic sound reproducing apparatus of the invention of claim 3 is provided with a depth direction sound reproducing apparatus according to claim 1 or 2 in the left and right, the left, respectively right corresponding to the sound source signal input terminal of each of the depth direction sound reproducing apparatus it is obtained so as to input the source signal side.

【0020】この請求項3の発明の立体音響再生装置では、第1又は第2の奥行方向音響再生装置を利用することによって左右それぞれの音源について、音像の奥行方向の近距離から遠方までの距離感制御ができ、しかも左右の音源の強弱によって左右方向の距離感制御もでき、 [0020] In the three-dimensional sound reproduction device of the invention of this claim 3, the distance for each sound source left and right by using the first or second depth direction sound reproduction device, from a short in the depth direction of the sound image to the far it is sensitive control, yet can also sense of distance control of the left and right direction by the strength of the left and right of the sound source,
立体的な音像の距離感制御が可能となる。 It is possible to sense of distance control of a three-dimensional sound image.

【0021】また、容易に類推されるようにさらに多くの奥行方向音響再生装置を利用すれば、サラウンド等の後方の音像の距離感制御が可能となる。 Further, by using the more the depth direction sound reproducing device as easily inferred, it is possible to sense of distance control of the rear of the sound image of the surround and the like.

【0022】 [0022]

【発明の実施の形態】以下、本発明の実施の形態を図に基づいて詳説する。 BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, detailed embodiments of the present invention based on FIG. 図1は請求項1の発明のスピーカアレイを用いた奥行方向音響再生装置の実施の形態を示している。 Figure 1 shows an embodiment of a depth direction sound reproducing apparatus using a speaker array of the invention of claim 1. この発明の奥行方向音響再生装置は、1つの音源信号入力端子1に入力される音源信号を任意のレベル比の2系統の音源信号に配分するために可変抵抗器2を備えていて、この可変抵抗器2の抵抗調節によって直接音系統2aと間接音系統2bとに音源信号を所定のレベル比で配分するようにしている。 Depth direction sound reproducing apparatus of the present invention is provided with a variable resistor 2 in order to distribute the sound source signal input to one source signal input terminal 1 to the excitation signal of the two systems of any level ratio, the variable It is to be distributed to the direct sound system 2a and indirect sound system 2b the sound source signal at a predetermined level ratio by the resistance adjustment of the resistor 2. スピーカアレイ3は多数のスピーカ4〜6によって構成されている。 Speaker array 3 is constituted by a number of speakers 4-6.

【0023】直接音系統2a側にはスピーカアレイが出力する音波が空間のある位置において焦点を結ぶようにスピーカ4〜6それぞれの出力に適切な遅延をかけるために焦点用遅延素子7〜9がスピーカ4〜6の数だけ並列に備えられており、各焦点用遅延素子7〜9の出力側に加算器10〜12と増幅器13〜15それぞれが接続されており、各増幅器13〜15の出力側がスピーカ4 The sound wave speaker array to direct sound system 2a side is outputted focus delay elements 7-9 to make an appropriate delay to the speaker 4-6 each output so as to focus at a certain position space the number of speakers 4-6 is provided with parallel, and the adders 10 to 12 and the amplifier 13 to 15 is connected to the output side of each focus delay elements 7-9, the output of each amplifier 13-15 the side speaker 4
〜6それぞれに接続されている。 6 are connected to the.

【0024】間接音系統2b側には同じくスピーカアレイを構成するスピーカ4〜6の数だけの非焦点用遅延素子16〜18が並列に備えられており、これらの出力側は加算器10〜12それぞれに接続されていて、焦点用遅延素子7〜9の出力それぞれと加算されて増幅器13 The indirect sound unfocused delay elements 16 to 18 as many of the speakers 4-6 to also constitute a speaker array to the grid 2b side are provided in parallel, these output-side adder 10-12 be connected to each, it is added to the respective outputs of the focus delay element 7-9 amplifier 13
〜15それぞれに入力されるようになっている。 15 are inputted respectively. これらの非焦点用遅延素子16〜18それぞれの遅延量は、間接音系統2b側の音源信号が増幅されてスピーカ3〜5 Delay amount of each of these non-focal delay elements 16 to 18, the sound source signal of the indirect sound system 2b side is amplified speaker 3-5
から出力されるときにどこにも焦点を結ばないような設定にしてある。 Nowhere it is to set so as not focused when it is output from.

【0025】なお、以下の説明の便宜のために遅延素子7〜9、加算器10〜12、増幅器13〜15及び遅延素子16〜18を含む全体を電気系統19と総称する。 [0025] Note that the delay elements 7-9 for convenience of the following description, the adder 10 to 12, collectively referred to as the electrical system 19 across including amplifiers 13-15 and delay elements 16-18.

【0026】次に、上記構成の奥行方向音響再生装置の動作について説明する。 Next, the operation of the depth direction sound reproduction device configured as described above. 焦点用遅延素子7〜9それぞれの遅延量を各スピーカ3〜5から出力される音波の焦点が聴取者の目の前に合成される設定にする。 The delay element 7-9 each delay amount for focus settings the focus of acoustic waves output from the speaker 3-5 is synthesized in front of the listener. 他方、非焦点用遅延素子16〜18それぞれの遅延量はスピーカ3 On the other hand, the respective non-focus delay elements 16 to 18 delay the speaker 3
〜5から出力される音波が空間のどこにも焦点を合成しないようにランダムな値に設定する。 Acoustic waves output from 5 to set to a random value so as not to synthesize where the focal point is also the space. また音源信号入力端子1に入力される音源信号を可変抵抗器2の抵抗値の調整によって直線音系統2aと間接音系統2bとに所望のレベル差を持たせて配分する。 Also distributed to have a desired level difference in the linear sound system 2a and indirect sound system 2b sound source signal input to the source signal input terminal 1 by adjusting the resistance value of the variable resistor 2.

【0027】そこで、音源信号入力端子1に入力される音源信号は、可変抵抗器2によって所定のレベル差を持って直接音系統2aの各焦点用遅延素子7〜9と間接音系統2bの各非焦点用遅延素子16〜18に配分される。 [0027] Therefore, the sound source signal input to the source signal input terminal 1, each of the focus delay elements 7-9 and the indirect sound system 2b of the direct sound system 2a with a predetermined level difference by the variable resistor 2 It is allocated to the non-focal delay elements 16-18.
直接音系統2aでは各焦点用遅延素子7〜9によって所定の遅延がかけられ、スピーカ3〜5から出力される音波は所定の空間位置に焦点を結ぶ直接音になり、間接音系統2bでは各非焦点用遅延素子16〜18によってランダムな遅延がかけられ、スピーカ3〜5から出力される音波はどこにも焦点を結ばない間接音になる。 Directly by the sound system 2a in the delay elements 7-9 for each focus predetermined delay applied, acoustic waves output from the speaker 3-5 becomes direct sound focused in a predetermined spatial position, the indirect sound system 2b each random delay is multiplied by the non-focal delay elements 16-18, the indirect sound waves do not focused anywhere on the output from the speaker 3-5. そしてこれらの直接音と間接音との強さの比率は可変抵抗器2 The intensity ratio of these direct sound and indirect sound variable resistor 2
による直接音系統2aと間接音系統2bとの間のレベル差によって変化する。 It varies with the level difference between the direct sound system 2a and indirect sound system 2b by.

【0028】いま直接音系統2a側のレベルが高ければ焦点合成に寄与する音波が主力となり、焦点近傍で聴取すれば直接音が優勢となり、聴感上は音像が聴取者の近距離に知覚されることになる。 [0028] Now direct the higher the sound system 2a side of the level focus contributes wave synthesis is the main force, direct sound is dominant when listening near the focal point, audibility is sound image is perceived at a short distance from the listener It will be. これとは反対に、間接音系統2b側のレベルが高ければ焦点位置での直接音の音圧は低くなり、間接音が優勢になって聴感上、音像が聴取者から遠方に知覚されることになる。 On the contrary, the higher the indirect sound system 2b of the level sound pressure of direct sound at the focal position is lowered, the indirect sound audibility becomes dominant, the sound image is perceived in the distance from the listener become.

【0029】したがって可変抵抗器2によって直接音系統2aと間接音系統2bとのレベル差を調節することによって、聴感上、音像を聴取者の近距離から遠方まで任意の位置に制御することができる。 [0029] Thus by adjusting the level difference between the direct sound system 2a and indirect sound system 2b by the variable resistor 2, can be controlled to an arbitrary position on the hearing, the sound image from the short distance of the listener to the far .

【0030】またこの実施の形態の奥行方向音響再生装置を図6に示した従来の2チャンネルステレオ方式の音響再生装置と比較すると、従来の方式では直接音を再生する経路に遅延素子が設けられていないためにこの図6 Further when compared with the audio player according to the conventional two-channel stereo system shown in the depth direction sound reproducing apparatus of this embodiment in FIG. 6, the delay element is provided in a path to reproduce the direct sound in the conventional manner this figures to be not 6
の構成の回路を複数用いたとしても直接音と間接音とのエネルギ比は1つの回路の場合と変らないのに対して、 The energy ratio between the even direct sound and indirect sound as using a plurality of circuits of the configuration with respect to the unchanged to the case of one circuit,
本実施の形態の場合にはスピーカ数を増やすことによって直接音のエネルギ比を増加させることができて音像をより近距離に知覚させることができるようになる。 In the case of this embodiment it is possible to perceive the sound image can be increased energy ratio of the direct sound by increasing the number of speakers and more at a short distance.

【0031】次に請求項3の発明の立体音響再生装置の1つの実施の形態を図2に基づいて説明する。 [0031] Next will be described with reference to one embodiment of the three-dimensional sound reproduction apparatus of the invention of claim 3 in FIG. この実施の形態の立体音響再生装置は、図1に示した奥行方向音響再生装置を左右に配して右側音源信号を右側音源信号入力端子1R、左側音源信号を左側音源信号入力端子1 Stereophonic sound reproduction apparatus of this embodiment, the depth direction sound reproducing apparatus to the right sound signal to the right sound signal by disposing the left and right input terminals 1R, the left sound signal left sound source signal input terminal 1 shown in FIG. 1
Lに入力して再生することにより、奥行方向の音像位置の制御と共に左右方向の音像位置の制御を行うものである。 By performing the reproduction on the input to the L, and performs control of the sound image position in the horizontal direction along with the control of the sound image position in the depth direction.

【0032】聴取者20の目の前の位置に左右のスピーカアレイ3R,3Lそれぞれから出力される直接音の音波が共に焦点を結ぶように各スピーカアレイ3R,3L The listener 20 eyes in front of the left and right speaker array 3R at a position, the speaker so as to connect the sound wave are both focused direct sound output from each 3L array 3R, 3L
の向きを調整してある。 It is to adjust the orientation.

【0033】この立体音響再生装置では、左右の可変抵抗器2R,2Lを調整することによって各直接音系統2 [0033] In this three-dimensional sound reproduction apparatus, the variable resistance of the left and right units 2R, each directly by adjusting the 2L sound system 2
Ra,2Laと各間接音系統2Rb,2Lbとの間のレベル配分比を調節することによって奥行方向の音像の距離感制御を行い、左右の音源信号入力端子1R,1Lに入力する音源信号のレベル差の調整によって左右方向の音像位置の制御を行うことができる。 Ra, 2La each indirect sound systems 2Rb, perform sound image perceived distance control of the depth direction by adjusting the level distribution ratio between 2Lb, level of the sound source signal input left and right sound source signal input terminals 1R, to 1L by adjusting the difference can be controlled sound image position in the horizontal direction.

【0034】次に、請求項2の発明の奥行方向音響再生装置の実施の形態を図3に基づいて説明する。 Next, a description will be based on the embodiment of the depth direction sound reproducing apparatus of the invention of claim 2 in FIG. この実施の形態の奥行方向音響再生装置は、図1に示した多数のスピーカ4〜6によるスピーカアレイ3に代えて、聴取位置の方向に最大指向利得を有する直接音用スピーカ2 Depth direction sound reproducing apparatus of this embodiment, instead of the speaker array 3 by many speakers 4-6 shown in FIG. 1, a speaker for direct sound having a maximum directivity gain in the direction of the listening position 2
1と、聴取位置の方向の指向利得が小さい、すなわち聴取方向と直交する方向に最大指向利得を有する間接音用スピーカ22とを近接して配置し、それぞれのスピーカ21,22に対して増幅器23,24を介して直接音系統2a,間接音系統2bの音源信号を入力する構成としたものである。 1, small directivity gain of the listening position, i.e. in close proximity to the indirect sound speaker 22 having the maximum directivity gain in the direction perpendicular to the listening direction is arranged, the amplifier 23 for each of the speakers 21 and 22 is obtained by a structure in which the input direct sound system 2a through 24, a sound source signal of the indirect sound system 2b.

【0035】なお、間接音用スピーカ22は背中合せに配置した同種のスピーカ22a,22bを逆位相に接続した構造で、聴取位置の方向にヌルを持つ双指向性を有するものである。 [0035] Incidentally, the indirect sound speaker 22 is a structure in which connection the same kind of speaker 22a disposed back to back, and 22b in opposite phases, and has a bidirectional with a null in the direction of the listening position.

【0036】この実施の形態の奥行方向音響再生装置では、可変抵抗器2の調節によって直接音系統2a側のレベルを高くすることにより、直接音用スピーカ21による直接音が優勢となり、聴取者に対して近くに音像を知覚させ、逆に間接音系統2b側のレベルを高くすることにより、間接音用スピーカ22からの音波が部屋の壁に反射してから聴取位置に到達する間接音が優勢となり、 [0036] In the depth direction sound reproducing apparatus of this embodiment, by increasing the level of the direct sound system 2a side by adjustment of the variable resistor 2, it becomes superior sound directly by a direct sound speaker 21, a listener near to perceive a sound image for, by increasing the level of the indirect sound system 2b side Conversely, dominant indirect sound waves from the indirect sound speaker 22 reaches the listening position from the reflection on the wall of the room next,
聴取者に対して音像を遠くに知覚させることができる。 It can be perceived in the distance the sound image for the listener.

【0037】次に、請求項2の発明の奥行方向音響再生装置の他の実施の形態を図4に基づいて説明する。 Next, it will be described with reference to another embodiment of the depth direction sound reproducing apparatus of the invention of claim 2 in FIG. この実施の形態の奥行方向音響再生装置は、図3に示した間接音用スピーカ22に代えて、無指向性スピーカ25を配置し、間接音系統2bの音源信号を入力する構成としたものである。 Depth direction sound reproducing apparatus of this embodiment, in place of the indirect sound speaker 22 shown in FIG. 3, arranged omnidirectional speaker 25, which has a configuration for inputting a sound signal of the indirect sound system 2b is there.

【0038】この実施の形態の奥行方向音響再生装置では、間接音系統22bのレベルを最大、直接音系統22 [0038] In the depth direction sound reproducing apparatus of this embodiment, the maximum level of the indirect sound system 22b, direct sound system 22
aのレベルを最小とした場合に、音像が最も遠くに知覚される。 When the minimum level of a, a sound image is perceived farthest. 無指向性スピーカ25からの音波には聴取位置に直接到達する成分が若干含まれるため、この実施の形態では音像の遠方方向の制御範囲に制限があるが、構成が最も単純である。 Since the wave from omnidirectional speaker 25 includes some components that directly reaches the listening position, but in this embodiment there is a limit to distal direction of the control range of the sound image, the configuration is the simplest.

【0039】次に、請求項2の発明の奥行方向音響再生装置のさらに他の実施の形態を図5に基づいて説明する。 Next, it will be described with reference to FIG. 5 a further embodiment of the depth direction sound reproducing apparatus of the invention of claim 2. この実施の形態の奥行方向音響再生装置は、図3に示した間接音用スピーカ22に代えて、聴取位置の方向以外の方向に最大指向利得を有する間接音用スピーカ2 Depth direction sound reproducing apparatus of this embodiment, in place of the indirect sound speaker 22 shown in FIG. 3, the indirect sound speaker 2 with a maximum directivity gain in directions other than the direction of the listening position
6を配置し、間接音系統2bの音源信号を入力する構成としたものである。 6 is arranged, in which a configuration for inputting a sound signal of the indirect sound system 2b. 実際の最大指向利得の方向は間接音用スピーカ26のみで再生した場合に音像が最も遠方に知覚されるよう調節することで決定することができる。 Direction of actual maximum directional gain can be determined by adjusting such that a sound image is perceived farthest in case of reproducing only the indirect sound speaker 26.
動作原理は図3の実施形態と同様である。 The operating principle is similar to the embodiment of FIG.

【0040】なお、図3〜図5に示した奥行方向音響再生装置を2つ用いて図2に示したように左右に配置することにより、奥行方向と共に左右方向の音像位置制御ができる立体音響再生装置を構成することができる。 [0040] By placing the left and right as shown in FIG. 2 by using two of the depth direction sound reproducing apparatus shown in FIGS. 3 to 5, three-dimensional sound can sound image position control in the lateral direction with a depth direction it is possible to configure the playback apparatus.

【0041】 [0041]

【発明の効果】以上のように請求項1の発明によれば、 According to the present invention as described above, according to the present invention,
聴取位置に直接音の焦点を設定し、間接音との音圧のエネルギ比の大小調節によって奥行方向の距離感を制御するので、聴取者の近距離から遠方まで奥行方向の音像の距離感制御ができる。 Set the focus of the direct sound to the listening position, and controls the distance perspective in the depth direction by the magnitude adjustment of the energy ratio of the sound pressure of the indirect sound, the distance feeling control of the sound image in the depth direction from close range of the listener to the far can.

【0042】また1組のスピーカアレイによる音像の距離感制御に直接音を主に増強する第1系統と間接音を主に増強する第2系統との2チャンネルで行うので、従来のようにスピーカアレイを構成するスピーカの数だけチャンネルを必要とすることがなく、チャンネル数を格段に減少させることができる。 Further it is performed in two channels of the second system for primarily enhance the first system and the indirect sound that mainly enhances direct sound to a set of speaker array sound image perceived distance control by, as in the conventional speaker without requiring a channel by the number of speakers constituting the array, the number of channels can be significantly reduced.

【0043】また第1系統と第2系統との音源信号のレベル配分比の調節によって音像の距離感制御を行うので、従来のスピーカアレイを用いた音像の距離感制御のように音像ごとに異なる遅延量を遅延素子に設定する必要があって遅延素子の数が膨大になるということがなく、音像の数によらず遅延素子の数が一定でよく、さらに従来のように音像の距離感制御のために各遅延素子の遅延量を可変とする必要がなく、各系統に用いられている遅延素子の遅延量は固定でよくて、回路構成をきわめて単純化することができる。 [0043] Also since the sense of distance control of the sound image by adjusting the level distribution ratio of the sound source signal of the first system and the second system, different for each sound image as perceived distance control of the sound image using a conventional speaker array without that the number of delay elements is necessary to set the delay amount in the delay element becomes enormous, often the number of delay elements regardless of the number of sound image is constant, further perceived distance control of the sound image as in the prior art there is no need to vary the delay amount of each delay element for a delay amount of the delay element used in each system is well fixed, it is possible to extremely simplify the circuit configuration.

【0044】請求項2の発明によれば、請求項1の発明と同じように、聴取方向に大きな指向利得を有する第1 [0044] According to the invention of claim 2, like the invention of claim 1, the first having a large directivity gain listening direction
のスピーカとそれに直交する方向に大きな指向利得を有する第2のスピーカとのそれぞれの系統の音源信号のレベル配分比の調節によって音像の距離感制御を行うので遅延素子を必要とせず、回路構成をきわめて単純化することができる。 The speaker and since the perceived distance control of the sound image by adjusting the level distribution ratio of the sound source signals of the system of the second speaker having a large directivity gain in the direction perpendicular thereto without requiring a delay element, the circuit configuration it can be extremely simplified.

【0045】請求項3の発明によれば、奥行方向の距離感制御と共に左右方向の距離感制御ができ、音像の立体的な距離感制御ができる。 [0045] According to the invention of claim 3, together with the depth direction of the sense of distance control can sense of distance control in the lateral direction, it is three-dimensional sense of distance control of the sound image.

【図面の簡単な説明】 BRIEF DESCRIPTION OF THE DRAWINGS

【図1】本発明の奥行方向音響再生装置の1つの実施の形態の回路ブロック図。 A circuit block diagram of one embodiment of a depth direction sound reproducing apparatus of the present invention; FIG.

【図2】本発明の立体音響再生装置の1つの実施の形態の回路ブロック図。 Figure 2 is a circuit block diagram of one embodiment of a stereophonic sound reproduction apparatus of the present invention.

【図3】本発明の奥行方向音響再生装置の他の実施の形態の回路ブロック図。 Figure 3 is a circuit block diagram of another embodiment of the depth direction sound reproducing apparatus of the present invention.

【図4】本発明の奥行方向音響再生装置のさらに他の実施の形態の回路ブロック図。 Further circuit block diagram of another embodiment of the depth direction sound reproducing apparatus of the present invention; FIG.

【図5】本発明の奥行方向音響再生装置のさらに他の実施の形態の回路ブロック図。 [5] In addition circuit block diagram of another embodiment of the depth direction sound reproducing apparatus of the present invention.

【図6】従来例の回路ブロック図。 Figure 6 is a circuit block diagram of a conventional example.

【図7】他の従来例の回路ブロック図。 Figure 7 is a circuit block diagram of another conventional example.

【符号の説明】 DESCRIPTION OF SYMBOLS

1 入力端子 2 可変抵抗器 2a 直接音系統 2b 間接音系統 3 スピーカアレイ 4〜6 スピーカ 7〜9 焦点用遅延素子 10〜12 加算器 13〜15 増幅器 16〜 18 遅延素子 19 電気系統 20 聴取者 21,22 スピーカ 23,24 増幅器 25,26 スピーカ 1 input terminal 2 variable resistor 2a direct sound system 2b indirect sound system 3 speaker array 4-6 speaker 7-9 focal delay elements 10 to 12 adders 13-15 amplifiers 16-18 delay element 19 the electrical system 20 listener 21 , 22 speakers 23 and 24 amplifier 25, 26 speaker

Claims (3)

    【特許請求の範囲】 [The claims]
  1. 【請求項1】 それぞれ直接音用の第1系統と間接音用の第2系統との2系統の遅延素子を備えた複数のスピーカを分散配置し、 前記第1系統の遅延素子群の遅延量を前記スピーカ各々の出力する音波が直接音として空間のある位置に焦点を結ぶように設定し、 前記第2系統の遅延素子群の遅延量を前記スピーカ各々の出力する音波が間接音として焦点を結ばないように設定し、 外部から与えられる音源信号を任意のレベル比の2出力に配分し、その一方を前記第1系統の遅延素子群に入力し、他方を前記第2系統の遅延素子群に入力する音源信号配分手段を設けて成る奥行方向音響再生装置。 1. A respectively distributed a plurality of speakers having a delay element of two systems of the first system and a second system for indirect sounds for the direct sound, the delay amount of the delay element group of the first system the sound wave output from the speaker, each set to focus on a certain position space as a direct sound and an output sound wave delay amount the speaker each of the delay element group of the second system is the focus as indirect sound set not tied, allocate excitation signal supplied from the outside to the second output of any level ratio, and inputs the one delay element group of the first system, while the delay element group of the second system depth direction sound reproducing apparatus comprising providing an excitation signal distribution means for inputting a.
  2. 【請求項2】 聴取方向に大きな指向利得を有する直接音用の第1のスピーカと、 前記第1のスピーカと共に配置され、前記聴取方向に最大指向利得を有しない間接音用の第2のスピーカと、 外部から与えられる音源信号を任意のレベル比の2出力に配分する音源信号配分手段とを備え、 前記音源信号配分手段の一方の出力で前記第1のスピーカを駆動し、他方の出力で前記第2のスピーカを駆動するようにして成る奥行方向音響再生装置。 Wherein the first speaker for direct sound having a large directivity gain listening direction, the collocated with the first speaker, the second speaker for the indirect sounds having no maximum directivity gain in said listening direction When, and a sound source signal distribution means for distributing the excitation signal supplied from the outside to the second output of any level ratio, driving the first speaker at one output of the sound source signal allocation means, the other output depth direction sound reproducing apparatus comprising so as to drive the second loudspeaker.
  3. 【請求項3】 請求項1又は2の奥行方向音響再生装置を左右に備え、それぞれの奥行方向音響再生装置の音源信号入力端子に左側、右側それぞれ対応する側の音源信号を入力することを特徴とする立体音響再生装置。 3. A comprising a depth direction sound reproducing apparatus according to claim 1 or 2 to the left and right, left sound source signal input terminal of each of the depth direction sound reproducing apparatus, characterized in that the input sound source signal on the side corresponding right stereophonic sound reproducing apparatus according to.
JP27584495A 1995-10-24 1995-10-24 Depth direction sound reproducing apparatus and a stereo sound reproducing apparatus Expired - Fee Related JP3830997B2 (en)

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