JPS63254495A - Reverberation generator - Google Patents
Reverberation generatorInfo
- Publication number
- JPS63254495A JPS63254495A JP62088644A JP8864487A JPS63254495A JP S63254495 A JPS63254495 A JP S63254495A JP 62088644 A JP62088644 A JP 62088644A JP 8864487 A JP8864487 A JP 8864487A JP S63254495 A JPS63254495 A JP S63254495A
- Authority
- JP
- Japan
- Prior art keywords
- delay circuit
- reverb
- frequency
- delay
- circuit means
- 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
- 230000005236 sound signal Effects 0.000 claims description 11
- 230000000694 effects Effects 0.000 description 20
- 230000004044 response Effects 0.000 description 13
- 230000008859 change Effects 0.000 description 9
- 238000010586 diagram Methods 0.000 description 9
- 239000006185 dispersion Substances 0.000 description 9
- 230000010363 phase shift Effects 0.000 description 6
- 230000003111 delayed effect Effects 0.000 description 5
- 230000001419 dependent effect Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000001965 increasing effect Effects 0.000 description 2
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
Landscapes
- Stereophonic System (AREA)
- Reverberation, Karaoke And Other Acoustics (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
産業上の利用分野
本発明はリバーブ発生装置に係り、特に分散特性をbつ
伝達関数を帰還路中にもつリバーブ発生装置に関する。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a reverb generator, and more particularly to a reverb generator having b transfer functions with dispersion characteristics in a feedback path.
従来の技術及びその問題点
従来、リバーブ発生装欝は電気楽器や音響再生装置を始
めとするB讐装置で出力音声信号を処理して音響効果を
変化さけたり臨場感を増大するのに使われている。従来
のリバーブ発生装置は入力信号に周波数に対して無関係
に一定の時間遅延を加えて出力する遅延回路と、この遅
延回路の出力信号に所定量の減衰を周波数に無関係に加
えて館記遅延回路の入力側へ帰還するアッテネータとよ
りなっている。かかる従来のリバーブ発生装置では以前
は遅延手段としてテープレコーダ等が使われたこともあ
るが最近ではデジタル回路装置が使われることが多い。Conventional technology and its problems Traditionally, reverb generation systems have been used in electronic musical instruments, sound reproduction devices, and other devices to process output audio signals to avoid changing acoustic effects or to increase the sense of presence. ing. Conventional reverb generators include a delay circuit that adds a fixed time delay to the input signal regardless of the frequency and then outputs the signal, and a delay circuit that adds a predetermined amount of attenuation to the output signal of this delay circuit regardless of the frequency. The attenuator is fed back to the input side. In the past, such conventional reverb generation devices used tape recorders and the like as delay means, but recently digital circuit devices are often used.
典型的な従来のリバーブ発生装四では1つの入力インパ
ルスに対して帰還量を規定するアッテネータの減衰定数
に応じて指数関数的に減衰する一連のインパルスが「延
回路により規定される遅延時間でくりかえされる。この
ような応答特性を有するリバーブ発生装置では可変なパ
ラメータが7ツテネータの減衰定数と遅延回路の遅一時
間の2つに限定されるため音管装4の出力音声信号の処
理の際の自由度が限定されてしまう。またかかるリバー
ブ発生装2を電気楽器やi[再生装置に使用してコンサ
ートホールのような残響効果や臨場感を得たい場合、減
衰定数を小さくしたり遅延時間を長くとると非常に不自
然な感じが生じ、極端な場合スピーカより放射される音
がいくつも重なっているのが間き取れるようになってし
まう。このため意図的にこのような特殊な効果を目的と
するのでない限り減衰定数及び遅延時間の選択範囲は極
めて狭い範囲に限られてしまうが、これに応じて自然な
臨場感や残響効果を始めとするKJられる?f ’ff
効果も限られたものになってしまう。例えば遅延量間が
典型的に約30ミリ秒以上になると不自然な感じが甚だ
しくなって使用に堪えなくなる。また帰還量を多くして
リバーブをかけ1−ぎても不自然になってしまう。In a typical conventional reverb generation system, a series of impulses that are exponentially attenuated according to the attenuation constant of an attenuator that defines the amount of feedback for one input impulse are "repeated with a delay time defined by a delay circuit". In a reverb generator with such a response characteristic, the variable parameters are limited to the attenuation constant of the 7-tuneator and the delay time of the delay circuit, so the processing of the output audio signal of the sound tube system 4 is The degree of freedom is limited.Furthermore, if you want to use the reverb generator 2 in an electric musical instrument or playback device to obtain the reverberation effect and presence of a concert hall, you may need to reduce the attenuation constant or delay time. If it is too long, it will give a very unnatural feel, and in extreme cases, the sound emitted from the speakers will overlap, making it seem like there are gaps between them.This is why special effects like this are intentionally used. The selection range of the attenuation constant and delay time is limited to an extremely narrow range unless this is the desired purpose, but it is possible to achieve KJ including a natural sense of presence and reverberation effects accordingly.
The effect will also be limited. For example, if the delay amount is typically about 30 milliseconds or more, the unnatural feeling becomes so severe that it becomes unusable. Also, even if you increase the amount of feedback and apply reverb, it will become unnatural.
一方、本願と同一出願人による特願昭60−12363
0号により、人カステレオ&声信号を通常の左右のスピ
ーカからそのまま再生すると同時に移相器を用いて周波
数に依存する時間遅延を低域での遅延量が大きく高域で
の遅延mが小さくなるように加え、この遅延ステレオ盲
声信号をイれぞれのスピーカから再生することによりコ
ンサートホールの音響空間を擬似的に形成する装置が公
知である。さらに、この周波数に依存する時間遅延を与
える移相器を従来のリバーブ発生装置に縦続接続してコ
ンサートホールで生じる多重反射による間接音の効果を
疑似的に形成する装4が本願と同一出願人により昭和6
2年3月4日に出願された日本回持n出願[ステレオ名
声信号再生装置」に記載されている。On the other hand, Japanese Patent Application No. 60-12363 filed by the same applicant as the present application
With No. 0, human stereo and voice signals can be played directly from normal left and right speakers, and at the same time, a phase shifter is used to reduce frequency-dependent time delays.The amount of delay in the low range is large, and the delay m in the high range is small. In addition, there is a known device that creates a pseudo-concert hall acoustic space by reproducing this delayed stereo blind voice signal from each speaker. Furthermore, a system 4 in which a phase shifter that provides a time delay depending on the frequency is connected in cascade to a conventional reverb generator to simulate the effect of indirect sound due to multiple reflections occurring in a concert hall was developed by the same applicant as the present application. By Showa 6
It is described in the Japan Reinstatement Application [Stereo Fame Signal Reproducing Apparatus] filed on March 4, 2013.
上記の装置はいずれも周波数に依存する遅延特性を有す
る移相器を使用することによりコンリートホールにおけ
る音響空間を擬似的に形成することができるが、リバー
ブ発生装置として使用した場合、帰還路を欠いていたり
移相器が帰還路の内側に含まれていないことのため発生
可能な残響効果が限られてしまう問題点があった。All of the above devices can create a pseudo acoustic space in a concrete hall by using a phase shifter with frequency-dependent delay characteristics, but when used as a reverb generator, they lack a return path. There is a problem in that the reverberation effect that can be generated is limited because the phase shifter is not included inside the return path.
問題点を解決するための1段
本発明は上記の問題点を入力端子に入来する入力音声信
号に周波数に無関係に一定の時間遅延を加えて出力端子
より出力する遅延回路手段と、前記遅延回路手段の出力
側より出力される出力信号を所定の減衰定数に従って減
衰させて前記遅延回路手段の入力側に帰還するアッテネ
ータ手段とよりなるリバーブ発生装置であって、前記パ
ノj端子から前、t!遅延回路手段を通って前記出力端
子に到る信号路中に前記遅延回路手段と直列にかつ前記
遅延回路手段の出力側から前記アッテネータ手段を通っ
て前記遅延回路手段の入力側に戻る帰還路中に合まれる
ように次式
但し、nは2以上の整数、
τiは時定数、
Sはラプラス演n子
で表わされる伝達関数を有する移相手段を備えたことを
特徴とするリバーブ発生装置により解決する。One Step for Solving the Problems The present invention solves the above problems by providing a delay circuit means for adding a constant time delay to an input audio signal that enters an input terminal and outputting it from an output terminal regardless of the frequency; A reverb generator comprising attenuator means for attenuating an output signal outputted from the output side of the circuit means according to a predetermined attenuation constant and returning it to the input side of the delay circuit means, ! in a signal path through delay circuit means to said output terminal in series with said delay circuit means and in a return path from the output side of said delay circuit means through said attenuator means to the input side of said delay circuit means. The reverb generator has a phase shifting means having a transfer function expressed by a Laplace operator n, where n is an integer of 2 or more, τi is a time constant, and S is a Laplace operator n. solve.
作用
前記移相手段は入力音声信号の位相を低域で周波数と共
に鋭く立上り高域で徐々に平坦になる周波数−位相遅れ
曲線に従って移相し、その結果出力信号に低周波域で大
きく高周波域で小さくなる時間遅延、すなわち分散を生
じる。移相手段は遅延回路手段に直列に、かつアッテネ
ータを通る帰遠路内に含まれているため入来した高パー
信号はくりかえし分散を受けた後出力され、出力音に非
常に自然な残響効果が生じる。またかかるリバーブ発生
装置では移相器の8延特性が司変であるため従来のリバ
ーブ発生装置よりも調節可能なパラメータの数が増大し
、昌費効宋の調整の自由度が増大する利点が得られる。Operation: The phase shifting means shifts the phase of the input audio signal according to a frequency-phase lag curve that rises sharply with frequency in the low frequency range and gradually flattens out in the high frequency range, and as a result, the output signal has a large shift in the low frequency range and a high frequency range. This results in a smaller time delay, or dispersion. Since the phase shifting means is included in series with the delay circuit means and in the return path passing through the attenuator, the incoming high par signal is repeatedly dispersed and then output, creating a very natural reverberation effect on the output sound. arise. In addition, in this reverb generator, since the phase shifter's 8-way characteristic is variable, the number of adjustable parameters is greater than in conventional reverb generators, which has the advantage of increasing the degree of freedom in adjusting the effect. can get.
実施例
第1図は本発明によるリバーブ発生装置の一実施例のブ
ロック系統図を示す。リバーブ発生装δ10の入力端子
1に入来した入力音声信号は遅延回路2で周波数に無関
係に一定時間遅延された後伝達関数g(S)を有する移
相器3で周波数に依存する移相作用を加えられて出力端
子4に出力音声信号どして出力される。伝達関数a(S
)は次式
但し、nは2以上の整数、
τiは時定数、
Sはラプラス演算子
で定義され、入力信号に低域で周波数と共に鋭く立上り
高域で徐々に平坦になる周波数−位相遅れ曲線に従う移
相作用を加える。この移相作用に対応して移相器の出力
信号は低域で大きく高域で小さくなる時間遅延を有する
ようになる。さらにこの出力音声信号は接続点5で分岐
しアッテネータ6を通ってπ延回路2の入力側加の接続
点7へ帰還される。以下本願では「帰還路1なる語を遅
延回路2の出力側から接続点5.アッテネータ6゜加i
接続点7を経て遅延回路2の入力端へT、lIる信号路
を指して使用するものとする。従って第1図のリバーブ
回路は帰還路8中に移相器5を含む。Embodiment FIG. 1 shows a block diagram of an embodiment of a reverb generator according to the present invention. The input audio signal that has entered the input terminal 1 of the reverb generator δ10 is delayed by a certain period of time regardless of frequency in a delay circuit 2, and then subjected to a frequency-dependent phase shift effect in a phase shifter 3 having a transfer function g(S). is added to the signal and output as an output audio signal to the output terminal 4. Transfer function a(S
) is the following formula, where n is an integer greater than or equal to 2, τi is a time constant, and S is defined by the Laplace operator, giving the input signal a frequency-phase lag curve that rises sharply with frequency in the low range and gradually flattens in the high range. Add a phase shift effect according to . Corresponding to this phase shift effect, the output signal of the phase shifter has a time delay that is large in the low frequency range and small in the high frequency range. Further, this output audio signal is branched at a connection point 5, passes through an attenuator 6, and is fed back to a connection point 7 on the input side of the π extension circuit 2. Hereinafter, in this application, the word "feedback path 1" is connected from the output side of the delay circuit 2 to the connection point 5.
It is assumed that the signal path T, II is used to reach the input terminal of the delay circuit 2 via the connection point 7. Therefore, the reverberation circuit of FIG. 1 includes a phase shifter 5 in the feedback path 8.
また遅延回路2と移相器3の順序は逆転してもよい。Furthermore, the order of the delay circuit 2 and phase shifter 3 may be reversed.
第2図は第1図のブロック系統図と等価なブロック線図
である。第2図中伝達関数e −S°61は遅延回路2
の伝達関数をあられし、Kはアッテネータ6の伝達関数
をあられす。0(S)は(1)式で定義した移相器3の
伝達関数である。但し、Δ王は遅延回路2により生じる
遅延時間であり周波数に無関係なけである。またKはア
ッテネータの減衰定数に対応し1よりも小さい正定数で
あるとする。FIG. 2 is a block diagram equivalent to the block system diagram in FIG. 1. In Fig. 2, the transfer function e −S°61 is the delay circuit 2.
, and K is the transfer function of attenuator 6. 0(S) is the transfer function of the phase shifter 3 defined by equation (1). However, ΔK is the delay time caused by the delay circuit 2 and is unrelated to the frequency. It is also assumed that K is a positive constant smaller than 1 and corresponds to the attenuation constant of the attenuator.
これらの伝達関数を使って第2図の入力端子1と出力端
子4の間の伝達関数G(S)は次式で表わされる。(2
)式を展17i1スると次式の表現が得られる。Using these transfer functions, the transfer function G(S) between the input terminal 1 and the output terminal 4 in FIG. 2 is expressed by the following equation. (2
) can be expanded to obtain the following expression.
G(s)=e−S”’ −o (s)(1+に−e−s
−Δ’ ” Q (S )−1−に2− e−2S中Δ
■a2 (s) 十に3− e−33’Δ’−o3 (
s)+・・・)
■ここで伝達関数G(S)について簡単に説明する
。ff!1111のため(1)式中のnを1とするとq
(s>は次式
%式%(4)
で表わされる。(4)式で表わされる伝達関数を有する
移相器の利得及び位相を第3図のボード線図に周波数の
関数として示す。但し、横軸の周波数は直線スケールで
示しである。第3図よりわかるように(4)式の伝達関
数を有する双糸では利得は周波数に対して独立であるが
位相は低域で周波数と共に負方向へ向って立上り(遅れ
)、a域で一180°に漸近する特性をhする。また位
相の遅れが90゛になる点の周波数fiが式%式%
で定義されるのがわかる。G(s)=e−S”' −o (s)(−e−s to 1+
-Δ' ” Q (S)-1- to 2- e-2S Δ
■a2 (s) 10 to 3- e-33'Δ'-o3 (
s)+...)
(2) Here, the transfer function G(S) will be briefly explained. ff! 1111, so if n in equation (1) is 1, then q
(s> is expressed by the following formula % formula % (4). The gain and phase of a phase shifter having a transfer function expressed by formula (4) are shown as a function of frequency in the Bode plot of Fig. 3. However, , the frequency on the horizontal axis is shown on a linear scale.As can be seen from Figure 3, in a twin thread with the transfer function of equation (4), the gain is independent of the frequency, but the phase becomes negative with the frequency in the low range. It is seen that the frequency fi at the point where the phase delay becomes 90 degrees is defined by the following formula.
(1)式のnが1以外の任意の整数である場合、利得は
第3図と同じく1であって周波数に対して変化しないが
位相の変化はn (Rになり、従って周波数が高い領域
では位相の変化間はnx(−180°)に漸近する。n
が大きい場合の位相変化間を第4図に概略的に示す。こ
のようにnが大きい場合(1)式で与えられる伝達関数
をhする要素の位相の遅れは低域で周波数と共に鋭く立
上りa域で平坦になる特性を有することがわかる。とこ
ろで各周波数fにおけるR延時間は位相をφとするとd
φ/dfに比例するため、O(S>のnが大きい場合低
域で周波数と共に鋭く立上る位相の遅れに対応して低い
周波数はど大きくなる傾向を右する。このような周波数
対位相遅れないし時間遅延特性を有する移相器のインパ
ルス応答の典型的な例を第5図に示す。第5図よりわか
るようにインパルスが入力された直後には出力に高い周
波数成分が現われ、低い周波数成分はぼれて現われる。If n in equation (1) is any integer other than 1, the gain is 1 as shown in Figure 3 and does not change with frequency, but the phase change is n (R, so in the high frequency region Then, the phase change asymptotes to nx (-180°).n
FIG. 4 schematically shows the phase change when . It can be seen that when n is large in this way, the phase delay of the element h in the transfer function given by equation (1) has a characteristic that it rises sharply with frequency in the low range and becomes flat in the a range. By the way, the R delay time at each frequency f is d if the phase is φ.
Since it is proportional to φ/df, when n of O(S> is large, the phase lag rises sharply with frequency in the low range, and the low frequency tends to become larger.Such frequency vs. phase lag A typical example of the impulse response of a phase shifter having time delay characteristics is shown in Figure 5.As can be seen from Figure 5, immediately after an impulse is input, high frequency components appear in the output, and low frequency components appear in the output. It pops up and appears.
これは分散である。(1)式で表わされ、る伝達関数を
有する移相回路は多数の縦続接続された演棹増幅器によ
って構成できるが、本願の出願人による特願昭60−1
23630号にその具体的な回路構成の記載がなされて
いるので本願ではその説朗を省略する。This is dispersion. A phase shift circuit having a transfer function expressed by equation (1) can be constructed from a large number of cascaded differential amplifiers.
Since the specific circuit configuration is described in No. 23630, the explanation thereof will be omitted in this application.
(3)式で表わされる伝達関数G(s)に戻っ−3・Δ
■
てG (s)の収束を調べると、e 及びg(S
)の絶対値は1でありまたKは1より小さい正数である
ためG(s)の各展開項はnと共に小さくなり収束する
ことがわかる。すなわち、リバーブ発生装置10の出力
端子4には時間Δ1−て゛くりかえされる度に小さくな
っていく応答が重畳されて現われる。第6図は伝達関数
G(s)、寸なわら本発明によるリバーブ発生装置10
のインパルス応答を各展開項毎に示すものである。第6
図中(a)は入力インパルスを、(b)は(3)式の第
1項e−8Δ■・q(s)によりΔ−[だけ遅延された
上に分散を加えられた応答を、(C)は第2項1<e−
2S゛Δ’ ・C20(s)GCJ、l)2Δ丁だけ遅
延された上にさらに分散を加えられた応答を、(d)は
第3項に2e−3S°Δ’ −g3 (s)により3
Δ■だけ遅延された上にさらに分散を加えられた応答を
あられす。図示した以外にも(3)式の展開の各項に応
じて無数のrlど共に収束していく応答列が形成される
。伝達関数G(S)はQ(S)をべき綴数の形で含むた
め(J(S)により生じる位相変化ψすなわち分散の大
きさは各展開項毎にq(s)の次数に比例して大きくな
る。Returning to the transfer function G(s) expressed by equation (3), -3・Δ
■ Examining the convergence of G (s), we find that e and g(S
) is 1, and since K is a positive number smaller than 1, it can be seen that each expansion term of G(s) becomes smaller and converges with n. That is, a superimposed response appears at the output terminal 4 of the reverb generator 10, which becomes smaller each time the time Δ1- is repeated. FIG. 6 shows the transfer function G(s) and the reverb generation device 10 according to the present invention.
The impulse response of is shown for each expansion term. 6th
In the figure, (a) shows the input impulse, and (b) shows the response delayed by Δ-[ by the first term e-8Δ■・q(s) in equation (3) and added with variance. C) is the second term 1<e−
2S゛∆' ・C20(s) GCJ, l) The response delayed by 2∆tons and further dispersion added, (d) is the third term with 2e-3S°∆' - g3 (s). 3
The response is delayed by Δ■ and further distributed. In addition to those shown in the figure, response sequences that converge with countless rl's are formed according to each term of the expansion of equation (3). Since the transfer function G(S) includes Q(S) in the form of a power number (the phase change ψ caused by J(S), that is, the size of the variance, is proportional to the order of q(s) for each expansion term. It gets bigger.
すなわち、g2 (s)による位相変化量はq(s)に
よる位相変化量の2倍になり、a3 (s)による位相
変化量はa (S)による位相変化量の3倍になる。リ
バーブ発生装置10の出力端子4では応答(b)、(c
)、<d)を始めとする一連の応答が重畳されて非常に
複雑な波形が形成される。That is, the amount of phase change due to g2 (s) is twice the amount of phase change due to q(s), and the amount of phase change due to a3 (s) is three times the amount of phase change due to a (S). At the output terminal 4 of the reverb generator 10, the responses (b) and (c
), <d), and other series of responses are superimposed to form a very complex waveform.
これはgA7図に示す従来の、すなわち帰還路中に分散
を生じる移相器を含まないリバーブ発生装蔚の牛純なイ
ンパルス応答と比較すると全く異なっていることがわか
る。It can be seen that this is completely different from the pure impulse response of the conventional reverb generator shown in Fig. gA7, which does not include a phase shifter that causes dispersion in the return path.
第8図及び第9図は本発明によるリバーブ発生装置のス
テレオ再生装置への応用例である。第8図は前記実施例
に記載の構成を有するリバーブ発生装置をステレオ再生
装置の左右のチャンネルに接続した例である。この場合
は左ものチャンネルで迎延時間ΔTL、Δ丁R1伝達関
数OL (S)。FIG. 8 and FIG. 9 are examples of application of the reverb generation device according to the present invention to a stereo reproduction device. FIG. 8 shows an example in which a reverb generator having the configuration described in the embodiment described above is connected to the left and right channels of a stereo reproduction device. In this case, the left channel has a delay time ΔTL and a transfer function OL(S).
0R(S)、帰還利得KL、KRをそれぞれ独立に調整
することにより再生音声信号を左右のチャンネルの録音
信号の録音状態に適合させて臨場感を最適化することが
できる。第9図は第8図の構成に加えて左チヤンネル出
力をアッテネータ □KL2を介して右チヤンネル入力
側へ供給し右チヤンネル出力を7ツテネータKR2を介
して左チヤンネル入力側へ帰還する構成を有する。第9
図の装置はコンサートホールの左右の壁に右及び左チャ
ンネルの音がそれぞれ反射するような複雑な5警効果を
擬似的に形成することができる。これらの菰nは本願の
出願人による特願昭60−123630号に記載の如き
多チャンネル音声信号再生装欝において間接音をシミュ
レートするのに使用すると臨場感の増強に効果的である
。&臂再生装置において臨li感を向上させるにはKの
値としては録音状態にもよるが0.2〜0.4位が好ま
しく、またΔ■としては5〜150ミリ秒までの範囲が
好ましい。By adjusting 0R(S) and the feedback gains KL and KR independently, it is possible to adapt the reproduced audio signal to the recording conditions of the left and right channel recording signals, thereby optimizing the sense of presence. In addition to the configuration shown in FIG. 8, FIG. 9 has a configuration in which the left channel output is supplied to the right channel input side via an attenuator □KL2, and the right channel output is fed back to the left channel input side via a 7-channel attenuator KR2. 9th
The device shown in the figure can simulate a complex five-alarm effect in which the sounds of the right and left channels are reflected on the left and right walls of a concert hall, respectively. When used to simulate indirect sounds in a multi-channel audio signal reproduction system as described in Japanese Patent Application No. 60-123630 filed by the present applicant, these sounds are effective in enhancing the sense of presence. In order to improve the sense of realism in a playback device, the value of K is preferably in the range of 0.2 to 0.4, although it depends on the recording condition, and the value of Δ■ is preferably in the range of 5 to 150 milliseconds. .
このように、本発明によるリバーブ発生装置は従来のリ
バーブ発生装置では不可能であった150ミリ秒に達す
る長い時間遅延を使っても自然な残響効果が得られる利
点を右する。また本発明によるリバーブ発生回路では移
相器3が帰還路8中に含まれるため移相器を構成する演
口増幅器の接続段数が少なくても大きな分散効果を得る
ことができる。例えば特願11160−123630日
に記載の移相器では演算増幅器の接続段数は少なくとち
30は必要であるが、本願の移相器では15位まで減ら
してb問題は生じない。Thus, the reverb generator according to the present invention has the advantage that a natural reverberation effect can be obtained even with a long time delay of up to 150 milliseconds, which is not possible with conventional reverb generators. Further, in the reverb generation circuit according to the present invention, since the phase shifter 3 is included in the feedback path 8, a large dispersion effect can be obtained even if the number of stages of connected amplifiers constituting the phase shifter is small. For example, in the phase shifter described in Japanese Patent Application No. 11160-123630, at least 30 stages of operational amplifiers are required, but in the phase shifter of the present application, the number can be reduced to 15 and problem b does not occur.
また、(1)式の伝達関数においてτ1を全て一定にし
て
g<5)=(上二エニ玉)″
1+τ・S
としてもよく、実質的に同等な効果をより(1甲な回路
構成で実現することができる。この場合はまたリバーブ
回路の調整がパラメータに、6丁及びてのみの調整によ
って可能になり筒中になる。Alternatively, in the transfer function of equation (1), τ1 may be kept constant and g < 5) = (upper two balls)'' 1 + τ・S. Substantially the same effect can be obtained with a circuit configuration that is In this case, the adjustment of the reverberation circuit is also possible by adjusting only six parameters, and it is in the cylinder.
発明の詳細
な説明したように、本発明は入力端子に入来する入力音
声信号に周波数に無関係に一定の時間遅延を加えて出力
端子より出力する遅延回路手段と、前記遅延回路手段の
出力側より出力される出力信号を所定の減衰定数に従っ
て減衰させて前記遅延回路手段の入力側に帰還するアッ
テネータ手段とよりなるリバーブ発生装置において、@
2入)J端子から前記遅延回路手段を通って前記出力端
子にfllる信号路中に前記遅延回路手段と直列にかつ
Ori記遅延回路手段の出力側からrfj配アッデネー
タ手段を通って前記遅延回路手段の入力側に戻る帰還路
中に含まれるように次式
但し、nは2以上の整数、
τiは時定数、
Sはラプラス演p子
で表わされる伝達関数を有する移相手段を備えることに
より移相手段による分散の効果が増強され、遅延回路手
段の遅延時間を長くしても不自然な感覚を生じることな
く残響効果を形成でき、残響効果の調整の自由爪が増大
し、広範囲にわたって残響効果を不自然な感覚を生じる
ことなく調整できるリバーブ発生iiが得られる。本発
明によるリバーブ発生菰lを音響再生装置や楽器に応用
するとコンサートホールでの臨場感の増強が可能になり
従来のハイファイ装置では得られなかった快適な音響再
生が可能になる。また元の録音がひずんでいても本発明
によるリバーブ発生装置を使うと再生高を高楽的に改善
することができる。DETAILED DESCRIPTION OF THE INVENTION As described in detail, the present invention includes a delay circuit means for adding a fixed time delay to an input audio signal input to an input terminal regardless of frequency and outputting the resultant signal from an output terminal; In a reverb generation device comprising attenuator means for attenuating an output signal outputted from a device according to a predetermined attenuation constant and feeding it back to the input side of the delay circuit means,
2) In a signal path from the J terminal to the output terminal through the delay circuit means, in series with the delay circuit means, and from the output side of the delay circuit means to the delay circuit through the rfj distribution addinator means. By providing a phase shift means having a transfer function expressed by the following formula, where n is an integer of 2 or more, τi is a time constant, and S is a Laplace operator p, so as to be included in the feedback path returning to the input side of the means. The dispersion effect of the phase shift means is enhanced, and even if the delay time of the delay circuit means is lengthened, a reverberation effect can be created without causing an unnatural feeling.The freedom to adjust the reverberation effect is increased, and reverberation can be achieved over a wide range. A reverb generation ii is obtained in which the effect can be adjusted without creating an unnatural feel. When the reverb generator according to the present invention is applied to a sound reproduction device or a musical instrument, it becomes possible to enhance the sense of presence in a concert hall, and it becomes possible to reproduce comfortable sound that cannot be obtained with conventional high-fidelity equipment. Furthermore, even if the original recording is distorted, the reproduction height can be musically improved by using the reverb generator according to the present invention.
第1図は本発明によるリバーブ発生装置の一実施例を示
すブロック系統図、第2図は第1図のリバーブ発([装
置に対応する等価なブロック線図、第3図は簡易化され
た伝達関数0(S)を有する第1図及び第2図の移相器
の周波数特性の例を示すボーアね図、第4図は第1図及
び第2図の移相器の周波数特性の一般的な例を示す特性
図、第5図は第1図及び第2図の移相器のインパルス応
答(分散)を示1“図、第6図は第1図に示した本発明
になる帰還路中に分散を生じる移相器を有するリバーブ
発生装置のインパルス応答を示す図、第7図は従来の分
散を生じる移相器を含まないリバーブ発生装置のインパ
ルス応答を比較のため示す図、第8図及び第9図は本発
明によるリバーブ発生装置をスデレオ再生装置に応用す
る場合の例を示すブロック系統図である。
1・・・入力端子、2・・・理延回路、3・・・移相器
、4・・・111力端子、5・・・接続点、6・・・ア
ッテネータ、7・・・加惇接続点、8・・・帰還路、1
0・・・リバーブ発生装′il。
特許出願人 ダイナベクター株式会ン1゛・−2ノ
42図。
第4図
第5図
第7図
第8図
第9ΣFig. 1 is a block diagram showing an embodiment of the reverb generator according to the present invention, Fig. 2 is an equivalent block diagram corresponding to the reverb generator ([device] shown in Fig. 1, and Fig. 3 is a simplified diagram) A Bohr diagram showing an example of the frequency characteristics of the phase shifter shown in Figs. 1 and 2 with a transfer function of 0 (S), and Fig. 4 shows the general frequency characteristic of the phase shifter shown in Figs. 1 and 2. Figure 5 shows the impulse response (dispersion) of the phase shifter shown in Figures 1 and 2. Figure 6 shows the feedback according to the present invention shown in Figure 1. FIG. 7 is a diagram showing the impulse response of a reverb generator having a phase shifter that causes dispersion in the path; FIG. 8 and 9 are block system diagrams showing an example in which the reverb generation device according to the present invention is applied to a stereo reproducing device. 1... Input terminal, 2... Rien circuit, 3... Phase shifter, 4...111 power terminal, 5... Connection point, 6... Attenuator, 7... Additional connection point, 8... Return path, 1
0... Reverb generation device'il. Patent applicant Dynavector Co., Ltd. 1゛・-2 No. 42. Figure 4 Figure 5 Figure 7 Figure 8 Figure 9Σ
Claims (2)
係に一定の時間遅延を加えて出力端子より出力する遅延
回路手段と、該遅延回路手段の出力側より出力される出
力信号を所定の減衰定数に従って減衰させて該遅延回路
手段の入力側に帰還するアッテネータ手段とよりなるリ
バーブ発生装置であって、該入力端子から該遅延回路手
段を通って該出力端子に到る信号路中に該遅延回路手段
と直列にかつ該遅延回路手段の出力側から該アッテネー
タ手段を通って該遅延回路手段の入力側に戻る帰還路中
に含まれるように次式 g(s)=π^n_i_=_1(1−τ_i・s)/(
1+τ_i・s)但し、nは2以上の整数、 τ_iは時定数、 sはラプラス演算子 で表わされる伝達関数を有する移相手段を備えたことを
特徴とするリバーブ発生装置。(1) Delay circuit means for adding a fixed time delay to an input audio signal that enters an input terminal, regardless of frequency, and outputting the resulting signal from an output terminal; A reverb generation device comprising attenuator means that attenuates according to an attenuation constant and returns to the input side of the delay circuit means, the reverb generating device comprising: in series with the delay circuit means and included in a feedback path from the output side of the delay circuit means through the attenuator means back to the input side of the delay circuit means g(s)=π^n_i_=_1 (1-τ_i・s)/(
1+τ_i·s) where n is an integer greater than or equal to 2, τ_i is a time constant, and s is a phase shifter having a transfer function expressed by a Laplace operator.
_iはiの全変化範囲において同一としたことを特徴と
する特許請求の範囲第1項記載のリバーブ発生装置。(2) Time constant τ in the transfer function g(s) of the phase shifting means
2. The reverb generation device according to claim 1, wherein _i is the same over the entire variation range of i.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62088644A JP2901240B2 (en) | 1987-04-13 | 1987-04-13 | Reverb generator |
US07/152,280 US4955057A (en) | 1987-03-04 | 1988-02-04 | Reverb generator |
GB8803196A GB2202111B (en) | 1987-03-04 | 1988-02-11 | Reverb generator |
DE3806915A DE3806915A1 (en) | 1987-03-04 | 1988-03-03 | REVERB (REVERBER) GENERATOR |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62088644A JP2901240B2 (en) | 1987-04-13 | 1987-04-13 | Reverb generator |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS63254495A true JPS63254495A (en) | 1988-10-21 |
JP2901240B2 JP2901240B2 (en) | 1999-06-07 |
Family
ID=13948528
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62088644A Expired - Lifetime JP2901240B2 (en) | 1987-03-04 | 1987-04-13 | Reverb generator |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2901240B2 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0340700A (en) * | 1989-07-07 | 1991-02-21 | Matsushita Electric Ind Co Ltd | Echo generator |
JP2007281699A (en) * | 2006-04-04 | 2007-10-25 | Mitsubishi Electric Corp | Reverberation adding device and reverberation adding program |
JP2013541275A (en) * | 2010-09-08 | 2013-11-07 | ディーティーエス・インコーポレイテッド | Spatial audio encoding and playback of diffuse sound |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5683798A (en) * | 1979-12-12 | 1981-07-08 | Casio Computer Co Ltd | Reverberation generator |
JPS61281799A (en) * | 1985-06-07 | 1986-12-12 | Dainabekutaa Kk | Sound signal reproducing system |
-
1987
- 1987-04-13 JP JP62088644A patent/JP2901240B2/en not_active Expired - Lifetime
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5683798A (en) * | 1979-12-12 | 1981-07-08 | Casio Computer Co Ltd | Reverberation generator |
JPS61281799A (en) * | 1985-06-07 | 1986-12-12 | Dainabekutaa Kk | Sound signal reproducing system |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0340700A (en) * | 1989-07-07 | 1991-02-21 | Matsushita Electric Ind Co Ltd | Echo generator |
JP2007281699A (en) * | 2006-04-04 | 2007-10-25 | Mitsubishi Electric Corp | Reverberation adding device and reverberation adding program |
JP2013541275A (en) * | 2010-09-08 | 2013-11-07 | ディーティーエス・インコーポレイテッド | Spatial audio encoding and playback of diffuse sound |
Also Published As
Publication number | Publication date |
---|---|
JP2901240B2 (en) | 1999-06-07 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US4063034A (en) | Audio system with enhanced spatial effect | |
EP0880871B1 (en) | Sound recording and reproduction systems | |
US4215242A (en) | Reverberation system | |
US4955057A (en) | Reverb generator | |
JP2000152399A (en) | Sound field effect controller | |
JPS61281799A (en) | Sound signal reproducing system | |
JP2956545B2 (en) | Sound field control device | |
JPH0157880B2 (en) | ||
WO2007046288A1 (en) | Localization control device, localization control method, localization control program, and computer-readable recording medium | |
US5724429A (en) | System and method for enhancing the spatial effect of sound produced by a sound system | |
KR100386919B1 (en) | Karaoke Apparatus | |
JP2901240B2 (en) | Reverb generator | |
US5274708A (en) | Digital stereo sound enhancement unit and method | |
KR880003045Y1 (en) | Echo generator | |
JPH06335094A (en) | Sound field reproducing device | |
JPH05191898A (en) | Sound image expansion device | |
JPH03250900A (en) | Headphone reproducing device | |
JPS58190199A (en) | Pseudo stereo system | |
JPH03958B2 (en) | ||
JPS58194094A (en) | Sound field spatiality creater | |
KR20010001415A (en) | Colorless reverberation generator | |
JPH0535680Y2 (en) | ||
JPH0644840B2 (en) | Stereo audio signal playback device | |
JPH02170796A (en) | Audio reproducing device | |
JPH04343600A (en) | Reverberation device |