JPH0764582A - On-vehicle sound field correcting device - Google Patents
On-vehicle sound field correcting deviceInfo
- Publication number
- JPH0764582A JPH0764582A JP5212670A JP21267093A JPH0764582A JP H0764582 A JPH0764582 A JP H0764582A JP 5212670 A JP5212670 A JP 5212670A JP 21267093 A JP21267093 A JP 21267093A JP H0764582 A JPH0764582 A JP H0764582A
- Authority
- JP
- Japan
- Prior art keywords
- sound field
- reverberation
- component
- field correction
- reverberation time
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Stereophonic System (AREA)
- Circuit For Audible Band Transducer (AREA)
- Filters That Use Time-Delay Elements (AREA)
- Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
- Reverberation, Karaoke And Other Acoustics (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、ディジタルフィルタを
用いて車室内音場を最適な音場に補正する等に利用する
車載用音場補正装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle-mounted sound field correction device used for correcting a sound field in a vehicle compartment to an optimum sound field by using a digital filter.
【０００２】[0002]
【従来の技術】図４は、従来の車載用音場補正装置のオ
ーディオ出力が２チャンネルの場合の構成を示してい
る。図４において、４０１，４０２はハイパスフィルタ
（ＨＰＦ）、４０３，４０４は遅延器、４０５，４０６
はローパスフィルタ（ＬＰＦ）、４０７，４０８はダウ
ンサンプリング手段、４０９，４１０，４１１，４１２
は音場補正用ＦＩＲフィルタ、４１３，４１４は加算
器、４１５，４１６はアップサンプリング手段、４１
７，４１８はＬＰＦ、４１９，４２０は加算器である。
また、音場補正用ＦＩＲフィルタ４０９〜４１２に示さ
れる（Ａ11）、（Ａ12）、（Ａ21）、（Ａ22）は、それ
ぞれＦＩＲフィルタ４０９〜４１２の伝達関数である。2. Description of the Related Art FIG. 4 shows the configuration of a conventional vehicle-mounted sound field correction apparatus in which the audio output is two channels. In FIG. 4, 401 and 402 are high-pass filters (HPF), 403 and 404 are delay devices, and 405 and 406.
Is a low pass filter (LPF), 407 and 408 are downsampling means, and 409, 410, 411 and 412.
Is a sound field correction FIR filter, 413, 414 are adders, 415, 416 are upsampling means, 41
Reference numerals 7, 418 are LPFs, and 419, 420 are adders.
Further, (A 11 ), (A 12 ), (A 21 ), and (A 22 ) shown in the sound field correction FIR filters 409 to 412 are transfer functions of the FIR filters 409 to 412, respectively.
【０００３】次に上記従来の動作について説明する。図
４においてディジタルオーディオ入力信号はＨＰＦ４０
１，４０２およびＬＰＦ４０５，４０６によって高い周
波数成分と低い周波数成分に分離される。ＨＰＦ４０
１，４０２によって分離された高い周波数成分は、遅延
器４０３，４０４によってＦＩＲフィルタ４０９〜４１
２における処理によって生じる遅延分遅延させられ、加
算器４１９，４２０の一方の入力となる。ＬＰＦ４０
５，４０６によって分離された低い周波数成分は、ダウ
ンサンプリング手段４０７，４０８によってサンプリン
グ周波数を下げられる。ＬＰＦ４０５，４０６は、エリ
アシング防止用のフィルタの役割も持つ。サンプリング
周波数を下げられた信号は、ＦＩＲフィルタ４０９〜４
１２によって所望の振幅・位相特性にさせられ加算器４
１３，４１４の入力となる。加算器４１３，４１４の出
力信号は、アップサンプリング手段４１５，４１６によ
ってサンプリング周波数を上げられ、エリアシング防止
用のＬＰＦ４１７，４１８を通り、加算器４１９，４２
０のもう一方の入力となる。加算器４１９，４２０の出
力は、スピーカによって車室内に放射される。Next, the conventional operation will be described. In FIG. 4, the digital audio input signal is HPF40.
1, 402 and LPFs 405, 406 separate the high and low frequency components. HPF40
The high frequency components separated by 1, 402 are FIR filters 409-41 by delay devices 403, 404.
It is delayed by the delay caused by the processing in 2 and becomes one input of the adders 419 and 420. LPF40
The sampling frequency of the low frequency components separated by 5, 406 is lowered by the down sampling means 407, 408. The LPFs 405 and 406 also serve as filters for preventing aliasing. The signals whose sampling frequency is lowered are FIR filters 409-4.
A desired amplitude / phase characteristic is obtained by 12 and an adder 4
It becomes the input of 13,414. The output signals of the adders 413 and 414 have their sampling frequencies increased by the upsampling means 415 and 416, pass through LPFs 417 and 418 for preventing aliasing, and adders 419 and 42.
It becomes the other input of 0. The outputs of the adders 419 and 420 are radiated into the vehicle compartment by the speaker.
【０００４】ＦＩＲフィルタ４０９〜４１２の係数の算
出方法を次に示す。車室内における加算器４１９，４２
０の出力から受聴者両耳までの伝達関数行列を、The method of calculating the coefficients of the FIR filters 409-412 will be described below. Adders 419 and 42 in the passenger compartment
The transfer function matrix from the output of 0 to both ears of the listener is
【０００５】[0005]
【数１】 [Equation 1]
【０００６】とし、所望の伝達関数行列を、And the desired transfer function matrix is
【０００７】[0007]
【数２】 [Equation 2]
【０００８】とし、音場補正用ＦＩＲフィルタ４０９〜
４１２の伝達関数行列を、The sound field correction FIR filter 409-
412 transfer function matrix,
【０００９】[0009]
【数３】 [Equation 3]
【００１０】とすることで、車室内音場を所望の音場に
することができる。ただしＨ11は加算器４１９出力から
受聴者左耳までの伝達関数、Ｈ21は加算器４１９出力か
ら右耳まで、Ｈ12は加算器４２０出力から左耳まで、Ｈ
22は加算器４２０出力から右耳までの伝達関数であり、
Ｋ11は所望の音場、例えば試聴室内での２つのスピーカ
の中央におけるＬチャンネルオーディオ信号入力から受
聴者左耳まで、Ｋ21はＬチャンネル入力から右耳まで、
Ｋ12はＲチャンネル入力から左耳まで、Ｋ22はＲチャン
ネル入力から右耳までの伝達関数であり、各行列の要素
はそれぞれ周波数領域で表現されたものである。また、
Ａ11はＦＩＲフィルタ４０９の伝達関数、Ａ12はＦＩＲ
フィルタ４１０の伝達関数、Ａ21はＦＩＲフィルタ４１
１の伝達関数、Ａ22はＦＩＲフィルタ４１２の伝達関数
である。With the above arrangement, the sound field in the vehicle interior can be set to a desired sound field. However, H 11 is a transfer function from the output of the adder 419 to the listener's left ear, H 21 is from the output of the adder 419 to the right ear, H 12 is from the output of the adder 420 to the left ear, H
22 is a transfer function from the output of the adder 420 to the right ear,
K 11 is a desired sound field, for example, L channel audio signal input at the center of two speakers in the listening room to the listener's left ear, K 21 is L channel input to the right ear,
K 12 is the transfer function from the R channel input to the left ear, and K 22 is the transfer function from the R channel input to the right ear, and the elements of each matrix are expressed in the frequency domain. Also,
A 11 is the transfer function of the FIR filter 409, A 12 is the FIR
Transfer function of filter 410, A 21 is FIR filter 41
A transfer function of 1 and A 22 are transfer functions of the FIR filter 412.
【００１１】このように、上記従来の車載用音場補正装
置でも、補正用ＦＩＲフィルタ４０９〜４１２の伝達関
数を適当に選ぶことで、左右非対称な音場である車室内
音場を所望の音場に補正することができる。As described above, even in the above-described conventional vehicle-mounted sound field correction device, the transfer function of the correction FIR filters 409 to 412 is appropriately selected, so that the vehicle interior sound field, which is a left-right asymmetric sound field, can be converted into a desired sound. Can be corrected in place.
【００１２】[0012]
【発明が解決しようとする課題】しかしながら、上記従
来の車載用音場補正装置では、低い周波数帯域は所望の
特性に補正され、したがって残響時間についても所望の
ものになるが、車室内という極めて狭い空間においては
音の壁への衝突の回数が多いことから、高い周波数帯域
については音の吸収が激しく残響時間が短くなり、低い
周波数帯域と高い周波数帯域との間で極めて不均質な音
場となるという問題があった。However, in the above-described conventional vehicle-mounted sound field correction apparatus, the low frequency band is corrected to the desired characteristic, and the reverberation time is also desired, but it is extremely narrow in the vehicle interior. Since sound often collides with the wall in the space, sound is strongly absorbed in the high frequency band and the reverberation time becomes short, resulting in a very inhomogeneous sound field between the low frequency band and the high frequency band. There was a problem of becoming.
【００１３】本発明はこのような従来の問題を解決する
ものであり、たとえば試聴室のように残響時間がほぼ全
周波数帯域で平坦で最適な音場に補正することのできる
優れた車載用音場補正装置を提供することを目的とする
ものである。The present invention solves such a conventional problem. For example, as in a listening room, an excellent vehicle-mounted sound capable of correcting a reverberation time to a flat and optimum sound field in almost the entire frequency band. It is intended to provide a field correction device.
【００１４】[0014]
【課題を解決するための手段】本発明は上記目的を達成
するために、オーディオ信号を高い周波数成分と低い周
波数成分に分離する分離手段と、分離された低い周波数
成分に対して振幅及び位相特性の補正を行う補正手段
と、分離された高い周波数成分に対して当該周波数成分
から残響成分を生成する残響成分生成手段と、補正され
た低い周波数成分、分離された高い周波数成分および当
該残響成分とを加算する加算器を備えたものである。In order to achieve the above object, the present invention provides a separating means for separating an audio signal into a high frequency component and a low frequency component, and an amplitude and phase characteristic for the separated low frequency component. And a reverberation component generation unit that generates a reverberation component from the separated high frequency component with respect to the separated high frequency component, a corrected low frequency component, a separated high frequency component and the reverberation component. Is provided with an adder for adding.
【００１５】[0015]
【作用】したがって、本発明によれば、低い周波数帯域
では音場補正用ＦＩＲフィルタによって適正な残響時間
をも含めた音場の設定を行い、高い周波数帯域では残響
成分生成手段により生成された残響成分を付加して所望
の残響時間に設定を行い、全周波数帯域で最適な残響時
間を有する音場を実現する。Therefore, according to the present invention, the sound field including the appropriate reverberation time is set by the sound field correction FIR filter in the low frequency band, and the reverberation generated by the reverberation component generating means in the high frequency band. A component is added to set a desired reverberation time, and a sound field having an optimum reverberation time in the entire frequency band is realized.
【００１６】[0016]
【実施例】図１は本発明の実施例の構成を示すものであ
る。図１において、１０１，１０２はＨＰＦ、１０３，
１０４は遅延器、１０５，１０６はＬＰＦ、１０７，１
０８はダウンサンプリング手段、１０９，１１０，１１
１，１１２は音場補正用ＦＩＲフィルタ、１１３，１１
４は加算器、１１５，１１６はアップサンプリング手
段、１１７，１１８はＬＰＦ、１１９，１２０は加算
器、１２１は残響成分生成手段である。このような残響
成分生成手段１２１は、例えば、ディジタルオーディオ
入力信号の一部に一定の遅延処理を施す遅延回路と、こ
の遅延回路による遅延処理信号の一部を減衰する減衰器
と、この減衰器からの出力とディジタルオーディオ入力
信号とを加算し前記遅延回路に出力する加算器などによ
る、いわゆるフィードバックループによって構成するこ
とが可能である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows the configuration of an embodiment of the present invention. In FIG. 1, 101 and 102 are HPF, 103,
104 is a delay device, 105 and 106 are LPFs, 107 and 1
08 is a down sampling means, 109, 110, 11
1, 112 are FIR filters for sound field correction, 113, 11
Reference numeral 4 is an adder, 115 and 116 are upsampling means, 117 and 118 are LPFs, 119 and 120 are adders, and 121 is a reverberation component generating means. Such reverberation component generating means 121 is, for example, a delay circuit for performing a certain delay process on a part of a digital audio input signal, an attenuator for attenuating a part of the delay process signal by the delay circuit, and the attenuator. It is possible to form a so-called feedback loop by an adder that adds the output from the digital audio input signal and the digital audio input signal and outputs the added signal to the delay circuit.
【００１７】次に上記本実施例の動作について説明す
る。図１においてディジタルオーディオ入力信号はＨＰ
Ｆ１０１，１０２およびＬＰＦ１０５，１０６によって
高い周波数成分と低い周波数成分に分離される。ＬＰＦ
１０５，１０６、ＨＰＦ１０１，１０２のカットオフ周
波数は、音場補正用ＦＩＲフィルタ１０９〜１１２を用
いて補正を行った場合、音質が劣化せずに補正効果のあ
る５００〜４ｋＨｚ付近に設定される。また、ＬＰＦと
ＨＰＦのカットオフ周波数の関係は、同一周波数に設定
してもよいが、ＬＰＦとＨＰＦそれぞれを通過する信号
の特性を重ね合わせた特性が平坦になるように、ＬＰＦ
のカットオフ周波数をより低い周波数に設定し、ＨＰＦ
のカットオフ周波数をより高い周波数に設定するほうが
十分な音場補正が可能となる。さらにＬＰＦ１１７，１
１８のカットオフ周波数は、ＬＰＦ１０５，１０６のカ
ットオフ周波数と同一周波数に設定されている。Next, the operation of this embodiment will be described. In FIG. 1, the digital audio input signal is HP
The F101 and 102 and the LPFs 105 and 106 separate the high frequency component and the low frequency component. LPF
The cutoff frequencies of 105 and 106 and HPFs 101 and 102 are set to around 500 to 4 kHz, which has a correction effect without deterioration of sound quality when correction is performed using the sound field correction FIR filters 109 to 112. The relationship between the cutoff frequencies of the LPF and the HPF may be set to the same frequency, but the LPF and the HPF may be set to have a flat characteristic so that the characteristics of the signals passing through the LPF and the HPF are flat.
Set the cutoff frequency of the
Setting the cut-off frequency of to a higher frequency allows sufficient sound field correction. Furthermore, LPF 117,1
The cutoff frequency of 18 is set to the same frequency as the cutoff frequencies of the LPFs 105 and 106.
【００１８】ＨＰＦ１０１，１０２によって分離された
高い周波数成分は、遅延器１０３，１０４によってＦＩ
Ｒフィルタ１０９〜１１２によって生じる遅延分遅延さ
せられ、加算器１１９，１２０の一方の入力となる。Ｌ
ＰＦ１０５，１０６によって分離された低い周波数成分
は、ダウンサンプリング手段１０７，１０８によってサ
ンプリング周波数を下げられる。サンプリング周波数を
下げられた信号は、ＦＩＲフィルタ１０９〜１１２によ
って所望の振幅・位相特性にさせられ加算器１１３，１
１４の入力となる。加算器１１３，１１４の出力信号
は、アップサンプリング手段１１５，１１６によってサ
ンプリング周波数を上げられ、エリアシング防止用のＬ
ＰＦ１１７，１１８を通り、加算器１１９，１２０のも
う一方の入力となる。The high frequency components separated by the HPFs 101 and 102 are FI by delay devices 103 and 104.
It is delayed by the delay generated by the R filters 109 to 112 and becomes one input of the adders 119 and 120. L
The sampling frequency of the low frequency components separated by the PFs 105 and 106 is lowered by the downsampling means 107 and 108. The signals whose sampling frequency has been lowered are made to have desired amplitude / phase characteristics by the FIR filters 109 to 112, and the adders 113 and 1 are added.
It becomes 14 inputs. The sampling frequency of the output signals of the adders 113 and 114 is increased by the upsampling means 115 and 116, and L for preventing aliasing is used.
It passes through the PFs 117 and 118 and becomes the other input of the adders 119 and 120.
【００１９】また、遅延器１０３，１０４の出力信号か
らは、残響成分生成手段１２１によって高い周波数成分
についての残響成分が生成され、かかる残響成分は加算
器１１９，１２０のもう一方の入力となり、ＦＩＲフィ
ルタ１０９〜１１２を用いた音場補正だけでは、短いま
まである高い周波数帯域の残響時間を所望の特性にする
ことができる。The reverberation component generating means 121 generates reverberation components for high frequency components from the output signals of the delay devices 103 and 104, and the reverberation components serve as the other inputs of the adders 119 and 120 to generate the FIR. Only by correcting the sound field using the filters 109 to 112, the reverberation time in the high frequency band which remains short can be made to have a desired characteristic.
【００２０】このように、上記実施例によれば、単に低
い周波数帯域において、聴覚上より自然な音の再生を可
能とするだけでなく、低い周波数帯域では音場補正用Ｆ
ＩＲフィルタ１０９〜１１２によって所望の残響時間が
設定でき、高い周波数帯域でも残響成分生成手段１２１
によって所望の残響時間が設定できるという効果を有す
る。また、残響成分生成手段１２１の入力として、ＨＰ
Ｆ１０１，１０２によって分離された高い周波数成分を
用いているので、ＬＰＦ１０５，１０６によって分離さ
れた低い周波数成分を用いるＦＩＲフィルタ１０９〜１
１２の特性には影響せず、高い周波数帯域についてのみ
効果的な残響成分の生成が可能であり、より自然な音の
再生が可能となる。As described above, according to the above-described embodiment, not only is it possible to reproduce a sound that is more auditorily natural in the low frequency band, but also in the low frequency band, the sound field correction F is used.
A desired reverberation time can be set by the IR filters 109 to 112, and the reverberation component generating means 121 even in a high frequency band.
This has the effect that a desired reverberation time can be set. Further, as an input of the reverberation component generating means 121, HP
Since the high frequency components separated by the F101 and 102 are used, the FIR filters 109 to 1 that use the low frequency components separated by the LPFs 105 and 106 are used.
The reverberation component can be effectively generated only in a high frequency band without affecting the characteristics of No. 12, and more natural sound can be reproduced.
【００２１】なお、図２に示すように、当該残響成分生
成手段１２１に対して、残響時間変更ボタン２０１と係
数入れ換え器２０２を設けることにより、残響時間変更
ボタン２０１を押下すると、係数入れ換え器２０２によ
り、音場補正用ＦＩＲフィルタ１０９〜１１２および残
響成分生成手段１２１の係数が入れ換えられるようにす
ることにより、任意に残響時間の変更を行うことができ
る。As shown in FIG. 2, the reverberation time changing button 201 and the coefficient replacing unit 202 are provided in the reverberation component generating means 121, and when the reverberation time changing button 201 is pressed, the coefficient changing unit 202. Thus, the coefficients of the sound field correction FIR filters 109 to 112 and the reverberation component generation means 121 are exchanged, whereby the reverberation time can be arbitrarily changed.
【００２２】また、図３に示すように、入力信号の種類
について判別する信号判別手段３０１と入力信号の種類
によって最適な残響時間を算出する残響時間選択手段３
０２と係数入れ換え器２０２を設けることにより、判別
手段３０１により入力信号の種別を自動的に判別し、残
響時間選択手段３０２が各々の種別に応じた最適な残響
時間、例えば音楽信号であれば長い残響時間、アナウン
スであれば短い残響時間を選択し、係数入れ換え器２０
２がかかる選択に基いて音場補正用ＦＩＲフィルタ１０
９〜１１２および残響成分生成手段１２１の係数が入れ
換え、信号源に対応した残響時間を随時得ることが可能
となる。なお、前記判別手段３０１は、例えば、Ｌチャ
ンネル信号レベルとＲチャンネル信号レベルの和の絶対
値から無音信号を検出し、この検出回数と各信号のレベ
ル差をもとに音楽信号とアナウンス信号との判別を行う
ことにより実現しうる。Further, as shown in FIG. 3, the signal discrimination means 301 for discriminating the type of the input signal and the reverberation time selecting means 3 for calculating the optimum reverberation time according to the type of the input signal.
02 and the coefficient interchanger 202, the discriminating means 301 automatically discriminates the type of the input signal, and the reverberation time selecting means 302 has an optimum reverberation time corresponding to each type, for example, a long music signal. Reverberation time, if announcement, select short reverberation time
FIR filter 10 for sound field correction based on such selection
9 to 112 and the coefficients of the reverberation component generating means 121 are exchanged, and the reverberation time corresponding to the signal source can be obtained at any time. The discriminating means 301 detects a silent signal from the absolute value of the sum of the L-channel signal level and the R-channel signal level, and determines the music signal and the announcement signal based on the number of times of detection and the level difference between the signals. It can be realized by determining
【００２３】[0023]
【発明の効果】本発明は上記実施例より明らかなよう
に、音場補正用ＦＩＲフィルタによって、単に低い周波
数帯域において聴覚上より自然な音の再生を可能とする
だけでなく、所望の残響時間の設定ができ、高い周波数
帯域の残響時間も残響成分生成手段によって所望の残響
時間が設定でき、また、音場補正用ＦＩＲフィルタの係
数や残響成分生成手段の係数を入れ換えることにより、
残響時間を任意に変更できるという効果を有する。As is apparent from the above-described embodiments, the present invention not only enables the auditory more natural sound reproduction in the low frequency band by the sound field correction FIR filter, but also provides a desired reverberation time. Can be set, the reverberation time of a high frequency band can also be set to a desired reverberation time by the reverberation component generation means, and the coefficient of the sound field correction FIR filter and the coefficient of the reverberation component generation means can be replaced.
This has the effect that the reverberation time can be changed arbitrarily.
【図１】本発明の実施例における車載用音場補正装置の
概略ブロック図FIG. 1 is a schematic block diagram of an in-vehicle sound field correction device according to an embodiment of the present invention.
【図２】残響時間変更ボタンと係数入れ換え器とを備え
た本発明の実施例における車載用音場補正装置の概略ブ
ロック図FIG. 2 is a schematic block diagram of a vehicle-mounted sound field correction apparatus according to an embodiment of the present invention, which includes a reverberation time changing button and a coefficient changing device.
【図３】残響時間設定手段と係数入れ換え器とを備えた
本発明の実施例における車載用音場補正装置の概略ブロ
ック図FIG. 3 is a schematic block diagram of an on-vehicle sound field correction apparatus according to an embodiment of the present invention, which includes reverberation time setting means and a coefficient transposition device.
【図４】従来の車載用音場補正装置の概略ブロック図FIG. 4 is a schematic block diagram of a conventional vehicle-mounted sound field correction device.
１２１ 残響成分生成手段 ２０１ 残響時間変更ボタン ２０２ 係数入れ換え器 ３０１ 信号判別手段 ３０２ 残響時間設定手段 121 reverberation component generation means 201 reverberation time change button 202 coefficient replacement device 301 signal discrimination means 302 reverberation time setting means
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｈ０３Ｈ 21/00 8842−5Ｊ Ｈ０４Ｒ 3/04 3/12 Ｚ Ｈ０４Ｓ 1/00 Ｄ 8421−5Ｈ ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification code Internal reference number FI Technical display location H03H 21/00 8842-5J H04R 3/04 3/12 Z H04S 1/00 D 8421-5H
Claims (3)
い周波数成分を通過させるハイパスフィルタと、低い周
波数成分を通過させるローパスフィルタと、前記ハイパ
スフィルタを通過した高い周波数成分を用いて残響成分
を生成する残響成分生成手段と、前記ローパスフィルタ
を通過した低い周波数成分の信号の振幅および位相を補
正するＦＩＲフィルタと、前記ハイパスフィルタの出力
と前記残響成分生成手段の出力と前記ＦＩＲフィルタの
出力を加算する加算器を備えた車載用音場補正装置。1. A high-pass filter that passes a high frequency component of a digital audio input signal, a low-pass filter that passes a low frequency component, and a reverberation component that generates a reverberation component using the high-frequency component that has passed through the high pass filter. Generating means, an FIR filter for correcting the amplitude and phase of the low frequency component signal passed through the low pass filter, an adder for adding the output of the high pass filter, the output of the reverberation component generating means and the output of the FIR filter. In-vehicle sound field correction device equipped with.
と残響成分生成手段の係数を入れ換える係数入れ換え器
とを備え、残響時間変更ボタンの指示によるＦＩＲフィ
ルタと残響成分生成手段の係数入れ換えを可能とするこ
とを特徴とした請求項１記載の車載用音場補正装置。2. A reverberation time change button, a coefficient transposition device for exchanging the coefficients of the FIR filter and the reverberation component generation means, and it is possible to exchange the coefficients of the FIR filter and the reverberation component generation means by the instruction of the reverberation time change button. The on-vehicle sound field correction device according to claim 1, wherein
と、残響時間選択手段と、ＦＩＲフィルタと残響成分生
成手段の係数を入れ換える係数入れ換え器とを備え、入
力信号に応じた残響時間を自動的に選択することを特徴
とした請求項１記載の車載用音場補正装置。3. A signal discriminating means for discriminating the type of an input signal, a reverberation time selecting means, a coefficient transposing device for exchanging coefficients of an FIR filter and a reverberation component generating means, and a reverberation time corresponding to an input signal is automatically provided. The in-vehicle sound field correction device according to claim 1, wherein the on-vehicle sound field correction device is selected selectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP05212670A JP3106788B2 (en) | 1993-08-27 | 1993-08-27 | In-vehicle sound field correction device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP05212670A JP3106788B2 (en) | 1993-08-27 | 1993-08-27 | In-vehicle sound field correction device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0764582A true JPH0764582A (en) | 1995-03-10 |
| JP3106788B2 JP3106788B2 (en) | 2000-11-06 |
Family
ID=16626459
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP05212670A Expired - Fee Related JP3106788B2 (en) | 1993-08-27 | 1993-08-27 | In-vehicle sound field correction device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3106788B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004506396A (en) * | 2000-08-14 | 2004-02-26 | レイク テクノロジー リミティド | Audio frequency response processing system |
| WO2006004099A1 (en) * | 2004-07-05 | 2006-01-12 | Pioneer Corporation | Reverberation adjusting apparatus, reverberation correcting method, and sound reproducing system |
| WO2006003957A1 (en) * | 2004-06-30 | 2006-01-12 | Pioneer Corporation | Reverberation adjustment device, reverberation adjustment method, reverberation adjustment program, recording medium containing the program, and sound field correction system |
| JP2015111859A (en) * | 2009-11-18 | 2015-06-18 | クゥアルコム・インコーポレイテッドＱｕａｌｃｏｍｍ Ｉｎｃｏｒｐｏｒａｔｅｄ | Delay techniques in active noise cancellation circuits or other circuits that perform filtering of decimated coefficients |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102476283B1 (en) | 2018-11-26 | 2022-12-09 | 미쓰비시덴키 가부시키가이샤 | Elevator door control device |
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1993
- 1993-08-27 JP JP05212670A patent/JP3106788B2/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004506396A (en) * | 2000-08-14 | 2004-02-26 | レイク テクノロジー リミティド | Audio frequency response processing system |
| US8009836B2 (en) | 2000-08-14 | 2011-08-30 | Dolby Laboratories Licensing Corporation | Audio frequency response processing system |
| JP4904461B2 (en) * | 2000-08-14 | 2012-03-28 | ドルビー ラボラトリーズ ライセンシング コーポレイション | Voice frequency response processing system |
| WO2006003957A1 (en) * | 2004-06-30 | 2006-01-12 | Pioneer Corporation | Reverberation adjustment device, reverberation adjustment method, reverberation adjustment program, recording medium containing the program, and sound field correction system |
| US8041046B2 (en) | 2004-06-30 | 2011-10-18 | Pioneer Corporation | Reverberation adjusting apparatus, reverberation adjusting method, reverberation adjusting program, recording medium on which the reverberation adjusting program is recorded, and sound field correcting system |
| WO2006004099A1 (en) * | 2004-07-05 | 2006-01-12 | Pioneer Corporation | Reverberation adjusting apparatus, reverberation correcting method, and sound reproducing system |
| US8023662B2 (en) | 2004-07-05 | 2011-09-20 | Pioneer Corporation | Reverberation adjusting apparatus, reverberation correcting method, and sound reproducing system |
| JP2015111859A (en) * | 2009-11-18 | 2015-06-18 | クゥアルコム・インコーポレイテッドＱｕａｌｃｏｍｍ Ｉｎｃｏｒｐｏｒａｔｅｄ | Delay techniques in active noise cancellation circuits or other circuits that perform filtering of decimated coefficients |
| US10115386B2 (en) | 2009-11-18 | 2018-10-30 | Qualcomm Incorporated | Delay techniques in active noise cancellation circuits or other circuits that perform filtering of decimated coefficients |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3106788B2 (en) | 2000-11-06 |
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