JPS61123898A - Tone maker - Google Patents
Tone makerInfo
- Publication number
- JPS61123898A JPS61123898A JP59245084A JP24508484A JPS61123898A JP S61123898 A JPS61123898 A JP S61123898A JP 59245084 A JP59245084 A JP 59245084A JP 24508484 A JP24508484 A JP 24508484A JP S61123898 A JPS61123898 A JP S61123898A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- frequency band
- voiced
- audio signal
- frequency
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
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、周波数帯域が制限された音声信号波形に、帯
域外の周波数成分を有する合成された信号波形を付加す
る事によシ、音声信号の音色を加工する音色加工装置に
関する。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention provides a method for improving the sound signal by adding a synthesized signal waveform having frequency components outside the frequency band to the sound signal waveform whose frequency band is limited. The present invention relates to a timbre processing device that processes timbre.
従来例の構成とその問題点
音声波形信号を伝送ないしは蓄積する際、伝送路によっ
て周波数帯域が制限される場合がある。 ゛例
えば電話回線による伝送や標本化の場合等がそれに当る
。その場合の再生音の品質（以下音質という）の限界は
上記周波数帯域によって規定される。このため、音質を
向上させる試みが従来より種々行われており、その際と
るべき手段として（１）周波数帯域を可能な限シ広ぐと
る。Conventional configurations and their problems When transmitting or storing audio waveform signals, the frequency band may be limited by the transmission path. ``For example, this applies to transmission over telephone lines and sampling. In this case, the limit of the quality of reproduced sound (hereinafter referred to as sound quality) is defined by the frequency band. For this reason, various attempts have been made to improve the sound quality, and the measures to be taken in this case are (1) widening the frequency band as much as possible;
（２）周波数帯域内で伝送路の周波数特性を人為的に制
御する。(2) Artificially control the frequency characteristics of the transmission path within the frequency band.
等の方法が行なわれている。しかし、いずれの方法も周
波数帯域に限界があるので十分な音質向上を得ることが
できなかった。Such methods are being used. However, since each method has a limited frequency band, it has not been possible to obtain a sufficient improvement in sound quality.
発明の目的
本発明は帯域制限された音声信号に対して周波数帯域外
の信号を新たに合成し、これを付加して音声信号の音色
を加工する事により、音質向上を図る事を目的とする。Purpose of the Invention The purpose of the present invention is to improve sound quality by newly synthesizing a signal outside the frequency band for a band-limited audio signal and adding this to process the timbre of the audio signal. .
発明の構成
本発明は、有声／無声パラメータ、及び有声の場合のピ
ッチパラメータならびに振幅値パラメータを入力して、
有声の場合は所定の振幅値及びピッチ周期の調波構造を
有する信号（例えばインパルス等）を、無声の場合は白
色雑音等スペクトルの平たんな信号を発生する手段、及
び上記信号より伝送路の周波数帯域の成分を除去しかつ
必要な帯域幅の信号を得る帯域阻止形又は低域阻止形フ
ィルタ、及び上記フィルタより出力された信号と帯域制
限された音声信号とを加算する手段とからなる。Structure of the Invention The present invention inputs voiced/unvoiced parameters, pitch parameters and amplitude value parameters in the case of voiced,
Means for generating a signal (such as an impulse) having a harmonic structure with a predetermined amplitude value and pitch period in the case of voiced signals, or a signal with a flat spectrum such as white noise in the case of unvoiced cases, and It consists of a band-stopping or low-band-stopping filter that removes components in the frequency band and obtains a signal with the required bandwidth, and means for adding the signal output from the filter and the band-limited audio signal.
実施例の説明 以下、図面を用いて本発明の詳細な説明する。Description of examples Hereinafter, the present invention will be explained in detail using the drawings.
図は本発明の一実施例の構成を示すブロック図である。The figure is a block diagram showing the configuration of an embodiment of the present invention.
図において、１は音質向上用として付加すべき信号と基
礎となる信号を発生する信号発生装置である。この信号
発生装置は処理されるべき周波数帯域制限された音声信
号Ｂをあらかじめ区切られた時間区間（以下フレームと
いう）毎に分析して得られた有声／無声パラメータＶ／
ＵＶ、有声時に抽出されたピッチパラメータＰ１および
振幅パラメータＧを入力信号とし、有声／無声パラメー
タＶ／ＵＶが「有声」の時はそのフレームにおけるピッ
チ周波数およびその高調波成分を含み所定の振幅を有す
るインパルス列を発生し、「無声」のときは所定の振幅
の白色雑音を出力信号人として発生する。この場合、イ
ンパルス列の高調波成分けもとの周波数帯域より高い周
波数でサンプリングすることにより得られる。２は上記
の周波数帯域制限された音声信号Ｂの周波数帯域区間を
阻止域としてもつフィルタで、信号発生装置１の出力信
号人から周波数帯域制限された音声信号Ｂの周波数帯域
成分を除去した信号Ｃを得る。したがって信号Ｃは音声
信号Ｂの周波数帯域より高い周波数成分をもつ。この信
号Ｃと音声信号Ｂとを加 １″算器３で加算
することにより、帯域制限された音声信号Ｂにその周波
数より高い周波数成分の信号Ｃが付加された信号りが得
られる。この信号りは音声信号Ｂの音質を向上させた音
声信号として出力される。In the figure, reference numeral 1 denotes a signal generating device that generates a signal to be added for improving sound quality and a basic signal. This signal generating device analyzes voiced/unvoiced parameters V/
UV, pitch parameter P1 and amplitude parameter G extracted when voiced are input signals, and when voiced/unvoiced parameter V/UV is "voiced", it includes the pitch frequency and its harmonic components in that frame and has a predetermined amplitude. It generates an impulse train, and when it is "silent", it generates white noise of a predetermined amplitude as an output signal. In this case, the harmonic component of the impulse train is obtained by sampling at a higher frequency than the original frequency band. Reference numeral 2 denotes a filter having a stopband in the frequency band section of the frequency band limited audio signal B, which removes the frequency band components of the frequency band limited audio signal B from the output signal of the signal generator 1. get. Therefore, signal C has a frequency component higher than the frequency band of audio signal B. By adding this signal C and audio signal B in the adder 3, a signal is obtained in which a signal C having a frequency component higher than that frequency is added to the band-limited audio signal B. This signal This is output as an audio signal with improved sound quality of audio signal B.
なお、信号人、すなわちインパルス列もしくは白色雑音
の振幅値は、音声信号Ｂの帯域と信号Ｃの帯域の境界に
おけるスペクトル値が等しくなるように調整される。Note that the amplitude value of the signal person, that is, the impulse train or the white noise, is adjusted so that the spectrum value at the boundary between the audio signal B band and the signal C band becomes equal.
発明の詳細
な説明したとおり、本発明によれば周波数帯域の制限さ
れた音声信号に帯域外の信号を合成により発生し付加す
る事により、音色の加工が可能となシ、音質向上の効果
が期待できる。As described in detail, according to the present invention, by synthesizing and adding an out-of-band signal to an audio signal with a limited frequency band, it is possible to process the timbre and improve the sound quality. You can expect it.
図は本発明による音色加工装置の一実施例を示すブロッ
ク図である。
１・・・・・・信号発生装置、２・・・・・・フィルタ
、３・・・・・・加算器。
代理人の氏名 弁理士 中 尾 敏 男 ほか１名／
ｚThe figure is a block diagram showing an embodiment of a tone processing device according to the present invention. 1...Signal generator, 2...Filter, 3...Adder. Name of agent: Patent attorney Toshio Nakao and 1 other person/
z
Claims (1)
時間区間毎に分析して得られた、有声／無声パラメータ
、及び、有声時に抽出されたピッチパラメータならびに
振幅パラメータを入力し、有声時には、当該時間区間に
おけるピッチ周波数及びその高調波成分を含む信号を発
生し、無声時には擬似雑音信号を発生する信号発生手段
と、上記音声信号の周波数帯域の区間を阻止域としても
つフィルタと、上記信号発生手段より発生された信号を
上記フィルタに通過させて得られた信号及び上記音声信
号を加算する手段とを有する事を特徴とする音色加工装
置。Input the voiced/unvoiced parameters obtained by analyzing the frequency band limited audio signal for each pre-divided time interval, as well as the pitch parameter and amplitude parameter extracted when voiced, and when voiced, the corresponding time interval a signal generating means that generates a signal containing a pitch frequency and its harmonic components, and generates a pseudo-noise signal when there is no voice; a filter having a stopband in the frequency band of the voice signal; and a signal generated by the signal generating means. 1. A timbre processing device comprising means for adding a signal obtained by passing the filtered signal through the filter and the audio signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59245084A JPS61123898A (en) | 1984-11-20 | 1984-11-20 | Tone maker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59245084A JPS61123898A (en) | 1984-11-20 | 1984-11-20 | Tone maker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61123898A true JPS61123898A (en) | 1986-06-11 |
Family
ID=17128363
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59245084A Pending JPS61123898A (en) | 1984-11-20 | 1984-11-20 | Tone maker |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61123898A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63127300A (en) * | 1986-11-18 | 1988-05-31 | 株式会社リコー | Voice silence compression system |
| WO1999030315A1 (en) * | 1997-12-08 | 1999-06-17 | Mitsubishi Denki Kabushiki Kaisha | Sound signal processing method and sound signal processing device |
-
1984
- 1984-11-20 JP JP59245084A patent/JPS61123898A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63127300A (en) * | 1986-11-18 | 1988-05-31 | 株式会社リコー | Voice silence compression system |
| WO1999030315A1 (en) * | 1997-12-08 | 1999-06-17 | Mitsubishi Denki Kabushiki Kaisha | Sound signal processing method and sound signal processing device |
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