JPH04151907A - Automatic gain controller - Google Patents
Automatic gain controllerInfo
- Publication number
- JPH04151907A JPH04151907A JP27683990A JP27683990A JPH04151907A JP H04151907 A JPH04151907 A JP H04151907A JP 27683990 A JP27683990 A JP 27683990A JP 27683990 A JP27683990 A JP 27683990A JP H04151907 A JPH04151907 A JP H04151907A
- Authority
- JP
- Japan
- Prior art keywords
- level
- output signal
- signal level
- audio
- input signal
- 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
- 230000003321 amplification Effects 0.000 claims abstract description 8
- 238000003199 nucleic acid amplification method Methods 0.000 claims abstract description 8
- 238000010586 diagram Methods 0.000 description 4
- 230000005236 sound signal Effects 0.000 description 4
Landscapes
- Control Of Amplification And Gain Control (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は自動利得制御装置に関し、特に、音声信号を入
出力制御を行なう自動利得制御装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an automatic gain control device, and particularly to an automatic gain control device that performs input/output control of audio signals.
従来の音声信号を入出力制御を行なう装置では、様々な
音声入力レベルに対して常に適度な音声出力レベルに保
つことかできないため、音声レベルを手動で調整を行な
う必要があった。Conventional devices that perform input/output control of audio signals cannot always maintain an appropriate audio output level for various audio input levels, so it is necessary to manually adjust the audio level.
上述した従来の音声信号を入出力制御を行なう装置では
、音声入力レベルによってうるさかったり、聞き取れな
かったりという問題点があった。The above-described conventional devices that perform input/output control of audio signals have the problem that the audio may be noisy or inaudible depending on the audio input level.
本発明の自動利得制御装置は、音声入力信号を増幅する
手段と、音声出力信号レベルを決める値を設定する手段
と、音声入力信号の増幅率を決める手段とを具備し、音
声入力信号を設定値に自動的に増幅するように構成した
ことを特徴とする。The automatic gain control device of the present invention includes means for amplifying an audio input signal, means for setting a value that determines the audio output signal level, and means for determining an amplification factor of the audio input signal, and sets the audio input signal. It is characterized by being configured to automatically amplify the value.
次に、本発明について図面を参照して説明する。 Next, the present invention will be explained with reference to the drawings.
第１図は本発明の一実施例の構成図である。この図に示
す自動利得制御装置は、音声入力信号増幅器１と、音声
出力信号レベルと設定値とを比較し増幅率を決定する信
号レベル差分比較器２と、音声出力信号レベル値を設定
する音声出力信号レベル・値設定回路３とを具備する。FIG. 1 is a block diagram of an embodiment of the present invention. The automatic gain control device shown in this figure includes an audio input signal amplifier 1, a signal level difference comparator 2 that compares the audio output signal level with a set value and determines the amplification factor, and an audio signal amplifier that sets the audio output signal level value. The output signal level/value setting circuit 3 is provided.
第２図（ａＬ（ｂ）は第１図の動作を示す図である。音
声入力信号Ｘ （ｔ）が音声入力信号増幅器１（増幅率
に、）により音声出力信号Ｙ （ｔ）を得る。Ｙ （ｔ
）は信号レベル差分比較器２でＹＣｔ）のピークレベル
ＹＤと音声出力信号レベル値設定回路３で設定されてい
る値ＡＤと差分比較され、音声入力信号増幅器１の増幅
率に２を決定する。決定された増幅率をもとに音声入力
信号Ｘ （ｔ）以降の音声入力信号Ｘ（ｔ＋１）に対し
、音声出力信号レベル値設定回路３で設定されたレベル
値の音声出力信号Ｙ（ｔ＋１）を得ることができる。FIG. 2 (aL(b) is a diagram showing the operation of FIG. 1. The audio input signal X (t) obtains the audio output signal Y (t) by the audio input signal amplifier 1 (with an amplification factor). Y (t
) is differentially compared by the signal level difference comparator 2 with the peak level YD of YCt) and the value AD set by the audio output signal level value setting circuit 3, and the amplification factor of the audio input signal amplifier 1 is determined to be 2. Based on the determined amplification factor, an audio output signal Y(t+1) of the level value set by the audio output signal level value setting circuit 3 is generated for the audio input signal X(t+1) after the audio input signal X(t). can be obtained.
以上の動作により、様々な音声入力信号に対して設定さ
れたレベルの音声出力信号を得ることができる。Through the above operations, it is possible to obtain audio output signals at levels set for various audio input signals.
以上説明したように本発明は、音声入力レベルによって
うるさかったり、間き取れなかったりということなく、
音声出力信号レベルを常に適度のレベルに保つことがで
きるという効果を奏する。As explained above, the present invention does not become noisy or uninterrupted depending on the audio input level.
This has the effect that the audio output signal level can always be kept at an appropriate level.
【図面の簡単な説明】
第１図は本発明の一実施例の構成図、第２図は第１図の
動作を示す図である。
１・・・音声入力信号増幅器、２・・・信号レベル差分
比較器、３・・・音声出力信号レベル値設定回路。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram of an embodiment of the present invention, and FIG. 2 is a diagram showing the operation of FIG. 1. 1...Audio input signal amplifier, 2...Signal level difference comparator, 3...Audio output signal level value setting circuit.
Claims (1)
を決める値を設定する手段と、音声入力信号の増幅率を
決める手段とを具備し、音声入力信号を設定値に自動的
に増幅するように構成したことを特徴とする自動利得制
御装置。The apparatus includes means for amplifying an audio input signal, means for setting a value for determining an audio output signal level, and means for determining an amplification factor for the audio input signal, and is configured to automatically amplify the audio input signal to the set value. An automatic gain control device characterized by comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27683990A JPH04151907A (en) | 1990-10-16 | 1990-10-16 | Automatic gain controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27683990A JPH04151907A (en) | 1990-10-16 | 1990-10-16 | Automatic gain controller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04151907A true JPH04151907A (en) | 1992-05-25 |
Family
ID=17575125
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27683990A Pending JPH04151907A (en) | 1990-10-16 | 1990-10-16 | Automatic gain controller |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04151907A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5428512A (en) * | 1977-08-04 | 1979-03-03 | Matsushita Electric Ind Co Ltd | Automatic sound volume adjuster |
| JPS6058707A (en) * | 1983-09-09 | 1985-04-04 | Nec Corp | Automatic gain control circuit |
| JPS63217809A (en) * | 1987-03-06 | 1988-09-09 | Fujitsu Ltd | Automatic gain control circuit |
| JPH01286634A (en) * | 1988-05-13 | 1989-11-17 | Fujitsu Ltd | Voice agc device |
-
1990
- 1990-10-16 JP JP27683990A patent/JPH04151907A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5428512A (en) * | 1977-08-04 | 1979-03-03 | Matsushita Electric Ind Co Ltd | Automatic sound volume adjuster |
| JPS6058707A (en) * | 1983-09-09 | 1985-04-04 | Nec Corp | Automatic gain control circuit |
| JPS63217809A (en) * | 1987-03-06 | 1988-09-09 | Fujitsu Ltd | Automatic gain control circuit |
| JPH01286634A (en) * | 1988-05-13 | 1989-11-17 | Fujitsu Ltd | Voice agc device |
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