CN201215998Y - Audio processor having automatic gain control function - Google Patents
Audio processor having automatic gain control function Download PDFInfo
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- CN201215998Y CN201215998Y CNU2008200566495U CN200820056649U CN201215998Y CN 201215998 Y CN201215998 Y CN 201215998Y CN U2008200566495 U CNU2008200566495 U CN U2008200566495U CN 200820056649 U CN200820056649 U CN 200820056649U CN 201215998 Y CN201215998 Y CN 201215998Y
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- audio
- gain
- audio signal
- feedback circuit
- control function
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Abstract
The utility model relates to an audio processor with automatic gain control function, which comprises an audio signal amplifier, a detection circuit, a feedback circuit and a control switch, wherein the audio signal amplifier is used to amplify audio signals which are collected by an audio acquisition device, the detection circuit is used to detect signal gain of signals which are output by the audio signal amplifier, thereby detecting whether the gain of the audio signals which are amplified exceeds a preset value. The feedback circuit is used to weaken the gain of the audio signals which are collected by the audio acquisition device when the gain of the audio signals which are amplified is detected to exceed the preset value, the control switch is connected with the feedback circuit to control the switching of the feedback circuit, thereby being capable of achieving to control the gain of the audio signals which are collected in an appropriate range, further being capable of effectively avoiding having a farther and nearer feeling when other people hear the audio signals which is caused because the distance between a spokesman and an audio signal acquisition device which is a microphone and the like is different.
Description
Technical field
The utility model relates to the audio process with automatic gain control function.
Background technology
In the video conference field, audio process is as the terminal of acoustic processing, possessed intelligent functions such as echo and noise eliminating now, but at present, because speak to express some content when the participant tends to walk about in the meeting-place, the sound of microphone collection is exactly to change along with the variation of source of sound distance like this.Present audio process is handled handled audio signal will be along with the size of the sound of microphone collection and change, cause other people to have suddenly big or suddenly small sense listening to the sound of handling through audio process, this problem that therefore how to solve existing audio process existence has become the technical task that those skilled in the art need to be resolved hurrily in fact.
The utility model content
The purpose of this utility model is to provide a kind of audio process with automatic gain control function, with the gain controlling of the audio signal that realizes gathering within proper range, to avoid and audio signal that cause other people to hear has and far neglects near sense suddenly when the far and near different of audio signal sample devices such as spokesman's distance microphone.
The audio process that the utility model provides with automatic gain control function, it comprises: be used for audio signal amplifier that the audio signal that audio collecting device is gathered is amplified; Be used for the signal of described audio signal amplifier output is carried out whether the signal gain detection surpasses preset value through the gain of the audio signal of amplification with detection testing circuit; Be used for detecting the feedback circuit that gain through the audio signal of amplifying is weakened the gain of the audio signal of described audio collecting device collection when surpassing preset value when described testing circuit; Be connected with described feedback circuit with the control switch of the break-make of controlling described feedback circuit.
Preferably, described testing circuit can comprise triode, and described feedback circuit can adopt technotron drain-source level resistance to weaken the gain of audio signal, and described control switch can adopt four bidirectional switchs.
In sum, audio process with automatic gain control function of the present utility model by to the detection of the gain of the audio signal of audio signal sample device collection to regulate corresponding gain, and then with the gain controlling of the audio signal of gathering at proper range, can effectively avoid when the far and near different of audio signal sample devices such as spokesman's distance microphone and audio signal that cause other people to hear has and far neglects near sense suddenly.
Description of drawings
Fig. 1 is the circuit structure block diagram with audio process of automatic gain control function of the present utility model.
Embodiment
See also Fig. 1, the audio process with automatic gain control function of the present utility model mainly comprises: audio signal amplifier, audio signal amplifier, testing circuit, feedback circuit, and control switch.
Described audio signal amplifier is used for the audio signal that audio collecting device is gathered is amplified, and it can adopt power amplifier to realize, for example transistor etc.
Described testing circuit is used for signal with the output of described audio signal amplifier to carry out the gain that signal gain detects to detect through the audio signal of amplifying and whether surpasses preset value, in the present embodiment, described testing circuit can comprise triode, as model is that 9014 switch triode circuit is realized, triode becomes conducting by ending when the base stage of triode reaches conducting voltage, whether surpass preset value with this gain that detects audio signal, if do not surpass, then directly export the audio signal in the normal range (NR), if the gain of detected audio signal has surpassed preset value, then will insert feedback circuit through the audio signal of amplifying.
Described feedback circuit is used for the gain of the audio signal of described audio collecting device collection being weakened when surpassing preset value when described testing circuit detects gain through the audio signal of amplifying, in the present embodiment, it can adopt technotron drain-source level resistance to weaken the gain of audio signal, for example adopting model is the technotron of J176, and its drain-source level resistance depends on and grid voltage.
Described control switch is connected with described feedback circuit to control the break-make of described feedback circuit, usually audio process generally is the multiple signals inputs, whether each road needs the gain of audio signal is regulated and can be controlled by control switch, in the present embodiment, can to adopt four bidirectional switch integrated circuits be the break-make that CD4066B controls each road to described control switch.
In sum, audio process with automatic gain control function of the present utility model by the gain to the audio signal of gathering detect with the gain controlling of corresponding audio signal at a proper range, can avoid thus when the far and near different of audio signal sample devices such as spokesman's distance microphone and audio signal that cause other people to hear has and far neglects near sense suddenly.
Claims (4)
1. audio process with automatic gain control function is characterized in that comprising:
Be used for audio signal amplifier that the audio signal that audio collecting device is gathered is amplified;
Be used for the signal of described audio signal amplifier output is carried out whether the signal gain detection surpasses preset value through the gain of the audio signal of amplification with detection testing circuit;
Be used for detecting the feedback circuit that gain through the audio signal of amplifying is weakened the gain of the audio signal of described audio collecting device collection when surpassing preset value when described testing circuit;
Be connected with described feedback circuit with the control switch of the break-make of controlling described feedback circuit.
2. the audio process with automatic gain control function as claimed in claim 1 is characterized in that: described testing circuit comprises triode.
3. the audio process with automatic gain control function as claimed in claim 1 is characterized in that: described feedback circuit adopts technotron drain-source level resistance to weaken the gain of audio signal.
4. the audio process with automatic gain control function as claimed in claim 1 is characterized in that: described control switch adopts four bidirectional switchs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200566495U CN201215998Y (en) | 2008-03-27 | 2008-03-27 | Audio processor having automatic gain control function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200566495U CN201215998Y (en) | 2008-03-27 | 2008-03-27 | Audio processor having automatic gain control function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201215998Y true CN201215998Y (en) | 2009-04-01 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200566495U Expired - Lifetime CN201215998Y (en) | 2008-03-27 | 2008-03-27 | Audio processor having automatic gain control function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201215998Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011124053A1 (en) * | 2010-04-07 | 2011-10-13 | 中兴通讯股份有限公司 | Method for adjusting volume of power amplifier and system thereof |
| CN103050119A (en) * | 2012-12-30 | 2013-04-17 | 安徽科大讯飞信息科技股份有限公司 | Self-adaptive detection method for synchronism of lamplight/motor and sound |
| CN106357871A (en) * | 2016-09-29 | 2017-01-25 | 维沃移动通信有限公司 | Voice amplifying method and mobile terminal |
| CN111490739A (en) * | 2019-01-25 | 2020-08-04 | 杭州海康威视数字技术股份有限公司 | Device and equipment for amplifying audio signal |
| CN116683878A (en) * | 2023-08-02 | 2023-09-01 | 深圳市橙视科技发展有限公司 | Audio output control circuit and audio player |
-
2008
- 2008-03-27 CN CNU2008200566495U patent/CN201215998Y/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011124053A1 (en) * | 2010-04-07 | 2011-10-13 | 中兴通讯股份有限公司 | Method for adjusting volume of power amplifier and system thereof |
| CN103050119A (en) * | 2012-12-30 | 2013-04-17 | 安徽科大讯飞信息科技股份有限公司 | Self-adaptive detection method for synchronism of lamplight/motor and sound |
| CN106357871A (en) * | 2016-09-29 | 2017-01-25 | 维沃移动通信有限公司 | Voice amplifying method and mobile terminal |
| CN111490739A (en) * | 2019-01-25 | 2020-08-04 | 杭州海康威视数字技术股份有限公司 | Device and equipment for amplifying audio signal |
| CN111490739B (en) * | 2019-01-25 | 2023-09-26 | 杭州海康威视数字技术股份有限公司 | Device and equipment for amplifying audio signal |
| CN116683878A (en) * | 2023-08-02 | 2023-09-01 | 深圳市橙视科技发展有限公司 | Audio output control circuit and audio player |
| CN116683878B (en) * | 2023-08-02 | 2024-01-30 | 深圳市橙视科技发展有限公司 | Audio output control circuit and audio player |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: AVCON INFORMATION TECHNOLOGY CO., LTD. Free format text: FORMER NAME: SHANGHAI AVCON INFORMATION TECHNOLOGY CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 200433 Shanghai City, Yangpu District National Road No. 335 Patentee after: Information Technology Co., Ltd. Shanghai Avcon Address before: 200433 Shanghai City, Yangpu District National Road No. 335 Patentee before: Shanghai Avcon Information Technology Co., Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20090401 |