CN103475975A - Audio processing device - Google Patents
Audio processing device Download PDFInfo
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- CN103475975A CN103475975A CN 201210184292 CN201210184292A CN103475975A CN 103475975 A CN103475975 A CN 103475975A CN 201210184292 CN201210184292 CN 201210184292 CN 201210184292 A CN201210184292 A CN 201210184292A CN 103475975 A CN103475975 A CN 103475975A
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Abstract
The invention discloses an audio processing device. The audio processing device comprises a signal preprocessing unit used for adjusting amplitude of an external audio signal within a preset amplitude range and sending the external audio signal to an audio processing main chip unit, the audio processing main chip unit which is connected to the signal preprocessing unit and is used for audio gain adjustment control operation of the received audio signal and sending the audio signal to an audio power amplifier unit, and the audio power amplifier unit which is connected to the audio processing main chip unit and is used for amplifying the audio signal and sending the audio signal to a loudspeaker. According to the audio processing device disclosed by the invention, the signal preprocessing unit is additionally arranged at an input end of the audio signal, thus automatically optimizing the final audio output effect, effectively processing the audio signal, guaranteeing audio listening effect for users and being beneficial to enhance life quality and product use experience of users.
Description
Technical field
The present invention relates to the audio signal processing technique field, particularly relate to a kind of apparatus for processing audio.
Background technology
Along with the development of China's science and technology, the domestic electric appliances such as display, projecting apparatus, all-in-one, computer, television set, video camera, camera are more and more universal in people's daily life, become people's indispensable part of living.
Current electric equipment, generally have apparatus for processing audio as shown in Figure 1.Referring to Fig. 1, these electric equipments are in order to realize the broadcasting of sound, usually audio signal is input to audio frequency processing main chip unit (Scaler IC), by the audio frequency processing main chip, undertaken sending to an audio power amplifier unit amp after signal gain adjustment processing, by audio power amplifier unit (Sound Amp), audio signal is decoded after amplifying and exported to loud speaker (being loudspeaker) again, thereby finally sounded by loud speaker.
For existing apparatus for processing audio, if it is excessive that the volume of the electric equipments such as display is adjusted, it will be easily excessive being input to so the signal amplitude that the audio signal of audio frequency processing main chip cell S caler IC has, that is to say the maximum level value that easily causes this Audio Meter value to allow over audio frequency processing main chip cell S caler IC, thereby the audio signal that makes audio frequency processing main chip cell S caler IC export can distorted and occur cutting the top problem of dtmf distortion DTMF (be audio signal from waveform just just as mountain peak is reamed and is pushed up, this distortion is called as cuts the top distortion), thereby the sound serious distortion that causes loud speaker to play, badly influence user's sound audibility, the product that has reduced the user is used impression.
Therefore, in the urgent need to developing a kind of device, it can effectively be processed audio signal at present, prevents that sound serious distortion problem from appearring in audio signal when signal amplitude is excessive, guarantees user's sound audibility, strengthens user's quality of the life.
Summary of the invention
In view of this, the purpose of this invention is to provide a kind of apparatus for processing audio, it increases the signalization pretreatment unit by the input in audio signal, according to the different amplitude sizes of audio signal, corresponding carry out different processing operations, last output effect that can Automatic Optimal sound, the effective processing of realization to audio signal, guarantee user's sound audibility, be conducive to strengthen user's quality of the life and user's product use impression, be of great practical significance.
For this reason, the invention provides a kind of apparatus for processing audio, include signal pretreatment unit, audio frequency processing main chip unit, audio power amplifier unit and loud speaker, wherein:
The signal pretreatment unit, for receiving in real time the audio signal that outside music player is inputted, and adjust to the amplitude size of this audio signal in default amplitude range, then sends to audio frequency processing main chip unit;
Audio frequency processing main chip unit, be connected with the signal pretreatment unit, for after receiving the audio signal that described signal pretreatment unit sends, audio signal carried out to audio gain and adjust control operation, then sends to audio power amplifier unit;
Audio power amplifier unit, be connected with audio frequency processing main chip unit, for the audio signal to received, amplifies processing, then sends to loud speaker;
Loud speaker, be connected with audio power amplifier unit, for receiving the audio signal of amplifying through audio power amplifier unit, and according to the audio signal output sound of this amplification.
Wherein, described signal pretreatment unit will be greater than the audio frequency signal amplitude of default amplitude and compress processing, until within the amplitude of audio signal is positioned at and presets amplitude range; Otherwise described signal pretreatment unit will be less than the audio frequency signal amplitude of default amplitude and amplify processing, until within the amplitude of audio signal is positioned at and presets amplitude range.
Wherein, include at least one compressor in described signal pretreatment unit.
Wherein, include at least one amplifier in described Signal Pretreatment unit.
Wherein, also include at least one filter circuit, described filter circuit, between described audio power amplifier unit and loud speaker, carries out the filtering processing for the audio signal to not meeting the predeterminated frequency requirement.
Wherein, described filter circuit is low pass filter or high pass filter.
From above technical scheme provided by the invention, compared with prior art, the invention provides a kind of apparatus for processing audio, it increases the signalization pretreatment unit by the input in audio signal, different amplitude sizes according to audio signal, the processing operation that corresponding execution is different, last output effect that can Automatic Optimal sound, the effective processing of realization to audio signal, guarantee user's sound audibility, be conducive to strengthen user's quality of the life and user's product use impression, be of great practical significance.
On specific implementation, the present invention can arrange by the input increase in audio signal a compressor, maximum signal amplitudes to audio signal is compressed, realize the purpose of amplitude limit, thereby can prevent that audio signal from causing when signal amplitude is excessive cuts the top distortion, avoid finally occurring sound serious distortion problem, conscientiously ensure user's sound audibility.The use of compressor simultaneously, can also make the audio frequency signal amplitude that amplitude is less become large, makes the sound of broadcasting flat soft, strengthens the result of broadcast of audio bass.
The accompanying drawing explanation
Fig. 1 is the structural representation of existing a kind of apparatus for processing audio;
The structural representation that Fig. 2 is a kind of apparatus for processing audio provided by the invention;
The structural representation that Fig. 3 is a kind of apparatus for processing audio embodiment mono-provided by the invention;
The structural representation that Fig. 4 is a kind of apparatus for processing audio embodiment bis-provided by the invention.
Embodiment
In order to make those skilled in the art person understand better the present invention program, below in conjunction with drawings and embodiments, the present invention is described in further detail.
Referring to Fig. 2, the invention provides a kind of apparatus for processing audio, include signal pretreatment unit 201, audio frequency processing main chip cell S caler IC 202, audio power amplifier unit Sound Amp 203 and loud speaker 204, wherein:
Audio frequency processing main chip cell S caler IC 202, with signal pretreatment unit 201, be connected, for after receiving the audio signal that described signal pretreatment unit 201 sends, audio signal is carried out to audio gain and adjust control operation, then send to audio power amplifier unit 203;
Audio power amplifier unit Sound Amp 203, be connected with audio frequency processing main chip cell S caler IC 202, for the audio signal to received, amplifies processing, then sends to loud speaker 204;
In the present invention, on specific implementation, described outside music player can include but not limited to that MP3, MP4 and computer, panel computer etc. are at interior, any one or polytype device with music playback function.
It should be noted that, apparatus for processing audio provided by the present invention, be preferably and be installed on display, certainly, according to user's needs, can also be installed on the multiple appliance terminal that needs output sound such as computer, television set, video camera.
In the present invention, on specific implementation, described audio frequency processing main chip cell S caler IC 202 for example can chant the display master chip that the model of scientific and technological Novatek company exploitation is SE1179LMRDL-NT for connection, this integrated chip has the audio frequency processing capacity, can gain to the audio signal of input to adjust and control.
In the present invention, it should be noted that, described signal pretreatment unit 201 will be greater than the audio frequency signal amplitude of default amplitude and compress processing, until within the amplitude of audio signal is positioned at and presets amplitude range; Otherwise described signal pretreatment unit 201 will be less than the audio frequency signal amplitude of default amplitude and amplify processing, until within the amplitude of audio signal is positioned at and presets amplitude range.In the present invention, on specific implementation, referring to Fig. 3, can include at least one compressor 2011 in described signal pretreatment unit 201, the effect of compressor is to allow the signal amplitude out-put dynamic range of audio signal diminish, it can be so that fainter signal becomes large, and larger signal is diminished.Therefore, when the signal amplitude of the received audio signal of described signal pretreatment unit is excessive, by moving compressor wherein, can be compressed the maximum signal amplitudes of audio signal, realize the purpose of amplitude limit, can be so that the excessive signal of signal amplitude diminishes; And when the signal amplitude of the received audio signal of described signal pretreatment unit is too small, can be by the operation compressor, improve the amplitude of audio signal, make the faint signal of amplitude become large, thereby the use of compressor, can make the sound of broadcasting flat soft so that the less audio frequency signal amplitude of amplitude becomes large, strengthen the result of broadcast of audio bass.Therefore, the present invention arranges at least one compressor by increase, and last output effect that can Automatic Optimal sound is realized the effective processing to audio signal, can be so that the sound that the final audio signal of speaker plays back performance is better.
In the present invention, described Signal Pretreatment can also include at least one amplifier in unit, the audio signal that can be inputted outside music player (as MP3, MP4 etc.) put process after large export to as described in audio frequency processing main chip unit, so that the amplitude of audio signal to be provided, make the faint signal of amplitude become large, strengthen the result of broadcast of sound.
It should be noted that, for compressor of the present invention, once the audio signal level (being amplitude) of input has surpassed the threshold values that the user sets, compressor just will be started working, and too high incoming level is reduced.The result obtained like this is, when increasing the signal incoming level, can not cause signal output level to produce the increase (being subject to the restriction of pre-set threshold value) of equal amplitude, thereby avoid occurring that the Audio Meter value surpasses the problem of the maximum level value that audio frequency processing main chip cell S caler IC 202 allows when amplitude is excessive, effectively prevent audio signal when signal amplitude is excessive, occur cutting the top problem of dtmf distortion DTMF (audio signal from waveform just just as mountain peak reamed the top, this distortion is called as cuts the top distortion), avoid finally occurring sound serious distortion problem, conscientiously ensure user's sound audibility.
Certainly, in the present invention, also, according to user's needs, in described signal pretreatment unit, the parts that other are conducive to improve audio signal quality are set.
In addition, referring to Fig. 4, for apparatus for processing audio provided by the invention, can also include at least one filter circuit 205, described filter circuit 205, between described audio power amplifier unit 203 and loud speaker 204, carries out the filtering processing for the audio signal parts to not meeting the predeterminated frequency requirement.
On specific implementation, described filter circuit can be low pass filter or high pass filter.Wherein, described low pass filter carries out the attenuation filter processing for the part that audio signal frequency spectrum is exceeded to cut-off frequency (filter carries), and do not carry out the filtering processing lower than the part of cut-off frequency, thereby remove radio-frequency component unnecessary in audio signal, strengthen the bass composition, to drive the bass unit in loud speaker.And described high pass filter is not for being processed the part that audio signal frequency spectrum is exceeded to cut-off frequency (filter carries), and carry out the attenuation filter processing lower than the part of cut-off frequency, thereby remove low-frequency component unnecessary in audio signal, strengthen middle pitch and high pitch composition to drive middle pitch and the voice unit of loud speaker.
In the present invention, it should be noted that, described filter circuit can also be the filter of other types, is for example band pass filter, according to user's needs, specifically arranges.
It should be noted that, the present invention arranges one or more filter circuits (being for example low pass filter or high pass filter) by also increasing after described audio power amplifier unit Sound Amp 203, can adjust and revise the frequency distortion that audio power amplification module and any other parts produce the impact of audio signal, finally further improve the final sound tonequality of playing of loud speaker 204.
In sum, compared with prior art, the invention provides a kind of apparatus for processing audio, it increases the signalization pretreatment unit by the input in audio signal, different amplitude sizes according to audio signal, the processing operation that corresponding execution is different, last output effect that can Automatic Optimal sound, the effective processing of realization to audio signal, guarantee user's sound audibility, be conducive to strengthen user's quality of the life and user's product use impression, be of great practical significance.
On specific implementation, the present invention can arrange by the input increase in audio signal a compressor, maximum signal amplitudes to audio signal is compressed, realize the purpose of amplitude limit, thereby can prevent that audio signal from causing when signal amplitude is excessive cuts the top distortion, avoid finally occurring sound serious distortion problem, conscientiously ensure user's sound audibility; The use of compressor simultaneously, can also make the audio frequency signal amplitude that amplitude is less become large, makes the sound of broadcasting flat soft, strengthens the result of broadcast of audio bass.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (6)
1. an apparatus for processing audio, is characterized in that, includes signal pretreatment unit, audio frequency processing main chip unit, audio power amplifier unit and loud speaker, wherein:
The signal pretreatment unit, for receiving in real time the audio signal that outside music player is inputted, and adjust to the amplitude size of this audio signal in default amplitude range, then sends to audio frequency processing main chip unit;
Audio frequency processing main chip unit, be connected with the signal pretreatment unit, for after receiving the audio signal that described signal pretreatment unit sends, audio signal carried out to audio gain and adjust control operation, then sends to audio power amplifier unit;
Audio power amplifier unit, be connected with audio frequency processing main chip unit, for the audio signal to received, amplifies processing, then sends to loud speaker;
Loud speaker, be connected with audio power amplifier unit, for receiving the audio signal of amplifying through audio power amplifier unit, and according to the audio signal output sound of this amplification.
2. apparatus for processing audio as claimed in claim 1, is characterized in that, described signal pretreatment unit will be greater than the audio frequency signal amplitude of default amplitude and compress processing, until within the amplitude of audio signal is positioned at and presets amplitude range; Otherwise described signal pretreatment unit will be less than the audio frequency signal amplitude of default amplitude and amplify processing, until within the amplitude of audio signal is positioned at and presets amplitude range.
3. apparatus for processing audio as claimed in claim 1 or 2, is characterized in that, in described signal pretreatment unit, includes at least one compressor.
4. apparatus for processing audio as claimed in claim 3, is characterized in that, described Signal Pretreatment includes at least one amplifier in unit.
5. apparatus for processing audio as claimed in claim 1 or 2, it is characterized in that, also include at least one filter circuit, described filter circuit, between described audio power amplifier unit and loud speaker, carries out the filtering processing for the audio signal to not meeting the predeterminated frequency requirement.
6. apparatus for processing audio as claimed in claim 5, is characterized in that, described filter circuit is low pass filter or high pass filter.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201210184292 CN103475975A (en) | 2012-06-06 | 2012-06-06 | Audio processing device |
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| CN 201210184292 CN103475975A (en) | 2012-06-06 | 2012-06-06 | Audio processing device |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103888875A (en) * | 2014-03-26 | 2014-06-25 | 航天科技控股集团股份有限公司 | Built-in loudspeaker sound quality optimizing and amplifying device for vehicle travelling data recorder |
| CN104053094A (en) * | 2014-05-30 | 2014-09-17 | 歌尔声学股份有限公司 | Active band-stop filtering circuit |
| CN104460631A (en) * | 2014-12-15 | 2015-03-25 | 浙江大丰实业股份有限公司 | Distributed type stage sound effect unified allocation system |
| CN104703088A (en) * | 2014-12-15 | 2015-06-10 | 浙江大丰实业股份有限公司 | Unified allocation method of distributed stage sound system |
| CN108154887A (en) * | 2017-12-26 | 2018-06-12 | 上海展扬通信技术有限公司 | A kind of information processing method, device and terminal |
| CN108925014A (en) * | 2018-05-18 | 2018-11-30 | 安克创新科技股份有限公司 | A kind of light source brightness control method, system and equipment |
| WO2019128402A1 (en) * | 2017-12-26 | 2019-07-04 | 深圳Tcl新技术有限公司 | Method, system and storage medium for solving echo cancellation failure |
| CN111083406A (en) * | 2018-10-18 | 2020-04-28 | 浙江宇视科技有限公司 | Audio processing method and camera |
| CN112822608A (en) * | 2019-11-18 | 2021-05-18 | 北京小米移动软件有限公司 | Audio equipment |
-
2012
- 2012-06-06 CN CN 201210184292 patent/CN103475975A/en active Pending
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103888875A (en) * | 2014-03-26 | 2014-06-25 | 航天科技控股集团股份有限公司 | Built-in loudspeaker sound quality optimizing and amplifying device for vehicle travelling data recorder |
| CN104053094A (en) * | 2014-05-30 | 2014-09-17 | 歌尔声学股份有限公司 | Active band-stop filtering circuit |
| CN104053094B (en) * | 2014-05-30 | 2018-02-06 | 歌尔股份有限公司 | A kind of active rejector circuit |
| CN104460631A (en) * | 2014-12-15 | 2015-03-25 | 浙江大丰实业股份有限公司 | Distributed type stage sound effect unified allocation system |
| CN104703088A (en) * | 2014-12-15 | 2015-06-10 | 浙江大丰实业股份有限公司 | Unified allocation method of distributed stage sound system |
| CN108154887B (en) * | 2017-12-26 | 2021-03-12 | 上海展扬通信技术有限公司 | Information processing method and device and terminal |
| WO2019128402A1 (en) * | 2017-12-26 | 2019-07-04 | 深圳Tcl新技术有限公司 | Method, system and storage medium for solving echo cancellation failure |
| CN108154887A (en) * | 2017-12-26 | 2018-06-12 | 上海展扬通信技术有限公司 | A kind of information processing method, device and terminal |
| US11276416B2 (en) | 2017-12-26 | 2022-03-15 | Shenzhen Tcl New Technology Co., Ltd. | Method, system and storage medium for solving echo cancellation failure |
| CN108925014A (en) * | 2018-05-18 | 2018-11-30 | 安克创新科技股份有限公司 | A kind of light source brightness control method, system and equipment |
| CN111083406A (en) * | 2018-10-18 | 2020-04-28 | 浙江宇视科技有限公司 | Audio processing method and camera |
| CN111083406B (en) * | 2018-10-18 | 2022-06-14 | 浙江宇视科技有限公司 | Audio processing method and camera |
| CN112822608A (en) * | 2019-11-18 | 2021-05-18 | 北京小米移动软件有限公司 | Audio equipment |
| CN112822608B (en) * | 2019-11-18 | 2022-07-08 | 北京小米移动软件有限公司 | Audio equipment |
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Application publication date: 20131225 |