CN1953058A - Circuit structure for sound source processing and processing method thereof - Google Patents
Circuit structure for sound source processing and processing method thereof Download PDFInfo
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- CN1953058A CN1953058A CNA2005101162150A CN200510116215A CN1953058A CN 1953058 A CN1953058 A CN 1953058A CN A2005101162150 A CNA2005101162150 A CN A2005101162150A CN 200510116215 A CN200510116215 A CN 200510116215A CN 1953058 A CN1953058 A CN 1953058A
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Abstract
This invention discloses a audio process circuit structure and its process method, which is suitable for one image device and comprises one audio signal test unit, one gate logic circuit unit, one gate logic circuit unit and one audio amplifying process unit, wherein, the test unit comprises one couple capacitor, one signal amplifying circuit, one direct calibration circuit, one charging circuit and one switch circuit; the test unit can convert different vibration range and signal into one high or low direct current logic calibration signals.
Description
Technical field
The present invention's a kind of source of sound treatment circuit structure and disposal route thereof are applicable on the AV device.In this source of sound treatment circuit structure, set up a sound source signal detecting unit especially, so as at the undistorted effective filtering noise and really keep its quiet effect still down of the voice output power that does not influence this AV device and sound source signal.
Background technology
See also Fig. 1, this figure is existing a kind of source of sound treatment circuit structural representation.Source of sound treatment circuit structure among the figure comprises a low pass filter unit 11, an audio frequency magnification processing 12 and a loudspeaker unit 13.Wherein, low pass filter unit 11 is when being noise as input sound source signal 111, be used for the amplitude of noise attenuation and the usefulness of frequency, audio frequency magnification processing 12 then provides the usefulness of sound source signal 112 amplifying signals and receiving system mute signal 121, and audio frequency magnification processing 12 also can provide a source of sound amplifying signal 122 to loudspeaker unit 13.
And strengthen explanation input sound source signal 111 by Fig. 1 and can be a sound signal or a noise, when source of sound treatment circuit structure there is no input one sound signal, because the relation of the circuit characteristic of source of sound treatment circuit structure, the inside of this source of sound treatment circuit structure still can produce the minimum little signal of an amplitude and frequency, and this minimum little signal is a noise.Noise exports audio frequency magnification processing 12 to after doing the appropriateness decay via low pass filter unit 11 again, and audio frequency magnification processing 12 is resent to loudspeaker unit 13 with the noise amplification.Be actually existence by above-mentioned this noise that may be obvious that, noise eliminating do not fallen because of the processing of low pass filter unit 11.
Relend by Fig. 1 and be illustrated, noise suppression mode in the past, though be the amplitude and the frequency of coming noise attenuation by the low pass filter unit 11 in the source of sound treatment circuit structure, yet, this kind way has influenced the output power of sound source signal 112 real required in the source of sound treatment circuit structure also, and the powerful sound source signal 112 of output is very important for source of sound treatment circuit structure.Yet, no matter be the noise that caused by source of sound treatment circuit inside configuration or the sound signal that is produced during by source of sound treatment circuit structure operate as normal, all be import sound source signal 111 via same low pass filter unit 11 to do and export sound source signal 112 again to audio frequency magnification processing 12 after appropriateness decays.But easily make 111 distortions of input sound source signal by this kind practice, and the sound source signal 112 that audio frequency magnification processing 12 is imported also will be the sound signal after decay, and so loudspeaker unit 13 is also at last because of exporting the message quality that a beautiful powerful sound source signal 112 reduces source of sound treatment circuit structure.
Actually, when source of sound treatment circuit structural requirement one enlarges volume, because noise is to exist really, even when the absence of audio signal, noise also can be worked constantly via the audio frequency magnification processing, and will hear that loudspeaker unit exports the noise behind amplification of volume.Whereby, for solving this source of sound treatment circuit structure when not having the input sound source signal, the noise that loudspeaker unit produced, the inventor studies in many ways and designs this source of sound treatment circuit structure, develops the sound source signal detecting unit of this source of sound treatment circuit structure.Represent sound signal or noise by the high or low DCL position calibration signal that this sound source signal detecting unit is sent, and when noise produces, in time send a quiet audio frequency magnification processing that controls signal to, so, suitably to close the audio frequency magnification processing, forbid that noise exports loudspeaker unit to, and in this way as above-mentioned problem settling mode and foundation.
Summary of the invention
The purpose of this invention is to provide a kind of source of sound treatment circuit structure and disposal route thereof, be applicable on the AV device, source of sound treatment circuit structure and is set up a sound source signal detecting unit in this source of sound treatment circuit structure except that comprising existing audio frequency magnification processing and loudspeaker unit.After the sound source signal detecting unit receives an external sound source signal, provide again at least one high or low DCL position calibration signal to next stage or the gate logic unit, and or the gate logic unit AND unit of one logical signal to next stage is provided again, after logical signal and the quiet control signal of an external system have been integrated in the AND unit, in time send a quiet audio frequency magnification processing that controls signal to, so, suitably to close the audio frequency magnification processing, the noise that allows source of sound treatment circuit structure be produced must not be exported by the audio frequency magnification processing.
Above-mentioned sound source signal detecting unit is divided into two major parts, and one is testing circuit, and another is an on-off circuit.Wherein, this testing circuit comprises a coupling capacitance, a signal amplification circuit, the accurate correcting circuit in a direct current position and charging circuit.Testing circuit is by a coupling capacitance, with the d-c component filtering of an external sound source signal of input.With this external sound source signal through the d-c component filtering, promptly little signal signal inputs to signal amplification circuit again, little signal signal is carried out action that little signal amplifies after, promptly produce a little signal signal amplifying signal.Again because of the influence of the circuit characteristic of signal amplification circuit, the position standard of this little signal signal amplifying signal has been offset, and has allowed source of sound treatment circuit structure can't correctly judge the working point, place of this little signal signal amplifying signal.Therefore, but the position standard of utilizing the accurate correcting circuit in a direct current position will be offset the little signal signal amplifying signal of working point, place retract on the source of sound treatment circuit structure judgment task point, and produce a correction bit calibration signal.Then, via a charging circuit correction bit calibration signal is changed into different DC voltage again, and export a high or low DCL position calibration signal, can allow the on-off circuit of next stage reach out (ON) or close the action of (OFF).
Circuit operation characteristic by above-mentioned sound source signal detecting unit can find, when a sound signal was imported, testing circuit can obtain a higher amplitude and the input signal of frequency, and makes the next stage on-off circuit export a high DCL position calibration signal.Comparatively speaking, when a noise was imported, testing circuit can obtain a lower amplitude and the input signal of frequency, and made next stage on-off circuit output one low DCL position calibration signal.So far can learn that the high DCL position calibration signal of sound source signal detecting unit output is represented the sound signal input, and the low DCL position calibration signal of sound source signal detecting unit output is represented the noise input.External system mute signal in that this high or low DCL position calibration signal can allow back level or gate logic unit and AND unit and the source of sound treatment circuit structure is made a suitable logical process, and allows the audio frequency magnification processing in time obtain a quiet control signal.This quiet control signal can allow the audio frequency magnification processing suitably open and close, meaning is promptly when noise takes place, the audio frequency magnification processing is closed, and so effectively management and control is to improve loudspeaker unit in the input of absence of audio signal, and noise also excludes together.
Further understand and understanding for enabling technical characterictic of the present invention and the effect reached had, hereinafter will be elaborated to preferred embodiment of the present invention in conjunction with the accompanying drawings.
Description of drawings
Fig. 1 is existing a kind of source of sound treatment circuit structural representation;
Fig. 2 is according to a kind of source of sound treatment circuit structural representation of the present invention;
Fig. 3 is according to a kind of sound source signal detecting unit synoptic diagram of the present invention;
Fig. 4 is according to a kind of testing circuit synoptic diagram of the present invention;
Fig. 5 is according to a kind of on-off circuit synoptic diagram of the present invention;
Fig. 6 is according to a kind of source of sound treatment circuit synoptic diagram of the present invention; And
Fig. 7 is according to a kind of sound source processing method process flow diagram of the present invention.
Embodiment
See also Fig. 2, this figure is according to a kind of source of sound treatment circuit structural representation of the present invention.Source of sound treatment circuit structure and is set up a sound source signal detecting unit 21, one or a gate logic unit 22 and an AND unit 23 in this source of sound treatment circuit structure except that comprising existing audio frequency magnification processing 12 and loudspeaker unit 13.Sound source signal detecting unit 21 receives sound source signal 211,212, and bright this sound source signal 211,212 of voicing of being eager to excel can be a sound signal or a noise.And with sound source signal 211,212 by after the processing of sound source signal detecting unit 21, and provide source of sound detection signal 213,214 to next stage or gate logic unit 22.Source of sound detection signal 213,214 via or the logical process of gate logic unit 22 after, and provide and integrate the AND unit 23 of source of sound detection signal 221 to next stage.After will integrating system's mute signal 121 in source of sound detection signal 221 and the source of sound treatment circuit structure again both delivering to AND unit 23 and make logical process, it provides a quiet control signal 231 to audio frequency magnification processing 12.Therefore, audio frequency magnification processing 12 suitably opens and closes by this quiet control signal 231, meaning is promptly when sound source signal 211,212 is a noise, then the audio frequency magnification processing is closed, stop to export source of sound amplifying signal 122 to loudspeaker unit 13, when sound source signal 211,212 was a sound signal, then the audio frequency magnification processing was opened, and output source of sound amplifying signal 122 is to loudspeaker unit 13.
See also Fig. 3, it is according to a kind of sound source signal detecting unit synoptic diagram of the present invention.Wherein, this sound source signal detecting unit 21 comprises two groups of testing circuits 36 and on-off circuit 35.This testing circuit 36 comprises a coupling capacitance 31, a signal amplification circuit 32, the accurate correcting circuit 33 in a direct current position and a charging circuit 34.After sound source signal detecting unit 21 receives sound source signal 211 and 212, relend the high DCL position calibration signal of being sent by sound source signal detecting unit 21 and represent sound signal, and the low DCL position calibration signal that sound source signal detecting unit 21 is sent is represented noise.From the above mentioned, meaning is that sound source signal detecting unit 21 is sent out source of sound detection signal 213 and 214 to next stage.
See also Fig. 4, it is according to a kind of testing circuit synoptic diagram of the present invention.Can realize the function of testing circuit 36 according to the circuit structure of Fig. 4, wherein, testing circuit 36 comprises two two- carrier transistors 465 and 467, two PN junction rectifiers 470 and 463,464,466 and 468, four capacitors 461,462,469 and 472 of 471, four carbon resistors.Among Fig. 4, after testing circuit 36 received sound source signal 211 and 212, point detection signal 41 places were because of the filtering by capacitor 461, so can measure a little signal signal.Point detection signal 42 places are because of the amplification by transistor 465, so can measure a little signal signal amplifying signal.Point detection signal 43 places are because of the feedback voltage skew by transistor 467, so can measure the little signal signal amplifying signal of an accurate skew.Point detection signal 44 places are because of the shaping by capacitor 469, so can measure a correction bit calibration signal.Point detection signal 45 places are because of the charge circuit by diode 470, diode 471 and capacitor 472 threes, so can measure a direct current logic level signal.Then, testing circuit 36 provides this DCL position calibration signal to next stage.
See also Fig. 5, it is according to a kind of on-off circuit synoptic diagram of the present invention.Can realize the function of on-off circuit 35 according to the circuit structure of Fig. 5, wherein, on-off circuit 35 has comprised two two-carrier transistors, four carbon resisters.Among Fig. 5, when on-off circuit 35 received a higher DCL position calibration signal 361, its on-off circuit 35 can pull into a high DCL position calibration signal with source of sound detection signal 213,214.On the contrary, when on-off circuit 35 received a lower DCL position calibration signal 361, its on-off circuit 35 can pull into source of sound detection signal 213,214 a low DCL position calibration signal.
See also Fig. 6, it is according to a kind of source of sound treatment circuit synoptic diagram of the present invention.According to shown in Figure 6, this figure intactly realizes the source of sound treatment circuit structure of Fig. 1.And with sound source signal 211,212 by after the processing of sound source signal detecting unit 21, and provide source of sound detection signal 213,214 to next stage or gate logic unit 22.Source of sound detection signal 213,214 via or the logical process of gate logic unit 22 after, and provide and integrate the AND unit 23 of source of sound detection signal 221 to next stage.After will integrating system's mute signal 121 in source of sound detection signal 221 and the source of sound treatment circuit structure again both delivering to AND unit 23 and make logical process, provide a quiet control signal 231 to audio frequency magnification processing 12.Therefore, audio frequency magnification processing 12 suitably opens and closes by this quiet control signal 231, meaning is promptly when sound source signal 211,212 is a noise, then audio frequency magnification processing 12 is closed, stop to export source of sound amplifying signal 122 to loudspeaker unit 13, when sound source signal 211,212 was a sound signal, then audio frequency magnification processing 12 was opened, and output source of sound amplifying signal 122 is to loudspeaker unit 13.Wherein, sound source signal detecting unit 21 comprises two groups of testing circuits 36 and on-off circuit 35.When on-off circuit 35 received a higher DCL position calibration signal 361, its on-off circuit 35 can pull into a high DCL position calibration signal with source of sound detection signal 213,214.On the contrary, when on-off circuit 35 received a lower DCL position calibration signal 361, its on-off circuit 35 can pull into source of sound detection signal 213,214 a low DCL position calibration signal.Meaning promptly needs only less than 0.7 volt when DCL position calibration signal 361, and 213,214 of source of sound detection signals are output as 0 volt, therefore, and these sound source signal detecting unit 21 very effective differentiation sound signal of energy or noises, and give suitable control.
See also Fig. 7, it is according to a kind of sound source processing method process flow diagram of the present invention.One sound source signal detecting unit S71 in AV device is set, and the sound source signal detecting unit provides at least one high or low DCL position calibration signal S72 after receiving an external sound source signal.Be provided with one or gate logic unit S73 in AV device, and or the gate logic unit provide a logical signal S74 after receiving high or low DCL position calibration signal.One AND unit S75 in AV device is set, and provides a quiet control signal S76 behind AND unit receive logic signal and the reception one external system mute signal.One audio frequency magnification processing S77 in AV device is set, and the audio frequency magnification processing receives quiet control signal, export a voice signal S78 to forbid the audio frequency magnification processing in good time.By above-mentioned flow process, can effectively differentiate sound signal or noise, so to reach the function of sound source signal detecting unit.
The above only is an illustrative, but not is restrictive.Anyly do not break away from spirit of the present invention and, all should be contained in accompanying the application's claim scope the modification or the change of its equivalence of carrying out.
Claims (14)
1. a source of sound treatment circuit structure is applicable to an AV device, and this source of sound treatment circuit structure comprises at least:
One sound source signal detecting unit, it provides at least one high or low DCL position calibration signal after receiving an external sound source signal;
One or the gate logic unit, it provides a logical signal after receiving this high or low DCL position calibration signal;
One AND unit provides a quiet control signal after it receives this logical signal and receives an external system mute signal; And
One audio frequency magnification processing after it receives this quiet control signal, forbids that this audio frequency magnification processing exports a voice signal.
2, source of sound treatment circuit structure as claimed in claim 1 is characterized in that this sound source signal detecting unit comprises at least:
One coupling condenser, it receives this external sound source signal;
One signal amplification circuit, its signal connects this coupling condenser;
The accurate correcting circuit in one direct current position, its signal connects this signal amplification circuit;
One charging circuit, its signal connect this accurate correcting circuit in direct current position; And
One on-off circuit, its signal connects this charging circuit.
3, source of sound treatment circuit structure as claimed in claim 1 is characterized in that this AV device is a LCD TV.
4, source of sound treatment circuit structure as claimed in claim 1 is characterized in that this external sound source signal is a sound source signal of this AV device.
5, source of sound treatment circuit structure as claimed in claim 1 is characterized in that this external system mute signal is a mute signal of this AV device.
6, source of sound treatment circuit structure as claimed in claim 2 is characterized in that this coupling condenser provides a little signal signal.
7, source of sound treatment circuit structure as claimed in claim 6 is characterized in that this signal amplification circuit receives this little signal signal and a little signal signal amplifying signal is provided.
8, source of sound treatment circuit structure as claimed in claim 7 is characterized in that the accurate correcting circuit in this direct current position receives this little signal signal amplifying signal and a correction bit calibration signal is provided.
9, source of sound treatment circuit structure as claimed in claim 8 is characterized in that this charging circuit receives this correction bit calibration signal and a direct current logic level signal is provided.
10, source of sound treatment circuit structure as claimed in claim 9 is characterized in that this on-off circuit receives this DCL position calibration signal.
11, a kind of sound source processing method is applicable to an AV device, and this sound source processing method comprises at least:
One sound source signal detecting unit is set in this AV device, and this sound source signal detecting unit provides at least one high or low DCL position calibration signal after receiving an external sound source signal;
Be provided with one or the gate logic unit in this AV device, and should or the gate logic unit provide a logical signal after receiving this high or low DCL position calibration signal;
One AND unit is set in this AV device, and this AND unit provides a quiet control signal after receiving this logical signal and receiving an external system mute signal; And
One audio frequency magnification processing is set in this AV device, and this this quiet control signal of audio frequency magnification processing reception, a voice signal exported to forbid this audio frequency magnification processing in good time.
12, sound source processing method as claimed in claim 11 is characterized in that also providing a LCD TV as this AV device.
13, sound source processing method as claimed in claim 11 is characterized in that also providing a sound source signal of this AV device as this external sound source signal.
14, sound source processing method as claimed in claim 11 is characterized in that also providing a mute signal of this AV device as this external system mute signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101162150A CN100543841C (en) | 2005-10-21 | 2005-10-21 | Source of sound treatment circuit structure and disposal route thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101162150A CN100543841C (en) | 2005-10-21 | 2005-10-21 | Source of sound treatment circuit structure and disposal route thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1953058A true CN1953058A (en) | 2007-04-25 |
| CN100543841C CN100543841C (en) | 2009-09-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005101162150A Expired - Fee Related CN100543841C (en) | 2005-10-21 | 2005-10-21 | Source of sound treatment circuit structure and disposal route thereof |
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| CN (1) | CN100543841C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107483734A (en) * | 2017-08-18 | 2017-12-15 | 广东欧珀移动通信有限公司 | volume adjusting method, device, terminal device and storage medium |
| CN111355854A (en) * | 2020-03-16 | 2020-06-30 | 青岛中加特电气股份有限公司 | Voice transmission device, system and use method thereof |
| CN113450835A (en) * | 2021-06-04 | 2021-09-28 | 佛吉亚歌乐电子(丰城)有限公司 | Method, equipment and storage medium for optimizing vehicle-mounted central control noise-free background noise |
-
2005
- 2005-10-21 CN CNB2005101162150A patent/CN100543841C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107483734A (en) * | 2017-08-18 | 2017-12-15 | 广东欧珀移动通信有限公司 | volume adjusting method, device, terminal device and storage medium |
| CN111355854A (en) * | 2020-03-16 | 2020-06-30 | 青岛中加特电气股份有限公司 | Voice transmission device, system and use method thereof |
| CN113450835A (en) * | 2021-06-04 | 2021-09-28 | 佛吉亚歌乐电子(丰城)有限公司 | Method, equipment and storage medium for optimizing vehicle-mounted central control noise-free background noise |
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| Publication number | Publication date |
|---|---|
| CN100543841C (en) | 2009-09-23 |
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Granted publication date: 20090923 Termination date: 20121021 |