CN103702048B - Eliminate the method and system of television noise - Google Patents
Eliminate the method and system of television noise Download PDFInfo
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- CN103702048B CN103702048B CN201310755712.XA CN201310755712A CN103702048B CN 103702048 B CN103702048 B CN 103702048B CN 201310755712 A CN201310755712 A CN 201310755712A CN 103702048 B CN103702048 B CN 103702048B
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Abstract
This application discloses a kind of method and system for eliminating television noise, wherein eliminating the system of television noise includes audio-frequency amplifier, processor and audio frequency processing circuit.By processor before sending or stopping sending audio signal, the Jing Yin pin of audio-frequency amplifier is first controlled with the level state of standby pin, the sound channel allowed between audio-frequency amplifier and loudspeaker is closed, so that audio signal caused noise in transmit process can not be exported by loudspeaker, and with the effect of abating the noise.
Description
Technical field
The application is related to the Audio Signal Processing field of television set, and in particular to it is a kind of eliminate television noise method and be
System.
Background technology
General television equipment is in start or shutdown, or audio file in TV programme, music or film starts
When playing or exiting broadcasting, because volume moment from minimum volume is promoted to high-decibel volume either from high-decibel volume moment
When being down to amount of bass, the sound (POP sound) of " bang, bang " is often sent from loudspeaker.POP sounds are generally deposited in audio system
Noise, its generational verctor be some components in audio system when transmitting audio signal, in upper electricity or the mistake of power-off
Cheng Zhong, due to the sound caused by the moment impact of electric current.This noise can cause discomfort on auditory perception, and can influence
The normal of TV programme or film is watched and the normal listening of music, so as to reduce the audiovisual quality of television equipment.
The content of the invention
Technical problems to be solved in this application are to provide a kind of method and system for eliminating television noise, pass through processing
Before device sends audio signal, the working condition of audio-frequency amplifier is first controlled, leads to the sound between audio-frequency amplifier and loudspeaker
Road temporary close, and then caused noise in audio signal transmit process is not exported by loudspeaker, so as to solve
When television startup, shutdown or the audio file in TV programme, music or film commence play out or exit broadcasting, due to sound
The problem of amount moment becomes big or diminishes and produce noise.
In order to solve the above problems, this application discloses a kind of method for eliminating television noise, including：Control audio amplification
The Jing Yin pin of device and the level state of standby pin, make audio-frequency amplifier enter silent mode；Send audio signal；Conversion is treated
The level state of power traction pin；The level state of Jing Yin pin is changed after the first delay time, enters audio-frequency amplifier and plays
Pattern；Receive and handle audio signal；Audio signal after transmission processing；According to the level shape for exiting the Jing Yin pin of signal reply
State, the level state of standby pin is replied after the second delay time, audio-frequency amplifier is replied silent mode and stop hair
Send audio signal.
The application further discloses a kind of system for eliminating television noise, including at audio-frequency amplifier, processor and audio
Circuit is managed, audio-frequency amplifier has a Jing Yin pin and standby pin, and processor is coupled to Jing Yin pin and standby pin, and audio
Process circuit is coupled between processor and audio-frequency amplifier.Audio frequency processing circuit receives the audio sent with processing from processor
Signal, and transmit the audio signal after processing to audio-frequency amplifier, wherein processor and sending or stopping sending audio signal
Before, the level state of Jing Yin pin and standby pin is controlled, audio-frequency amplifier is entered silent mode.
Compared with prior art, the application can be obtained including following technique effect：
The method and system of the elimination television noise of the application, sending by processor or stopping sending audio signal
Before, the Jing Yin pin of audio-frequency amplifier and the level change sequential of standby pin are controlled, allows audio-frequency amplifier to be broadcast in audio signal
It is first temporary transient before putting or before exiting to close its sound channel between loudspeaker, produced by avoiding in audio signal transmit process
Noise from the volume such as loudspeaker or power amplifier output device export, so as to reach the effect of abating the noise.
Brief description of the drawings
Accompanying drawing described herein is used for providing further understanding of the present application, forms the part of the application, this Shen
Schematic description and description please is used to explain the application, does not form the improper restriction to the application.In the accompanying drawings：
Fig. 1 is the block schematic diagram of the system of the elimination television noise of the embodiment of the present application.
Fig. 2 is the method flow diagram of the elimination television noise of the application first embodiment.
Fig. 3 is the method flow diagram of the elimination television noise of the application second embodiment.
Embodiment
Presently filed embodiment is described in detail below in conjunction with drawings and Examples, and thereby how the application is applied
Technological means can fully understand and implement according to this to solve technical problem and reach the implementation process of technical effect.
Some vocabulary has such as been used to censure specific components among specification and claim.Those skilled in the art should
It is understood that hardware manufacturer may call same component with different nouns.This specification and claims are not with name
The difference of title is used as the mode for distinguishing component, but is used as the criterion of differentiation with the difference of component functionally.Such as logical
The "comprising" of piece specification and claim mentioned in is an open language, therefore should be construed to " include but do not limit
In "." substantially " refer in receivable error range, those skilled in the art can be described within a certain error range solution
Technical problem, basically reach the technique effect.In addition, " coupling " or " electric connection " one word herein comprising it is any directly and
The electric property coupling means connect.Therefore, if the first device of described in the text one is coupled to a second device, the first device is represented
The second device can be directly electrically coupled to, or described second is electrically coupled to indirectly by other devices or coupling means
Device.Specification subsequent descriptions is implement the better embodiment of the application, and so the description is to illustrate that the application's is general
For the purpose of principle, scope of the present application is not limited to.The protection domain of the application, which is worked as, regards appended claims institute defender
It is defined.
It should also be noted that, term " comprising ", "comprising" or its any other variant are intended to nonexcludability
Comprising so that process, method, commodity or system including a series of elements not only include those key elements, but also wrapping
Include the other element being not expressly set out, or also include for this process, method, commodity or system intrinsic want
Element.In the absence of more restrictions, the key element limited by sentence "including a ...", it is not excluded that wanted including described
Other identical element also be present in the process of element, method, commodity or system.
The application scenarios of the application
When turning off or on TV, or by watching television program, play music or during film, work as broadcast sound volume
Suddenly become amount of bass from louder volume in a short time, or from amount of bass suddenly become louder volume when, be applicable the application's
Scheme.
Embodiment describes
As shown in figure 1, the system 10 of the elimination television noise disclosed by the embodiment of the present application includes audio frequency processing circuit
110th, audio-frequency amplifier 120 and processor 130, audio frequency processing circuit 110 be coupled to audio-frequency amplifier 120 and processor 130 it
Between, to the audio signal transmitted by reception processing device 130, and after handling this audio signal, by the sound after processing
Frequency signal is sent to audio-frequency amplifier 120, in order to defeated from volume output device 140 (such as boombox or external power amplifier)
Go out sound.
Audio-frequency amplifier 120 is coupled to built in TV or external volume output device 140, audio-frequency amplifier 120 have
Have Jing Yin (mute) pin 121 and standby (standby) pin 122, audio-frequency amplifier 120 by Jing Yin pin 121 with it is standby
The level change of pin 122, switched between play mode and silent mode, to be turned on and off audio-frequency amplifier
Sound channel between 120 and loudspeaker, wherein when television startup, the Jing Yin pin 121 of audio-frequency amplifier 120 can be passed through
Level state with standby pin 122 is initializing set of the low level state as silent mode.Also, Jing Yin it ought draw
Pin 121 is high level with standby pin 122, and audio-frequency amplifier 120 is converted to broadcast state from mute state, so as to open
Sound channel, audio signal is allowed to be sent to volume output device 140 after treatment to export sound.
Processor 130 is respectively coupled to the Jing Yin pin 121 of audio frequency processing circuit 110, audio-frequency amplifier 120 with treating power traction
Pin 122.Processor 130 sends audio signal to audio frequency and video process circuit 110 to perform sound card driver.In addition,
Processor 130 is also to control the level state of the Jing Yin pin 121 of audio-frequency amplifier 120 and standby pin 122, and pass through
Jing Yin pin 121 and the SECO of the level change of standby pin 122, it can avoid caused in audio signal transmit process
Noise (POP sounds) is sent to volume output device 140 by audio-frequency amplifier 120 and played.
It is described further below by realization of some embodiments to the application method.As shown in Fig. 2 it is the application the
The method flow diagram of the elimination television noise of one embodiment, including：
Step S11, the Jing Yin pin of audio-frequency amplifier and the level state of standby pin are controlled, enters audio-frequency amplifier
Silent mode；
Step S12, send audio signal；
Step S13, change the level state of standby pin；
Step S14, the level state of Jing Yin pin is changed after the first delay time, enter audio-frequency amplifier and play mould
Formula；
Step S15, receive and handle audio signal；
Step S16, the audio signal after transmission processing；
Step S17, according to the level state for exiting the Jing Yin pin of signal reply；
Step S18, the level state of standby pin is replied after the second delay time, audio-frequency amplifier is replied Jing Yin mould
Formula；And
Step S19, stop sending audio signal.
Referring to Fig.1 and 2, in television startup, the setting control audio-frequency amplifier in first making program of processor 130
The level state of 120 Jing Yin pin 121 and standby pin 122, such as the level by Jing Yin pin 121 and standby pin 122
All it is arranged to low or is all arranged to high, allows audio-frequency amplifier 120 to carry out silent mode, and amplify using this state as audio
The default conditions (step S11) of device 120.Then, when playing audio file on TV, processor 130 sends audio signal (step
Rapid S12), and after audio signal transmission, by way of SECO, the standby pin of first transducing audio amplifier 120
122 level state (step S13), then after the first delay time by 50~150 microseconds (ms), such as passing through
After 100 microseconds, the level change of the Jing Yin pin 121 of reconvert audio-frequency amplifier 120, audio-frequency amplifier is allowed to turn from silent mode
It is changed to play mode (step S14).Wherein, lead to the Let that Over the first prolongs Time Time Inter to put, allow audio signal in transmit process, due to
Some components between audio frequency processing circuit 110 and audio-frequency amplifier 120 are by noise quilt caused by electric current moment impact
It is isolated in outside sound channel, without sending sound by volume output device 140.When audio frequency processing circuit 110 receives and locates
After reason audio signal (step S15), the audio signal after processing is sent to audio-frequency amplifier 120.Then, amplified by audio
Device 120 carries out gain process to audio signal, and is sent to volume output device 140 and carrys out play sound effect (step S16).
Afterwards, when stopping playing audio file on TV, sent by pressing the physical button on remote control or TV
Exit signal.After processor 130 receives and exits signal, i.e., basis exits signal and first replys the Jing Yin of audio-frequency amplifier 120
The level state (step S17) of pin 121, then after the second delay time, such as after 100 microseconds, then reply
The level state of the standby pin 122 of audio-frequency amplifier 120, the level state of Jing Yin pin 121 and standby pin 122 is allowed to return
It is default conditions again, so that it is silent mode (step S18) that audio-frequency amplifier 120 is replied from play mode.Similarly, pass through
The setting of second delay time, noise can also be avoided to send sound from volume output device.Then, then processor 130 is passed through
Stop sending audio signal, and exit the playing program of audio file.
Consequently, it is possible to before audio signal is sent and before stopping transmission, processor 130 is first passed through by foot amplifier
Acoustic channel between 120 and volume output device 140 is closed, and is allowed in audio signal transmit process, due to audio frequency processing circuit
Some components between 110 and audio-frequency amplifier 120 are isolated in sound by noise caused by electric current moment impact and led to
Outside road, so as to avoid these noises from being output, and reach the purpose to abate the noise.
As shown in figure 3, the method for the elimination television noise disclosed by the application second embodiment, including：
Step S21, it is low to control the Jing Yin pin of audio-frequency amplifier and the level state of standby pin, amplifies audio
Device enters silent mode；
Step S22, send audio signal；
Step S23, the level state of standby pin is changed as high level；
Step S24, the level state of Jing Yin pin is changed after the first delay time as high level, enters audio-frequency amplifier
Enter play mode；
Step S25, receive and handle audio signal；
Step S26, the audio signal after transmission processing；
Step S27, it is low according to exiting signal and replying the level state of Jing Yin pin；
Step S28, it is low that the level state of standby pin is replied after the second delay time, replys audio-frequency amplifier quiet
Sound pattern；And
Step S29, stop sending audio signal.
Fig. 1 and Fig. 3 are refer to, is held, the method for the elimination television noise disclosed by the second embodiment of the application and the
One embodiment is roughly the same, and difference between the two is, the present embodiment with the Jing Yin pin 121 of audio-frequency amplifier 120 with it is standby
The level state of pin 122 is the low default conditions as silent mode.Therefore, in the operation of follow-up elimination television noise
In, after processor 130 sends audio signal, processor i.e. by SECO mode, first transducing audio amplifier 120 it is standby
The level state of pin 122 is height, then after the first delay time, the Jing Yin pin of reconvert audio-frequency amplifier 120
121 level state is height, allows audio-frequency amplifier 120 to be converted to play mode from silent mode, in order to allow audio signal to exist
Audio can be played out by volume output device 140 after treatment.Similarly, received in processor 130 and exit signal
Afterwards, i.e., according to exit signal first reply audio-frequency amplifier 120 Jing Yin pin 121 level state to be low, then by the
After two delay times, then reply audio-frequency amplifier 120 standby pin 122 level state to be low, allow Jing Yin pin 121 with treating
The level state of power traction pin 122 is replied as default conditions, so that it is Jing Yin mould that audio-frequency amplifier 120 is replied from play mode
Formula, so, it can be ensured that caused noise just commences play out or exited broadcasting in audio file in audio signal transmission program
Moment, volume output device 140 is sent to all without by audio-frequency amplifier 120, so as to reach the effect of noise is completely eliminated.
Some preferred embodiments of the application have shown and described in described above, but as previously described, it should be understood that the application
Be not limited to form disclosed herein, be not to be taken as the exclusion to other embodiment, and available for various other combinations,
Modification and environment, and above-mentioned teaching or the technology or knowledge of association area can be passed through in the scope of the invention is set forth herein
It is modified., then all should be in this Shen and the change and change that those skilled in the art are carried out do not depart from spirit and scope
Please be in the protection domain of appended claims.
Claims (6)
- A kind of 1. method for eliminating television noise, it is characterised in that including：It is low to control the Jing Yin pin of audio-frequency amplifier and the level state of standby pin, enters the audio-frequency amplifier in meditation Sound pattern；Send audio signal；The level state for changing the standby pin is height；The level state of the Jing Yin pin is changed after the first delay time For height, the audio-frequency amplifier is entered play mode, audio frequency processing circuit and the audio-frequency amplifier is received and is handled The audio signal, and the audio signal sent after processing plays to volume output device；It is low according to exiting signal and replying the level state of the Jing Yin pin；It is low that the level state of the standby pin is replied after the second delay time, replys the audio-frequency amplifier described quiet Sound pattern；AndStop sending the audio signal.
- 2. the method for television noise is eliminated as claimed in claim 1, it is characterised in thatIn the operation of the level state of Jing Yin pin and the standby pin of control audio-frequency amplifier, control the Jing Yin pin with The level of the standby pin is low；After the audio signal is sent, the level for changing the standby pin is height, and after first delay time, The level for changing the Jing Yin pin is height；AndAfter operation of the audio signal after sending the processing to the audio output device, replied according to the signal that exits The level of the Jing Yin pin is low, and the level for replying after second delay time standby pin is low.
- 3. the method for television noise is eliminated as claimed in claim 1, it is characterised in that first delay time and described the Two delay times are respectively interposed between 50~150 microseconds.
- 4. a kind of system for eliminating television noise, it is characterised in that the system for eliminating television noise will using aforesaid right The method for seeking the elimination television noise any one of 1~3, the system include：Audio-frequency amplifier, there is Jing Yin pin and standby pin；Processor, it is coupled to the Jing Yin pin and the standby pin；AndAudio frequency processing circuit, be coupled between the processor and the audio-frequency amplifier, the audio frequency processing circuit receive with The audio signal that the processor is sent is handled, and transmits the audio signal after processing to the audio-frequency amplifier；Wherein described processor controls the Jing Yin pin to treat power traction with described before sending or stopping sending the audio signal The level state of pin, the audio-frequency amplifier is set to enter silent mode.
- 5. the system of television noise is eliminated as claimed in claim 4, it is characterised in that the processor is sending the audio After signal, the Jing Yin pin is controlled to be the change over order of high level from low transition with the standby pin, and stopping Before only sending the audio signal, it is low level reply to control the Jing Yin pin to be replied with the standby pin from high level Sequentially.
- 6. the system of television noise is eliminated as claimed in claim 4, it is characterised in that also include：Volume output device, the audio frequency processing circuit is coupled to, to receive the audio signal after the processing, and output sound Sound.
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| CN201310755712.XA CN103702048B (en) | 2013-12-27 | 2013-12-27 | Eliminate the method and system of television noise |
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| CN201310755712.XA CN103702048B (en) | 2013-12-27 | 2013-12-27 | Eliminate the method and system of television noise |
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| CN103702048B true CN103702048B (en) | 2018-03-09 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105446696B (en) * | 2015-12-31 | 2018-10-26 | 青岛歌尔声学科技有限公司 | A kind of system and method inhibiting noise of blasting |
| CN108092627B (en) * | 2016-11-23 | 2021-05-18 | 华润微集成电路(无锡)有限公司 | Class D power amplifier circuit system |
| CN107889030A (en) * | 2017-11-20 | 2018-04-06 | 深圳市沃特沃德股份有限公司 | The method and apparatus for controlling power amplifier |
| CN114650485A (en) * | 2020-12-18 | 2022-06-21 | 广西三诺数字科技有限公司 | Signal transmission method and device, computer equipment and storage medium |
| CN115604405A (en) * | 2021-06-28 | 2023-01-13 | 苏州佳世达光电有限公司（Cn） | Electronic device |
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| CN201118792Y (en) * | 2007-12-07 | 2008-09-17 | 四川长虹电器股份有限公司 | A silence control circuit |
| CN101471635A (en) * | 2007-12-27 | 2009-07-01 | 联发科技股份有限公司 | Method for controlling volume of a multimedia player |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201001104Y (en) * | 2007-01-12 | 2008-01-02 | 深圳创维－Rgb电子有限公司 | Impact sound preventing circuit |
| US8340320B2 (en) * | 2008-11-25 | 2012-12-25 | Mediatek Inc. | Mute circuits |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201118792Y (en) * | 2007-12-07 | 2008-09-17 | 四川长虹电器股份有限公司 | A silence control circuit |
| CN101471635A (en) * | 2007-12-27 | 2009-07-01 | 联发科技股份有限公司 | Method for controlling volume of a multimedia player |
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Address after: Room 301-1, Room 301-3, Area B2, Animation Building, No. 126 Animation Road, Zhongxin Eco-city, Tianjin Binhai New Area, Tianjin Patentee after: LE SHI ZHI XIN ELECTRONIC TECHNOLOGY (TIANJIN) Ltd. Address before: 300453 Tianjin Binhai New Area, Tianjin Eco-city, No. 126 Animation and Animation Center Road, Area B1, Second Floor 201-427 Patentee before: Xinle Visual Intelligent Electronic Technology (Tianjin) Co.,Ltd. Address after: 300453 Tianjin Binhai New Area, Tianjin Eco-city, No. 126 Animation and Animation Center Road, Area B1, Second Floor 201-427 Patentee after: Xinle Visual Intelligent Electronic Technology (Tianjin) Co.,Ltd. Address before: 300467 Tianjin Binhai New Area, ecological city, animation Middle Road, building, No. two, B1 District, 201-427 Patentee before: LE SHI ZHI XIN ELECTRONIC TECHNOLOGY (TIANJIN) Ltd. |
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