CN105491478A - Subwoofer with volume being controlled by television sound envelope line - Google Patents
Subwoofer with volume being controlled by television sound envelope line Download PDFInfo
- Publication number
- CN105491478A CN105491478A CN201511029277.8A CN201511029277A CN105491478A CN 105491478 A CN105491478 A CN 105491478A CN 201511029277 A CN201511029277 A CN 201511029277A CN 105491478 A CN105491478 A CN 105491478A
- Authority
- CN
- China
- Prior art keywords
- low
- television
- volume
- subwoofer
- frequency
- 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.)
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Circuit For Audible Band Transducer (AREA)
- Tone Control, Compression And Expansion, Limiting Amplitude (AREA)
Abstract
Provided is a subwoofer with volume being controlled by a television sound envelope line. The subwoofer comprises a low pass filter, an audio sensor, a frequency spectrum modification circuit and a voltage-controlled gain amplifier. The lower pass filter has an input end in connection with an output end of a television line and filters required lower-frequency audio signals. The audio sensor is disposed adjacent to a loudspeaker of a television. Audio signals of the television that are detected by the audio sensor go through the frequency spectrum modification circuit, and feedback of low sound and other unwanted components are filtered, thereby forming a level envelop line representing the real-time volume of the television. Then the volume of the low-frequency audio signals outputted by the low pass filter is controlled by the level via the voltage-controlled gain amplifier. The low-frequency audio signals drive the loudspeaker after being amplified by an original low sound amplifier of the television. The subwoofer of the invention has the advantages that the subwoofer has a simple structure, is easy to implement, can be matched with all televisions, compensates the low sound components with low cost and significantly improves the sound quality.
Description
Technical field
The present invention relates to the subwoofer that a kind of envelope by sound of television controls volume, all television sets can be mated, with not high cost recovery bass contribution, significantly improve the tonequality of sound of television.
Background technology
After colour TV is lightening, loudspeaker are more and more less and more and more thinner, frequency response worse and worse, low frequency part wretched insufficiency.This situation, originally can a simply additional bass horn (being commonly called as subwoofer) just the low frequency part lacked can be recovered, present TV only has the standard circuit lead-out terminal of a constant level audio frequency mostly, although now low frequency part can be leached by low pass filter, but the level of this output does not adjust with television sound volume adjustment, that the volume of that is external subwoofer cannot follow TV and equal proportion change, but each tune is each, Consumer's Experience is very strange and inconvenient.Limit thus, substantially do not have product can be like this practical.
Summary of the invention
The present invention aims to provide the subwoofer that a kind of envelope by sound of television controls volume, with solve colour TV that prior art exists lightening after, loudspeaker are more and more less and more and more thinner, frequency response worse and worse, the problem of low frequency part wretched insufficiency.
Technical scheme of the present invention is: a kind of envelope by sound of television controls the subwoofer of volume, it is characterized in that, comprise low pass filter, audio sensor, frequency spectrum correction circuit and voltage control Amplifier, the input of low pass filter is connected with television line output, leaches the low-frequency audio signal of needs; Audio sensor is positioned near the loud speaker of television set, audio sensor detects the audio signal of TV, through frequency spectrum correction circuit, the feedback of filtering bass and other unwanted compositions, form the level envelope that represents the real-time volume of TV, the volume of the low-frequency audio signal that the low pass filter described in then being controlled by voltage control Amplifier with this level is exported, this low-frequency audio signal amplifies rear drive loud speaker through the original low playback amplifier of television set.
Advantage of the present invention is: can mate all television sets, compensates bass contribution, the tonequality of sound is greatly improved with not high cost (lower than soundbar+ subwoofer).Structure is simple, easily implements.
Accompanying drawing explanation
Fig. 1 is that circuit structure of the present invention purchases block diagram.
Embodiment
See Fig. 1, a kind of envelope by sound of television of the present invention controls the subwoofer of volume, it is characterized in that, comprise low pass filter 2, audio sensor 6, frequency spectrum correction circuit 7 and voltage control Amplifier 3, the input of low pass filter 3 is connected with television line output 1, leaches the low-frequency audio signal of needs; Audio sensor 6 is positioned near the loud speaker 5 of television set, audio sensor 6 detects the audio signal of TV, through frequency spectrum correction circuit 7, the feedback of filtering bass and other unwanted compositions, form the level envelope that represents the real-time volume of TV, then by the volume of this level by the low-frequency audio signal of low pass filter 2 output described in voltage control Amplifier (VCA) 3 control, this low-frequency audio signal amplifies rear drive loud speaker 5 (subwoofer) through the original low playback amplifier 4 of television set.
Operation principle of the present invention is: the full range signal first taken out by television line output 1 leaches the low frequency part (low-frequency audio signal) of needs.Simultaneously by the audio sensor 6 be positioned near TV loudspeaker, detect the sound of the loudspeaker of TV, frequency spectrum correction is carried out through frequency spectrum correction circuit 7, the feedback of filtering bass and other unwanted compositions, form the level envelope that represents the real-time volume of TV, then by the volume of this level by the low-frequency audio signal described in VCA (voltage control Amplifier 3) control.Adjustment television sound volume, the inevitable amplitude simultaneously changing envelope, the volume of subwoofer also changes along with the volume of TV.Reach the object that both volumes are synchronous.The each modular circuit that the present invention relates to is custom circuit.
Above content is in conjunction with concrete preferred implementation further description made for the present invention, can not assert that specific embodiment of the invention is confined to these explanations.For general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, its framework form can be flexible and changeable, can subseries product.Just make some simple deduction or replace, all should be considered as belonging to the scope of patent protection that the present invention is determined by submitted to claims.
Claims (1)
1. one kind is controlled the subwoofer of volume by the envelope of sound of television, it is characterized in that, comprise low pass filter, audio sensor, frequency spectrum correction circuit and voltage control Amplifier, the input of low pass filter is connected with television line output, leaches the low-frequency audio signal of needs; Audio sensor is positioned near the loud speaker of television set, audio sensor detects the audio signal of TV, through frequency spectrum correction circuit, the feedback of filtering bass and other unwanted compositions, form the level envelope that represents the real-time volume of TV, the volume of the low-frequency audio signal that the low pass filter described in then being controlled by voltage control Amplifier with this level is exported, this low-frequency audio signal amplifies rear drive loud speaker through the original low playback amplifier of television set.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511029277.8A CN105491478A (en) | 2015-12-30 | 2015-12-30 | Subwoofer with volume being controlled by television sound envelope line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511029277.8A CN105491478A (en) | 2015-12-30 | 2015-12-30 | Subwoofer with volume being controlled by television sound envelope line |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105491478A true CN105491478A (en) | 2016-04-13 |
Family
ID=55678133
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201511029277.8A Pending CN105491478A (en) | 2015-12-30 | 2015-12-30 | Subwoofer with volume being controlled by television sound envelope line |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105491478A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1877988A (en) * | 2005-06-06 | 2006-12-13 | 雅马哈株式会社 | Sound quality adjustment device |
| CN1879298A (en) * | 2003-09-11 | 2006-12-13 | 波士顿声学有限公司 | Dynamic bass boost apparatus and method |
| CN101599747A (en) * | 2008-05-05 | 2009-12-09 | 晨星软件研发(深圳)有限公司 | Sound volume control device and method |
| US20110135115A1 (en) * | 2009-12-09 | 2011-06-09 | Choi Jung-Woo | Sound enhancement apparatus and method |
| CN102771145A (en) * | 2010-01-07 | 2012-11-07 | 塔特公司 | Compressor based dynamic bass enhancement with EQ |
| CN103517183A (en) * | 2012-10-09 | 2014-01-15 | Tcl集团股份有限公司 | Method and device for strengthening subwoofer signals |
| CN103916097A (en) * | 2013-01-02 | 2014-07-09 | 三星电子株式会社 | Apparatus and method for processing audio signal |
| CN205491060U (en) * | 2015-12-30 | 2016-08-17 | 东莞爱乐电子科技有限公司 | Subwoofer of volume is controlled by envelope of TV sound |
-
2015
- 2015-12-30 CN CN201511029277.8A patent/CN105491478A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1879298A (en) * | 2003-09-11 | 2006-12-13 | 波士顿声学有限公司 | Dynamic bass boost apparatus and method |
| CN1877988A (en) * | 2005-06-06 | 2006-12-13 | 雅马哈株式会社 | Sound quality adjustment device |
| CN101599747A (en) * | 2008-05-05 | 2009-12-09 | 晨星软件研发(深圳)有限公司 | Sound volume control device and method |
| US20110135115A1 (en) * | 2009-12-09 | 2011-06-09 | Choi Jung-Woo | Sound enhancement apparatus and method |
| CN102771145A (en) * | 2010-01-07 | 2012-11-07 | 塔特公司 | Compressor based dynamic bass enhancement with EQ |
| CN103517183A (en) * | 2012-10-09 | 2014-01-15 | Tcl集团股份有限公司 | Method and device for strengthening subwoofer signals |
| CN103916097A (en) * | 2013-01-02 | 2014-07-09 | 三星电子株式会社 | Apparatus and method for processing audio signal |
| CN205491060U (en) * | 2015-12-30 | 2016-08-17 | 东莞爱乐电子科技有限公司 | Subwoofer of volume is controlled by envelope of TV sound |
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Legal Events
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160413 |
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| RJ01 | Rejection of invention patent application after publication |