CN107872681A - A kind of device and method using composite video signal base band transmission audio signal - Google Patents
A kind of device and method using composite video signal base band transmission audio signal Download PDFInfo
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- CN107872681A CN107872681A CN201711019319.9A CN201711019319A CN107872681A CN 107872681 A CN107872681 A CN 107872681A CN 201711019319 A CN201711019319 A CN 201711019319A CN 107872681 A CN107872681 A CN 107872681A
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- 230000005236 sound signal Effects 0.000 title claims abstract description 83
- 230000005540 biological transmission Effects 0.000 title claims abstract description 45
- 238000000034 method Methods 0.000 title claims abstract description 23
- 230000003111 delayed effect Effects 0.000 claims description 5
- 150000001875 compounds Chemical class 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 3
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- 238000005070 sampling Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/233—Processing of audio elementary streams
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/236—Assembling of a multiplex stream, e.g. transport stream, by combining a video stream with other content or additional data, e.g. inserting a URL [Uniform Resource Locator] into a video stream, multiplexing software data into a video stream; Remultiplexing of multiplex streams; Insertion of stuffing bits into the multiplex stream, e.g. to obtain a constant bit-rate; Assembling of a packetised elementary stream
- H04N21/2368—Multiplexing of audio and video streams
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
Abstract
The invention discloses a kind of device and method using composite video signal base band transmission audio signal, module and voice modulation module are enabled including audio difference block, voice modulation, wherein, the base-band audio signal of input exports audio differential signal after entering the processing of audio difference block；Voice modulation enables field counter and row calculator of the module based on composite video and judges whether the expection line position positioned at composite video signal field blanking section is put for current location, and generates enable signal；The composite video signal with audio is exported after audio differential signal, composite video signal and the input voice modulation module analysis processing of voice modulation enable signal.Audio signal of the present invention is transmitted with baseband form, without frequency modulation(PFM), reduces cost, long-distance transmissions signal attenuation is few, and noise resisting ability is strong, avoids crosstalk between signal.
Description
Technical field
The present invention relates to audio-video signal transmission technique field, more particularly to one kind to utilize composite video signal base band transmission
The device and method of audio signal.
Background technology
The method for the most of transmission audio signals that presently, there are is first to carry out the audio signal of base band at preemphasis
Treated base-band audio signal, is then modulated on the carrier wave of higher frequency, frequency is generally by reason by frequency modulated mode
Tens megahertzs, then modulated audio signal and modulated composite video signal are superimposed, so as to which audio be believed
Number sent together with vision signal and to be transferred to receiving terminal.
Prior art also has the following disadvantages：1. audio signal carries out frequency modulation(PFM), send system and reception system is realized
More complicated, the cost of sending and receiving device is high.2. audio signal easily causes larger distortion through frequency modulation and demodulating process.
3. because be superimposed after modulates audio signals with composite video signal easily caused by audio frequency and video crosstalk.
The content of the invention
In view of the shortcomings of the prior art, a kind of device and side using composite video signal base band transmission audio signal is proposed
Method, audio signal of the present invention are transmitted with baseband form, without frequency modulation(PFM), reduce the realization of transmission system and reception system
Complexity, the cost of sending and receiving device is saved；Audio signal is transmitted with baseband form, avoids audio signal through frequency modulation
With distortion caused by demodulating process, there is transmission range length, the advantages of attenuation distortion is small；Audio signal is placed on composite video letter
During number blanking, not with vision signal simultaneous transmission, avoid prior art because after modulates audio signals with composite video signal
It is superimposed and caused audio frequency and video crosstalk；Audio signal has been carried out at difference before being modulated in composite video signal
Reason, improve noise resistance interference performance.
In order to solve the deficiencies in the prior art, the present invention provides one kind and utilizes composite video signal base band transmission audio signal
Device, including audio difference block, voice modulation enable module and voice modulation module, wherein, the base-band audio letter of input
Audio differential signal is exported after number entering the processing of audio difference block；Voice modulation enables field of the module based on composite video and counted
Device and linage-counter judge whether the expection line position positioned at composite video signal field blanking section is put for current location, and generate enabled
Signal；It is defeated after audio differential signal, composite video signal and the input voice modulation module analysis processing of voice modulation enable signal
Go out the composite video signal with audio.
As a kind of preferred embodiment, the audio difference block includes adder and delay unit, and delay unit is will be defeated
The base-band audio signal X enterediBe delayed n unit interval, wherein n for can setting value, n is integer more than or equal to 1, adder general
The base-band audio signal X of inputiWith the base-band audio signal X of delayi-nDifference processing is carried out, obtains audio differential signal Di, i is
Sample point number.
As a kind of preferred embodiment, the voice modulation enables module and is based on row field caused by composite video signal encoder
Sequential judges the current section for whether being used to transmit audio expected from, if being in audio transmission section, enable signal is put
FiFor 1, otherwise enable signal Fi0 is set to, wherein, VcntFor the field counter of composite video encoder, HcntFor compound video code
The linage-counter of device, HsTo transmit the starting point of audio signal, H in regulation a lineeTo transmit the knot of audio signal in regulation a line
Spot.
As a kind of method for optimizing, audio differential signal and audio that the voice modulation module inputs according to S1 steps
The expection line position that audio differential signal is put into composite video signal field blanking section by modulation enable signal is put, and is closed with vision signal
And export the composite video signal S with audioi, then carry out subsequent transmission；Wherein, ViGenerated for composite video signal encoder
Vision signal, DiFor audio differential signal, V0To be added in a DC level signal on audio differential signal.
The present invention also provides a kind of method using composite video signal base band transmission audio signal, comprises the steps of：
S1：The base-band audio signal of input exports audio differential signal after entering the processing of audio difference block；
S2：Voice modulation enable field counter and linage-counter of the module based on composite video judge current location whether position
Expection line position in composite video signal field blanking section is put, and generates enable signal；
S3：At audio differential signal, composite video signal and voice modulation enable signal input voice modulation module analysis
The composite video signal with audio is exported after reason.
As a kind of method for optimizing, audio difference block described in the S1 steps includes adder and delay unit, delay
Unit is by the base-band audio signal X of inputiBe delayed n unit interval, wherein n for can setting value, n be it is whole more than or equal to 1
Number, adder is by the base-band audio signal X of inputiWith the base-band audio signal X of delayi-nDifference processing is carried out, it is poor to obtain audio
Sub-signal Di, i is sample point number, and its expression formula is as follows：Di=Xi-Xi-n。
As a kind of method for optimizing, the voice modulation in the S2 steps enables module and is based on composite video signal encoder
Caused row field sequential judges the current section for whether being used to transmit audio expected from, if being in audio transmission section,
Enable signal puts FiFor 1, otherwise enable signal Fi0 is set to, wherein, VcntFor the field counter of composite video encoder, HcntIt is multiple
Close the linage-counter of video encoder, HsTo transmit the starting point of audio signal, H in regulation a lineeTo transmit sound in regulation a line
The end point of frequency signal, its expression formula are as follows：
As a kind of method for optimizing, audio differential signal and audio that the voice modulation module inputs according to S1 steps
The expection line position that audio differential signal is put into composite video signal field blanking section by modulation enable signal is put, and is closed with vision signal
And export the composite video signal S with audioi, then carry out subsequent transmission；Wherein, ViGenerated for composite video signal encoder
Vision signal, DiFor audio differential signal, V0To be added in a DC level signal on audio differential signal, its mathematical table
It is as follows up to formula：
Compared with prior art, its remarkable advantage is the present invention：
Audio signal of the present invention is transmitted with baseband form, without frequency modulation(PFM), reduces transmission system and reception system
Implementation complexity, saved the cost of sending and receiving device；
Audio signal of the present invention is transmitted with baseband form, avoids audio signal through mistake caused by frequency modulation and demodulating process
Very, with the advantages of transmission range length, attenuation distortion is small；
During audio signal of the present invention is placed on composite video signal blanking, not with vision signal simultaneous transmission, avoid
Prior art because be superimposed after modulates audio signals with composite video signal and caused by audio frequency and video crosstalk；
Audio signal of the present invention has carried out difference processing before being modulated in composite video signal, improves noise resistance and does
Disturb ability.
Brief description of the drawings
Fig. 1 is the apparatus structure schematic diagram of the present invention.
Fig. 2 is audio difference block internal structure schematic diagram of the present invention.
Fig. 3 is modulates audio signals of the present invention to vision signal embodiment schematic diagram.
Embodiment
Embodiments of the invention are further described below in conjunction with the accompanying drawings, but should not be construed as the limit to the application
System.
Present invention offer one embodiment, a kind of device using composite video signal base band transmission audio signal, including
Audio difference block, voice modulation enable module and voice modulation module, wherein, the base-band audio signal of input is poor into audio
Audio differential signal is exported after sub-module processing；Voice modulation enables field counter and linage-counter of the module based on composite video
Judge whether the expection line position positioned at composite video signal field blanking section is put for current location, and generate enable signal；Audio is poor
Answering with audio is exported after sub-signal, composite video signal and the input voice modulation module analysis processing of voice modulation enable signal
Close vision signal.
The present invention also provides one embodiment, a kind of method using composite video signal base band transmission audio signal, bag
Containing following steps：
S1：The base-band audio signal of input exports audio differential signal after entering the processing of audio difference block；
S2：Voice modulation enable field counter and linage-counter of the module based on composite video judge current location whether position
Expection line position in composite video signal field blanking section is put, and generates enable signal；
S3：At audio differential signal, composite video signal and voice modulation enable signal input voice modulation module analysis
The composite video signal with audio is exported after reason.
The present embodiment is applicable in the scene of audio signal base band transmission, utilizes composite video signal base band transmission audio
Signal method can utilize composite video signal base band by being performed using composite video signal base band transmission audio signal device
Transmission audio signal method specifically includes following steps：
As shown in figure 1, the base-band audio signal of input is carried out into difference processing by audio difference block, output audio is poor
Sub-signal, it is therefore an objective to improve the anti-noise jamming ability of audio signal；Then, module is enabled by voice modulation, judged current
Whether the expection line position positioned at composite video signal field blanking section is put for position, and generates enable signal, prevents audio signal from putting
In effective video or the position of influence effective video decoding, interference is produced to video；Finally, according to enable signal above by sound
Frequency difference sub-signal is put into composite video signal desired location and is transmitted, if enable signal is in open mode, exports audio
Differential signal is modulated in composite video signal；If enable signal is closed, audio differential signal is not exported.
As shown in Fig. 2 audio difference block is used to the base-band audio signal of input becoming audio differential signal, after convenient
Continue and transmitted in composite video signal predetermined region.Relative to original audio signal, there is audio differential signal higher resisting to do
Immunity energy, therefore it is favorably improved the transmission performance of audio signal.
Delay unit is by the base-band audio signal X of inputiBe delayed n unit interval, wherein n be can setting value, its value
For the integer more than or equal to 1.Appropriate adjustment n span can reduce the influence of some noises, but hold if value is too big
Easily cause distorted signals, value is 1 in the present embodiment.Adder is by the base-band audio signal X of inputiWith the base-band audio of delay
Signal Xi-nDifference processing is carried out, obtains audio differential signal Di, its mathematic(al) representation is as follows：Di=Xi-Xi-n, wherein, i
For sample point number, for the value of linage-counter, each sampling point clock adds 1, reset when equal to a line maximum number of samples.
Judge to work as by row field sequential caused by composite video signal encoder as shown in figure 3, voice modulation enables module
The preceding section for whether being used to transmit audio expected from, if being in audio transmission section, enable signal puts FiFor 1, otherwise
Enable signal Fi0 is set to, its expression formula is as follows：
Wherein, " ＆＆ " represents logical "and", and the condition of its right and left must meet simultaneously；VcntFor composite video encoder
Field counter, started counting up with zero, pass through VcntField blanking section and the field valid interval of signal can be distinguished.VsPassed for regulation
The initial row of defeated audio signal, VeFor the end line of regulation transmission audio signal.Due to valid interval transmission video signal on the scene,
Audio signal to transmit base band, just can only blanking section on the scene transmission, therefore, VsAnd VeValue can not exceed field blanking
Interval range.Because field blanking section is different because composite video signal system types are different, therefore believe for different composite videos
Number VsAnd VeValue need to set respectively.Meanwhile if the composite video signal of current standard has particular row signal in field blanking interval
In the presence of, then setting transmission audio position when must consider, it is impossible to audio signal is placed in the particular row of vision signal.
Wherein, HcntFor the linage-counter of composite video encoder, started counting up with zero, pass through HcntThe row of signal can be distinguished
Valid interval and row valid interval.HsTo transmit the starting point of audio signal in regulation a line, He is to transmit sound in regulation a line
The end point of frequency signal, because blanking section of being expert at has horizontal synchronizing pulse etc., some are used for the information of identification row sequential, therefore sound
Frequency signal can only be expert at, and valid interval is interior to be transmitted.Therefore, HsAnd HeValue can not exceed row valid interval scope, generally, HsWith
HeValue it is identical with the row valid interval of vision signal.
The enabled letter of voice modulation for audio differential signal and S2 the steps output that voice modulation module exports S1 steps
Number, it is put into position as defined in composite video signal according to certain method and is incorporated as system output signal S with vision signaliEnter
Row transmission.Its mathematic(al) representation is as follows：
Wherein, FiFor voice modulation enable signal, when its value is 1, by modulates audio signals to vision signal；When it
Be worth for 0 when, only export vision signal.ViFor the vision signal of composite video signal encoder generation, DiFor audio differential signal,
V0To be added in a DC level signal on audio differential signal, it is modulated to for suitably integral raising in vision signal
Audio signal, prevent the distortion of audio signal bottom from overflowing.
The above is only the preferred embodiment of the present invention, protection scope of the present invention is not limited merely to above-described embodiment,
All technical schemes belonged under thinking of the present invention belong to protection scope of the present invention.It should be pointed out that for the art
For those of ordinary skill, some improvements and modifications without departing from the principles of the present invention, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (8)
- A kind of 1. device using composite video signal base band transmission audio signal, it is characterised in that：Including audio difference block, Voice modulation enables module and voice modulation module, wherein,The base-band audio signal of input exports audio differential signal after entering the processing of audio difference block；Whether voice modulation enables field counter and linage-counter of the module based on composite video and judges current location positioned at compound The expection line position in video field signal blanking section is put, and generates enable signal；Exported after audio differential signal, composite video signal and the input voice modulation module analysis processing of voice modulation enable signal Composite video signal with audio.
- 2. the device using composite video signal base band transmission audio signal stated according to claim 1, it is characterised in that described Audio difference block includes adder and delay unit, and delay unit is by the base-band audio signal X of inputiBe delayed n unit Time, wherein n for can setting value, n is integer more than or equal to 1, and adder is by the base-band audio signal X of inputiWith delay Base-band audio signal Xi-nDifference processing is carried out, obtains audio differential signal Di, i is sample point number.
- 3. the device according to claim 1 using composite video signal base band transmission audio signal, it is characterised in that institute The voice modulation stated enables module and is expected based on whether sequential judgement in row field caused by composite video signal encoder is currently located at Be used for transmit the section of audio, if being in audio transmission section, enable signal puts FiFor 1, otherwise enable signal FiIt is set to 0, Wherein, VcntFor the field counter of composite video encoder, HcntFor the linage-counter of composite video encoder, HsTo provide a line The starting point of middle transmission audio signal, HeTo transmit the end point of audio signal in regulation a line.
- 4. the device according to claim 1 using composite video signal base band transmission audio signal, it is characterised in that institute State voice modulation module and audio differential signal is put into by composite video according to audio differential signal and voice modulation enable signal The expection line position in signal field blanking section is put, and composite video signal S of the output with audio is merged with vision signali, then carry out Subsequent transmission；Wherein, ViFor the vision signal of composite video signal encoder generation, DiFor audio differential signal, V0To be added in sound A DC level signal on frequency difference sub-signal.
- 5. a kind of method using the composite video signal base band transmission audio signal device as described in claim any one of 1-4, Characterized in that, it is comprised the steps of：S1：The base-band audio signal of input exports audio differential signal after entering the processing of audio difference block；S2：Whether voice modulation enables field counter and linage-counter of the module based on composite video and judges current location positioned at multiple The expection line position for closing video field signal blanking section is put, and generates enable signal；S3：After audio differential signal, composite video signal and the input voice modulation module analysis processing of voice modulation enable signal Export the composite video signal with audio.
- 6. the method according to claim 5 using composite video signal base band transmission audio signal, it is characterised in that institute Stating the audio difference block in S1 steps includes adder and delay unit, and delay unit is by the base-band audio signal X of inputi Be delayed n unit interval, wherein n for can setting value, n is integer more than or equal to 1, and adder is by the base-band audio signal of input XiWith the base-band audio signal X of delayi-nDifference processing is carried out, obtains audio differential signal Di, i is sample point number, its expression formula It is as follows：Di=Xi-Xi-n。
- 7. the method according to claim 5 using composite video signal base band transmission audio signal, it is characterised in that institute State voice modulation in S2 steps enable module be based on row field sequential caused by composite video signal encoder judge it is current whether Positioned at the expected section for being used to transmit audio, if being in audio transmission section, enable signal puts FiFor 1, letter is otherwise enabled Number Fi0 is set to, wherein, VcntFor the field counter of composite video encoder, HcntFor the linage-counter of composite video encoder, Hs To transmit the starting point of audio signal, H in regulation a lineeTo transmit the end point of audio signal, its expression formula in regulation a line It is as follows：
- 8. the method according to claim 5 using composite video signal base band transmission audio signal, it is characterised in that institute The voice modulation enable signal for stating audio differential signal that voice modulation module inputs according to S1 steps and the output of S2 steps will The expection line position that audio differential signal is put into composite video signal field blanking section is put, and output is merged with vision signal with audio Composite video signal Si, then carry out subsequent transmission；Wherein, ViFor the vision signal of composite video signal encoder generation, DiFor Audio differential signal, V0To be added in a DC level signal on audio differential signal, its mathematic(al) representation is as follows：<mrow> <msub> <mi>S</mi> <mi>i</mi> </msub> <mo>=</mo> <mfenced open = "{" close = ""> <mtable> <mtr> <mtd> <mrow> <msub> <mi>V</mi> <mi>i</mi> </msub> <mo>+</mo> <msub> <mi>D</mi> <mi>i</mi> </msub> <mo>+</mo> <msub> <mi>V</mi> <mn>0</mn> </msub> </mrow> </mtd> <mtd> <mrow> <msub> <mi>F</mi> <mi>i</mi> </msub> <mo>=</mo> <mn>1</mn> </mrow> </mtd> </mtr> <mtr> <mtd> <msub> <mi>V</mi> <mi>i</mi> </msub> </mtd> <mtd> <mrow> <mi>e</mi> <mi>l</mi> <mi>s</mi> <mi>e</mi> </mrow> </mtd> </mtr> </mtable> </mfenced> <mo>.</mo> </mrow>
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109495703A (en) * | 2018-11-09 | 2019-03-19 | 广州长嘉电子有限公司 | A kind of the simulated television playback method and system of plug-in coaxial audio-frequency module |
| CN110062187A (en) * | 2019-04-25 | 2019-07-26 | 杭州雄迈集成电路技术有限公司 | A kind of system and method for efficient coaxial control information transmission |
| CN110958424A (en) * | 2018-09-27 | 2020-04-03 | 奈斯特株式会社 | Mixed signal output method and device of image and sound |
| CN110971838A (en) * | 2018-09-28 | 2020-04-07 | 奈斯特株式会社 | Mixed signal generating method and device of image and sound |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5426466A (en) * | 1992-12-31 | 1995-06-20 | Emhiser Research Limited | Composite video signal with audio |
| CN1428047A (en) * | 2000-12-18 | 2003-07-02 | 松下电器产业株式会社 | Encryption transmission system |
| CN1750638A (en) * | 2001-03-23 | 2006-03-22 | 松下电器产业株式会社 | Data transmitting and receiving method and device, data transmission system and data transmission/reception method |
| CN1917651A (en) * | 2005-07-08 | 2007-02-21 | 三星电子株式会社 | Hdmi transmission systems for delivering image signals and packetized audio and auxiliary data and related hdmi transmission methods |
| CN101009849A (en) * | 2006-01-26 | 2007-08-01 | 深圳艾科创新微电子有限公司 | USB2.0 interface-based audio and video data transfer method |
| CN201663671U (en) * | 2010-01-20 | 2010-12-01 | 南京北路自动化系统有限责任公司 | Coal mine remote intrinsic safety intercom system based on noise reduction and suppression common-code interference balance |
| CN202872986U (en) * | 2012-10-31 | 2013-04-10 | 湖南航天卫星通信科技有限公司 | Double-input wireless high definition transmission system |
| CN203352618U (en) * | 2013-08-08 | 2013-12-18 | 成都洁源盛科技有限公司 | Digital baseband speech transmission system based on low code rate |
| CN103974089A (en) * | 2013-02-06 | 2014-08-06 | 北京昆腾微电子有限公司 | Wireless audio and video transmitter and wireless audio and video processing method |
| CN207530981U (en) * | 2017-10-26 | 2018-06-22 | 杭州雄迈集成电路技术有限公司 | A kind of device using composite video signal base band transmission audio signal |
-
2017
- 2017-10-26 CN CN201711019319.9A patent/CN107872681A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5426466A (en) * | 1992-12-31 | 1995-06-20 | Emhiser Research Limited | Composite video signal with audio |
| CN1428047A (en) * | 2000-12-18 | 2003-07-02 | 松下电器产业株式会社 | Encryption transmission system |
| CN1750638A (en) * | 2001-03-23 | 2006-03-22 | 松下电器产业株式会社 | Data transmitting and receiving method and device, data transmission system and data transmission/reception method |
| CN1917651A (en) * | 2005-07-08 | 2007-02-21 | 三星电子株式会社 | Hdmi transmission systems for delivering image signals and packetized audio and auxiliary data and related hdmi transmission methods |
| CN101009849A (en) * | 2006-01-26 | 2007-08-01 | 深圳艾科创新微电子有限公司 | USB2.0 interface-based audio and video data transfer method |
| CN201663671U (en) * | 2010-01-20 | 2010-12-01 | 南京北路自动化系统有限责任公司 | Coal mine remote intrinsic safety intercom system based on noise reduction and suppression common-code interference balance |
| CN202872986U (en) * | 2012-10-31 | 2013-04-10 | 湖南航天卫星通信科技有限公司 | Double-input wireless high definition transmission system |
| CN103974089A (en) * | 2013-02-06 | 2014-08-06 | 北京昆腾微电子有限公司 | Wireless audio and video transmitter and wireless audio and video processing method |
| CN203352618U (en) * | 2013-08-08 | 2013-12-18 | 成都洁源盛科技有限公司 | Digital baseband speech transmission system based on low code rate |
| CN207530981U (en) * | 2017-10-26 | 2018-06-22 | 杭州雄迈集成电路技术有限公司 | A kind of device using composite video signal base band transmission audio signal |
Non-Patent Citations (1)
| Title |
|---|
| 马志欣，章敏: "《计算机网络基础教程》", 30 September 2007, 北京工业大学出版社, pages: 19 * |
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|---|---|---|---|---|
| CN110958424A (en) * | 2018-09-27 | 2020-04-03 | 奈斯特株式会社 | Mixed signal output method and device of image and sound |
| CN110971838A (en) * | 2018-09-28 | 2020-04-07 | 奈斯特株式会社 | Mixed signal generating method and device of image and sound |
| CN110971838B (en) * | 2018-09-28 | 2022-05-27 | 奈斯特株式会社 | Mixed signal generating method and device of image and sound |
| CN109495703A (en) * | 2018-11-09 | 2019-03-19 | 广州长嘉电子有限公司 | A kind of the simulated television playback method and system of plug-in coaxial audio-frequency module |
| CN109495703B (en) * | 2018-11-09 | 2021-03-23 | 广州长嘉电子有限公司 | Analog television playing method and system of plug-in coaxial audio module |
| CN110062187A (en) * | 2019-04-25 | 2019-07-26 | 杭州雄迈集成电路技术有限公司 | A kind of system and method for efficient coaxial control information transmission |
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