CN101202876A - Method for implementing synchronization of audio and picture by using audio frequency and video frequency composite channel in DVR - Google Patents
Method for implementing synchronization of audio and picture by using audio frequency and video frequency composite channel in DVR Download PDFInfo
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- CN101202876A CN101202876A CNA2006101302165A CN200610130216A CN101202876A CN 101202876 A CN101202876 A CN 101202876A CN A2006101302165 A CNA2006101302165 A CN A2006101302165A CN 200610130216 A CN200610130216 A CN 200610130216A CN 101202876 A CN101202876 A CN 101202876A
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Abstract
The invention relates to a method for realizing the synchronization of audio and image through an audio and video composite channel in DVR, and the invention adopts a video input channel as an audio input channel. As to the signal input by the special channel, a signal sampling module samples and sends the signal to a central processing unit to judge. If a video signal, the signal is processed according to the ordinary mode; if an audio signal, the signal is processed according to the audio signal by controlling DSP, and then is stored as the audio signal of the corresponding video after being dealt with by the CPU. The method ensures that the video signal and audio signal are transmitted, processed, stored and output through a uniform route. By processing and outputting audio and video separately, the invention greatly shortened the lag time of audio and video.
Description
Technical field
The present invention relates to the electronic monitoring technology, relate in particular to the solution of improving DVR sound and image asynchrony phenomenon in a kind of digital video recorder application.
Background technology
In the DVR technical field, the reason that DVR develops rapidly and popularizes, the one, global digitlization spring tide, the 2nd, the fast development of IT technology, the capacity of hard disc greatly improves, existing monomer hard-disk capacity arrives 250GB greatly, and its price reduces significantly, the size of DVR system scale can be carried out cutting simultaneously, can make conventional quantity record images with standard configuration 40GB hard disk, also can articulate the disk array of vast capacity, the specific demand that satisfy record greater number video image, prolongs video time; The technology of DVR system, mainly show all many-sides such as access scheduling, decompression scheme, systemic-function of image acquisition rates, image compression mode, hard disc information, it will be more widely used because of its advanced technology is ripe, yet, still there is defective in prior art, also has not exclusively synchronous situation in DVR image compression and sound compression, and 1-1.5 step-out second is arranged approximately, make DVR sound and image asynchrony phenomenon occur, influence audio visual effect to a certain extent.
Summary of the invention
The present invention is directed to the deficiencies in the prior art, the solution of a kind of DVR of improvement sound and image asynchrony phenomenon is provided;
The present invention adopts such technical scheme: be used as audio input channel with the video input channel, under to synchronous less demanding environment, this specific channel can be used by the ordinary video passage, under to synchronous demanding environment, this passage is used as sound channel, and avoid the mistake of signal is handled because the signal that machine intimate is equipped with is judged structure.
Employing is used as audio input channel with the video input channel, and the signal sampling module can and send central processing unit to judge to its sampling, and vision signal is then pressed the general mode normal process in this way; Voice signal in this way, then control DSP to it by sound signal processing, after CPU handles with its sound signal storage as corresponding video; When utilizing the video channel transmitting audio signal, with the attached voice-grade channel of composite channel as the main channel, when composite channel has the signal input, signal is after the A/D conversion, one the tunnel sends into the multiple signals mixing module, sampling module is sent on another road, sampling module to signal processing after, the feature code of signal is sent into CPU; Signal carries out data processing according to feature code, if vision signal, then the Signal Processing mode is identical with common DVR; If audio signal, CPU can send the Audio Processing instruction to signal mixing module and DSP, and the composite channel signal is mixed with main channel signal; Mixed signal is after DSP handles, and one the tunnel send output circuit, after the CPU processing is sent on another road, the composite channel signal is sent into the HDD storage as the audio frequency of main channel signal, makes vision signal and audio signal transmit, handle, store and output through unified path.
Description of drawings
Fig. 1 is a circuit connection diagram of the present invention, and as Figure of abstract.
Embodiment
As shown in Figure 1, employing is used as audio input channel with the video input channel.For the signal of this specific channel input, the signal sampling module can and send central processing unit to judge to its sampling, if vision signal is then pressed the general mode normal process; If voice signal, then control DSP to it by sound signal processing, after CPU handles with its sound signal storage as corresponding video.
In the method, when utilizing the video channel transmitting audio signal, with the passage (composite channel) that utilized attached voice-grade channel as another corresponding video passage (main channel).When composite channel had the signal input, signal was after the A/D conversion, and one the tunnel sends into the multiple signals mixing module, and sampling module is sent on another road.Sampling module to signal processing after, the feature code of signal is sent into CPU.Signal carries out data processing according to feature code, if vision signal, then the Signal Processing mode is identical with common DVR, no longer describes in detail here; If audio signal, CPU can send the Audio Processing instruction to signal mixing module and DSP.The composite channel signal is mixed with main channel signal.Mixed signal is after DSP handles, and one the tunnel send output circuit---after output in real time, another road send CPU to handle, the composite channel signal is sent into the HDD storage as the audio frequency of main channel signal.
More than since this method make vision signal and audio signal through the transmission of unified path, handle, storage and exporting.Audio ﹠ video is handled respectively and exported, significantly reduced the audio ﹠ video delay time.
Claims (1)
1. method of in DVR, utilizing the audio frequency and video composite channel to realize sound and image synchronization, employing is used as audio input channel with the video input channel, the signal sampling module can and send central processing unit to judge to its sampling, and vision signal is then pressed the general mode normal process in this way; Voice signal in this way, then control DSP to it by sound signal processing, after CPU handles with its sound signal storage as corresponding video; When utilizing the video channel transmitting audio signal, with the attached voice-grade channel of composite channel as the main channel, when composite channel has the signal input, signal is after the A/D conversion, one the tunnel sends into the multiple signals mixing module, sampling module is sent on another road, sampling module to signal processing after, the feature code of signal is sent into CPU; Signal carries out data processing according to feature code, if vision signal, then the Signal Processing mode is identical with common DVR; If audio signal, CPU can send the Audio Processing instruction to signal mixing module and DSP, and the composite channel signal is mixed with main channel signal; Mixed signal is after DSP handles, and one the tunnel send output circuit, after the CPU processing is sent on another road, the composite channel signal is sent into the HDD storage as the audio frequency of main channel signal, makes vision signal and audio signal transmit, handle, store and output through unified path.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006101302165A CN101202876A (en) | 2006-12-15 | 2006-12-15 | Method for implementing synchronization of audio and picture by using audio frequency and video frequency composite channel in DVR |
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2006101302165A CN101202876A (en) | 2006-12-15 | 2006-12-15 | Method for implementing synchronization of audio and picture by using audio frequency and video frequency composite channel in DVR |
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| CN101202876A true CN101202876A (en) | 2008-06-18 |
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| CNA2006101302165A Pending CN101202876A (en) | 2006-12-15 | 2006-12-15 | Method for implementing synchronization of audio and picture by using audio frequency and video frequency composite channel in DVR |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101615389B (en) * | 2008-06-24 | 2012-08-22 | 索尼株式会社 | Electronic apparatus, and video content editing method |
| CN116761030A (en) * | 2023-08-11 | 2023-09-15 | 南京汉卫教育科技有限公司 | Multi-machine-bit synchronous audio and video recording and playing system based on image recognition algorithm |
| CN117641020A (en) * | 2024-01-26 | 2024-03-01 | 腾讯科技（深圳）有限公司 | Information processing method and related device |
-
2006
- 2006-12-15 CN CNA2006101302165A patent/CN101202876A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101615389B (en) * | 2008-06-24 | 2012-08-22 | 索尼株式会社 | Electronic apparatus, and video content editing method |
| CN116761030A (en) * | 2023-08-11 | 2023-09-15 | 南京汉卫教育科技有限公司 | Multi-machine-bit synchronous audio and video recording and playing system based on image recognition algorithm |
| CN116761030B (en) * | 2023-08-11 | 2023-10-27 | 南京汉卫教育科技有限公司 | Multi-machine-bit synchronous audio and video recording and playing system based on image recognition algorithm |
| CN117641020A (en) * | 2024-01-26 | 2024-03-01 | 腾讯科技（深圳）有限公司 | Information processing method and related device |
| CN117641020B (en) * | 2024-01-26 | 2024-04-30 | 腾讯科技（深圳）有限公司 | Information processing method and related device |
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Open date: 20080618 |