CN109257641A - Wireless screen transmission sound intermediate frequency and video synchronization method and system - Google Patents
Wireless screen transmission sound intermediate frequency and video synchronization method and system Download PDFInfo
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- CN109257641A CN109257641A CN201811028804.7A CN201811028804A CN109257641A CN 109257641 A CN109257641 A CN 109257641A CN 201811028804 A CN201811028804 A CN 201811028804A CN 109257641 A CN109257641 A CN 109257641A
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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]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/4302—Content synchronisation processes, e.g. decoder synchronisation
- H04N21/4307—Synchronising the rendering of multiple content streams or additional data on devices, e.g. synchronisation of audio on a mobile phone with the video output on the TV screen
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/14—Digital output to display device ; Cooperation and interconnection of the display device with other functional units
- G06F3/1454—Digital output to display device ; Cooperation and interconnection of the display device with other functional units involving copying of the display data of a local workstation or window to a remote workstation or window so that an actual copy of the data is displayed simultaneously on two or more displays, e.g. teledisplay
-
- 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]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/439—Processing of audio elementary streams
- H04N21/4398—Processing of audio elementary streams involving reformatting operations of audio signals
-
- 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]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 scene graphs
- H04N21/4402—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 scene graphs involving reformatting operations of video signals for household redistribution, storage or real-time display
-
- 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]
- H04N21/80—Generation or processing of content or additional data by content creator independently of the distribution process; Content per se
- H04N21/85—Assembly of content; Generation of multimedia applications
- H04N21/854—Content authoring
- H04N21/8547—Content authoring involving timestamps for synchronizing content
Abstract
The present invention provides a kind of wireless screen transmission sound intermediate frequency and video synchronization methods, include the following steps: step S10, transmitting terminal acquisition audio data and video data, first synchronization process is done to audio data and video data, meanwhile biography screen device is sent to after encoding to treated audio data and video data；Step S20, it passes screen device and the second synchronization process is done to the audio data and video data that receive, and treated audio data and video data are sent to receiving end；Step S30, third synchronization process is done to the audio data and video data that receive in receiving end, and after being decoded to audio data and video data, is sent respectively to audio player and video player plays out；The present invention also provides a kind of wireless screen transmission sound intermediate frequency and video synchronizing systems.The present invention has the advantages that solving the problems, such as that audio data and video data are nonsynchronous during biography screen.
Description
Technical field
The present invention relates to technical field of computer information processing, a kind of wireless screen transmission sound intermediate frequency and audio video synchronization side are referred in particular to
Method and system.
Background technique
With the development of science and technology video conference, long-range link up become increasingly prevalent, enterprise or individual are using video council
When conference system is remotely linked up, it usually needs share corresponding content by wireless screen transmission technology to carry out demonstration operation.Nothing
Line passes screen technology and mainly realizes that the content shown on the screen by source device and sound are sent to projector, television set or meeting
The receiving end devices such as view plate play out displaying.
However, traditional wireless screen transmission technology is sampling recording audio data and video data respectively, then with respective
Encryption algorithm audio data and video data are encoded respectively, and respectively to audio data and video data into
The method of row transmission.There are following defects for traditional method: one is being encoded with respective encryption algorithm, leading to audio
The scramble time of data and the scramble time of video data be not identical, and it is different from the broadcasting of video data to easily lead to audio data
Step；The second is transmitting respectively to audio data and video data, the transmission of audio data and video data is easily led to
Time delay is different, and delay inequality is bigger in the insufficient situation of cpu performance, not can guarantee the received audio data of receiving end device and
The synchronization of video data.
Through retrieving, applying date 2017.07.07, application No. is 201710549300.9 Chinese invention patents to disclose
One key operation local area network wireless of plug and play passes screen operator, system and method.The patent passes screen operator using USB and is sending
It is established between end and receiving end after being wirelessly connected and carries out wireless screen transmission, there are following defects for the patent: lacking and guarantees audio
The measure of data and video data synchronization.
Summary of the invention
One of the technical problem to be solved in the present invention is to provide a kind of wireless screen transmission sound intermediate frequency and video synchronization method,
For solving the problems, such as that audio data and video data are nonsynchronous during biography is shielded.
The present invention is realized in one of technical problem: a kind of wireless screen transmission sound intermediate frequency and video synchronization method, described
Method includes the following steps:
Step S10, it is same to do first to audio data and video data for transmitting terminal acquisition audio data and video data
Step processing, meanwhile, biography screen device is sent to after encoding to treated audio data and video data；
Step S20, it passes screen device and the second synchronization process is done to the audio data and video data that receive, and will be after processing
Audio data and video data be sent to receiving end；
Step S30, third synchronization process is done to the audio data and video data that receive in receiving end, and to audio number
Accordingly and after video data is decoded, it is sent respectively to audio player and video player plays out.
Further, the step S10 specifically:
Step S11, after transmitting terminal has acquired audio data and video data, add in audio data and video data
The timestamp for entering data acquisition, does the first synchronization process；
Step S12, transmitting terminal encodes audio data and video data that timestamp is added；
Step S13, transmitting terminal by after coding audio data and video data be sent to biography screen device.
Further, the step S20 specifically:
Step S21, pass after screen device received audio data and video data, by the identical audio data of timestamp and
Video data package again, does the second synchronization process；
Step S22, it passes screen device and the audio data of package again and video data is sent to receiving end.
Further, the step S30 specifically:
Step S31, after receiving end has received audio data and video data, according to the audio number for currently needing to play
According to searching corresponding video data by timestamp, do third synchronization process；
Step S32, receiving end is played out corresponding player is sent to after audio data and video data decoding.
The second technical problem to be solved by the present invention is to provide a kind of wireless screen transmission sound intermediate frequency and video synchronizing system,
For solving the problems, such as that audio data and video data are nonsynchronous during biography is shielded.
The present invention is realized in the twos' of technical problem: a kind of wireless screen transmission sound intermediate frequency and video synchronizing system, described
System includes following module:
Audio-video collection module acquires audio data and video data for transmitting terminal, to audio data and video
Data do the first synchronization process, meanwhile, biography screen device is sent to after encoding to treated audio data and video data；
Audio-video passes panel module, does at the second synchronization for passing screen device to the audio data and video data that receive
Reason, and treated audio data and video data are sent to receiving end；
Audio and video playing module does at third synchronization the audio data and video data that receive for receiving end
Reason, and after being decoded to audio data and video data, it is sent respectively to audio player and video player carries out
It plays.
Further, the audio-video collection module specifically includes:
After adding timestamp unit, having acquired audio data and video data for transmitting terminal, in audio data and view
The timestamp of data acquisition is added in frequency in, does the first synchronization process；
Coding unit encodes audio data and video data that timestamp is added for transmitting terminal；
Coding audio-visual transmission unit, for transmitting terminal by after coding audio data and video data be sent to biography screen
Device.
Further, the audio-video passes panel module and specifically includes:
After transmitting synchronization unit, having received audio data and video data for biography screen device, by the identical sound of timestamp
Frequency accordingly and video data package again, does the second synchronization process；
Screen device data transmission unit is passed, shields device for passing and the audio data of package again and video data are sent to connect
Receiving end.
Further, the audio and video playing module specifically includes:
After playing synchronization unit, having received audio data and video data for receiving end, foundation currently needs to play
Audio data, corresponding video data is searched by timestamp, does third synchronization process；Audio/video decoding broadcast unit is used
Corresponding player is sent to after receiving end is by audio data and video data decoding to play out.
The present invention has the advantages that
1, it by the first synchronization module, the second synchronization module and third synchronization module, solves and passes screen process sound intermediate frequency
Data and the nonsynchronous problem of video data.
2, the timestamp of data acquisition is added in audio data and video data by the first synchronization module, so that sound
Frequency is accordingly and video data has synchronous foundation when playing.
3, the identical audio data of timestamp and video data again package are realized by audio by the second synchronization module
The synchronization of data and video data in transmission process.
4, corresponding video is searched by timestamp according to the audio data for currently needing to play by third synchronization module
Data realize the synchronization of playing audio-fequency data and video data.
Detailed description of the invention
The present invention is further illustrated in conjunction with the embodiments with reference to the accompanying drawings.
Fig. 1 is the schematic block circuit diagram of wireless screen transmission sound intermediate frequency of the present invention and video synchronization method and system.
Specific embodiment
It please refers to shown in Fig. 1, the preferred embodiment of wireless screen transmission sound intermediate frequency and video synchronization method of the present invention, including as follows
Step:
Step S10, it is same to do first to audio data and video data for transmitting terminal acquisition audio data and video data
Step processing, meanwhile, biography screen device is sent to after encoding to treated audio data and video data；
Step S20, it passes screen device and the second synchronization process is done to the audio data and video data that receive, and will be after processing
Audio data and video data be sent to receiving end；
Step S30, third synchronization process is done to the audio data and video data that receive in receiving end, and to audio number
Accordingly and after video data is decoded, it is sent respectively to audio player and video player plays out.
The step S10 specifically:
Step S11, after transmitting terminal has acquired audio data and video data, add in audio data and video data
The timestamp for entering data acquisition, does the first synchronization process；So that audio data and video data have when playing it is synchronous according to
According to；
Step S12, transmitting terminal encodes audio data and video data that timestamp is added；
Step S13, transmitting terminal by after coding audio data and video data be sent to biography screen device.
The step S20 specifically:
Step S21, pass after screen device received audio data and video data, by the identical audio data of timestamp and
Video data package again, does the second synchronization process；Realize the synchronization of audio data and video data in transmission process；
Step S22, it passes screen device and the audio data of package again and video data is wirelessly sent to reception
End.
The step S30 specifically:
Step S31, after receiving end has received audio data and video data, according to the audio number for currently needing to play
According to searching corresponding video data by timestamp, the case where if there is packet loss, search the immediate video counts of timestamp
According to doing third synchronization process；Corresponding video data is searched by timestamp, realizes playing audio-fequency data and video data
It is synchronous；
Step S32, receiving end is played out corresponding player is sent to after audio data and video data decoding.
The preferred embodiment of wireless screen transmission sound intermediate frequency and video synchronizing system of the present invention, including following module:
Audio-video collection module acquires audio data and video data for transmitting terminal, to audio data and video
Data do the first synchronization process, meanwhile, biography screen device is sent to after encoding to treated audio data and video data；
Audio-video passes panel module, does at the second synchronization for passing screen device to the audio data and video data that receive
Reason, and treated audio data and video data are sent to receiving end；
Audio and video playing module does at third synchronization the audio data and video data that receive for receiving end
Reason, and after being decoded to audio data and video data, it is sent respectively to audio player and video player carries out
It plays.
The audio-video collection module specifically includes:
After adding timestamp unit, having acquired audio data and video data for transmitting terminal, in audio data and view
The timestamp of data acquisition is added in frequency in, does the first synchronization process；So that audio data and video data are when playing
There is synchronous foundation；
Coding unit encodes audio data and video data that timestamp is added for transmitting terminal；
Coding audio-visual transmission unit, for transmitting terminal by after coding audio data and video data be sent to biography screen
Device.
The audio-video passes panel module and specifically includes:
After transmitting synchronization unit, having received audio data and video data for biography screen device, by the identical sound of timestamp
Frequency accordingly and video data package again, does the second synchronization process；Realize audio data and video data in transmission process
In synchronization；
It passes screen device data transmission unit, pass through the audio data of package again and video data wirelessly for passing screen device
Mode is sent to receiving end.
The audio and video playing module specifically includes:
After playing synchronization unit, having received audio data and video data for receiving end, foundation currently needs to play
Audio data, corresponding video data is searched by timestamp, the case where if there is packet loss, it is immediate to search timestamp
Video data does third synchronization process；Corresponding video data is searched by the timestamp of audio data, realizes and plays audio number
Accordingly and the synchronization of video data can according to currently needing the audio data played to search video data because amount of audio data is small
Accelerate search speed；
Audio/video decoding broadcast unit, will be sent to after audio data and video data decoding for receiving end it is corresponding
Player plays out.
In conclusion the present invention has the advantages that
1, it by the first synchronization module, the second synchronization module and third synchronization module, solves and passes screen process sound intermediate frequency
Data and the nonsynchronous problem of video data.
2, the timestamp of data acquisition is added in audio data and video data by the first synchronization module, so that sound
Frequency is accordingly and video data has synchronous foundation when playing.
3, the identical audio data of timestamp and video data again package are realized by audio by the second synchronization module
The synchronization of data and video data in transmission process.
4, corresponding video is searched by timestamp according to the audio data for currently needing to play by third synchronization module
Data realize the synchronization of playing audio-fequency data and video data.
Although specific embodiments of the present invention have been described above, those familiar with the art should be managed
Solution, we are merely exemplary described specific embodiment, rather than for the restriction to the scope of the present invention, it is familiar with this
The technical staff in field should be covered of the invention according to modification and variation equivalent made by spirit of the invention
In scope of the claimed protection.
Claims (8)
1. a kind of wireless screen transmission sound intermediate frequency and video synchronization method, it is characterised in that: described method includes following steps:
Step S10, transmitting terminal acquisition audio data and video data do at the first synchronization audio data and video data
Reason, meanwhile, biography screen device is sent to after encoding to treated audio data and video data；
Step S20, it passes screen device and the second synchronization process is done to the audio data and video data that receive, and will treated sound
Frequency is accordingly and video data is sent to receiving end；
Step S30, third synchronization process is done to the audio data and video data that receive in receiving end, and to audio data with
And after video data is decoded, it is sent respectively to audio player and video player plays out.
2. wireless screen transmission sound intermediate frequency as described in claim 1 and video synchronization method, it is characterised in that: the step S10 tool
Body are as follows:
Step S11, after transmitting terminal has acquired audio data and video data, number is added in audio data and video data
According to the timestamp of acquisition, the first synchronization process is done；
Step S12, transmitting terminal encodes audio data and video data that timestamp is added；
Step S13, transmitting terminal by after coding audio data and video data be sent to biography screen device.
3. wireless screen transmission sound intermediate frequency as described in claim 1 and video synchronization method, it is characterised in that: the step S20 tool
Body are as follows:
Step S21, after biography screen device has received audio data and video data, by the identical audio data of timestamp and video
Data package again, does the second synchronization process；
Step S22, it passes screen device and the audio data of package again and video data is sent to receiving end.
4. wireless screen transmission sound intermediate frequency as described in claim 1 and video synchronization method, it is characterised in that: the step S30 tool
Body are as follows:
Step S31, after receiving end has received audio data and video data, according to the audio data for currently needing to play, lead to
It crosses timestamp and searches corresponding video data, do third synchronization process；
Step S32, receiving end is played out corresponding player is sent to after audio data and video data decoding.
5. a kind of wireless screen transmission sound intermediate frequency and video synchronizing system, it is characterised in that: the system comprises following modules:
Audio-video collection module acquires audio data and video data for transmitting terminal, to audio data and video data
The first synchronization process is done, meanwhile, biography screen device is sent to after encoding to treated audio data and video data；
Audio-video passes panel module, does the second synchronization process to the audio data and video data that receive for passing screen device, and
Treated audio data and video data are sent to receiving end；
Audio and video playing module does third synchronization process to the audio data and video data that receive for receiving end, and
After being decoded to audio data and video data, it is sent respectively to audio player and video player plays out.
6. wireless screen transmission sound intermediate frequency as claimed in claim 5 and video synchronizing system, it is characterised in that: the audio-video collection
Module specifically includes:
After adding timestamp unit, having acquired audio data and video data for transmitting terminal, in audio data and video counts
According to the timestamp of middle addition data acquisition, the first synchronization process is done；
Coding unit encodes audio data and video data that timestamp is added for transmitting terminal；
Coding audio-visual transmission unit, for transmitting terminal by after coding audio data and video data be sent to biography screen device.
7. wireless screen transmission sound intermediate frequency as claimed in claim 5 and video synchronizing system, it is characterised in that: the audio-video passes screen
Module specifically includes:
After transmitting synchronization unit, having received audio data and video data for biography screen device, by the identical audio number of timestamp
Accordingly and video data package again, the second synchronization process is done；
It passes screen device data transmission unit, the audio data of package again and video data is sent to reception for passing screen device
End.
8. wireless screen transmission sound intermediate frequency as claimed in claim 5 and video synchronizing system, it is characterised in that: the audio and video playing
Module specifically includes:
After playing synchronization unit, having received audio data and video data for receiving end, according to the sound for currently needing to play
Frequency evidence searches corresponding video data by timestamp, does third synchronization process；
Audio/video decoding broadcast unit will be sent to corresponding broadcasting after audio data and video data decoding for receiving end
Device plays out.
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|---|---|
| CN109257641B (en) | 2021-03-16 |
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