CN103414865A - Method and system for transmitting audio and video through power line - Google Patents
Method and system for transmitting audio and video through power line Download PDFInfo
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- CN103414865A CN103414865A CN2013103139596A CN201310313959A CN103414865A CN 103414865 A CN103414865 A CN 103414865A CN 2013103139596 A CN2013103139596 A CN 2013103139596A CN 201310313959 A CN201310313959 A CN 201310313959A CN 103414865 A CN103414865 A CN 103414865A
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Abstract
The invention discloses a method and system for transmitting audio and video through a power line, and relates to the technical field of signal transmission. An audio signal and a video signal are coded into a network signal, the network signal is carried on the power line, and after being received by a receiving unit, the network signal is decoded into an audio and video signal. By means of the method and system for transmitting the audio and video through the power line, HDMI videos can be effectively transmitted in the power line in a family.
Description
Technical field
The present invention relates to a kind of signal transmission technology, relate in particular to a kind of method and system of power line transmission sound video.
Background technology
The power line communication full name is power line carrier (Power Line Cartier-PLC) communication, refers to and utilizes high-voltage power line (being often referred to 35kV and above in the power carrier field), medium voltage power line (referring to the 10kV electric pressure) or low-voltage distribution wire (380/220V subscribers feeder) as information transmitting medium, to carry out a kind of specific communication mode of voice or transfer of data.The advantage of this technology maximum is not need rewiring on existing electric wire, to realize the carrying of data service.。The high-voltage power line ZAP has broken through the restriction that only limits to the single-chip microcomputer application, has entered digital times.And along with the development of power line carrier technology and social needs, in/situation in the ascendant also appearred in the technological development of low voltage electric power carrier communication and application.
Simultaneously, aspect multimedia audio-visual, people are more and more higher to the quality requirement of video/audio, the technology such as the HDMI that has been born thus (HDMI (High Definition Multimedia Interface)), and how by transmission in the smooth smooth power line in the family of HDMI interface video/audio, to be also the target that people study.
Summary of the invention
The main technical problem to be solved in the present invention is, a kind of method and system of power line transmission sound video are provided, and it can realize transmitting in HDMI interface video power line in the family.
For solving the problems of the technologies described above, the invention provides a kind of method of power line transmission sound video, its method step is: transmitting terminal receiver, video and audio signal; The transmitting terminal compressed encoding is processed described Audio and Video signal; Transmitting terminal becomes network signal by the Audio and Video signal coding; Transmitting terminal by described network signal carrier wave on power line; Receiving terminal receives described network signal from power line; Receiving terminal becomes the Voice & Video signal to the network signal decoding; The described Audio and Video signal of reduction is processed in the receiving terminal decoding; Receiving terminal output video and audio signal.
The compressed encoding processing procedure of described transmitting terminal and receiving terminal decoding process, adopt MJPEG, MPEG4 or H.264 form carry out coding and decoding video.
Described transmitting terminal is by when described network signal carrier wave is on power line, transmitting terminal is monitored the power line interference situation, and according to the corresponding compression ratio of adjusting the data in the described Audio and Video signal process of described transmitting terminal compressed encoding processing of disturbed condition.
Described transmitting terminal compressed encoding is processed the compression ratio of the data in described Audio and Video signal process, is with the described power line interference degree monitored the relation of being inversely proportional to.
The present invention also provides a kind of system of power line transmission sound video, comprises transmitter unit and receiving element;
Described transmitter unit comprises: for the digital video signal interface of receiver, video and audio signal, for compressed encoding, process the videl signal compressed encoding module of described Audio and Video signal, for further the Audio and Video signal coding being become to the modular converter of network signal, for the carrier wave transmission processing module on power line by described network signal carrier wave;
Described receiving element comprises: for from power line, receiving the carrier wave receiving processing module of described network signal, for the network signal decoding being become to the recovery module of the network signal of Voice & Video signal, for decoding, process the videl signal decoder module of the described Audio and Video signal of reduction, for the digital video signal interface of output video and audio signal.
Described videl signal compressed encoding module, be MJPEG, MPEG4 or video code and decode technology chip H.264.
Described videl signal decoder module, be MJPEG, MPEG4 or video code and decode technology chip H.264.
Described transmitter unit also comprises: for the interference detection module that the power line interference situation is monitored, and for according to interference detection module Monitoring Data value inverse proportion, automatically adjusting the adjustment module of the data compression ratio of described videl signal compressed encoding module signal processing procedure.
Digital video signal interface in described transmitter unit and described receiving element is the HDMI interface.
The invention has the beneficial effects as follows: a kind of method and system of power line transmission sound video, it becomes network signal by the Audio and Video signal coding, then the network signal carrier wave on power line; After receiving unit receives network signal, the network signal decoding is become to the audio frequency and video signal; Effect realizes transmitting in HDMI interface video power line in the family.
Further, transmitting terminal at signal transmission simultaneously, is monitored the power line interference situation, and, according to the corresponding data compression ratio of adjusting of disturbed condition, further improves visual fluency.
The accompanying drawing explanation
Fig. 1 is the emission fundamental diagram of a kind of embodiment of the inventive method;
Fig. 2 is reception fundamental diagram corresponding embodiment illustrated in fig. 1;
Fig. 3 is the transmitter module structural representation of a kind of embodiment of system of the present invention;
Fig. 4 is receiver module structural representation corresponding embodiment illustrated in fig. 3.
Embodiment
Below by embodiment, by reference to the accompanying drawings the present invention is described in further detail.
The design of present technique is particularly suitable for the HDMI interface videos such as the 1080P of current main flow, 1080 works, 720P are transmitted in smooth power line in the family smoothly.Wherein, reach smooth transmission high-definition program will have efficient video code and decode technology chip except will ensureing the data smoothness, therefore employing MJPE6, MPEG4, H.264 wait the main flow coding and decoding.We adopt the data traffic monitoring technology to adjust the compression ratio of video code and decode aspect guarantee video smoothness, reach the smooth purpose of image.
With reference to Fig. 1 Fig. 2, a kind of method of power line transmission sound video, the method step is: transmitting terminal receiver, video and audio signal; The transmitting terminal compressed encoding is processed described Audio and Video signal; Transmitting terminal becomes network signal by the Audio and Video signal coding; Transmitting terminal by described network signal carrier wave on power line;
Receiving terminal receives described network signal from power line; Receiving terminal becomes the Voice & Video signal to the network signal decoding; The described Audio and Video signal of reduction is processed in the receiving terminal decoding; Receiving terminal output video and audio signal.
During enforcement, the compressed encoding processing procedure of described transmitting terminal and receiving terminal decoding process, adopt MJPEG, MPEG4 or H.264 form carry out coding and decoding video.
During enforcement, described transmitting terminal is by when described network signal carrier wave is on power line, transmitting terminal is monitored the power line interference situation, and according to the corresponding compression ratio of adjusting the data in the described Audio and Video signal process of described transmitting terminal compressed encoding processing of disturbed condition.
During enforcement, described transmitting terminal compressed encoding is processed the compression ratio of the data in described Audio and Video signal process, is with the described power line interference degree monitored the relation of being inversely proportional to.
Shown in Figure 4 with reference to Fig. 3, a kind of system of power line transmission sound video, comprise transmitter unit and receiving element;
Described transmitter unit comprises: for the digital video signal interface of receiver, video and audio signal, for compressed encoding, process the videl signal compressed encoding module of described Audio and Video signal, for further the Audio and Video signal coding being become to the modular converter of network signal, for the carrier wave transmission processing module on power line by described network signal carrier wave;
Described receiving element comprises: for from power line, receiving the carrier wave receiving processing module of described network signal, for the network signal decoding being become to the recovery module of the network signal of Voice & Video signal, for decoding, process the videl signal decoder module of the described Audio and Video signal of reduction, for the digital video signal interface of output video and audio signal.
During enforcement, described videl signal compressed encoding module, be MJPEG, MPEG4 or video code and decode technology chip H.264.
During enforcement, described videl signal decoder module, be MJPEG, MPEG4 or video code and decode technology chip H.264.
During enforcement, described transmitter unit also comprises: for the interference detection module that the power line interference situation is monitored, and for according to interference detection module Monitoring Data value inverse proportion, automatically adjusting the adjustment module of the data compression ratio of described videl signal compressed encoding module signal processing procedure.
During enforcement, the digital video signal interface in described transmitter unit and described receiving element is the HDMI interface.
Preferred embodiment as the method for a kind of power line transmission sound video as described in Fig. 1 Fig. 2: the method step is:
Transmitting terminal receives from the Audio and Video signal of HDMI coding high-definition program input; The transmitting terminal compressed encoding is processed described Audio and Video signal, can carry out data encryption in this processing procedure, and video is edited and interviewed with MJPEG, MPEG4 or form H.264; Transmitting terminal becomes network signal by the Audio and Video signal coding; Transmitting terminal is by described network signal (procotol signal) carrier wave on power line, and this process comprises filtering and transport process (as Fig. 1).
Receiving terminal is processed described network signal (procotol signal) from power line reception/filtering; Receiving terminal becomes Voice & Video signal (digital signal) to the network signal decoding; The described Audio and Video signal of reduction is processed in receiving terminal decoding, can correspondence comprise the data deciphering process in this processing procedure, video decode corresponding aforementioned employing MJPEG, MPEG4 or form H.264; Receiving terminal is from HDMI decoding high-definition program output video and audio signal.
When this embodiment implements, further, transmitting terminal is by when described network signal carrier wave is on power line, transmitting terminal can be monitored the power line interference situation, and according to the corresponding compression ratio of adjusting the data in the described Audio and Video signal process of described transmitting terminal compressed encoding processing of disturbed condition.Described transmitting terminal compressed encoding is processed the compression ratio of the data in described Audio and Video signal process, is with the described power line interference degree monitored the relation of being inversely proportional to.
As shown in Figure 4 as Fig. 3, a kind of preferred embodiment of system of power line transmission sound video, comprise transmitter unit and receiving element.Described transmitter unit comprises: HDMI coding high-definition program input port; For connecting the digital video signal interface of Audio and Video signal of HDMI port; For compressed encoding, process the videl signal compressed encoding module of described Audio and Video signal; For further the Audio and Video signal coding being become to the modular converter (digital signal converts network signal to) of network signal, the modular converter corresponding matching has the control signal module; For the carrier wave transmission processing module on power line by described network signal carrier wave; Wherein carrier wave transmission processing module comprises network signal module and MAC position module, power line carrier processing module, filtration module, carrier data delivery module, and be arranged on the digital signal analog signal modular converter between power line carrier processing module and filtration module.
Described receiving element comprises: for from power line, receiving the carrier wave receiving processing module of described network signal, carrier wave transmission processing module comprises carrier data delivery module, filtration module, power line carrier processing module, network signal module and MAC position module, and is arranged on the digital signal analog signal modular converter that power line carrier processing module and filtration module are asked; For the network signal decoding being become to the recovery module of the network signal of Voice & Video signal, the modular converter corresponding matching has the control signal module; For decoding, process the videl signal decoder module of the described Audio and Video signal of reduction; Digital video signal interface for output video and audio signal; For connecting the HDMI coding high-definition program output port of digital videl signal interface output.
When this embodiment implemented, further, described videl signal compressed encoding module, be MJPEG, MPEG4 or video code and decode technology chip H.264.Corresponding videl signal decoder module, be MJPEG, MPEG4 or video code and decode technology chip H.264.
When this embodiment implements, further, transmitter unit also comprises: for the interference detection module that the power line interference situation is monitored, and for the adjustment module of the compression ratio of the data of automatically adjusting described videl signal compressed encoding module signal processing procedure according to interference detection module Monitoring Data value inverse proportion.
The present invention has 2 characteristics, the one, the Audio and Video signal coding becomes network signal, then the network signal carrier wave on power line.After receiving unit receives network signal, the network signal decoding is become to the audio frequency and video signal.Second characteristic are that we have adopted MJPEG, MPEG4, have H.264 waited the main flow coding and decoding video.The 3rd characteristics are that we have adopted our distinctive video data monitoring and automatic delta data compression ratio by own.In the large situation of power line interference, in fact the data of transmission are that fluctuation is arranged, and in this situation, our transmission system will detect interference automatically, and automatically adjust the compression ratio of video, reach the transmission of video smoothness.
Above content is in conjunction with concrete execution mode further description made for the present invention, can not assert that specific embodiment of the invention is confined to these explanations.For the general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, can also make some simple deduction or replace, all should be considered as belonging to protection scope of the present invention.
Claims (9)
1. the method for a power line transmission sound video is characterized in that the method step is:
Transmitting terminal receiver, video and audio signal;
The transmitting terminal compressed encoding is processed described Audio and Video signal;
Transmitting terminal becomes network signal by the Audio and Video signal coding;
Transmitting terminal by described network signal carrier wave on power line;
Receiving terminal receives described network signal from power line;
Receiving terminal becomes the Voice & Video signal to the network signal decoding;
The described Audio and Video signal of reduction is processed in the receiving terminal decoding;
Receiving terminal output video and audio signal.
2. the method for power line transmission sound video as claimed in claim 1, is characterized in that, the compressed encoding processing procedure of described transmitting terminal and receiving terminal decoding process, adopt MJPEG, MPEG4 or H.264 form carry out coding and decoding video.
3. the method for power line transmission sound video as claimed in claim 1 or 2, it is characterized in that, described transmitting terminal is by when described network signal carrier wave is on power line, transmitting terminal is monitored the power line interference situation, and according to the corresponding compression ratio of adjusting the data in the described Audio and Video signal process of described transmitting terminal compressed encoding processing of disturbed condition.
4. the method for power line transmission sound video as claimed in claim 3, is characterized in that, described transmitting terminal compressed encoding is processed the compression ratio of the data in described Audio and Video signal process, is with the described power line interference degree monitored the relation of being inversely proportional to.
5. the system of a power line transmission sound video, is characterized in that, comprises transmitter unit and receiving element;
Described transmitter unit comprises: for the digital video signal interface of receiver, video and audio signal, for compressed encoding, process the videl signal compressed encoding module of described Audio and Video signal, for further the Audio and Video signal coding being become to the modular converter of network signal, for the carrier wave transmission processing module on power line by described network signal carrier wave;
Described receiving element comprises: for from power line, receiving the carrier wave receiving processing module of described network signal, for the network signal decoding being become to the recovery module of the network signal of Voice & Video signal, for decoding, process the videl signal decoder module of the described Audio and Video signal of reduction, for the digital video signal interface of output video and audio signal.
6. the system of power line transmission sound video as claimed in claim 5, is characterized in that, described videl signal compressed encoding module is MJPEG, MPEG4 or video code and decode technology chip H.264.
7. the system of power line transmission sound video as claimed in claim 5, is characterized in that, described videl signal decoder module is MJPEG, MPEG4 or video code and decode technology chip H.264.
8. as the system of the described power line transmission sound video of claim 5-7 any one, it is characterized in that, described transmitter unit also comprises: for the interference detection module that the power line interference situation is monitored, and for according to interference detection module Monitoring Data value inverse proportion, automatically adjusting the adjustment module of the data compression ratio of described videl signal compressed encoding module signal processing procedure.
9. the system of power line transmission sound video as claimed in claim 5, is characterized in that, the digital video signal interface in described transmitter unit and described receiving element is the HDMI interface.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013103139596A CN103414865A (en) | 2013-07-16 | 2013-07-16 | Method and system for transmitting audio and video through power line |
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| CN2013103139596A CN103414865A (en) | 2013-07-16 | 2013-07-16 | Method and system for transmitting audio and video through power line |
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| CN107241122A (en) * | 2017-04-28 | 2017-10-10 | 国网山东省电力公司寿光市供电公司 | A kind of video-signal transmission method based on power line |
| CN108449630A (en) * | 2018-04-09 | 2018-08-24 | 歌尔股份有限公司 | Audio synchronization method and system |
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Application publication date: 20131127 |