CN102438144B - Video transmission method - Google Patents
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- CN102438144B CN102438144B CN 201110372051 CN201110372051A CN102438144B CN 102438144 B CN102438144 B CN 102438144B CN 201110372051 CN201110372051 CN 201110372051 CN 201110372051 A CN201110372051 A CN 201110372051A CN 102438144 B CN102438144 B CN 102438144B
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Abstract
The invention relates to a video transmission method, which aims to decrease an occupied bandwidth. The video transmission method comprises the following steps of: dividing video data into a plurality of areas according to a picture, and performing video recording by taking the area as a unit to form video blocks; performing by-the-block scanning rather than intra-frame by-the-line scanning; performing compression by adopting different parameters for different areas; and in transmission, preferably transmitting the areas adopting high-picture quality parameters, then transmitting areas adopting medium-picture quality parameters and finally transmitting areas adopting low-picture quality parameters, wherein the different parameters comprise bit depths and frames per second. New video blocks are compared with historical video blocks to determine whether to transmit the new video blocks or only to inform a receiver of adopting the historical video blocks. By the scheme, the occupied bandwidth is decreased, and transmission time is shortened. The video transmission method is applied to video transmission places such as video telephones, video conferences and the like.
Description
Technical field
The present invention relates to a kind of computer data transmission technology, especially relate to a kind of video transmission method.
Background technology
The Application of Technology such as video telephone, video conference more and more widely, but the data volume of vision signal is big, long Distance Transmission requires high to network broadband, this is the network teleconference, a technology barrier of video telephony applications.
State Intellectual Property Office of the People's Republic of China discloses the patent documentation that name is called a kind of video transmission method, system and equipment on 03 05th, 2008, publication number is CN101137060.Disclosed video transmission method may further comprise the steps in the document: the video data stream that the A. receiving end/sending end sends, and described video data stream is made up of video sequence; B. the basic element macro block with video sequence is organized into band associated with each other, and based on described band to the view data processing of encoding; C. the packet after will handling is sent to receiving terminal, is decoded and the image recovery by described receiving terminal.This scheme is organized into a plurality of bands by the basic element macro block with video sequence in the video data stream, and based on this level of band to the view data processing of encoding, data after will handling then send to receiving terminal, can solve the problem that occurs packet loss or packet error in the transmission course to a certain extent, but the smoothness of obtaining, normal result of broadcast still need the bigger network bandwidth, less delay.
Summary of the invention
The present invention solves the technical problem that existing in prior technology video data occupied bandwidth is big, real-time is had relatively high expectations, and a kind of occupied bandwidth is little, delay is low, data volume is adjustable video frequency transmitter and method are provided.
The present invention is directed to above-mentioned technical problem is mainly solved by following technical proposals: a kind of video transmission method, video data is divided into several zones according to picture, and different zones adopts different parameters to compress storage; Prioritised transmission adopts the high image quality zone of high image quality parameter during transmission, and the middle image quality zone of medium image quality parameter is adopted in transmission then, and the low image quality zone of low image quality parameter is adopted in transmission at last.
As preferably, described parameter comprises the color figure place, and 24 color figure places are adopted in the high image quality zone, middle image quality zone and 16 color figure places of low image quality zone employing.
As preferably, described parameter comprises number of pictures per second, and the high image quality zone is per second 30 frames, middle image quality zone is per second 20 frames, low image quality zone is per second 10 frames, and receiving terminal receives and plays frame number when data are decoded reduction is 30 frames, adopts the method polishing of interpolation to lack part.
As preferably, size and the position in described different zone can set up on their own, increase the ratio that the high image quality zone accounts for overall area when transmission conditions are better, reduce the ratio that low image quality district accounts for overall area; When transmission conditions are bad, reduce the ratio that the high image quality zone accounts for overall area, increase the ratio that low image quality zone accounts for overall area.
As preferably, be unit of transfer with the video piece during transmission, in each video piece the multiframe subgraph is arranged, subgraph adopts the line scanning mode, rather than with the expert scan mode transmission of view picture frame.
As preferably, video transmission method of the present invention may further comprise the steps:
Step a, in video sending end, the zonal coding module is divided into several districts with video image, it is unit that the image of then will be original changing mode transfer according to line scanning, frame by frame changes into distinguishing, each district changes the video block transfer mode of mode transfer according to frame in line scanning in the district and the district, generate the video piece that a series of times are less than or equal to 0.5 second, the video piece that is of a size of the size in district, the image quality in each district can be different according to its position;
Step b, contrast module are with zonal coding module the new video piece that sends over and each the historical video piece contrast that is stored in first memory module, if new video piece and historical video piece are inconsistent, then the new video piece being numbered and being stored to first memory module becomes historical video piece, sends the new video piece that has numbering simultaneously.The numbering that only sends historical video piece if the new video piece is consistent with historical video piece is not transmitted the practical video data;
Step c, receiver module receive the data that the contrast module sends, and are when having the new video piece of numbering when what receive, this video piece is passed to the form restoration module it is deposited in second memory module simultaneously; When receive be the numbering of historical video piece the time, from second memory module, extract corresponding video piece and pass to the form restoration module according to numbering;
Steps d, video restoration module will be that the video data of unit is converted into traditional video data with line scanning, the frame unit of being replaced by with the video piece.
The substantial effect that the present invention brings is, the bandwidth that transmitting video data is needed reduces, and postpones lowly, and fluency is good.
Description of drawings
Fig. 1 is a kind of structural representation of device that the present invention adopts;
Among the figure: 1, zonal coding module, 2, first memory module, 3, the contrast module, 4, receiver module,
5, form restoration module, 6, second memory module.
Embodiment
Below by embodiment, and by reference to the accompanying drawings, technical scheme of the present invention is described in further detail.
Embodiment: a kind of video frequency transmitter as shown in Figure 1, comprising:
Second memory module 6 is used for the new video piece of all band numberings that storage receiver module 4 receives;
The vision signal that zonal coding module 1 obtains camera is carried out subregion and coding, sends contrast module 3 then to.The whole image size is 600 * 400 pixels, be that a zone is divided into according to per 60 * 40 pixels is 100 video piece subregions, and the duration of each video piece is 0.5 second, and each video piece is encoded according to the pattern of the frame in the Hang He district in the district.When first data of 0.5 second were come, the data number that contrast module 3 is regional with each also was stored to first memory module 2.When receiving follow-up picture when decomposing the new video piece that coding obtains, contrast module 3 compares existing historical video piece in each video piece and first memory module 2, if find identical video piece, then send the numbering of historical video piece to receiver module 4, with this historical video piece residing position in picture that also has of numbering together transmission.If contrast module 3 does not find the historical video piece identical with the new video piece in first memory module 2, then with the new video block number and be stored in and become historical video piece in first memory module 2, the new video piece that will have numbering then sends to receiver module 4.Can store 10000 historical video pieces (can store the video data in 5 seconds altogether, can there be 10 kinds of 0.5 second different historical records in each zone) in first memory module 2 altogether.Numbering adopts the time be accurate to millisecond to number as non-repeatability, with video zero hour be zero-time.Adopt from left to right the position of video piece in picture, ordering from top to bottom, first behavior 00 to 09, second behavior 10 to 19, the third line is 20 to 29, fourth line is 30 to 39, fifth line is 40 to 49, the 6th behavior 50 to 59, the seven behaviors 60 to 69, the eight behaviors 70 to 79, the 9th behavior 80 to 89, the ten behaviors 90 to 99.
In general video telephone, the video conference, people's face all is positioned at the centre position, and the picture location prominence of keeping to the side is lower.Position Number is 24 color figure places of 24 zone employings of 23 to 26,33 to 36,43 to 46,53 to 56,63 to 66,73 to 76, and all the other zones are compressed to 16 color figure places, reduce data volume.
Position Number is that 24 zones of 23 to 26,33 to 36,43 to 46,53 to 56,63 to 66,73 to 76 are first district, and picture is per second 30 frames; Position Number is that 40 zones of 11 to 18,21,22,27,28,31,32,37,38,41,42,47,48,51,52,57,58,61,62,67,68,71,72,77,78,81 to 88 are second largest district, and picture is per second 20 frames; All the other zones are the third-largest district, and picture is per second 10 frames.Make that so also data quantity transmitted reduces.When going back original picture, the receiver module decoding adopt the method polishing of interpolation to lack part.
In order to guarantee that significant points can in time transmit, will preferentially transmit the data of first area during transmission, transmit the data of second area then, the data priority in the 3rd zone is minimum.
The size of each Da Qu of picture and position can freely be set, to satisfy different bandwidth conditions and demand, as can reduce the area in first district when bandwidth is narrower.
Specific embodiment described herein only is that the present invention's spirit is illustrated.Those skilled in the art can make various modifications or replenish or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present invention or surmount the defined scope of appended claims.
Although this paper has used terms such as video piece, contrast module morely, do not get rid of the possibility of using other term.Using these terms only is in order to describe and explain essence of the present invention more easily; They are construed to any additional restriction all is contrary with spirit of the present invention.
Claims (5)
1. a video transmission method is characterized in that, video data is divided into several zones according to picture, and different zones adopts different parameters to compress storage; Prioritised transmission adopts the high image quality zone of high image quality parameter during transmission, the middle image quality zone of image quality parameter during transmission is adopted then, and the low image quality zone of low image quality parameter is adopted in transmission at last;
Video transmission method may further comprise the steps:
Step a, in video sending end, the zonal coding module is divided into several districts with video image, it is unit that the image of then will be original changing mode transfer according to line scanning, frame by frame changes into distinguishing, each district changes the video block transfer mode of mode transfer according to frame in line scanning in the district and the district, generating a series of times is less than or equal to 0.5 second, is of a size of the video piece of the size in district, and the image quality in each district can be different according to its position;
Step b, contrast module are with zonal coding module the new video piece that sends over and each the historical video piece contrast that is stored in first memory module, if new video piece and historical video piece are inconsistent, then the new video piece is numbered and is stored to first memory module and become historical video piece, send the new video piece that has numbering simultaneously, only send the numbering of historical video piece if the new video piece is consistent with historical video piece;
Step c, receiver module receive the data that the contrast module sends, be when having the new video piece of numbering when what receive, this video piece is passed to the form restoration module to be deposited it in second memory module simultaneously, when receive be the numbering of historical video piece the time, from second memory module, extract corresponding video piece and pass to the form restoration module according to numbering;
Steps d, video restoration module will be that the video data of unit is converted into traditional video data with line scanning, the frame unit of being replaced by with the video piece, adopt the scarce part of method polishing of interpolation.
2. video transmission method according to claim 1 is characterized in that, described parameter comprises the color figure place, and 24 color figure places are adopted in the high image quality zone, and 16 color figure places are adopted in middle image quality zone and low image quality zone.
3. video transmission method according to claim 1, it is characterized in that, described parameter comprises number of pictures per second, the high image quality zone is per second 30 frames, middle image quality zone is per second 20 frames, low image quality zone is per second 10 frames, and receiving terminal receives and plays frame number when data are decoded reduction is 30 frames, adopts the method polishing of interpolation to lack part.
4. video transmission method according to claim 1 is characterized in that, size and the position in described different zone can set up on their own, increases the ratio that the high image quality zone accounts for overall area when transmission conditions are better, reduces the ratio that low image quality district accounts for overall area; When transmission conditions are bad, reduce the ratio that the high image quality zone accounts for overall area, increase the ratio that low image quality zone accounts for overall area.
5. video transmission method according to claim 1 is characterized in that, during transmission with the video piece as unit of transfer, the multiframe subgraph is arranged in the video piece, subgraph adopts the line scanning mode.
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| CN 201110372051 CN102438144B (en) | 2011-11-22 | 2011-11-22 | Video transmission method |
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| CN 201110372051 CN102438144B (en) | 2011-11-22 | 2011-11-22 | Video transmission method |
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| CN102438144B true CN102438144B (en) | 2013-09-25 |
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| CN107529064A (en) * | 2017-09-04 | 2017-12-29 | 北京理工大学 | A kind of self-adaptive encoding method based on VR terminals feedback |
| CN116761023A (en) * | 2023-07-04 | 2023-09-15 | 唯科终端技术(东莞)有限公司 | Video transmission method between different devices |
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| SE521021C2 (en) * | 1998-06-18 | 2003-09-23 | Ericsson Telefon Ab L M | Method and apparatus for transmitting images |
| JP4153202B2 (en) * | 2001-12-25 | 2008-09-24 | 松下電器産業株式会社 | Video encoding device |
| CN101167365A (en) * | 2005-03-09 | 2008-04-23 | 高通股份有限公司 | Region-of-interest processing for video telephony |
| CN101102495B (en) * | 2007-07-26 | 2010-04-07 | 武汉大学 | A video image decoding and encoding method and device based on area |
| CN101217652B (en) * | 2007-12-26 | 2010-09-29 | 武汉大学 | An image information recording and extracting method in the process of the encoding and decoding of video images |
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