CN102438144A - Video transmission method - Google Patents
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- CN102438144A CN102438144A CN2011103720513A CN201110372051A CN102438144A CN 102438144 A CN102438144 A CN 102438144A CN 2011103720513 A CN2011103720513 A CN 2011103720513A CN 201110372051 A CN201110372051 A CN 201110372051A CN 102438144 A CN102438144 A CN 102438144A
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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 technological 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 said 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 said band view data is carried out encoding process; C. the packet after will handling is sent to receiving terminal, is decoded and the image recovery by said receiving terminal.This scheme is organized into a plurality of bands through the basic element macro block with video sequence in the video data stream; And view data is carried out encoding process based on this level of band; 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 will obtain smoothness, 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 mainly is able to solve through 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 carry out compression memory; 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, 16 the color figure places in middle image quality zone and the zone employing of low image quality.
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, the size and the position in said different zone can set up on their own, when transmission conditions are better, increase the ratio that the high image quality zone accounts for overall area, 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 blocks during transmission, the multiframe subgraph is arranged in each video blocks, 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 region with video image; It is unit that the image of then will be originally changing mode transfer according to line scanning, by frame changes into the district; Each district changes the video blocks transmission mode of mode transfer according to frame in line scanning in the district and the district, generates the video blocks that a series of times are less than or equal to 0.5 second, the video blocks that is of a size 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 blocks contrast that is stored in first memory module; If new video piece and historical video blocks are inconsistent; Then first memory module is numbered and be stored to the new video piece becomes historical video blocks, sends the new video piece that has numbering simultaneously.The numbering of only sending historical video blocks if the new video piece is consistent with historical video blocks is not transmitted the practical video data;
Step c, receiver module receive the data that the contrast module is sent, and are when having the new video piece of numbering when what receive, this video blocks is passed to the form restoration module simultaneously it is deposited in second memory module; When receive be the numbering of historical video blocks the time, from second memory module, extract corresponding video blocks 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 blocks.
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
Pass through embodiment below, and combine accompanying drawing, do further bright specifically technical scheme of the present invention.
Embodiment: a kind of video frequency transmitter, as shown in Figure 1, comprising:
Receiver module 4; Receive the data that contrast module 3 is sent; When what receive is when having the new video piece of numbering; This video blocks is passed to the form restoration module simultaneously it is deposited in second memory module 6, when receive be the numbering of historical video blocks the time, from second memory module 6, extract corresponding video blocks and pass to form restoration module 5 according to numbering;
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 blocks subregions, and the duration of each video blocks is 0.5 second, and each video blocks 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 blocks in each video blocks and first memory module 2; If find identical video blocks; Then send the numbering of historical video blocks and give receiver module 4, with this historical video blocks residing position in picture in addition of numbering together transmission.If contrast module 3 does not find the historical video blocks identical with the new video piece in first memory module 2; Then with the new video block number and be stored in first memory module 2 and become historical video blocks, the new video piece that will have numbering then sends to receiver module 4.Can store 10000 historical video blocks (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 blocks in picture, ordering from top to bottom, first behavior, 00 to 09, the second behavior 10 to 19; The third line is 20 to 29, and fourth line is 30 to 39, and 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.
Receiver module 4 receives has two kinds of data, and a kind of is the new video piece that has numbering, and another kind is a numbering and the combination of position.When what receive is when having the new video piece of numbering, the new video piece to be stored to second memory module 6.The memory space of second memory module 6 is identical with first memory module 2, also is to store 10000 video blocks.What receive when receiver module 4 is numbering during with the combination of position, just from second memory module 6, extracts video blocks.The video blocks that receiver module 4 receives and extracts all sends to form restoration module 5, will be that the video data of unit is converted into traditional video data according to row, frame pattern transmission with the district by form restoration module 5.
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, with the data that preferentially transmit the first area, transmit the data of second area then during transmission, 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 when bandwidth is narrower, reducing the area in first district.
Specific embodiment described herein only is that the present invention's spirit is illustrated.Person of ordinary skill in the field of the present invention can make various modifications or replenishes 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 blocks, 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; It all is contrary with spirit of the present invention being construed to any additional restriction to them.
Claims (6)
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 carry out compression memory; 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.
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, the size and the position in said different zone can set up on their own, when transmission conditions are better, increases the ratio that the high image quality zone accounts for overall area, 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 video blocks as unit of transfer, the multiframe subgraph is arranged in the video blocks, subgraph adopts the line scanning mode.
6. according to claim 1 or 2 or 3 or 4 or 5 described video transmission methods, it is characterized in that, may further comprise the steps:
Step a, in video sending end; The zonal coding module is divided into several region with video image; It is unit that the image of then will be originally changing mode transfer according to line scanning, by frame changes into the district; Each district changes the video blocks transmission mode of mode transfer according to frame in line scanning in the district and the district, generates a series of times to be less than or equal to 0.5 second, to be of a size of the video blocks 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 blocks contrast that is stored in first memory module; If new video piece and historical video blocks are inconsistent; Then first memory module is numbered and be stored to the new video piece and become historical video blocks; Send the new video piece that has numbering simultaneously, only send the numbering of historical video blocks if the new video piece is consistent with historical video blocks;
Step c, receiver module receive the data that the contrast module is sent; When what receive is when having the new video piece of numbering; This video blocks is passed to the form restoration module to be deposited it in second memory module in simultaneously; When receive be the numbering of historical video blocks the time, from second memory module, extract corresponding video blocks 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 blocks, adopt the scarce part of method polishing of interpolation.
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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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| CN102438144A true CN102438144A (en) | 2012-05-02 |
| CN102438144B CN102438144B (en) | 2013-09-25 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1305684A (en) * | 1998-06-18 | 2001-07-25 | 艾利森电话股份有限公司 | Method and apparatus in transmission of images |
| CN1428939A (en) * | 2001-12-25 | 2003-07-09 | 松下电器产业株式会社 | Video coder |
| CN101102495A (en) * | 2007-07-26 | 2008-01-09 | 武汉大学 | A video image decoding and encoding method and device based on area |
| CN101167365A (en) * | 2005-03-09 | 2008-04-23 | 高通股份有限公司 | Region-of-interest processing for video telephony |
| CN101217652A (en) * | 2007-12-26 | 2008-07-09 | 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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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1305684A (en) * | 1998-06-18 | 2001-07-25 | 艾利森电话股份有限公司 | Method and apparatus in transmission of images |
| CN1428939A (en) * | 2001-12-25 | 2003-07-09 | 松下电器产业株式会社 | Video coder |
| CN101167365A (en) * | 2005-03-09 | 2008-04-23 | 高通股份有限公司 | Region-of-interest processing for video telephony |
| CN101102495A (en) * | 2007-07-26 | 2008-01-09 | 武汉大学 | A video image decoding and encoding method and device based on area |
| CN101217652A (en) * | 2007-12-26 | 2008-07-09 | 武汉大学 | An image information recording and extracting method in the process of the encoding and decoding of video images |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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