CN103037206A - Method and system of video transmission - Google Patents
Method and system of video transmission Download PDFInfo
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- CN103037206A CN103037206A CN2012105455324A CN201210545532A CN103037206A CN 103037206 A CN103037206 A CN 103037206A CN 2012105455324 A CN2012105455324 A CN 2012105455324A CN 201210545532 A CN201210545532 A CN 201210545532A CN 103037206 A CN103037206 A CN 103037206A
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Abstract
Provided are a method and a system of video transmission. The method includes the steps that frame pictures of a transmission video are acquired according to an original video; circumscribed polygons of displacement of moving objects and position information of the moving objects in the frame pictures are calculated; according to the position information, background pictures of the circumscribed polygons are collected, and moving objects videos of all frame pictures inside the circumscribed polygons are collected; and the video transmission is conducted according to the position information, the background pictures and the moving object videos. According to the method and the system of the video transmission, video data of the minimum region of the displacement of the moving objects of the transmission video are transmitted, images, except for the minimum region, only need to be transmitted for one time, transmission of the redundant data size of the background part is reduced, transmission data are effectively reduced, and speed and efficiency of the video transmission are improved.
Description
Technical field
The present invention relates to technical field of video processing, particularly relate to a kind of video transmission method and system.
Background technology
There is a large amount of redundant informations between the video image consecutive frame, in technical field of video processing, although H.264 standard has proposed a lot of advanced persons' video-frequency compression method to video, removed in the frame, a large amount of redundant information of interframe, but these compression methods are as cost take high computation complexity, and high algorithm complex has reduced compression, the decoding efficiency of video, has limited effect and the quality of the real-time Transmission of video.
Be in the patent documentation of CN102724492A at publication number, disclose a kind ofly from the two field picture of original video stream, extract respectively background image and moving image; The co-ordinate position information of moving image and correspondence thereof and background image and the corresponding frame position information thereof of extraction are sent; Receiving moving pictures and corresponding co-ordinate position information and background image and corresponding frame position information thereof thereof; Play moving image and the background image of described reception according to frame position information and co-ordinate position information.
But in actual applications, video image moves and has large-scale situation of movement, if when the scope of region of variation is larger, adopts this technology then can cause video data treating capacity and information capacity excessive, thereby reduces the efficiency of transmission of video image information.
Summary of the invention
Based on this, being necessary provides the higher video transmission method of a kind of efficiency of transmission and system for the problems referred to above.
A kind of video transmission method comprises the steps:
Obtain the frame picture of transmission of video according to original video;
Calculate external polygon and the positional information thereof of displacement of moving article in the described frame picture;
Extract the outer background picture of described external polygon and the moving object video of each the frame frame picture in the described external polygon according to described positional information;
Carry out transmission of video according to described positional information, background picture and described moving object video.
A kind of Video transmission system comprises:
Frame picture acquisition module is for the frame picture that obtains transmission of video according to original video;
The displacement range computing module is for external polygon and the positional information thereof of calculating described frame picture displacement of moving article;
The video data extraction module is used for extracting the outer background picture of described external polygon and the moving object video of each the frame frame picture in the described external polygon according to described positional information;
The video data transmitting module is used for carrying out transmission of video according to described positional information, background picture and described moving object video.
Above-mentioned video transmission method and system, the video data of the Minimum Area of the displacement of moving article of transmission of video is transmitted, image except this Minimum Area only needs transmission primaries, reduced the data volume of transmission background parts redundancy, effectively reduce the transmission of data, improved speed and the efficient of transmission of video.
Description of drawings
Fig. 1 is the video transmission method flow chart of an embodiment;
Fig. 2 is the schematic diagram of the external minimum rectangle of a displacement of moving article among the embodiment;
Fig. 3 is the external polygonal schematic diagram of a displacement of moving article among the embodiment;
Fig. 4 is the Video transmission system structural representation of an embodiment.
Embodiment
Be described in detail below in conjunction with the embodiment of accompanying drawing to video transmission method of the present invention.
Fig. 1 shows the video transmission method flow chart of an embodiment, mainly comprises the steps:
Step S10: the frame picture that obtains transmission of video according to original video.
In this step, mainly be by to original video (comprising the real-time video of various forms or the video of the local storage) processing of decoding, obtain the video data that transmits at transmitting terminal.
In one embodiment, for the constant original video of background parts, utilize corresponding decoding algorithm that it is decoded, obtain the continuous frame picture of some transmission of video.For example, transmit the video data of a video conference, because in this video conference, background parts is constant, then whole original video is processed as a transmission of video.
In another embodiment, for the original video that background parts changes, the original video that at first will need to transmit is decoded into continuous frame picture, and then the frame picture that these are continuous carries out segmentation, splits into the some sections frame pictures that transmission of video is corresponding.
Particularly, the situation of change of the background parts of the original video that transmits as required, with the constant one section video of background parts as least unit, image background variation partly by frame picture continuous before and after judging, the continuous frame picture that decoding is obtained is split as the some sections transmission of video that background parts is identical, and then utilizing the relative decoding method to decode, the frame picture of every section transmission of video comprises identical background picture.
By at transmitting terminal video being decoded, the continuous frame picture that must make new advances and the data of frame picture thereof can be judged the moving object scope of every frame frame picture, also can be directed to moving object and set new frame speed.
Step S20: external polygon and the positional information thereof of calculating displacement of moving article in the described frame picture.
In this step, mainly be to calculate in the whole section transmission of video, the scope of displacement of moving article in each frame frame picture, and calculate it with respect to the position parameter data of frame picture.
In one embodiment, the computational process of step S20 is as follows:
Step S201 identifies the moving object of described frame picture, and calculates the external minimum rectangle of described moving object in each frame frame picture.
Particularly, adopt relevant mathematical algorithm to identify frame by frame the moving object of frame picture, and the external minimum rectangle of calculating moving object in each frame frame picture, preferably, can adopt camshift algorithm or optical flow method to identify the moving object of frame picture, by the identification to moving object, determine its external minimum rectangle in the frame picture, be the scope of this moving object.
As shown in Figure 2, Fig. 2 is one section transmission of video that is made of three frame frame pictures, identifies moving object a1, a2 among Fig. 2 a, and the moving object b1 among Fig. 2 b, the moving object c1 among Fig. 2 c, dotted line frame are its external minimum rectangle.
Step S202, the external minimum rectangle in each frame frame picture superposeed obtains the external polygon of displacement of moving article.
Concrete, the external minimum rectangle of all moving object superposes on the frame picture with whole section transmission of video, can obtain the external polygon of all displacement of moving articles from the picture after the stack, is the displacement range of the moving object of transmission of video.
As shown in Figure 3, in the picture after the stack, moving object a1, a2, b1, the external polygon of the displacement of moving article that the external minimum rectangle (dotted line) of c1 forms, this polygon is made of several points and connecting line (adding heavy line) thereof.
Step S203 calculates described external polygon with respect to the positional information of background picture.
Concrete, the coordinate of the point of each drift angle of calculating polygon is determined these coordinates with respect to the coordinate parameters in the frame picture, determines that namely external polygon is with respect to the position parameter data of background picture.
Step S30: extract the outer background picture of described external polygon and the moving object video of each the frame frame picture in the described external polygon according to described positional information.
In this step, mainly be from every section transmission of video, to extract a width of cloth background picture data according to positional information, and from every frame frame picture, extract in the external polygon the moving object video data.
In one embodiment, the leaching process of step S30 is as follows:
Step S301 obtains background content except described external polygon according to described positional information from the described frame picture of some frames.
Particularly, according to described positional information, the background content from some frame frame pictures outside the described external polygon of intercepting obtains the background content of multiframe frame picture.
Step S302, the described background content of obtaining superposeed obtains the background picture of described transmission of video.
Particularly, the above-mentioned background content is superposeed, obtain a width of cloth and merge picture, this fusion picture is the background picture of transmission of video.
Need to prove, except aforesaid way, can also adopt other image processing method to obtain the background picture of transmission of video.
Step S303 extracts moving object frame picture in the described external polygon according to described positional information from the described frame picture of every frame.
Step S304 becomes the moving object video with the picture compression of described moving object frame.
As an embodiment, become the process of moving object video can be as follows each frame picture compression in the described external polygon:
Convert external polygon to meet conventional compression algorithm requirement ordinary rectangular, namely determine external polygonal minimum boundary rectangle.
View data in the external polygon that extracts is carried out video compression with the shape of described external polygonal minimum boundary rectangle, wherein, fill corresponding view data in external polygon, fill with " 0 " in the zone outside external polygon.
By above-mentioned compression method, can adopt conventional video-frequency compression method to come the view data in the external polygon of non-rectangle is compressed.
Need to prove, except the above-mentioned method that the video data of non-rectangle is compressed, also can adopt other self-defining method that external polygon is carried out video compression.
By above-mentioned steps, the final moving object video that obtains extraction one width of cloth background picture and compression transmits, owing to there is not redundant background image data, has reduced the total amount of data of transmission.
Step S40: carry out transmission of video according to described positional information, background picture and described moving object video.
In this step, mainly be with through the decomposition data after the above-mentioned processing in channel, and at receiving terminal restructuring video.
In one embodiment, the transmission course of step S40 is as follows:
Step S401 is sent to receiving terminal with described background picture, positional information and described moving object video.
Particularly, at transmitting terminal, the moving object video of background picture, positional information and the compression of every section transmission of video is sent to receiving terminal successively.
Step S402, at receiving terminal according to described positional information with described background picture and moving object video synthetic video.
Particularly, at receiving terminal, with the moving object video compression framing picture of every section transmission of video receiving, then according to positional information these frame pictures and background picture are synthesized, obtain new frame picture, these frame pictures are compressed into video data again, finish the transmission of video process.
As an embodiment, can be as follows with the process of moving object video compression framing picture:
Adopt the decoding algorithm relative with compression algorithm that the moving object video is carried out decompress(ion), decompress(ion) obtains the frame picture of external polygonal minimum boundary rectangle shape, according to external polygonal positional information, namely utilize the determined shape in each summit of external polygon, external polygonal minimum boundary rectangle is carried out cutting, keep the data in the external polygon, abandon external polygon " 0 " data in addition, obtain the frame picture of moving object.
Above-mentioned is the process that the video data of non-rectangle is decoded, corresponding with the compression process among the step S304, need to prove, except aforesaid way, also can adopt according to concrete compression method other self-defining method that the moving object video is decoded.
In above-mentioned transmission course, if the transmission of multistage video arranges synthetic relevant information when sending, when receiving, can realize that easily moving object picture and background picture dispose automatically according to this relevant information.
Be described in detail below in conjunction with the embodiment of accompanying drawing to Video transmission system of the present invention.
Fig. 4 shows the Video transmission system structural representation of an embodiment, mainly comprises: frame picture acquisition module, displacement range computing module, video data extraction module and video data transmitting module.
Described frame picture acquisition module is for the frame picture that obtains transmission of video according to original video.
In one embodiment, described frame picture acquisition module is further used for: the original video that will need to transmit is decoded into continuous frame picture, and described continuous frame picture is split into the some sections frame pictures that transmission of video is corresponding.
The displacement range computing module is for external polygon and the positional information thereof of calculating described frame picture displacement of moving article.
In one embodiment, described displacement range computing module comprises: rectangle computing unit, rectangle superpositing unit and positional information calculation unit.
Described rectangle computing unit is used for identifying the moving object of described frame picture, and calculates the external minimum rectangle of described moving object in each frame frame picture;
Described rectangle superpositing unit is used for external minimum rectangle with each frame frame picture and superposes and obtain the external polygon of displacement of moving article;
Described positional information calculation unit is used for calculating described external polygon with respect to the positional information of background picture.
The video data extraction module is used for extracting the outer background picture of described external polygon and the moving object video of each the frame frame picture in the described external polygon according to described positional information.
In one embodiment, described video data extraction module comprises: background acquiring unit, background superpositing unit, moving object picture extraction unit and moving object video compression unit.
Described background acquiring unit is used for obtaining background content except described external polygon according to described positional information from the described frame picture of some frames;
Described background superpositing unit obtains the background picture of described transmission of video for the described background content of obtaining is superposeed;
Described moving object picture extraction unit is used for extracting moving object frame picture in the described external polygon according to described positional information from the described frame picture of every frame;
Described moving object video compression unit is used for the picture compression of described moving object frame is become the moving object video.
The video data transmitting module is used for carrying out transmission of video according to described positional information, background picture and described moving object video.
In one embodiment, described video data transmitting module comprises: transmitting element and receiving element.
Described transmitting element is used for described background picture, positional information and described moving object video are sent to receiving terminal.
Described receiving element is used at receiving terminal according to described positional information described background picture and moving object video synthetic video.
Video transmission system of the present invention is corresponding one by one with video transmission method of the present invention, and technical characterictic and the beneficial effect thereof of setting forth at the embodiment of above-mentioned video transmission method all are applicable to not repeat them here among the embodiment of Video transmission system.
The above embodiment has only expressed several execution mode of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to claim of the present invention.Should be pointed out that for the person of ordinary skill of the art without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection range of patent of the present invention should be as the criterion with claims.
Claims (10)
1. a video transmission method is characterized in that, comprises the steps:
Obtain the frame picture of transmission of video according to original video;
Calculate external polygon and the positional information thereof of displacement of moving article in the described frame picture;
Extract the outer background picture of described external polygon and the moving object video of each the frame frame picture in the described external polygon according to described positional information;
Carry out transmission of video according to described positional information, background picture and described moving object video.
2. video transmission method according to claim 1 is characterized in that, the described step of obtaining the frame picture of transmission of video according to original video comprises:
The original video of needs transmission is decoded into continuous frame picture, described continuous frame picture is split into the some sections frame pictures that transmission of video is corresponding.
3. video transmission method according to claim 1 is characterized in that, the external polygon of displacement of moving article and the step of location parameter thereof comprise in the described frame picture of described calculating:
Identify the moving object of described frame picture, and calculate the external minimum rectangle of described moving object in each frame frame picture;
External minimum rectangle in each frame frame picture superposeed obtain the external polygon of displacement of moving article;
Calculate described external polygon with respect to the positional information of background picture.
4. video transmission method according to claim 1 is characterized in that, the described step of extracting the moving object video of the outer background picture of described external polygon and each the frame frame picture in the described external polygon according to described positional information comprises:
From the described frame picture of some frames, obtain background content except described external polygon according to described positional information;
The described background content of obtaining superposeed obtain the background picture of described transmission of video;
From the described frame picture of every frame, extract moving object frame picture in the described external polygon according to described positional information;
The picture compression of described moving object frame is become the moving object video.
5. video transmission method according to claim 1 is characterized in that, described step of carrying out transmission of video according to described positional information, background picture and described moving object video comprises:
Described background picture, positional information and described moving object video are sent to receiving terminal;
At receiving terminal according to described positional information with described background picture and moving object video synthetic video.
6. a Video transmission system is characterized in that, comprising:
Frame picture acquisition module is for the frame picture that obtains transmission of video according to original video;
The displacement range computing module is for external polygon and the positional information thereof of calculating described frame picture displacement of moving article;
The video data extraction module is used for extracting the outer background picture of described external polygon and the moving object video of each the frame frame picture in the described external polygon according to described positional information;
The video data transmitting module is used for carrying out transmission of video according to described positional information, background picture and described moving object video.
7. Video transmission system according to claim 6 is characterized in that, described frame picture acquisition module is further used for:
The original video of needs transmission is decoded into continuous frame picture, described continuous frame picture is split into the some sections frame pictures that transmission of video is corresponding.
8. Video transmission system according to claim 6 is characterized in that, described displacement range computing module comprises:
The rectangle computing unit is used for identifying the moving object of described frame picture, and calculates the external minimum rectangle of described moving object in each frame frame picture;
The rectangle superpositing unit is used for external minimum rectangle with each frame frame picture and superposes and obtain the external polygon of displacement of moving article;
The positional information calculation unit is used for calculating described external polygon with respect to the positional information of background picture.
9. Video transmission system according to claim 6 is characterized in that, described video data extraction module comprises:
The background acquiring unit is used for obtaining background content except described external polygon according to described positional information from the described frame picture of some frames;
The background superpositing unit obtains the background picture of described transmission of video for the described background content of obtaining is superposeed;
Moving object picture extraction unit is used for extracting moving object frame picture in the described external polygon according to described positional information from the described frame picture of every frame;
Moving object video compression unit is used for the picture compression of described moving object frame is become the moving object video.
10. Video transmission system according to claim 6 is characterized in that, described video data transmitting module comprises:
Transmitting element is used for described background picture, positional information and described moving object video are sent to receiving terminal;
Receiving element is used at receiving terminal according to described positional information described background picture and moving object video synthetic video.
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| CN201210545532.4A CN103037206B (en) | 2012-12-14 | 2012-12-14 | Video transmission method and system |
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| CN103475877A (en) * | 2013-09-05 | 2013-12-25 | 广东威创视讯科技股份有限公司 | Video transmission method and system |
| CN106803959A (en) * | 2017-02-28 | 2017-06-06 | 腾讯科技（深圳）有限公司 | Encoding video pictures, coding/decoding method and device |
| CN111131852A (en) * | 2019-12-31 | 2020-05-08 | 歌尔科技有限公司 | Video live broadcast method, system and computer readable storage medium |
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| CN111405142A (en) * | 2020-03-30 | 2020-07-10 | 咪咕视讯科技有限公司 | Image processing method, device and computer readable storage medium |
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