CN103037206B - Video transmission method and system - Google Patents
Video transmission method and system Download PDFInfo
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- CN103037206B CN103037206B CN201210545532.4A CN201210545532A CN103037206B CN 103037206 B CN103037206 B CN 103037206B CN 201210545532 A CN201210545532 A CN 201210545532A CN 103037206 B CN103037206 B CN 103037206B
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Abstract
A kind of video transmission method and system, the method comprising the steps of: the frame picture that obtains transmission of video according to original video; Calculate external polygon and the positional information thereof of displacement of moving article in described frame picture; Extract the moving object video of the background picture outside described external polygon and the each frame frame picture in 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. Technology of the present invention, the video data of the Minimum Area of the displacement of moving article of transmission of video is transmitted, and the image except this Minimum Area only needs transmission primaries, has reduced the data volume of transmission background parts redundancy, effectively reduce transmission data, improved speed and the efficiency of transmission of video.
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
Between video image consecutive frame, there is a large amount of redundancies, in technical field of video processing, althoughH.264 standard has proposed a lot of advanced persons' video-frequency compression method to video, has removed superfluous that frame is interior, interframe is a large amount ofRemaining information, but these compression methods are taking high computation complexity as cost, and high algorithm complex has reduced and looksFrequently compression, decoding efficiency, limited effect and the quality of the real-time Transmission of video.
In the patent documentation that is CN102724492A at publication number, a kind of frame from original video stream is disclosedIn image, extract respectively background image and moving image; By moving image and corresponding co-ordinate position information thereofSend with the background image extracting and corresponding frame position information thereof; Receiving moving pictures and correspondence thereofCo-ordinate position information and background image and corresponding frame position information thereof; According to frame position information and coordinate positionInformation is play moving image and the background image of described reception.
But in actual applications, video image moves and has large-scale situation of movement, if the model of region of variationEnclose when larger, adopt this technology can cause video data treating capacity and information capacity excessive, look thereby reduceFrequently the efficiency of transmission of image information.
Summary of the invention
Based on this, being necessary provides the video transmission method that a kind of efficiency of transmission is higher and is for the problems referred to aboveSystem.
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 described frame picture;
Extract in the background picture and described external polygon outside described external polygon according to described positional informationThe moving object video of each frame frame picture;
Carry out transmission of video according to described positional information, background picture and described moving object video.
A kind of Video transmission system, comprising:
Frame picture acquisition module, for obtaining the frame picture of transmission of video according to original video;
Displacement range computing module, for calculate described frame picture displacement of moving article external polygon andIts positional information;
Video data extraction module, for extracting the background outside described external polygon according to described positional informationThe moving object video of the each frame frame picture in picture and described external polygon;
Video data transmitting module, for stereoscopic according to described positional information, background picture and described moving objectFrequently carry out transmission of video.
Above-mentioned video transmission method and system, by the video of the Minimum Area of the displacement of moving article of transmission of videoData are transmitted, and the image except this Minimum Area only needs transmission primaries, have reduced transmission background partsThe data volume of redundancy, effectively reduces transmission data, has improved speed and the efficiency of transmission of video.
Brief description of the 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 in embodiment;
Fig. 3 is the external polygonal schematic diagram of a displacement of moving article in embodiment;
Fig. 4 is the Video transmission system structural representation of an embodiment.
Detailed description of the invention
Below in conjunction with accompanying drawing, the detailed description of the invention of video transmission method of the present invention is described in detail.
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, be mainly by original video (is comprised to the real-time video of various forms or this locality depositThe video of storage) processing of decoding, obtain the video data transmitting at transmitting terminal.
In one embodiment, for the constant original video of background parts, utilize corresponding decoding algorithm pairIt is decoded, and obtains the continuous frame picture of some transmission of video. For example, transmit a video conferenceVideo data, due in this video conference, background parts is constant, whole original video is as oneTransmission of video is processed.
In another embodiment, the original video changing for background parts, what first needs are transmitted is formerBeginning video decode becomes continuous frame picture, then these continuous frame pictures is carried out to segmentation, splits into someFrame picture corresponding to section transmission of video.
Particularly, the situation of change of the background parts of the original video of transmission as required, with background parts notThe one section of video becoming is as least unit, by the change of the image background part of continuous frame picture before and after judgementChange, the continuous frame picture that decoding is obtained is split as the some sections of transmission of video that background parts is identical, thenRecycling relative decoding method is decoded, and the frame picture of every section of 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 judge 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 described frame picture.
In this step, be mainly calculate in whole section of transmission of video, displacement of moving article in each frame frame pictureScope, and calculate its position parameter data with respect to 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 described moving object at each frame frame figureExternal minimum rectangle in sheet.
Particularly, adopt relevant mathematical algorithm to identify frame by frame the moving object of frame picture, and calculate moving objectThe external minimum rectangle of body in each frame frame picture, preferred, can adopt camshift algorithm or optical flow methodIdentify the moving object of frame picture, by the identification to moving object, determine its external in frame pictureMinimum rectangle is the scope of this moving object.
As shown in Figure 2, Fig. 2 is one section of transmission of video being made up of three frame frame pictures, identifies in Fig. 2 aMoving object a1, a2, the moving object b1 in Fig. 2 b, the moving object c1 in Fig. 2 c, dotted line frame is itExternal minimum rectangle.
Step S202, superposes external minimum rectangle in each frame frame picture to obtain displacement of moving articleExternal polygon.
Concrete, the external minimum rectangle of moving object all on the frame picture of whole section of transmission of video is carried outSuperpose, from the picture stack, can obtain the external polygon of all displacement of moving articles, for transmission is lookedThe displacement range of moving object frequently.
As shown in Figure 3, in the picture after stack, moving object a1, a2, b1, the external minimum rectangle of c1The external polygon of the displacement of moving article of (dotted line) composition, this polygon is by several point and connecting line thereof(adding heavy line) forms.
Step S203, calculates the positional information of described external polygon with respect to background picture.
Concrete, the coordinate of the point of the each drift angle of calculating polygon, determines that these coordinates are with respect in frame pictureCoordinate parameters, determine that external polygon is with respect to the position parameter data of background picture.
Step S30: according to the background picture outside the described external polygon of described positional information extraction and described externalThe moving object video of the each frame frame picture in polygon.
In this step, be mainly from every section of transmission of video, to extract a width background picture number according to positional informationAccording to, and from every frame frame picture, extract in external polygon moving object video data.
In one embodiment, the leaching process of step S30 is as follows:
Step S301, obtains from frame picture described in some frames according to described positional information except described external polygonBackground content outside shape.
Particularly, according to described positional information, from some frame frame pictures, intercept outside described external polygonBackground content obtains the background content of multiframe frame picture.
Step S302, superposes the described background content of obtaining to obtain the background picture of described transmission of video.
Particularly, above-mentioned background content is superposeed, obtain a width and merge picture, this fusion picture isThe background picture of transmission of video.
It should be noted that, except aforesaid way, can also adopt other image processing method to obtain transmissionThe background picture of video.
Step S303, extracts in described external polygon from frame picture described in every frame according to described positional informationMoving object frame picture.
Step S304, becomes moving object video by the picture compression of described moving object frame.
As an embodiment, each frame picture compression in described external polygon is become to moving object videoProcess can be as follows:
External polygon is converted to and meets the ordinary rectangular that conventional compression algorithm requires, determine external polygonThe minimum boundary rectangle of shape.
Shape by the view data in the external polygon extracting with described external polygonal minimum boundary rectangleShape carries out video compress, wherein, fills corresponding view data, at external polygon in external polygonFill with " 0 " in outer region.
By above-mentioned compression method, can adopt conventional video-frequency compression method to carry out external polygon to non-rectangleView data in shape is compressed.
It should be noted that, except the above-mentioned method that the video data of non-rectangle is compressed, also canAdopt other self-defining method to carry out video compress to external polygon.
By above-mentioned steps, the final moving object video that obtains extraction one width background picture and compression passesDefeated, owing to there is no the background image data of redundancy, reduce 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, be mainly by above-mentioned process decomposition data after treatment in channel, andReceiving terminal restructuring video.
In one embodiment, the transmitting procedure of step S40 is as follows:
Step S401, is sent to receiving terminal by described background picture, positional information and described moving object video.
Particularly, at transmitting terminal, by the motion of the background picture of every section of transmission of video, positional information and compressionObject video is sent to receiving terminal successively.
Step S402, closes described background picture and moving object video according to described positional information at receiving terminalBecome video.
Particularly, at receiving terminal, by the moving object video compression framing figure of the every section of transmission of video receivingSheet, then synthesizes these frame pictures and background picture according to positional information, obtains new frame picture,These frame pictures are compressed into video data again, complete transmission of video process.
As an embodiment, can be as follows by the process of moving object video compression framing picture:
Adopt the decoding algorithm relative with compression algorithm that moving object video is carried out to decompress(ion), decompress(ion) obtains externalThe frame picture of polygonal minimum boundary rectangle shape, according to external polygonal positional information, outside utilizingConnect the determined shape in each summit of polygon, external polygonal minimum boundary rectangle is carried out to cutting, protectStay the data in external polygon, abandon external polygon " 0 " data in addition, obtain the frame of moving objectPicture.
Above-mentioned is the process that the video data of non-rectangle is decoded, with the compression process phase in step S304Correspondence, it should be noted that, except aforesaid way, also can adopt other according to concrete compression methodSelf-defining method is decoded to moving object video.
In above-mentioned transmitting procedure, if the transmission of multistage video arranges synthetic relevant letter in the time sendingBreath can be realized easily moving object picture and background picture is joined automatically according to this relevant information in the time receivingPut.
Below in conjunction with accompanying drawing, the detailed description of the invention of Video transmission system of the present invention is described in detail.
Fig. 4 shows the Video transmission system structural representation of an embodiment, mainly comprises: frame picture obtainsDelivery piece, displacement range computing module, video data extraction module and video data transmitting module.
Described frame picture acquisition module, for obtaining the frame picture of transmission of video according to original video.
In one embodiment, described frame picture acquisition module is further used for: by original the looking of needs transmissionFrequently be decoded into continuous frame picture, described continuous frame picture is split into the some sections of frames that transmission of video is correspondingPicture.
Displacement range computing module, for calculate described frame picture displacement of moving article external polygon andIts positional information.
In one embodiment, described displacement range computing module comprises: rectangle computing unit, rectangle stackUnit and positional information calculation unit.
Described rectangle computing unit, for identifying the moving object of described frame picture, and calculates described moving objectThe external minimum rectangle of body in each frame frame picture;
Described rectangle superpositing unit, obtains fortune for the external minimum rectangle of each frame frame picture is superposeedThe external polygon of animal body displacement;
Described positional information calculation unit, for calculating the position of described external polygon with respect to background pictureInformation.
Video data extraction module, for extracting the background outside described external polygon according to described positional informationThe moving object video of the each frame frame picture in picture and described external polygon.
In one embodiment, described video data extraction module comprises: background acquiring unit, background stackUnit, moving object picture extraction unit and moving object video compress unit.
Described background acquiring unit, for obtaining and remove from frame picture described in some frames according to described positional informationBackground content outside described external polygon;
Described background superpositing unit, obtains described transmission for the described background content of obtaining is superposeed and looksBackground picture frequently;
Described moving object picture extraction unit, for according to described positional information from frame picture described in every frameExtract the moving object frame picture in described external polygon;
Described moving object video compress unit, for becoming moving object by the picture compression of described moving object frameVideo.
Video data transmitting module, for stereoscopic according to described positional information, background picture and described moving objectFrequently carry out transmission of video.
In one embodiment, described video data transmitting module comprises: transmitting element and receiving element.
Described transmitting element, for sending described background picture, positional information and described moving object videoTo receiving terminal.
Described receiving element, at receiving terminal according to described positional information by described background picture and moving objectStereoscopic frequency synthetic video.
Video transmission system of the present invention is corresponding one by one with video transmission method of the present invention, passes at above-mentioned videoThe technical characterictic that the embodiment of transmission method sets forth and beneficial effect thereof are all applicable to the embodiment of Video transmission systemIn, do not repeat them here.
The above embodiment has only expressed several embodiment of the present invention, and it describes comparatively concrete and detailed,But can not therefore be interpreted as the restriction to the scope of the claims of the present invention. It should be pointed out that for this areaThose of ordinary skill, without departing from the inventive concept of the premise, can also make some distortion andImprove, these all belong to protection scope of the present invention. Therefore, the protection domain of patent of the present invention should be with appendedClaim is as the criterion.
Claims (6)
1. a video transmission method, is characterized in that, comprises the steps:
The frame picture that obtains transmission of video according to original video, specifically comprises: original the looking of transmission as requiredThe situation of change of background parts frequently, using the constant one section of video of background parts as least unit, by sentencingThe variation of the image background part of continuous frame picture before and after disconnected, the continuous frame picture that decoding is obtained splitsFor the some sections of transmission of video that background parts is identical, and then utilize relative decoding method to decode, every sectionThe frame picture of transmission of video comprises identical background picture, and wherein, described original video is that background parts changesOriginal video;
External polygon and the positional information thereof of calculating displacement of moving article in described frame picture, specifically comprise:Identify the moving object of described frame picture, and calculate the external minimum of described moving object in each frame frame pictureRectangle; External minimum rectangle in each frame frame picture is superposeed and obtains the external polygon of displacement of moving articleShape; Calculate the positional information of described external polygon with respect to background picture;
Extract in the background picture and described external polygon outside described external polygon according to described positional informationThe moving object video of each frame frame picture;
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, described according to described positionThe fortune of the each frame frame picture in the background picture described in information extraction outside external polygon and described external polygonThe step of animal body video comprises:
From frame picture described in some frames, obtain the background except described external polygon according to described positional informationContent;
The described background content of obtaining is superposeed and obtains the background picture of described transmission of video;
From frame picture described in every frame, extract the moving object in described external polygon according to described positional informationFrame picture;
The picture compression of described moving object frame is become to moving object video.
3. video transmission method according to claim 1, is characterized in that, described according to described positionThe step that information, background picture and described moving object video carry out transmission of 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 by described background picture and moving object video synthetic video.
4. a Video transmission system, is characterized in that, comprising:
Frame picture acquisition module, for obtain the frame picture of transmission of video according to original video, specifically comprises:The situation of change of the background parts of the original video of transmission as required, with one section of constant video of background partsAs least unit, by the variation of the image background part of continuous frame picture before and after judgement, decoding is obtainedThe continuous frame picture obtaining is split as the some sections of transmission of video that background parts is identical, and then utilizes relevant solutionCode method is decoded, and the frame picture of every section of transmission of video comprises identical background picture, wherein, described formerBeginning video is the original video that background parts changes;
Displacement range computing module, for calculate described frame picture displacement of moving article external polygon andIts positional information, described displacement range computing module comprises: rectangle computing unit, for identifying described frame figureThe moving object of sheet, and calculate the external minimum rectangle of described moving object in each frame frame picture; Rectangle is foldedAdd unit, outside acquisition displacement of moving article that the external minimum rectangle of each frame frame picture is superposeedConnect polygon; Positional information calculation unit, for calculating the position of described external polygon with respect to background picturePut information;
Video data extraction module, for extracting the background outside described external polygon according to described positional informationThe moving object video of the each frame frame picture in picture and described external polygon;
Video data transmitting module, for stereoscopic according to described positional information, background picture and described moving objectFrequently carry out transmission of video.
5. Video transmission system according to claim 4, is characterized in that, described video data extractsModule comprises:
Background acquiring unit, described in obtaining and remove from frame picture described in some frames according to described positional informationBackground content outside external polygon;
Background superpositing unit, obtains described transmission of video for the described background content of obtaining superposeedBackground picture;
Moving object picture extraction unit, for extracting from frame picture described in every frame according to described positional informationMoving object frame picture in described external polygon;
Moving object video compress unit, for becoming moving object video by the picture compression of described moving object frame.
6. Video transmission system according to claim 4, is characterized in that, described video data transmittingModule comprises:
Transmitting element, for being sent to described background picture, positional information and described moving object video to connectReceiving end;
Receiving element, at receiving terminal according to described positional information by stereoscopic to described background picture and moving objectFrequently synthetic video.
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103475877B (en) * | 2013-09-05 | 2016-08-24 | 广东威创视讯科技股份有限公司 | Video transmission method and system |
| CN106803959B (en) * | 2017-02-28 | 2019-12-27 | 腾讯科技（深圳）有限公司 | Video image encoding method, video image decoding method, video image encoding apparatus, video image decoding apparatus, and readable storage medium |
| CN111160068B (en) * | 2018-11-07 | 2024-01-26 | 杭州海康威视数字技术股份有限公司 | Target picture generation method and device and electronic equipment |
| CN111131852B (en) * | 2019-12-31 | 2021-12-07 | 歌尔光学科技有限公司 | Video live broadcast method, system and computer readable storage medium |
| 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 |
| CN114979651B (en) * | 2022-04-30 | 2024-06-07 | 苏州浪潮智能科技有限公司 | Terminal video data transmission method, device, equipment and medium |
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