CN101193261B - Video communication system and method - Google Patents
Video communication system and method Download PDFInfo
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- CN101193261B CN101193261B CN2007100737198A CN200710073719A CN101193261B CN 101193261 B CN101193261 B CN 101193261B CN 2007100737198 A CN2007100737198 A CN 2007100737198A CN 200710073719 A CN200710073719 A CN 200710073719A CN 101193261 B CN101193261 B CN 101193261B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/14—Systems for two-way working
- H04N7/141—Systems for two-way working between two video terminals, e.g. videophone
- H04N7/142—Constructional details of the terminal equipment, e.g. arrangements of the camera and the display
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/14—Systems for two-way working
- H04N7/141—Systems for two-way working between two video terminals, e.g. videophone
- H04N7/142—Constructional details of the terminal equipment, e.g. arrangements of the camera and the display
- H04N2007/145—Handheld terminals
Abstract
The invention discloses a video communication system, which is used for transmitting video from a transmission terminal to a receiving terminal for playing, the transmission terminal consists of a video collection unit used for collecting serial numbers of video, an image analysis unit used for dividing video images in the serial numbers of video into a first part and a second part, an image coding unit used for using the first quality parameter as the code of the first part of the video image and using the second quality parameter as the code of the second part of the video image, and a data transmission unit used for transmitting data of video image code data coded and finished by the image coding unit to the receiving terminal. The invention also provides a corresponding method. By adopting different quality parameters in different areas of the video image for coding, the video communication system and the method of the invention satisfies the individual requirements in the process of video communication, such as privacy protection during the process of video communication.
Description
Technical field
The present invention relates to the computer graphics techniques field, more particularly, relate to a kind of video communication system and method.
Background technology
Along with video coding technique and development of digital image, can carry out some automatic or automanual subarea processing at present to video sequence, satisfy the different demands of different application.
Above-mentioned digital image processing techniques comprise technology such as image segmentation, iamge description and identification.Image segmentation is that significant characteristic in the image is extracted, and wherein significant feature comprises edge in the image, zone etc., and this is the basis of further carrying out image recognition, analysis and understanding.Iamge description is the prerequisite of image recognition and understanding.Can adopt its geometrical property to describe the characteristic of object as the simplest bianry image, the describing method of general pattern adopts two-dimensional shapes to describe, and it has the border to describe and region description two class methods.Image classification (identification) belongs to the category of pattern recognition, after its some preliminary treatment of image process to the effect that (strengthen, restore, compress), carry out image segmentation and feature extraction, perhaps mate identification, thereby adjudicate classification via the feature of some priori.
(for example JICQ (Instant Messenger, IM) video communication in) all adopts traditional Video Encoding Mode in existing most video communication.When using existing video communication system to carry out video communication, generally include following process: by camera picked-up video image; Video image to picked-up is encoded to video data; Video data behind the coding is sent to receiving terminal; The receiving terminal decoding is also play the coded data that receives.
Yet, in the above-mentioned video communication, single frame (single image) in the video sequence even whole video sequence are adopted identical mass parameter, present with same definition, there is not different disposal at zones of different.Work as the user like this and be reluctant to give the other side own residing environmental exposure, when wanting to use video capability again simultaneously, suitable without comparison solution.
Summary of the invention
The technical problem to be solved in the present invention is, at above-mentioned video communication system owing to the whole video image is adopted the equal in quality parameter cause can't the hidden parts zone problem, a kind of video communication system and method are provided.
The technical scheme that the present invention solves the problems of the technologies described above is, a kind of video communication system is provided, and is used for video is play to receiving terminal from sending terminal transmission, and described transmission terminal comprises:
Video acquisition unit is used to gather video sequence;
Image analyzing unit, be used for the video image of described video sequence is divided into first and second portion, wherein said first is the prospect part, described second portion is a background parts, preceding 3-5 the picture frame of this image analyzing unit contrast current image frame in video sequence obtains rest point and transfer point, and the rest point that surrounds with a plurality of transfer points and by described a plurality of transfer points is as the prospect part, other parts are background parts, described rest point is the unchanged position of pixel in the picture frame of front and back, and described transfer point is the different position of pixel in the picture frame of front and back;
The image encoding unit is used for using first mass parameter as first's coding of video image and use the second portion coding of second mass parameter as video image;
Data transmission unit, the video image coding code data that is used for the image encoding cell encoding is finished sends to receiving terminal.
In a kind of video communication system of the present invention, described image analyzing unit further comprises:
Image identification unit is used for analyzing and determines the prospect part and the background parts of the video sequence video image that described video acquisition unit is gathered, and the first and the second portion of described video image sent to the image encoding cell encoding.
In a kind of video communication system of the present invention, also comprise parameter set unit, be used to be provided with described first mass parameter and second mass parameter.
In a kind of video communication system of the present invention, described receiving terminal comprises: the border balanced unit is used for when output video image first and the second portion to video image and does transition processing.
The present invention also provides a kind of video communication method, is used for video is play to receiving terminal from sending terminal transmission, may further comprise the steps:
(a) send terminal and gather video sequence;
(b) video image in the described video sequence is divided into first and second portion;
(c) use first mass parameter as the first in video image coding and use second mass parameter to encode as the second portion in the video image;
(d) the video image coding code data that the image encoding cell encoding is finished sends to receiving terminal decoding broadcast;
Described step (b) comprising:
(b1) obtain rest point and transfer point by preceding 3-5 the picture frame of contrast current image frame in video sequence, and the rest point that surrounds with a plurality of transfer points and by described a plurality of transfer points is as the prospect part, other parts are background parts, described rest point is the unchanged position of pixel in the picture frame of front and back, and described transfer point is the different position of pixel in the picture frame of front and back;
(b2) prospect of video image partly is divided into first and the background parts of video image is divided into second portion.
In a kind of video communication method of the present invention, described step (c) further comprises before: first mass parameter and second mass parameter are set.
In a kind of video communication method of the present invention, described step (d) further comprises afterwards: first and second portion to video image when output video image are done transition processing.
Video communication system of the present invention and method adopt different mass parameters to encode by the zones of different to video image, have satisfied the individual demand in the video communication process, the secret protection in for example video communication process.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples, in the accompanying drawing:
Fig. 1 is the structural representation of a kind of video communication system embodiment of the present invention;
Fig. 2 is the structural representation of image analyzing unit first embodiment among Fig. 1;
Fig. 3 is the structural representation of image analyzing unit second embodiment among Fig. 1;
Fig. 4 is the flow chart of a kind of video communication method embodiment of the present invention.
Embodiment
One embodiment of the present of invention are at the characteristics of existing video communication, with camera collection to video sequence discern and cut apart, and different piece is carried out the different quality coding, thereby has satisfied video communication user's individual demand.
As shown in Figure 1, in an embodiment of a kind of video communication system of the present invention, include and send terminal 11 and receiving terminal 12.Send terminal 11 and be used for gathering video sequence by the first-class device of making a video recording, and will send behind the video sequence coding, receiving terminal 12 then passes through network 13 from transmission terminal 11 receiver, video sequences, and decoding displaying video sequence.Certainly, above-mentioned video transmission can be two-way.
Sending terminal 11 comprises: video acquisition unit 111, image analyzing unit 112, image encoding unit 113 and data transmission unit 114.
As shown in Figure 2, in the first embodiment of the present invention, image analyzing unit 112 includes image identification unit 211, is used for the prospect part and the background parts of identification video image, and wherein prospect partly is first, and background parts then is a second portion.
When specific implementation, image identification unit 211 can be by picture frame (being generally bitmap) before and after in the contrast video sequence, thereby pixel variations in the picture frame before and after analyzing is obtained prospect part and background parts in the video image.Preceding 3-5 the picture frame of image analyzing unit 112 contrast current image frame in video sequence, if the pixel of same position is unchanged in the picture frame of front and back, then this position is a rest point; If the pixel difference of same position in the frame of front and back, then this position is a transfer point; The rest point that image analyzing unit 112 surrounds with a plurality of transfer points and by above-mentioned a plurality of transfer points is as the prospect part, and other parts are background parts.
Certainly, image analyzing unit 112 also can use any existing prospect and background RM to obtain prospect part and background parts in the video image.
As shown in Figure 3, in the second embodiment of the present invention, image analyzing unit 112 includes image selected cell 311.This image selected cell 311 is used for choosing a zone from video image, for example selects rectangle, circle or erose zone by the mouse frame.And the zone that will choose is as first, and selected areas is not as second portion.
When the first mass parameter value equals the second mass parameter value, the definition unanimity of the video sequence that decoding is play; When the first mass parameter value was lower than the second mass parameter value, in the video sequence that decoding is play, the definition of first was higher than the definition of second portion; When the first mass parameter value was higher than the second mass parameter value, in the video sequence that decoding is play, the definition of first was lower than the definition of second portion.
In enforcement as shown in Figure 2, first mass parameter is lower than second mass parameter.At this moment, in the video sequence that receiving terminal 12 is play, the definition relatively poor (similar mosaic effect) of background parts (i.e. the second mass parameter value counterpart), thus can hide partial content in the video sequence.Surrounding environment when for example hiding Video chat.
In enforcement as shown in Figure 3, the first mass parameter value is higher than the second mass parameter value.At this moment, in the video sequence that receiving terminal 12 is play, the definition relatively poor (similar mosaic effect) of selected areas (i.e. the first mass parameter value counterpart).
In addition, in said system, can comprise that also a parameter is provided with module, is used to be provided with the value of first mass parameter and second mass parameter.
In order to improve the visual effect that video sequence decoding is play, receiving terminal 12 can comprise a border balanced unit (not shown), is used for when output video image prospect part and the background parts to video image and does transition processing.Thereby when decoding displaying video sequence, make the edge smoothing of first and second portion, avoid too obvious by fuzzy zone boundary.
As shown in Figure 4, be the flow chart of a kind of video communication method embodiment of the present invention.This method is used to realize that the video sequence between the terminal transmits, and specifically may further comprise the steps:
Step S41: send terminal 11 and gather video sequence by camera or similar device.
Step S42: the video image in the video sequence of gathering among the step S41 is divided into first and second portion.
In first embodiment of said method, first is the prospect part of video image, and second portion then is the background parts of video image.When specific implementation, can be by picture frame (being generally bitmap) before and after in the contrast video sequence, thus pixel variations in the picture frame before and after analyzing is obtained prospect part and background parts in the video image.Usually can contrast preceding 3-5 the picture frame of current image frame in video sequence, if the pixel of same position is unchanged in the picture frame of front and back, then this position is a rest point; If the pixel difference of same position in the frame of front and back, then this position is a transfer point; The rest point that surrounds with a plurality of transfer points and by above-mentioned a plurality of transfer points is as the prospect part, and other parts are background parts.
Certainly, also can use any existing prospect and background RM to obtain prospect part and background parts in the video image.
In second embodiment of said method, the zone that will choose in video image is as first, and selected areas is not as second portion.
Step S43: use first mass parameter as the first in video image coding and use second mass parameter to encode as the second portion in the video image.Compression factor when above-mentioned first mass parameter and second mass parameter are used to control coding, the mass parameter value is big more, and data volume is more little, and corresponding image quality descends also big more.
Step S44: the video image coding code data that the image encoding cell encoding is finished sends to receiving terminal 12 decoding broadcasts.When the first mass parameter value equals the second mass parameter value, the definition unanimity of the video sequence that decoding is play; When the first mass parameter value was lower than the second mass parameter value, in the video sequence that decoding is play, the definition of first was higher than the definition of second portion; When the first mass parameter value was higher than the second mass parameter value, in the video sequence that decoding is play, the definition of first was lower than the definition of second portion.
In addition, in said method, can comprise also that before step S43 a parameter is provided with step, be used to be provided with the value of first mass parameter and second mass parameter.
In order to improve the visual effect that video sequence decoding is play, in step S44, can comprise a border equalization step, be used for when output video image prospect part and background parts and do transition processing video image.Thereby when decoding displaying video sequence, make the edge smoothing of first and second portion, avoid too obvious by fuzzy zone boundary.
The above; only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.
Claims (7)
1. a video communication system is used for video is play to receiving terminal from sending terminal transmission, it is characterized in that described transmission terminal comprises:
Video acquisition unit is used to gather video sequence;
Image analyzing unit, be used for the video image of described video sequence is divided into first and second portion, wherein said first is the prospect part, described second portion is a background parts, preceding 3-5 the picture frame of this image analyzing unit contrast current image frame in video sequence obtains rest point and transfer point, and the rest point that surrounds with a plurality of transfer points and by described a plurality of transfer points is as the prospect part, other parts are background parts, described rest point is the unchanged position of pixel in the picture frame of front and back, and described transfer point is the different position of pixel in the picture frame of front and back;
The image encoding unit is used for using first mass parameter as first's coding of video image and use the second portion coding of second mass parameter as video image;
Data transmission unit, the video image coding code data that is used for the image encoding cell encoding is finished sends to receiving terminal.
2. a kind of video communication system according to claim 1 is characterized in that, described image analyzing unit further comprises:
Image identification unit is used for analyzing and determines the prospect part and the background parts of the video sequence video image that described video acquisition unit is gathered, and the first and the second portion of described video image sent to the image encoding cell encoding.
3. according to a kind of video communication system described in each among the claim 1-2, it is characterized in that, also comprise parameter set unit, be used to be provided with described first mass parameter and second mass parameter.
4. according to each described a kind of video communication system among the claim 1-2, it is characterized in that described receiving terminal comprises: the border balanced unit is used for when output video image first and the second portion to video image and does transition processing.
5. a video communication method is used for video is play to receiving terminal from sending terminal transmission, it is characterized in that, may further comprise the steps:
(a) send terminal and gather video sequence;
(b) video image in the described video sequence is divided into first and second portion;
(c) use first mass parameter as the first in video image coding and use second mass parameter to encode as the second portion in the video image;
(d) the video image coding code data that the image encoding cell encoding is finished sends to receiving terminal decoding broadcast;
Described step (b) comprising:
(b1) obtain rest point and transfer point by preceding 3-5 the picture frame of contrast current image frame in video sequence, and the rest point that surrounds with a plurality of transfer points and by described a plurality of transfer points is as the prospect part, other parts are background parts, described rest point is the unchanged position of pixel in the picture frame of front and back, and described transfer point is the different position of pixel in the picture frame of front and back;
(b2) prospect of video image partly is divided into first and the background parts of video image is divided into second portion.
6. a kind of video communication method according to claim 5 is characterized in that, described step (c) further comprises before: first mass parameter and second mass parameter are set.
7. a kind of video communication method according to claim 5 is characterized in that, described step (d) further comprises afterwards: first and second portion to video image when output video image are done transition processing.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2007100737198A CN101193261B (en) | 2007-03-28 | 2007-03-28 | Video communication system and method |
| PCT/CN2008/070237 WO2008116400A1 (en) | 2007-03-28 | 2008-02-01 | A terminal, method and system for realizing video communication |
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| CN2007100737198A CN101193261B (en) | 2007-03-28 | 2007-03-28 | Video communication system and method |
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| CN101193261B true CN101193261B (en) | 2010-07-21 |
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| CN101998104B (en) * | 2009-08-31 | 2013-05-29 | 中国移动通信集团公司 | Generating method for video telephone and substitute video thereof |
| CN101668157B (en) * | 2009-09-24 | 2011-09-21 | 中兴通讯股份有限公司 | Method used for privacy protection in video call, application server and system |
| JP5375490B2 (en) * | 2009-09-29 | 2013-12-25 | ソニー株式会社 | Transmitting apparatus, receiving apparatus, communication system, and program |
| CN102630043B (en) * | 2012-04-01 | 2014-11-12 | 北京捷成世纪科技股份有限公司 | Object-based video transcoding method and device |
| CN103428483B (en) * | 2012-05-16 | 2017-10-17 | 华为技术有限公司 | A kind of media data processing method and equipment |
| CN105100671A (en) * | 2014-05-20 | 2015-11-25 | 西安中兴新软件有限责任公司 | Image processing method and device based on video call |
| CN107295360B (en) * | 2016-04-13 | 2020-08-18 | 成都鼎桥通信技术有限公司 | Video transmission method and device |
| CN105872448A (en) * | 2016-05-31 | 2016-08-17 | 宇龙计算机通信科技(深圳)有限公司 | Display method and device of video images in video calls |
| CN106550243A (en) * | 2016-12-09 | 2017-03-29 | 武汉斗鱼网络科技有限公司 | Live video processing method, device and electronic equipment |
| CN106851171A (en) * | 2017-02-21 | 2017-06-13 | 福建江夏学院 | Intimacy protection system and method are realized in video calling |
| CN107054937A (en) * | 2017-03-23 | 2017-08-18 | 广东数相智能科技有限公司 | A kind of refuse classification suggestion device and system based on image recognition |
| CN107493440A (en) * | 2017-09-14 | 2017-12-19 | 光锐恒宇（北京）科技有限公司 | A kind of method and apparatus of display image in the application |
| CN109862365B (en) * | 2019-01-30 | 2022-01-11 | 西安万像电子科技有限公司 | Image data processing method and device |
| CN111416939A (en) * | 2020-03-30 | 2020-07-14 | 咪咕视讯科技有限公司 | Video processing method, video processing equipment and computer readable storage medium |
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