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Method and device for labelling characteristic information of video code stream and method and device for detecting characteristic information of video code stream

A feature information and video technology, applied in the field of video communication, can solve the problems of weak robustness and large amount of calculation, and achieve the effect of strong anti-interference, small amount of calculation, and good robustness

Active Publication Date: 2013-08-07
ZTE CORP
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Problems solved by technology

This kind of method involves point-by-point operation, the amount of calculation is large, and the assumptions such as smoothness as the theoretical basis may not be true in practice. At the same time, the application of these methods needs to set the discrimination threshold according to the experiment. Correlation, less robust

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  • Method and device for labelling characteristic information of video code stream and method and device for detecting characteristic information of video code stream
  • Method and device for labelling characteristic information of video code stream and method and device for detecting characteristic information of video code stream

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Embodiment Construction

[0041] The specific implementation manners of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0042] The specific embodiment of the present invention includes the processing of the sending end and the receiving end of the video code stream transmission. Generally, at the sending end, the video code stream needs to be encoded, so in the following, the sending end is also called the encoder end; correspondingly, At the receiving end, the video code stream needs to be decoded, so in the following, the receiving end is also referred to as the decoder end.

[0043] On the encoder side, it is mainly to mark the feature information of the video code stream, and its main process is to perform the following processing steps for each macroblock of the video code stream:

[0044] 1. According to the predetermined characteristics of the macroblock, generate its corresponding characteristic information;

[0045] 2. Respectively sear...

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Abstract

The invention discloses a method and a device for labelling characteristic information of a video code stream and a method and a device for detecting the characteristic information of the video code stream. For each macroblock of the video code stream, the method for labelling the characteristic information comprises the following steps of: according to the predetermined characteristic of the macroblock, generating the corresponding characteristic information; searching and recording a specific coefficient of each sub-block of the macroblock; and according to a predetermined rule and the characteristic information, performing characteristic information labelling on the specific coefficient of each sub-block. For each macroblock of the video code stream, the method for detecting the characteristic information comprises the following steps of: acquiring first characteristic information of the macroblock; searching and recording a specific coefficient of each sub-block of the macroblock;according to a predetermined rule, performing second characteristic information extraction processing on the specific coefficient of each sub-block; and detecting whether the first characteristic information is the same as the second characteristic information. The invention has good detection rate and does not add extra cost in the video code stream detection.

Description

technical field [0001] The present invention relates to the field of video communication, in particular to a method and device for feature information marking and detection of video code streams. Background technique [0002] With the development of wired broadband network and wireless network and the drive of user needs, multimedia technology and related applications have received more and more attention, and are considered to be one of the mainstream applications of high-speed networks in the future. Compared with traditional Internet applications such as WWW and E-mail, multimedia applications, especially video applications, have stricter requirements on real-time performance and greater demands on bandwidth. Since most video applications use high-compression coding technology, the requirements for transmission errors are particularly stringent, but wired or wireless networks do not provide QOS (Quality of Services) guarantees for transmission. In the video compression c...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N7/26H04N19/154
Inventor 黄晓红左雯王宁梁立伟范文杰
Owner ZTE CORP
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