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Video interframe compression method based on space-time correlation

A time-space correlation and video compression technology, which is applied in the direction of digital video signal modification, pulse modulation TV signal transmission, electrical components, etc., can solve the problems of slow encoding speed, increased calculation amount, and affecting H.264 encoding speed, etc., to achieve improved The effect of encoding speed

Inactive Publication Date: 2006-10-11
BEIJING UNIV OF TECH
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Problems solved by technology

Doing so can certainly get the best encoding method, but the cost is that the amount of calculation increases significantly, and the encoding speed becomes very slow, which is the reason why the encoding speed of H.264 is affected.

Method used

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  • Video interframe compression method based on space-time correlation
  • Video interframe compression method based on space-time correlation
  • Video interframe compression method based on space-time correlation

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Embodiment Construction

[0039] In actual use, first of all, a certain video sequence is read in, and the input video sequence needs to be in YUV format. After the video data is read in from the computer, this method is completed for the luminance component in the sequence, so it needs to be read from Wherein the luminance component is extracted, the encoder will call the algorithm mentioned in the present invention to complete the specific encoding work.

[0040] In the specific implementation, the following procedures are completed in the computer:

[0041] Step 1: Read in the corresponding video sequence according to the encoder configuration file, and configure the encoder according to the parameters in the configuration file.

[0042] Step 2: Extract the luminance component from the original file.

[0043] Step 3: Take out the luminance components of the macroblocks to be coded in order.

[0044] Step 4: Perform spatial vertical and horizontal prediction on the luminance value of the macroblock...

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Abstract

The video interframe compression method based on time-space correlativity comprises: (1) processing the brightness component in initial video data; (2) obtaining the brightness value of a macro block in one frame image; (3) calculating space correlativity of the macro block, obtaining the residual value between the current and the predicted with horizontal and vertical prediction method to be the space correlativity metric; (4) calculating time correlativity of macro block to obtain the difference between the current to the predicted as the time correlativity metric; (5) comparing size of former metrics; (6)applying corresponding code mode for coding. Compared with method in H.264, this invention can improve coding rate greatly.

Description

technical field [0001] The invention relates to the field of video compression, and designs and implements a video compression method based on time-space correlation. Background technique [0002] With the widespread application of multimedia technology in recent years, as the basis of multimedia information technology, video compression methods play an important and irreplaceable role, which can greatly reduce the requirements for storage media capacity and transmission bandwidth. The requirements of information technology for video compression methods are higher and higher compression ratios, better and better compression quality, and faster and faster compression speeds. [0003] Due to the redundant information among the video information, using the correlation of the video information itself, through some special technology, the redundant information in the video data can be removed to achieve the purpose of video compression. In video compression technology, I-frame (...

Claims

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Application Information

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IPC IPC(8): H04N7/24H04N19/103H04N19/51
Inventor 贾克斌谢晶刘鹏宇
Owner BEIJING UNIV OF TECH
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