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Background-based motion estimation coding method

A motion estimation and coding method technology, applied in the coding field of motion estimation, can solve the problem of high computational complexity of coding processing, and achieve the effects of improving coding efficiency, easy implementation and simple method design.

Inactive Publication Date: 2007-08-01
TSINGHUA UNIV
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Problems solved by technology

This can improve the encoding efficiency of the "exposed area", but the computational complexity of the encoding process is too high, and at the same time, additional processing delay time is introduced at the decoding

Method used

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  • Background-based motion estimation coding method
  • Background-based motion estimation coding method
  • Background-based motion estimation coding method

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Embodiment

[0038] The scene selected in this embodiment is a corner of an office, as shown in FIG. 5 . The video data is acquired by the surveillance camera, the sequence has a total of 1370 frames, the frame rate is 25 frames per second, and the image size is 176 pixels × 144 pixels. Since the image size is 176 pixels × 144 pixels, and the macroblock size is 16 pixels × 16 pixels, there are 11 × 8 macroblocks in the background frame, which is represented by a two-dimensional array variable b[11][8] in this embodiment The state of each macroblock in the background frame, the value of the array variable is 0, indicating that the state of the corresponding macroblock is "undecided", and the value of the array variable is 1, indicating that the state of the corresponding macroblock is "determined". The credibility N of the background frame macroblock uses a two-dimensional array variable d[11][8], and the value of each variable represents the credibility of the corresponding position macrob...

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Abstract

The related motion estimation coding method based on background in digital video code compression technology comprises: initiating the background frame, reading in a frame image to decide its code type, completing coding to current frame by traditional frame inner coding method if the image is I frame; or reading in a macro block if the image id P frame, then coding the block with traditional frame inner coding method if the block is I type, or coding as both traditional reference frame motion estimation and background frame reference motion estimation if the block is P type, and updating current background frame during coding to generate current background frame. This invention improves coding efficiency, special useful to video monitor and conference.

Description

technical field [0001] The invention belongs to the technical field of digital video coding and compression, in particular to a coding method for motion estimation. Background technique [0002] Digital video refers to video information recorded in digital form, and the corresponding phrase in English is Digital video. The original data volume of digital video is very large, which brings great inconvenience to transmission and storage, so coding and compression are often required in practical applications. [0003] Video coding adopts the method of motion estimation to realize data compression. Video data is a sequence of images collected continuously at fixed time intervals. Due to the fast acquisition speed, the content of adjacent images has a strong correlation. Motion estimation is to use this correlation between images to eliminate redundant information and realize data compression. The general process of the motion estimation method is as follows: first, the curren...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/26H04N7/32H04N19/176H04N19/51H04N19/517
Inventor 戴琼海于志涛尚明海
Owner TSINGHUA UNIV
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