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Motion estimation method of using criterion of matching diagonal

A motion estimation and diagonal technology, applied in television, electrical components, digital video signal modification, etc., can solve the problems of large amount of calculation and increased difficulty of hardware, and achieve the effect of reducing the amount of calculation and difficulty of calculation

Inactive Publication Date: 2009-09-23
XIAN UNIV OF TECH
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these matching criteria have an obvious disadvantage, that is, the amount of calculation is too large, which greatly increases the difficulty of hardware implementation.

Method used

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  • Motion estimation method of using criterion of matching diagonal
  • Motion estimation method of using criterion of matching diagonal
  • Motion estimation method of using criterion of matching diagonal

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Embodiment Construction

[0016] Motion estimation is to only describe the displacement of the current block relative to the reference block when encoding the current block, without specifically describing its content, so as to achieve the purpose of removing temporal redundancy between video information.

[0017] The frame to be transmitted is used as the current frame, and the transmitted image as a reference is called the reference frame. The specific method for motion estimation is:

[0018] In the first step, each frame of image is divided into N×N macroblocks.

[0019] In the second step, each image block of the current frame is matched with all image blocks corresponding to the search area in the reference frame, and the best matching block is found.

[0020] The third step is to output the row and column coordinates of the best matching block, that is, the motion vector MV (motionvector), which completes the motion estimation.

[0021] In the second step above, find the best matching block, th...

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Abstract

A motion estimation method using the diagonal matching criterion disclosed in the present invention firstly divides each frame of image into N×N macroblocks; The best matching block; finally output the row and column coordinates of the found best matching block, that is, the motion estimation is completed. The diagonal matching adopted by the motion estimation method of the present invention only needs to compare the pixel points on the two diagonal lines of the two comparison image blocks, and does not need to compare each point, thereby greatly reducing the The calculation amount and calculation difficulty of motion estimation are easy to realize by hardware.

Description

technical field [0001] The invention belongs to the technical field of image compression and transmission, and relates to a method for motion estimation in image compression, in particular to a method for motion estimation using a diagonal line matching criterion. Background technique [0002] Video signals in reality contain a large amount of redundant information, which can be removed by data compression, that is, to remove the autocorrelation and cross-correlation of time-space functions between these information data, and to retain mutually independent information components. Removing these redundant information can save storage space, improve transmission efficiency, and at the same time make it possible for video information to be transmitted in real time on a channel with a lower rate. Redundant information mainly includes spatial redundancy and temporal redundancy, of which temporal redundancy accounts for 60% to 80% of the entire video compression coding, which dire...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N7/26H04N19/176H04N19/51
Inventor 余宁梅廖裕民李杨王冬芳
Owner XIAN UNIV OF TECH