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Vidio motion estimation method

A technology of motion estimation and video, applied in the field of motion estimation, can solve the problems of not being able to make full use of the spatial correlation of motion vectors, the uneven distribution of motion estimation performance, and the high cost of implementation, so as to achieve a simple and efficient implementation method and reduce the amount of calculation , the effect of reducing the cost of implementation

Inactive Publication Date: 2003-09-24
HANGZHOU NATCHIP SCI & TECH
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AI Technical Summary

Problems solved by technology

[0005] Many existing motion estimation methods have some defects: the amount of calculation is too large, and the cost of implementation is high, such as the full search algorithm; assuming the monotonicity of the error surface, it is easy to fall into local optimum, such as some classic block matching methods , such as the three-step method
Using a fixed order for block matching search does not make full use of the correlation of the motion vector space, and the performance of motion estimation is not evenly distributed in the image space.

Method used

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  • Vidio motion estimation method

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Embodiment Construction

[0027] figure 1 It is the traditional method to perform block matching search on blocks of the current frame / field from left to right and from top to bottom to estimate the motion vector.

[0028] figure 2 The block matching search is performed on the blocks of the current frame / field in the order from top to bottom alternately from left to right and from right to left to estimate the motion vector.

[0029] image 3 It uses the order from the four sides to the center to perform a block matching search on the block of the current frame / field to estimate the motion vector.

[0030] Figure 4 explained figure 2 Selection of the next candidate vector in the search order. The black block in the figure represents the current pixel block, and the motion vector of the block drawn with diagonal lines is the candidate vector. For the pixel block searched from left to right, the three candidate vectors are the motion vector of the adjacent block on the left of the current block, the ...

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Abstract

This invention relates to a method for estimating movement using its vector site spacetime coherence based on searching mode including the following steps: determining a group of candidate vectors according to the movement vectors of several blocks near the present block to apply a renew structure based on the sequence of block matched search, computing pel block error of the same position in thepresent pel block and reference frame, determining the vector with the minimum error as the movement vector and carrying out mean value filter to the estimated movement vector for smoothing the vector site.

Description

Technical field [0001] The present invention belongs to the technical field of digital video processing, and particularly relates to a method for performing motion estimation using the spatio-temporal correlation of a motion vector field based on a block matching search order. Background technique [0002] For a long time, motion estimation technology has been widely used in the fields of video compression coding and digital video format conversion. In order to minimize the bandwidth required to transmit digital video data of a given image quality, a variety of different video compression algorithms have been developed to compress video data. Several multimedia technical specification committees have established and proposed standards for encoding / compressing audio and video data. Among them, the well-known and widely accepted international standards are provided by the Moving Picture Experts Group (MPEG), including MPEG-1 and MPEG-2 standards. [0003] Vide...

Claims

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Application Information

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IPC IPC(8): H04N19/513H04N19/533
Inventor 王维东陈涛张明谢磊
Owner HANGZHOU NATCHIP SCI & TECH
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