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AVS-based different modes fast searching method

A search method and mode technology, applied in the field of digital video coding, can solve problems such as difficult to meet real-time coding requirements

Inactive Publication Date: 2008-07-23
CENT ACADEME OF SVA GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above two methods are difficult to meet the real-time encoding requirements of high-resolution video and large search range

Method used

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  • AVS-based different modes fast searching method

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Embodiment Construction

[0023] The AVS-based fast search method for different modes of the present invention will be further described in detail below.

[0024] This embodiment provides an AVS-based fast search method for different modes, and the search range is 128*64. Perform pixel search on the current four macroblock division modes: 16*16, 16*8, 8*16, 8*8, the first to fifth registers are used to store different residual values, and the search method includes the following steps :

[0025] Step 1: Perform an integer pixel search on the 4 division modes of the current macroblock to obtain the best matching block in each mode, and make a mode judgment. The mode with the smallest residual value is taken as the current mode type, and the integer pixel The best matching block is divided into four 8*8 sub-blocks;

[0026] Step 2: Carry out a half-pixel search on the 8*8 sub-block 1, put the residual data of each matching point into the first register, and use a comparison algorithm to find the best m...

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Abstract

The invention provides a method for rapidly searching on the basis of different modes of AVS, the invention completes a mode judgment in integral pixel search, and determines an optimal matching point in sub-pixel search, the sub-pixel comprises a 1 / 2 searching precision and a 1 / 4 searching precision, the searching method can effectively reduce the treatment cycle of the motion searching and decrease the occupied resources.

Description

technical field [0001] The invention relates to digital video coding technology, in particular to an AVS-based fast search method for different modes. Background technique [0002] AVS is an audio and video coding technology standard independently formulated by China. It is equivalent to the most advanced H.264 / AVC framework in the world. At the same time, it fully considers the implementation complexity. Under the premise of equivalent compression efficiency, it is better than the implementation of H.264 / AVC. The complexity is greatly reduced. For motion search, AVS supports 4 block division modes: 16*16, 16*8, 8*16, 8*8. Compared with the seven block division modes of H.264 / AVC: 16*16, 16*8, 8*16, 8*8, 8*4, 4*8, 4*4, it has been greatly simplified, but the motion search The computational complexity is still very high, accounting for about 60% to 80% of the computational load of the entire encoder, which is not conducive to real-time applications. Moreover, the processin...

Claims

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Application Information

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IPC IPC(8): H04N7/26H04N7/36H04N7/50H04N19/182H04N19/61
Inventor 滕国伟郭凤潘琤雯杨涵悦张兆扬
Owner CENT ACADEME OF SVA GROUP