Video image predictive search method based on h.264/avc standard

A technology of video image and search method, which is applied in the field of video image predictive search, can solve the problems that affect the real-time requirements of H.264/AVC encoding, unfavorable real-time transmission of video images, and a large number of search blocks, so as to improve search efficiency and predict Accuracy, reduced search span, reduced search points and the effect of occupying search resources

Active Publication Date: 2019-05-03
THE 41ST INST OF CHINA ELECTRONICS TECH GRP
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Problems solved by technology

[0008] The MSSM search method has high search accuracy, especially for the violent motion part of the video image. Transmission, which affects the real-time requirements of H.264 / AVC encoding, needs further improvement

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  • Video image predictive search method based on h.264/avc standard
  • Video image predictive search method based on h.264/avc standard
  • Video image predictive search method based on h.264/avc standard

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Embodiment Construction

[0021] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, so as to define the protection scope of the present invention more clearly.

[0022] see figure 2 , the embodiment of the present invention includes:

[0023] A video image predictive search method based on the H.264 / AVC standard, comprising the following steps:

[0024] (1) With 8*8 as the search block, calculate the MAD value of the center point of the search window;

[0025] The mean absolute error method MAD is defined as follows:

[0026] In the formula: (m, n) is the pixel position of the image, M and N are the number of rows and columns of the image respectively, f k (m,n) is the original image pixel gray value, f k-1 (m+i,n+j) is the gray value of the predicted image pixel.

[0027] (2) Determine a maximum ...

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Abstract

The invention discloses a video image prediction search method based on H.264 / AVC standard. The video image prediction search method based on the H.264 / AVC standard comprises the steps of halving the step size in first-time search, using the step size as first-time search step size, using a searched MBD point as a new search point and using one half of the original search step size as new search step size for research if the searched MBD point is a central point, using the MBD point as the new search point and using the original search step size as the step size in current search for research if the searched MBD point is not the central point, halving the search step size when the MBD point becomes the central point, repeating the steps till the search step size is 1 and a final matched MBD point is searched, and completing search. In the mode, the search span is greatly decreased, the search point number and occupied search resources are decreased, real-time transmission performed through a video push line is facilitated, and search efficiency and prediction accuracy are further improved.

Description

technical field [0001] The invention relates to the field of wireless or wired communication, in particular to a video image predictive search method based on the H.264 / AVC standard. Background technique [0002] With the development of network and multimedia technology, the Video Coding Experts Group (VCEG) cooperated with the Moving Picture Experts Group (MPEG) to establish the Joint Video Team (JVT), and officially released the H.264 / AVC (MPEG) in May 2006. -4 Part X of the standard). Due to high coding efficiency and good network adaptation, the H.264 / AVC standard is widely used in video services on the Internet. [0003] H.264 / AVC uses layered motion estimation, including two levels of integer pixel motion estimation and 1 / 4 pixel motion estimation. The block size of its whole-pixel motion estimation adopts an adaptive method. The basic idea is that relatively large motion blocks are used in slow motion or relatively static parts of the video image to reduce the numbe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N19/56H04N19/513
Inventor 凌云志赵润年徐波李小冲
Owner THE 41ST INST OF CHINA ELECTRONICS TECH GRP
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