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Derivable motion compensation prediction method of decoding terminal

A motion compensation prediction and motion compensation technology, applied in the field of communication, can solve the problem of not considering the motion characteristics of zoom video and so on

Inactive Publication Date: 2012-07-11
SHANDONG UNIV
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AI Technical Summary

Problems solved by technology

[0009] The motion compensation prediction method adopted by H.264 / AVC does not take into account the inherent motion characteristics of zoom video, and needs to encode the motion vector of each coding block, so the coding efficiency of zoom video needs to be further improved

Method used

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  • Derivable motion compensation prediction method of decoding terminal
  • Derivable motion compensation prediction method of decoding terminal
  • Derivable motion compensation prediction method of decoding terminal

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Embodiment Construction

[0051] In the specific application of the present invention, the encoder and the decoder need to be changed at the same time. The specific processes of the encoding end and the decoding end are as follows.

[0052] The encoding process is as follows figure 1 As shown, it specifically includes the following steps:

[0053] Step 1: Determine the motion vectors (mv x，i , mv y，i ), i∈{1L N} and its block coordinates (x i ,y i ), i∈{1, L N};

[0054] Step 2: According to the motion vector (mv x，i , mv y，i ), i∈{1L N} and its block coordinates (x i ,y i ), i∈{1, L N}, establish the following two equations,

[0055]

[0056]

[0057] And use linear regression calculation to determine the parameter a hor , b hor , a ver , b ver ,

[0058] a hor = N · Σ i = 1 ...

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Abstract

The invention discloses a derivable motion compensation prediction method of a decoding terminal. The method comprises the steps of firstly, obtaining motion vectors and coordinates of encoding blocks on the left side, the upper side and the upper right side of an adjacent encoding block, and working out model parameters; secondly, determining the initial value of a candidate motion vector of thecurrent encoding block according to the model parameters obtained by computing; thirdly, modifying the initial value of the candidate motion vector to obtain candidate motion vector set, and selecting an optimum candidate motion vector from the candidate motion vector muster; fourthly, performing compensation prediction according to the optimum candidate motion vector, and computing a rate-distortion cost when the optimum candidate motion vector is adopted to perform the compensation prediction; and fifthly, performing prediction on the current encoding block by adopting a motion compensationprediction method in H.264 / AVC, and selecting a motion compensation prediction method with the lowest rate-distortion cost to perform prediction. The method can save motion vector information, and improves the compression efficiency of a zoom video; and simultaneously, when an encoding terminal is not required to encode the model parameters, the decoding terminal can directly determine the model parameters.

Description

technical field [0001] The invention relates to a motion compensation prediction method in video coding, which belongs to the technical field of communication. Background technique [0002] With the rapid development of network technology, the maturity and improvement of video coding technology, and the continuous improvement of transmission technology, video services have been widely used. How to better realize efficient video coding has always been a research hotspot in the video field. H.264 / AVC provides a variety of intra-frame and inter-frame prediction modes, multiple macroblock (MB) division methods, hierarchical B-frame coding structure, and rate-distortion optimization technologies, so it has high compression performance. H.264 / AVC is currently the video coding standard with the best coding performance. [0003] In actual video applications, there are many zoom videos, that is, the size of the main object in the video changes regularly from large to small or from ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N7/26H04N7/50H04N19/52
Inventor 元辉刘琚孙建德
Owner SHANDONG UNIV
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