Motion estimating method for H.264/AVC coder

A technology of motion estimation and motion vector, applied in the field of motion estimation, can solve problems such as high real-time requirements, staggering amount of calculation, and unsatisfactory calculation time

Active Publication Date: 2007-03-21
CHINASYS TECH
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Problems solved by technology

[0004] Although the global search method can get the best motion estimation result, its calculation amount is astonishing, and it needs frequent access to the memory storing the reference frame, which requires a long calculation time
The H.264 / AVC standard is used in video communication, digital broadcasting, network TV streaming media transmission and other fields, and has high requirements for real-time performance. Such a large amount of calculation and calculation time cannot meet this requirement.

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  • Motion estimating method for H.264/AVC coder
  • Motion estimating method for H.264/AVC coder
  • Motion estimating method for H.264/AVC coder

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Embodiment Construction

[0077] The notable feature of the present invention is that according to the working principle of H.264 / AVC motion estimation, the data correlation between integer motion estimation and fractional motion estimation in the motion estimation process, and the requirements of video communication applications for compressed image quality, a partial parallel motion estimation method. The motion estimation method proposed by the present invention allows the integer motion estimation and the fractional motion estimation to be partially executed in parallel, so as to achieve the purpose of improving the motion estimation speed.

[0078] Another feature of the present invention is that a motion vector prediction value generation method and a reasonable search range are adopted, so that the motion estimator system of the present invention can share the search area of ​​the reference frame when performing integer motion estimation. Data, each sub-block of the current macroblock can share ...

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Abstract

A motion estimating method of H.264 / AVC coder divides integer motion estimation to be rough layer and fine layer being estimated separately in sequence then inputting parallel interpolation of half pixel and fine layer motion estimation into reference frame data and integer pixel data of rough layer motion vector separately and carrying out half pixel motion estimation as well as quarter pixel motion estimation for calculating out final minimum residual error and its corresponding final motion vector by utilizing motion vector corresponding to minimum residual error under optimum prediction mode obtained from rough layer motion estimation.

Description

technical field [0001] The present invention relates to a motion estimation method, in particular to a hardware realization of a fast motion estimation method for an H.264 / AVC coder. Background technique [0002] The H.264 / AVC standard is a video compression for low-bit-rate video communication applications jointly developed by the VCEG (Video Experts Group) of ITU-T and the MPEG (Moving Picture Experts Group) of the International Organization for Standardization ISO. standard, but its excellent compression performance makes its role not limited to this. has received extensive attention and research. The compression ability of the H.264 / AVC standard for moving images is largely due to the motion estimation algorithm it adopts, that is, the 16*16 pixel block is defined as a macroblock (MB), and each Macroblocks can be divided into 16*16, 16*8, 8*16, 8*8, 8*4, 4*8 or 4*4 sub-blocks with different sizes and shapes. The way the blocks are divided is called the prediction mode...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/26H04N19/156H04N19/157H04N19/176H04N19/51H04N19/513H04N19/523
Inventor 罗嵘杨春雷杨华中
Owner CHINASYS TECH
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