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Method and apparatus for fast mode selecting of H264 video coding

A mode selection and video coding technology, which is applied in the field of video coding mode selection, can solve problems such as high coding complexity, application limitations, and large amount of calculation, and achieve the effect of reducing the number, reducing the amount of calculation, and reducing the number

Inactive Publication Date: 2008-06-25
车主邦(北京)科技有限公司
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Problems solved by technology

[0005] The purpose of the present invention is to provide a method and device for fast mode selection of H264 video encoding, which solves the problem of application limitation caused by excessive encoding complexity, excessive calculation amount, and excessive time consumption in the prior art

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  • Method and apparatus for fast mode selecting of H264 video coding

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Embodiment Construction

[0042] The present invention proposes a fast mode selection method for H264 video coding, figure 1It is a flow chart of the steps of the method of the present invention. As shown in the figure, the present invention is divided into two parts: an intra-frame algorithm flow 101 and an inter-frame algorithm flow 102. In the fast inter-frame mode selection algorithm, the present invention uses the sum of absolute differences (SAD, Sum of Absolute Difference) of the corresponding pixels of the macroblock corresponding to the current frame and the reference frame as the correlation judgment, and divides the macroblock into different The mode of fineness; then according to the direction information of the inter-frame motion of the macroblock, further obtain the preferred prediction mode, and finally use the rate-distortion optimization (RDO) in the preferred prediction mode to determine the best mode. For the fast intra-frame mode selection algorithm, the present invention can firstl...

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Abstract

The invention discloses a quick mode selection method and a device of an H264 video coding. The method comprises the selection of a mode in frames and the selection of the mode between the frames, wherein, for the selection of the mode in the frames, a prediction method with different fineness is chosen according to the dramatic degree of the image information changes in the prior macro block, thereby decreasing the number of the model to be chosen and confirming the final selection mode through the method of code rate-distortion factor optimizing; for the selection of the mode between the frames, the sum of the absolute difference of the corresponding pixel point of the corresponding macro block of the prior frame and the reference frame is used as a dividing basis to divide the macro block into different fineness and to correspondingly choose a prediction method with different fineness for decreasing the number of the model to be chosen and confirming the final selection mode through the method of code rate-distortion factor optimizing. The invention can decrease the number of the model to be chosen and solve the application limited problems caused by over-complicated code, over-loaded operation and over time consumption in the prior art.

Description

technical field [0001] The present invention relates to a method for selecting a video encoding mode, in particular to a method and device for selecting a fast mode of H264 video encoding. Background technique [0002] Compared with the familiar H.263, the video image quality under the H.264 standard is better, while the coding efficiency can be increased by more than 50%, and it has better error tolerance, which makes it widely used in the field of video communication in the future. application prospects. However, the H.264 / AVC encoding technology in the prior art is defective. This is because, according to the definition of rate-distortion optimization (RDO) in H.264 / AVC, when encoding a video sequence, all prediction modes must be used to test the frame image, and then find one from the perspective of RDO. The best prediction mode greatly increases the complexity of encoding calculations, increases encoding time consumption, and deteriorates the real-time performance of...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/26H04N7/32H04N19/103H04N19/147H04N19/176H04N19/503H04N19/593
Inventor 李文杰
Owner 车主邦(北京)科技有限公司
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