Video intra-frame encoding method based on space domain decomposition

A video frame and intra-coding technology, applied in digital video signal modification, television, electrical components, etc., can solve the problems of not fully utilizing the spatial correlation of I frames and low compression ratio, so as to save code flow, improve compression efficiency, The effect of objective quality improvement

Inactive Publication Date: 2009-03-18
BEIHANG UNIV
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  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of the fact that the existing technology does not fully utilize the inherent spatial correlation in the I frame and has the defect of low compression ratio, the purpose of the present invention is to propose a new video intra-frame coding method based on spatial domain decomposition / synthesis

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  • Video intra-frame encoding method based on space domain decomposition
  • Video intra-frame encoding method based on space domain decomposition
  • Video intra-frame encoding method based on space domain decomposition

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Embodiment Construction

[0024] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0025] figure 1 The basic implementation process of the video intra coding method is shown.

[0026] In the I frame encoding process, the code stream generated by the video data after prediction, transformation and quantization, and entropy coding is stored in the code stream buffer area, and the code stream can be used for storage or transmission; at the same time, the quantized coefficients need to be dequantized, transformed, Compensate to generate a reconstruction block, which can be used as a reference frame when encoding a reference frame of a subsequent frame. Among them, transformation and quantization is to perform two-dimensional integer DCT transformation and quantization operations on the input video data in units of blocks, which eliminates data redundancy. In H.264, the multiplication in the two processes of change and quantizati...

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Abstract

This invention discloses an intra-frame coding method based on airspace decomposition. The method comprises decomposing I frame into a basic sub-frame and three predication sub-frames, and encoding the four sub-frames orderly, using a quick mode selection algorithm for the base sub-frame to carryout the sub-frame predication, carrying out the sub-frame compensation according to the selected optimum mode, taking the reestablished sub-frame as a reference frame, carrying out the predication and compensation among the sub-frames for the predicated sub-frames, synthesizing the reestablished sub-frames of the four sub-frames, forming the reestablished frame of the I frame. The result of the experiment indicates that the perceived quality of the reestablished frame is better than that of the reestablished frame of the recommended algorithm in the H.264 reference software JM9 when PSNR values are identical.

Description

technical field [0001] The present invention relates to a method for intra-frame encoding of video, in particular to a method for encoding I-frames of video, decomposing I-frames into basic sub-frames and predicted sub-frames in the spatial domain, utilizing the spatial correlation in the sub-frames to Intra-sub-frame prediction and compensation for basic sub-frames, inter-sub-frame prediction and compensation for predicted sub-frames by using the temporal correlation between sub-frames, so as to synthesize reconstructed sub-frames into I-frames and reconstructed frames. The field of video processing technology. Background technique [0002] Video images are intuitive, vivid, and rich in content, and are one of the most important information carriers for human beings. Especially in today's information society, digitized video images have been widely used in various aspects such as industrial and agricultural production, daily life and military reconnaissance. With the rapi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/26H04N7/34H04N7/50H04N19/593
Inventor 李波宋建斌乔淑娟
Owner BEIHANG UNIV
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