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Method for realizing rapid video coding by adopting hierarchical structure anticipation

A technology of layered structure and video coding, applied in the fields of digital video signal modification, television, electrical components, etc., which can solve the problems of increased calculation amount and decreased H.264 coding speed.

Inactive Publication Date: 2011-09-14
BEIJING UNIV OF TECH
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Problems solved by technology

Although this method can select the inter-frame prediction mode with optimal rate-distortion significance, the amount of calculation is significantly increased, resulting in a decrease in the encoding speed of H.264, which has become one of the bottlenecks limiting its application in the field of real-time video

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  • Method for realizing rapid video coding by adopting hierarchical structure anticipation
  • Method for realizing rapid video coding by adopting hierarchical structure anticipation
  • Method for realizing rapid video coding by adopting hierarchical structure anticipation

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Embodiment Construction

[0060] The present invention will be further described in detail below in conjunction with the description of the drawings and specific embodiments.

[0061] In view of the fact that human eyes are more sensitive to luminance information than chrominance information, the method of the present invention encodes the luminance component in the video sequence. First read in the video sequence in YUV format, extract its luminance component, and the encoder calls the fast encoding module of the present invention to complete video compression encoding.

[0062] In the specific implementation, the following procedures are completed in the computer:

[0063] Step 1. Start inter-frame predictive coding, such as Figure 4 The first step shown: read in the video sequence in YUV format according to the encoding configuration file encoder.cfg, and configure the encoder according to the parameters in the configuration file. For example: the number of encoded frames FramesToBeEncoded; frame...

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Abstract

The invention discloses a method for realizing rapid video coding by adopting hierarchical structure anticipation, which relates to the field of video compression coding. The method comprises the following steps of: extracting the brightness information of a current coded macro block from original video data; defining, calculating and comparing time / space correlation characteristics of the current coded macro block, and anticipating whether the macro block may adopt inter-frame prediction or intra-frame prediction; and if the macro block adopts the inter-frame prediction, defining and calculating the flatness characteristic of the macro block, dividing the current coded macro block into one type of a flat macro block, a texture-rich macro block and a characteristic-unremarkable macro block according to the flatness characteristic, anticipating a set of inter-frame prediction mode to be adopted in a targeted way, determining an optimal inter-frame prediction mode in advance to realize rapid inter-frame compression coding. By the method provided by the invention, the inter-frame coding complexity and coding time are greatly reduced on the premise of ensuring lossless video quality, not increasing compression code rate and keeping an output code stream structure, and the high performance of high compression ratio of a conventional standard algorithm is maintained.

Description

technical field [0001] The invention relates to the field of video compression coding, and designs and realizes a fast video coding method with hierarchical structure prediction. Background technique [0002] Video sequences mainly include three kinds of redundant information: spatial redundancy, temporal redundancy, and statistical redundancy. Usually, by utilizing the correlation of video information itself, redundant information in video data can be removed to achieve the purpose of video compression. In video compression, I-frame and P(B) frame coding technologies are mainly used; I-frame is an intra-frame coding method, that is, a certain frame in the video is coded separately to eliminate spatial redundancy; P(B) frame is a frame The inter-coding method uses the correlation of adjacent frames to eliminate temporal redundancy; then uses the entropy coding method to eliminate statistical redundancy. [0003] As the latest video coding standard, H.264 / AVC (hereinafter r...

Claims

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Application Information

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IPC IPC(8): H04N7/26H04N7/34H04N19/103H04N19/136
Inventor 刘鹏宇贾克斌
Owner BEIJING UNIV OF TECH
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