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Adaptive frame structure-based AVS coding method

A coding method and frame structure technology, applied in the field of video signal processing, can solve the problems of low image quality stability and subjective quality degradation

Active Publication Date: 2010-06-02
SICHUAN CHANGHONG ELECTRIC CO LTD
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Problems solved by technology

[0007] The purpose of the present invention is to solve the problem of low image quality stability and subjective quality decline in the existing AVS encoding method using a fixed GOP structure, and to provide an AVS encoding method based on an adaptive frame structure, which is oriented to the application of AVS Internet video storage , making the encoding process more consider the characteristics of the sequence, improving the stability of the subjective quality of the video reconstruction image, and eliminating the mosaic phenomenon caused by AVS encoding when the scene is switched and the movement is violent

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Embodiment Construction

[0030] The present invention will be further described below in combination with specific embodiments and accompanying drawings.

[0031] An AVS coding method based on an adaptive frame structure is to detect the scene switching frame by frame, combine the correlation and complexity of the image to judge the coding type of each frame of image, and then according to the determined coding type, automatically Adapt to the frame structure, re-arrange the frame sequence to realize its image coding.

[0032] Such as figure 1 As shown, the specific process of the above method is:

[0033] a0. Initialize the parameters, set the encoding parameters including the encoding frame rate, and set the threshold T of scene switching s and the maximum value B of consecutively inserted B frames max , set the number of reference frames (in this embodiment, adopt the general reference frame number of AVS, that is, the number of reference frames is 2) and the maximum value I of the I frame inter...

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Abstract

The invention relates to an Adaptive frame structure-based AVS coding method and relates to a method for processing video signals. According to the method, the scene switch is detected by reading a video coded image frame by frame, and the relevance and the complexity of the adjacent frames are analyzed at the same time; coding types of the images to be coded is judged, and a coding order of the images is adjusted to determine the selection of the reference frames. By considering the characteristics of video sequences, the method ensures the compression efficiency of the video images, can greatly improve the subjective quality and the stability of the AVS video reconstruction images, and eliminate a mosaic appearance caused by the AVS coding in the process of scene switch or violent motion. The method can be used in the video sequences in one scene or a plurality of scenes.

Description

technical field [0001] The invention relates to a video signal processing method, in particular to an AVS encoding method. Background technique [0002] Digital audio and video coding technology standard AVS is my country's first second-generation source coding standard with independent intellectual property rights. Its compression efficiency and competitiveness are comparable to the international standard H.264 / AVC, and more than twice that of MPEG-2. [0003] The main function of prediction based on motion compensation is to eliminate redundant information in the time domain of video, and most of the efficiency of video coding comes from the prediction module. The process of video encoding is the process of encoding each frame of the video sequence. [0004] A common video coding system is to code a frame of image, which is performed with a macroblock as a basic unit. When coding each frame of image, it is divided into intra-frame (I frame) coding, predictive (P frame) c...

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Application Information

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IPC IPC(8): H04N7/32H04N7/26H04N19/105H04N19/142H04N19/177
Inventor 曾超展华益刘明华
Owner SICHUAN CHANGHONG ELECTRIC CO LTD
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