High efficiency video coding sensing rate-distortion optimization method based on structural similarity

Abstract

Provided is a high efficiency video coding sensing rate-distortion optimization method based on structural similarity. The high efficiency video coding sensing rate-distortion optimization method based on the structural similarity comprises the following steps that (1) calculation of image distortion is carried out by using the structural similarity as the evaluation criterion of distortion before the coding end of a high efficiency video coder carries out mode judgment, and the calculation of the image distortion is used for replacing calculation of a coded image distortion value in the process of rate-distortion judgment carried out by the coding end of the high efficiency video coder; (2) Lagrangian multipliers in the process of high efficiency video coding rate-distortion judgment calculation are corrected according to the motion intensity consistency between every two adjacent zones on a space domain and a time domain of a coded image, and rate-distortion optimization calculation of a current coding region is carried out. According to the high efficiency video coding sensing rate-distortion optimization method based on the structural similarity, due to the facts that the structural similarity serves as the evaluation criterion of image distortion, spatial correlation and time correlation of a former frame and a later frame in the process of interframe coding are used for deducing the motion intensity consistency of the current coding region, and accordingly, parameters used in the process of the rate-distortion judgment are corrected, sensing visual quality of the coded image is greatly improved under the condition that the calculation complexity is not greatly improved.

Description

technical field [0001] The invention belongs to the technical field of video coding and decoding, in particular to a high-efficiency video coding perceptual rate-distortion optimization method based on structural similarity. Background technique [0002] In recent years, high-definition / ultra-high-definition video coding technology, as the basic core technology of future home theater, digital broadcast TV, network video, high-definition movie and other services, has become the focus of the industry. For high-definition / ultra-high-definition video communication, there is still a certain gap between the compression ratio of the existing video coding standards and the actual application requirements. To this end, the International Organization for Standardization ISO / IEC (MPEG) and ITU-T initiated the planning of the next-generation digital video compression standard - High Efficiency Video Coding (HEVC), aiming at H.264 / AVC high-level On the basis of , the compression efficie...

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Problems solved by technology

This description method has the advantages of simple calculation and easy implementation, but it cannot reflect the subjective visual characteristics of the human eye very well.

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