Method for controlling three-dimensional video code rates

Abstract

The invention discloses a method for controlling three-dimensional video code rates, comprising the steps of obtaining target bit for encoding a current three-dimensional image according to a general target bit number and an initial quantization parameter; then obtaining target bit and encoding quantization parameters respectively for encoding a left viewpoint image and a right viewpoint image ofthe current three-dimensional image by building a module on the relation among an encoding quantization parameter value of the left viewpoint image, an encoding quantization parameter difference value between the left and the right viewpoint images and corresponding peak signal to noise ratio difference values of the left and the right viewpoint images; and finally, encoding the left viewpoint image and the right viewpoint image respectively according to the target bit and the encoding quantization parameters. With the method, on the premise of ensuring that the output code rate of encoding satisfies the restriction of actual bandwidth, the quality of left and right channels is controlled in the smallest threshold range of change step which can be perceived by human eyes.

Description

technical field [0001] The invention relates to a video signal processing method, in particular to a stereoscopic video code rate control method. Background technique [0002] Since the beginning of this century, with the digital 2D (two-dimensional) video technology becoming more and more mature, and the rapid development of computer, communication and network technology, people have a strong demand for a new generation of video systems. The current two-dimensional video system is difficult to meet the user's needs for three-dimensionality and viewpoint interaction when representing natural scenes. The 3D video system is more and more popular because it can provide a brand-new visual experience with three-dimensional sense and viewpoint interaction. . MPEG and ITU-T, an international standard organization, have also carried out related work on the formulation of stereoscopic video compression application standards. [0003] Existing studies on stereoscopic video coding h...

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Problems solved by technology

[0004] Some rate control methods for single-view video have been proposed, such as TM5 of MPEG-2, TMN8 of H.263, VM8 of MPEG-4, and JVT-G012 of H.264. The algorithm cannot be directly applied to dual-channel stereoscopic video. This is because: on the one hand, because the current rate control method uses different rate-distortion models to reflect the source coding characteristics, it ignores the quality control of the left and right viewpoint videos; On the other hand, since there is a compromise between the output bit rate of stereoscopic video encoding and the quality of the output left and right channels, how to control the target bit rate during the encoding process and make the quality of the left and right channels The gap is within the minimum detectable change step threshold range of the human eye, and maintains relative stability to improve the effectiveness of the method, all of which need to be studied and solved in the process of bit rate control for stereoscopic video

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