Coding and decoding methods and devices for three-dimensional video

Abstract

The invention discloses a coding method for a three-dimensional video. The method comprises the following steps of: inputting a first frame image which comprises image texture information and depth information at a plurality of different viewpoints at the same time so as to form depth pixel images of the plurality of the viewpoints; selecting a viewpoint which is closest to a center as a main viewpoint and mapping the depth pixel image of each viewpoint onto the main viewpoint; acquiring motion information from the texture information by a motion target detection method, rebuilding all depth pixel points in the mapped depth pixel images by using the depth information and / or the motion information to acquire a background image layer image and one or more foreground image layer images; and coding the background image layer image and the foreground image layer images respectively, wherein the depth information and the texture information are coded respectively. The invention also discloses a decoding method for the three-dimensional video, a coder and a decoder. The coding method is particularly suitable for coding a multi-viewpoint video sequence with a stationary background, can enhance prediction compensation accuracy and decreases code rate on the premise of ensuring subjective quality.

Description

technical field [0001] The invention belongs to the technical field of digital video compression encoding, and in particular relates to an efficient encoding and decoding method and device for three-dimensional video with static background scenes. Background technique [0002] In recent years, with the emergence of various multimedia services, the demand for virtual reality experience is increasing, and various 3D video technologies are also being continuously developed, promoted and applied. The core of 3D video is to provide different image information according to different viewpoint positions, so as to achieve an immersive experience. Therefore, the coding of multi-view video has become a key technology of 3D video service. [0003] The earliest multi-view video coding adopts the form of two-way or multi-way video predictive coding, and the code stream compression is realized through inter-view reference and inter-frame reference. The two-way images in this form are re...

AI Technical Summary

Problems solved by technology

However, this patent does not consider the coding characteristics of 3D video, so it cannot be well applied to 3D video coding

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