Rapid depth image frame internal mode type judgment method aiming at 3D-HEVC (Three Dimensional- High Efficiency Video Coding) standard

Abstract

The invention provides a rapid depth image frame internal mode type judgment method aiming at a 3D-HEVC (Three Dimensional- High Efficiency Video Coding) standard. The rapid depth image frame internal mode type judgment method comprises the following steps: selecting a coding unit in a depth image; performing intra-frame predication mode judgment of a traditional HEVC standard and carrying out gross prediction; judging whether an optimal mode of the coding unit CU is a Planar mode or a DC mode; performing rapid DMM1 search in a 3D-HEVC coder to obtain a judgment formula; after judging the DMM1 search according to the judgment formula, performing DMM4 search in the 3D-HEVC coder and calculating a minimum rate distortion cost; and judging an optimal intra-frame predication mode and processing the next coding unit in the depth image. The current depth image intra-frame predication mode is primarily judged by utilizing the characteristics of the depth image, and an intra-frame mode, which does not usually occur in a coding process of certain depth images, is jumped; and the rapid depth image frame internal mode type judgment method has the prominent advantages that the calculation amount is small, the coding complexity is low, the coding time is short, and the compression performance is consistent to that of original 3D-HEVC and the like.

Description

technical field [0001] The present invention relates to the technical field of video coding, and relates to the intra-frame mode judgment of a depth map, and in particular to a fast depth-map intra-frame mode judgment method for the 3D-HEVC coding standard. Background technique [0002] With the rapid development of computer vision technology and multimedia technology, efficient 3D video display technology has become a current research hotspot. Multi-view texture videos plus depthmaps (MVD) format is not only the latest 3D video coding format, but also one of the most effective 3D video coding methods. On the decoding side, the MVD format can use depth image based rendering (DIBR) technology to encode texture video streams of a few viewpoints and their corresponding depth image streams, and synthesize texture videos of more viewpoints. 3D content can then be displayed on an autostereoscopic display. Recently, the 3D Video Joint Team (Joint Collaborative Team on 3DVideo Cod...

AI Technical Summary

Problems solved by technology

However, due to the high computational complexity and low encoding quality of DMM2, DMM3 and RBC modes, the prediction modes of these three depth maps were removed in the later 3D-HEVC reference software

Obviously, the original 3D-HEVC depth map intra-frame judgment method has a huge amount of calculation, high computational complexity, and consumes a lot of encoding time, which will affect the actual application of the 3D-HEVC encoder.

Images