Parallel iteration-based grading and distributed video coding/decoding method and system

Abstract

The invention provides a parallel iteration-based grading and distributed video coding / decoding method and a system. The method comprises the steps as following: an original video frame is divided into a basic layer video sequence and a multi-layer strengthening layer video sequence; an H.264 coder is adopted to code the basic layer video sequence; a residual error prediction-based parallel PDWZ coder is adopted to code the strengthening layer video sequence; for the coded basic layer video sequence, an H.264 decoder is adopted to generate a low-quality low-resolution rate video sequence; for the decoded strengthening layer video sequence, a WZ decoder with iteration structure is adopted to generate a high-quality video sequence with a high resolution rate; and the multi-layer strengthening layer video sequence executes individual quantification and signal channel coding in the parallel PDWZ coder, and individual bit streams are respectively generated. The method provided by the embodiment of the invention improves the coding efficiency of the whole system and lowers dependency of the system compressing rate on GOP. The invention further provides a parallel iteration-based grading and distributed video coding / decoding system.

Description

technical field [0001] The present invention relates to the technical field of video encoding and decoding, in particular to a parallel iteration-based hierarchical distributed video encoding and decoding method and system. Background technique [0002] Image compression technology is widely used in high-definition digital TV, video surveillance and other occasions, and video codec technology provides strong support for image and video compression. The traditional video coding standards mainly include H.261 and H.263 of ITU, M-JPEG of the Moving Picture Experts Group and the MPEG series standards of the International Organization for Standardization Moving Picture Experts Group. There are RealVideo from Real-Networks, WMV from Microsoft, and QuickTime from Apple. With the continuous improvement of the requirements of encoding technology, the encoding equipment is required to be simple, low power consumption, and low complexity, so that the decoding end has more resources an...

AI Technical Summary

Problems solved by technology

[0006] However, the side information interpolation generation algorithm proposed by Ascenso is an interpolation structure, which requires non-sequential decoding, and at the same time limits the value of GOP, because a large GOP will lead to system performance degradation and relatively large decoding delay

The GOP value of the Yaacoub method is also limited by keyframe dependencies

The system proposed by Q.Xu and Tagliasacchi mainly focuses on the scalability of the system, or the robustness to bit errors, and does not discuss the improvement of coding efficiency.

Images