Research For Distributed Video Code And Decode

Distributed source coding is a new paradigm for source compression, based on Slepian-Wolfs and Wyner-Ziv's information-theoretic results from the 1970s. the practical algorithm for distributed source coding is proposed in this century.Leveraging the features of distributed source coding, researchers do a lot of research on distributed video coding, and design a series of distributed video coding systems that represent a fundamental paradigm shift from the conventional video coding methods. The conventional video coding comprises of a computationally intensive encoder and a lightweight decoder. But distributed video coding shifts the computational burden from the encoder to the decoder without compromising the theoretical compression performance and offers the feature of naturally robustness against transmission errors. Currently, the rate-distortion performance of pratical distributed video coding system is superior to conventional intraframe coding, but there is still a gap relative to conventional motion-compensated interframe coding.Distributed video coding is well-matched to applications involving wireless multimedia transmission (such as 802.11 or cellular or video sensor networks) which are characterized by the requirements of (1) computational power efficiency at mobile terminals due to battery life considerations; (2) high compression efficiency due to scarcity of wireless bandwidth; and (3) robustness to channel toss due to wireless medium.This thesis presents the fundamental concept and theory of distributed source coding, analysis the conventional hybrid video encode and decode, explores the distributed video code in the basic principle, achievement and application, reference of the existing research give the author's development design. Include:1.This thesis presents the fundamental concept and theory of distributed source coding, and gives out the analysis of distributed source coding.2. Analysis the achievement of distributed video code based on Turbo code and LDPC code.3. Analyze the distributed code applied on distributed video code system and the current main stream method.4. Designs a distributed video coding system and look into the design principal and performance of each module of this system, simultaneity analysize the emulate result..