分布式多视点视频编码的边信息生成方法研究-信号与信息处理专业论文.docxVIP

II II Abstract The encoding complexity of conventional video coding technologies is much higher than decoding complexity, because correlations are generally exploited at the encoder side. While Distributed Video Coding (DVC) is a new concept, at the encoder side several sources with the same distribution are encoded independently but at the decoded side they are decoded jointly. DVC applies to the occasions which need low power consumption, low encoder complexity and strong error resilience. Thus, in wireless video terminator such as wireless video monitoring system and video sensor network DVC is widely used. Side information plays an important role in DVC. Distributed Multi-view Video Coding (DMVC) can use not only temporal side information, but also inter-view side information. Therefore, the paper studies the generation method of side information in DMVC and proposes improved methods. Specific work includes the following aspects: The paper first does the research about temporal side information of DVC. By comparing with several traditional temporal side information prediction methods, A new temporal side information algorithm is proposed based on adaptive weighed and optimized motion estimation interpolation method. This method combines adaptive weighted frame interpolation and adaptive search window algorithm. It calculates the time correlation between WZ frame and adjacent key frame. Then different weights are used for frame interpolation according to disparate correlation in decoding end. The method can achieve more precise side information by adjusting search range of motion estimation. The proposed method has good performance in both subjective and objective quality. Secondly, the generation method of inter-view side information is studied in detail. By comparing with several typical inter-view side information generation method, the paper researches trifocal tensor based on simulated annealing algorithm to generate inter-view side information. The method i