Abstract
Distributed video codec (DVC) has been developed to construct a simple encoder that utilizes information theory for distributed sources in the circumstance of mobile multimedia communication. In the DVC codec, an efficient algorithm to generate side information (SI) is one of the most important techniques to improve the coding performance. We propose a scheme to increase the quality of SI frame, where the proposed scheme consists of three steps. In the first step, SI frame is constructed by motion estimation and motion compensation in the DVC decoder. Then, in the second step, the blocks in the temporary SI frame are classified into reli- able or unreliable ones. The unreliable blocks are updated by block boun- dary matching algorithm in the third step. Simulation results show that the proposed algorithm outperforms the conventional methods significantly. In addition, the proposed scheme can be combined with the conventional schemes generating SI frame to increase the coding performance of the DVC codec. © The Authors. Published by SPIE under a Creative Commons Attribution 3.0 Unported License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI. (DOI: 10.1117/1.OE.52 .10.103111)
Highlights
In the last few years, a variety of mobile multimedia devices have been developed and become popular
Among the tools to increase the performance of the Distributed video codec (DVC) codec, an efficient scheme to generate the side information (SI) frame is one of the most important techniques because it dominantly affects the quality of the picture in the DVC decoder and the encoding rate
The gain of the proposed scheme is represented by Bjøntegaard delta (BD) rate reduction.[19]
Summary
In the last few years, a variety of mobile multimedia devices have been developed and become popular. The model of UC Berkeley is named power-efficient robust, high-compression, syndrome-based multimedia (PRISM) coding.[5] In Ref. 6, a project, which is called distributed coding for video services (DISCOVER), had been performed to construct the lowpower video codec based on Slepian–Wolf and Wyner–Ziv theorems. Among the tools to increase the performance of the DVC codec, an efficient scheme to generate the SI frame is one of the most important techniques because it dominantly affects the quality of the picture in the DVC decoder and the encoding rate.
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