Towards a theory for video coding using distributed compression principles
Prakash Ishwar
Prabhakaran, V.M.
Kannan Ramchandran
Dept. of Electr. Eng. & Comput. Sci., California Univ., Berkeley, CA, USA;
This paper appears in: Image Processing, 2003. ICIP 2003. Proceedings. 2003 International Conference on
Publication Date: 14-17 Sept. 2003
Volume: 2,
On page(s): II- 687-90 vol.3
ISSN: 1522-4880
ISBN: 0-7803-7750-8
INSPEC Accession Number: 7978638
Digital Object Identifier: 10.1109/ICIP.2003.1246773
Current Version Published: 2003-11-24
Abstract
This paper presents an information-theoretic study of video codecs that are based on the principle of source coding with side information at the decoder. In contrast to the classical Wyner-Ziv side-information source coding problem (1976), in this work we address the situation where the source and side-information are connected through a state of nature that is unknown to both the encoder and the decoder. We dub this framework as source encoding with side-information under ambiguous state of nature (SEASON). Our objective is to compare the achievable rate-distortion (R/D) performance of conventional video codecs designed under the motion-compensated predictive coding (MCPC) framework and video codecs designed under the SEASON framework. Our analysis shows that under appropriate motion models and for Gaussian displaced frame difference (DFD) statistics, the R/D performance of a classical MCPC-based video codec is matched by that of our proposed SEASON-based video codec, with the hitter being characterized by the novel concept of moving the motion compensation task from the encoder to the decoder.
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