Heegard-Berger video coding using LMMSE estimator

Authors:
Xiaopeng Fan;Oscar Au;Yan Chen;Jiantao Zhou
Affiliations:
Department of ECE, Hong Kong University of Science and Technology, Kowloon, HK SAR, China;Department of ECE, Hong Kong University of Science and Technology, Kowloon, HK SAR, China;Department of ECE, Hong Kong University of Science and Technology, Kowloon, HK SAR, China;Department of ECE, Hong Kong University of Science and Technology, Kowloon, HK SAR, China
Venue:
PCM'06 Proceedings of the 7th Pacific Rim conference on Advances in Multimedia Information Processing
Year:
2006

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Abstract

In this paper a novel distributed video coding scheme was proposed based on Heegard-Berger coding theorem, rather than Wyner-Ziv theorem. The main advantage of HB coding is that the decoder can still decode and output a coarse reconstruction, even if side information degrade or absent. And if side information present or upgrade at decoder, a better reconstruction can be achieved. This robust feature can solve the problem lies in Wyner-Ziv video coding that the encoder can hardly decide the bit rate because rate-distortion was affected by the side information known only at the decoder. This feature also leaded to our HB video coding scheme with 2 decoding level of which we first reconstruct a coarse reconstruction frame without side information, and do motion search in previous reconstructed frame to find side information, then reconstruct a fine reconstruction frame through HB decoding again, with side information available.