Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.21/1336
Título: Advanced side information creation techniques and framework for Wyner-Ziv video coding
Autor: Ascenso, João
Pereira, Fernando
Palavras-chave: Wyner-Ziv video coding
Distributed video coding
Side information creation
Frame interpolation
Motion estimation
Data: Dez-2008
Editora: Academic Press INC Elsevier Science
Citação: Ascenso J, Pereira F. Advanced side information creation techniques and framework for Wyner-Ziv video coding.Journal of Visual Communication and Image Representation. 2008; 19 (8): 600-613.
Relatório da Série N.º: 8;
Resumo: Recently, several distributed video coding (DVC) solutions based on the distributed source coding (DSC) paradigm have appeared in the literature. Wyner-Ziv (WZ) video coding, a particular case of DVC where side information is made available at the decoder, enable to achieve a flexible distribution of the computational complexity between the encoder and decoder, promising to fulfill novel requirements from applications such as video surveillance, sensor networks and mobile camera phones. The quality of the side information at the decoder has a critical role in determining the WZ video coding rate-distortion (RD) performance, notably to raise it to a level as close as possible to the RD performance of standard predictive video coding schemes. Towards this target, efficient motion search algorithms for powerful frame interpolation are much needed at the decoder. In this paper, the RD performance of a Wyner-Ziv video codec is improved by using novel, advanced motion compensated frame interpolation techniques to generate the side information. The development of these type of side information estimators is a difficult problem in WZ video coding, especially because the decoder only has available some reference, decoded frames. Based on the regularization of the motion field, novel side information creation techniques are proposed in this paper along with a new frame interpolation framework able to generate higher quality side information at the decoder. To illustrate the RD performance improvements, this novel side information creation framework has been integrated in a transform domain turbo coding based Wyner-Ziv video codec. Experimental results show that the novel side information creation solution leads to better RD performance than available state-of-the-art side information estimators, with improvements up to 2 dB: moreover, it allows outperforming H.264/AVC Intra by up to 3 dB with a lower encoding complexity.
Peer review: yes
URI: http://hdl.handle.net/10400.21/1336
ISSN: 1047-3203
Aparece nas colecções:ISEL - Eng. Elect. Tel. Comp. - Artigos

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