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Content Adaptive Wyner-ZIV Video Coding Driven by Motion Activity

9 years 8 months ago
Content Adaptive Wyner-ZIV Video Coding Driven by Motion Activity
In distributed video coding (DVC), the video statistics are exploited, partially or totally at the decoder. A particular case of DVC, WynerZiv video coding deals with lossy source coding with side information at the decoder and allows moving part or the entire motion estimation task to the decoder. In this context, it is the decoder responsibility to obtain the side information, a guess of the encoded Wyner-Ziv frame and the encoder only sends parity bits to improve its quality. In this paper, a technique targeting the improvement of the quality of the side information, and thus of the rate-distortion performance of the Wyner-Ziv codec is proposed. This is achieved by adaptively adjusting the size of the motion interpolation structure (or GOP length) according to the motion activity along the sequence. Experimentally, this allows to achieve gains up to 0.8 dB without performing any motion estimation or complex mode decision at the encoder.
João Ascenso, Catarina Brites, Fernando Per
Added 22 Oct 2009
Updated 22 Oct 2009
Type Conference
Year 2006
Where ICIP
Authors João Ascenso, Catarina Brites, Fernando Pereira
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