ACCURACY-SCALABLE MOTION CODING FOR EFFICIENT SCALABLE VIDEO COMPRESSION (TA-L5)

Author(s) : Guillaume Boisson (Thomson R&D, France) Edouard Francois (Thomson R&D, France) Christine Guillemot (IRISA, France)

Abstract : For a scalable video coder to remain efficient over a wide range of bit-rates, covering e.g. mobile video streaming applications and TV broadcasting, it is essential that motion information presents some form of scalability. In this paper we propose a new wavelet-based spatio-SNR-temporal-scalable video codec coupled with an accuracy-scalable motion codec. It allows to decode a reduced amount of motion information at sub-resolutions, taking advantage that motion compensation requires less and less accuracy at lower spatial resolutions. This new motion codec proves its efficiency in our full-scalable framework, by improving significantly video quality at sub-resolutions without inducing any noticeable penalty at high bit-rates.

Menu