Bit-stream allocation methods for wavelet based scalable video coding

Authors:
Toni Zgaljic;Nikola Sprljan;Ebroul Izquierdo
Affiliations:
University of London, London, UK;University of London, London, UK;University of London, London, UK
Venue:
MobiMedia '06 Proceedings of the 2nd international conference on Mobile multimedia communications
Year:
2006

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Abstract

In wavelet based scalable video coding quality scalability is achieved using bit-plane coding techniques that result in embedded bit-stream. In order to minimise distortion when specific bit-rate is targeted, compressed data has to be optimally truncated in different layers that comprise the bit-stream. In this paper two methods for compressed bit-stream allocation are presented. First adopts assumption that same fractional bit-planes within same bit-planes of different wavelet subbands have nearly equal rate-distortion slopes, while the other takes into account the distortion caused by the quantisation of wavelet coefficients. First method is characterised by low complexity since distortion does not have to be assessed. For the second method, a simple yet effective statistical distortion model is derived. The experimental results show comparable performance of the two tested methods.