OPTIMAL RATE ADAPTATION IN THE SCALABLE EXTENSION OF H.264/AVC WITH COMBINED SCALABILITY

摘要

Adaptation for scalable video coding is one of the recentrnchallenges in video distribution over modern networks,rnwhich are heterogeneous both in terms of availablernbandwidth and user end terminal capability. In case ofrnSNR/spatial combined scalability an interesting issue concernsrnhow to remove data from different spatial resolutionsrnfor the adaptation to different rates. Scalable Video Codingrnoffers the possibility to adapt the content following thern“quality layer” abstraction. In this work we present a newrnmethod to optimally define quality layers for a scalable bitstreamrnin a combined scalability scenario using Integer LinearrnProgramming and distortion models. The performancesrnof the proposed approach are comparable with the state-ofthe-rnart methods, but they are obtained with a significant complexityrnreduction and augmented flexibility.