Influence of downsampling filter characteristics on compression performance in wavelet-based scalable video coding

被引：4

作者：

Mrak, M. ^{[1
]}

Zgaljic, T. ^{[1
]}

Izquierdo, E. ^{[1
]}

机构：

[1] Univ London, Dept Elect Engn, London E1 4NS, England

来源：

IET IMAGE PROCESSING | 2008年 / 2卷 / 03期

关键词：

D O I：

10.1049/iet-ipr:20070185

中图分类号：

TP18 [人工智能理论];

学科分类号：

081104 ; 0812 ; 0835 ; 1405 ;

摘要：

The application of different downsampling filters in video coding directly models visual information at lower resolutions and influences the compression performance of a chosen coding system. In wavelet-based scalable video coding the spatial scalability is achieved by the application of wavelets as downsampling filters. However, characteristics of different wavelets influence the performance at targeting spatio-temporal decoding points. An analysis of different downsampling filters in popular wavelet-based scalable video coding schemes is presented. Evaluation is performed for both intra- and inter-coding schemes using wavelets and standard downsampling strategies. On the basis of the obtained results a new concept of inter-resolution prediction is proposed, which maximises the average performance using a combination of standard downsampling filters and wavelet-based coding.

引用

页码：116 / 129

页数：14

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