VQ-adaptive block transform coding of images

被引：5

作者：

Caglar, H ^{[1
]}

Gunturk, S ^{[1
]}

Sankur, B ^{[1
]}

Anarim, E ^{[1
]}

机构：

[1] Bogazici Univ, Dept Elect & Elect Engn, TR-80815 Bebek, Turkey

来源：

IEEE TRANSACTIONS ON IMAGE PROCESSING | 1998年 / 7卷 / 01期

关键词：

coding gain; orthogonal block transform; permutation; reference vector; vector quantization;

D O I：

10.1109/83.650855

中图分类号：

TP18 [人工智能理论];

学科分类号：

081104 ; 0812 ; 0835 ; 1405 ;

摘要：

Two new design techniques for adaptive orthogonal block transforms based on vector quantization (VQ) codebooks are presented. Both techniques start from reference vectors that are adapted to the characteristics of the signal to be coded, while using different methods to create orthogonal bases, The resulting transforms represent a signal coding tool that stands between a pure VQ scheme on one extreme and signal-independent, fixed block transformation-like discrete cosine transform (DCT) on the other, The proposed technique has superior compaction performance as compared to DCT both in the rendition of details of the image and in the peak signal-to-noise ratio (PSNR) figures.

引用

页码：110 / 115

页数：6

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