New variable-rate VQ coding scheme apply in HDTV

Yushu Feng; Ker Zhang

doi:10.1117/12.24271

1 September 1990 New variable-rate VQ coding scheme apply in HDTV

Yushu Feng, Ker Zhang

Proceedings Volume 1360, Visual Communications and Image Processing '90: Fifth in a Series; (1990) https://doi.org/10.1117/12.24271
Event: Visual Communications and Image Processing '90, 1990, Lausanne, Switzerland

Abstract

In this paper, a new approach of a variable block size VQ coding scheme is proposed. Most natural image can be divided into regions of high and low detail. Traditional coding schemes do not adapt the blocksize on the space-varying characteristics of natural images, but break the image into blocks of a fixed size prior to processing. The blocksize in transform coding is usually too large to handle partial high-detail region satisfactorily. On the other hand, the block size in conventional vector quantizer is too small to take advantage of large homogeneous regions in an image. For this reason, it can be very attractive to implement a variable block size image coding scheme which allow a greater variation of the number of bits spent per unit area according to the local detail.

Citation Download Citation

Yushu Feng and Ker Zhang "New variable-rate VQ coding scheme apply in HDTV", Proc. SPIE 1360, Visual Communications and Image Processing '90: Fifth in a Series, (1 September 1990); https://doi.org/10.1117/12.24271

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