TY - JOUR

T1 - A novel variable-rate classified vector quantizer design algorithm for image coding

AU - Hwang, Wen Jyi

PY - 1998

Y1 - 1998

N2 - This paper presents a novel classified vector quantizer (CVQ) design algorithm which can control the rate and storage size for applications of image coding. In the algorithm, the classification of image blocks is based on the edge orientation of each block in the wavelet domain. The algorithm allocates the rate and storage size available to each class of the CVQ optimally so that the average distortion is minimized. To reduce the arithmetic complexity of the CVQ, we employ a partial distance codeword search algorithm in the wavelet domain. Simulation results show that the CVQ enjoys low average distortion, low encoding complexity, high visual perception quality, and is well-suited for very low bit rate image coding.

AB - This paper presents a novel classified vector quantizer (CVQ) design algorithm which can control the rate and storage size for applications of image coding. In the algorithm, the classification of image blocks is based on the edge orientation of each block in the wavelet domain. The algorithm allocates the rate and storage size available to each class of the CVQ optimally so that the average distortion is minimized. To reduce the arithmetic complexity of the CVQ, we employ a partial distance codeword search algorithm in the wavelet domain. Simulation results show that the CVQ enjoys low average distortion, low encoding complexity, high visual perception quality, and is well-suited for very low bit rate image coding.

KW - Fast codeword search

KW - Vector quantization

KW - Wavelet transform

UR - http://www.scopus.com/inward/record.url?scp=0032118549&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0032118549&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:0032118549

VL - E81-A

SP - 1498

EP - 1506

JO - IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences

JF - IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences

SN - 0916-8508

IS - 7

ER -