Title :
Perceptually weighted vector quantisation in the DCT domain
Author :
Macq, B. ; Shi, H.Q.
Author_Institution :
Catholique Univ. de Louvain, Belgium
fDate :
7/22/1993 12:00:00 AM
Abstract :
A new vector quantisation scheme based on a perceptually weighted signal-to-noise ratio (WSNR) is proposed. The authors show that the application of the LBG procedure in the DCT domain using the WSNR as the function to be optimised leads to substantial improvement in the perceptual quality of the decoded images, compared to the LBG procedure in the pixel domain.
Keywords :
discrete cosine transforms; image coding; vector quantisation; DCT domain; LBG procedure; decoded images; perceptually weighted SNR; signal-to-noise ratio; vector quantisation scheme;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19930926
