Title :
Hierarchical coding of super high definition images with subband+multistage VQ
Author :
Furukawa, Isao ; Nomura, Mitsuru ; Ono, Sadayasu
Author_Institution :
NTT Ttransmission Syst. Lab., Kanagawa, Japan
Abstract :
A subband based hierarchical coding algorithm is proposed and an examination is made of its coding performance for super high definition images. Several quadrature mirror filters are examined from the viewpoints of reconstruction accuracy, coding gain, and low pass characteristics. The two-stage vector quantization scheme is also introduced to control quantization accuracy in each subband. Hierarchical image reconstruction and efficient bit-rate compression can simultaneously be obtained by using the proposed algorithm
Keywords :
data compression; encoding; picture processing; VQ; bit-rate compression; coding gain; coding performance; hierarchical coding algorithm; hierarchical image reconstruction; low pass characteristics; quadrature mirror filters; quantization accuracy; reconstruction accuracy; subband coding; super high definition images; vector quantisation; Filters; HDTV; Image coding; Image reconstruction; Image resolution; Image storage; Mirrors; Pixel; Signal resolution; Vector quantization;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 1991. ICASSP-91., 1991 International Conference on
Conference_Location :
Toronto, Ont.
Print_ISBN :
0-7803-0003-3
DOI :
10.1109/ICASSP.1991.150943
