Title :
Wavelet coding of image using quadtree representation and block entropy coding
Author :
Zheng, Wenxing ; Nan, Hua
Author_Institution :
Lab. of TV Technol., Beijing Univ. of Posts & Telecommun., China
Abstract :
A new efficient image coding scheme, based on quadtree representation and block entropy coding (QRBEC), for encoding the wavelet transform coefficients of images is presented. The property of HVS is also incorporated into the quantization process. In addition, how to flexibly control the quantization level as well as output bitrate of the coder is also investigated. The coding efficiency of the coder is quite competitive with the well-known EZW coder, and requires less computation burden. The proposed coding scheme can also be applied in image sequence coding, resulting in satisfactory performance
Keywords :
data compression; entropy codes; image coding; image representation; image sequences; quadtrees; quantisation (signal); transform coding; variable length codes; wavelet transforms; block entropy coding; coding efficiency; image coding; image sequence; quadtree representation; quantization process; wavelet coding; wavelet transform coefficients; Electronic switching systems; Entropy coding; Filters; Frequency; Image coding; Laboratories; Quantization; TV; Wavelet coefficients; Wavelet transforms;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 1997. ICASSP-97., 1997 IEEE International Conference on
Conference_Location :
Munich
Print_ISBN :
0-8186-7919-0
DOI :
10.1109/ICASSP.1997.595348
