Title :
Subband finite state scalar quantization
Author :
Naveen, T. ; Woods, John W.
Author_Institution :
ECSE Dept., Rensselaer Polytech. Inst., Troy, NY, USA
Abstract :
A novel image coding algorithm that exploits the relationship between various subbands of an image is presented. This algorithm has been simulated on the monochrome ´Lena´ image and an MIT high-definition (HD) video. Uniform-threshold quantizers (UTQs) and differential pulse code modulation (DPCM) are used in the implementation of the algorithm. Using local variance for classification, a 15% reduction in quantization noise has been achieved compared with other published techniques for ´Lena´ at an average bit rate of 1.0 bit/pixel. For the MIT HD video, this reduction was 29.1%.<>
Keywords :
high definition television; image coding; pulse-code modulation; variational techniques; HD video; differential pulse code modulation; image coding algorithm; local variance; quantization noise; uniform-threshold quantizers;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 1993. ICASSP-93., 1993 IEEE International Conference on
Conference_Location :
Minneapolis, MN, USA
Print_ISBN :
0-7803-7402-9
DOI :
10.1109/ICASSP.1993.319886
