Title :
Synthesis filter bank with low memory requirements for image subband coding
Author :
Sundsbo, I. ; Ramstad, Tor A.
Author_Institution :
Nordic VLSI ASA, Tiller, Norway
fDate :
31 May-3 Jun 1998
Abstract :
One of the factors that makes subband coding seem less attractive for image processing compared to transform coding, is the extensive memory requirements for 2-D filtering. In this paper we present a filtering method that significantly lowers the memory requirements. A parallel, uniform and separable filter bank with 8 channels in each dimension is considered. It is shown that by a data reordering and a minor structural change to the filter bank, a blockwise filtering is made possible, thus reducing the total memory to 192 B registers and 9 KB RAM for an image of size 1152×1920 pixels
Keywords :
delays; filtering theory; image coding; 1152 pixel; 1920 pixel; 2211840 pixel; 2D filtering; 9 KB; blockwise filtering; data reordering; image subband coding; memory requirements; structural change; synthesis filter bank; Channel bank filters; Filter bank; Filtering; Image coding; Image processing; Pixel; Random access memory; Read-write memory; Registers; Transform coding;
Conference_Titel :
Circuits and Systems, 1998. ISCAS '98. Proceedings of the 1998 IEEE International Symposium on
Conference_Location :
Monterey, CA
Print_ISBN :
0-7803-4455-3
DOI :
10.1109/ISCAS.1998.694532
