Title :
Sub-band coding of images
Author :
Woods, John W. ; O´Neil, Sean D.
Author_Institution :
Rensselaer Polytechnic Institute, Troy, NY
Abstract :
This paper presents an extension of sub-band coding to two-dimensions with particular application to images. We employ a 16 band decomposition using a tree structure of separable quadrature mirror filters and decimators. The sub-bands are encoded using DPCM with bits allocated to approximately minimize the mean-square error. A block-adaptive variant is also presented. A limited SNR comparison shows adaptive sub-band coding to outperform the adaptive discrete cosine transform and two types of vector quantizers.
Keywords :
Band pass filters; Bandwidth; Discrete cosine transforms; Finite impulse response filter; Frequency; Image coding; Phase change materials; Speech coding; Systems engineering and theory; Tree data structures;
Conference_Titel :
Acoustics, Speech, and Signal Processing, IEEE International Conference on ICASSP '86.
DOI :
10.1109/ICASSP.1986.1168863
