Title :
Development of integer cosine transforms by the principle of dyadic symmetry
Author_Institution :
Dept. of Electron., Chinese Univ. of Hong Kong, Shatin, Hong Kong
fDate :
8/1/1989 12:00:00 AM
Abstract :
Shows how to convert the order-8 cosine transforms into a family of integer cosine transforms (ICTs) using the theory of dyadic symmetry. The new transforms can be implemented using simple integer arithmetic. It was found that performance close to that of the DCT can be achieved with an ICT that requires only 4 bits for representation of its kernel component magnitude. Better performance can be achieved by some ICTs whose kernel components require longer bit lengths for representation. ICTs that require 3 bits or less for representation of their component magnitude are available but with degraded performance. The availability of many ICTs provides an engineer the freedom to tradeoff performance for simple implementation in designing a transform codec.
Keywords :
data compression; encoding; picture processing; transforms; DCT; data compression; dyadic symmetry; integer arithmetic; integer cosine transforms; kernel component magnitude; performance; picture processing; transform codec; transform coding;
Journal_Title :
Communications, Speech and Vision, IEE Proceedings I