A new image coding method for low bit rates is proposed. It is based on alternate use of the discrete cosine transform (DCT) and the discrete sine transform (DST) on image blocks. This procedure achieves the removal of redundancies in the correlation between neighboring blocks, as well as the preservation of continuity across the Mock boundaries. An outline of the mathematical justification of the method assuming a certain first-order Gauss-Markov model is given. The resulting coding method is then adapted to nonstationary real images by locally adapting the model parameters and improving the block classification technique. Finally, simulation results are shown and compared with the performance of related previous methods, namely, adaptive-DCT  and fast Karhnnen-Loeve transform (FKLT) .
|Number of pages||8|
|Journal||IEEE Transactions on Communications|
|State||Published - 1 Jan 1990|
ASJC Scopus subject areas
- Electrical and Electronic Engineering