DCT/DST alternate-transform image coding

Author

Rose, Kenneth ; Heiman, Arie ; Dinstein, Its´Hak

Author_Institution

Dept. of Electr. Eng., California Inst. of Technol., Pasadena, CA, USA

Volume

38

Issue

1

fYear

1990

fDate

1/1/1990 12:00:00 AM

Firstpage

94

Lastpage

101

Abstract

An 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 block 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. Simulation results are shown and compared with the performance of related previous methods, namely adaptive DCT and fast Karhunen-Loeve transform (FKLT)

Keywords

data compression; encoding; picture processing; transforms; DCT; DST; block classification technique; discrete cosine transform; discrete sine transform; fast Karhunen-Loeve transform; first-order Gauss-Markov model; image coding; nonstationary real images; Bit rate; Discrete cosine transforms; Discrete transforms; Gaussian processes; Image coding; Karhunen-Loeve transforms; Mathematical analysis; Mathematical model; Redundancy; Transform coding;

fLanguage

English

Journal_Title

Communications, IEEE Transactions on

Publisher

ieee

ISSN

0090-6778

Type

jour

DOI

10.1109/26.46533

Filename

46533