Prediction method for discrete cosine transform coefficients

Details Prediction method for discrete cosine transform coefficients Prediction method for discrete cosine transform coefficients

1997-09-19

1999-09-28

Tung, Bryan

Television

Bandwidth reduction system

Data rate reduction

348405, 348410, 348421, H04N 712, H04N 1102, H04N 1104

Patent

active

059596740

ABSTRACT:
A method for prediction a discrete cosine transform (DCT) coefficient is provided. In the prediction method, DC coefficients of adjacent blocks are used. For selecting a DC coefficient to be used for the prediction, the maximum and the minimum among the DC coefficients of the adjacent blocks are selected, and then the maximum or minimum value which is closest to the current DC coefficient is used for the prediction value for the current block. Therefore, prediction performance for DC/AC coefficients can be improved in a DCT domain.

REFERENCES:
patent: 5543843 (1996-08-01), Kato et al.
patent: 5559557 (1996-09-01), Kato
patent: 5835149 (1998-11-01), Astle

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