Prediction method for discrete cosine transform coefficients
US5959674A · kind A · utility
27Cited by
3References
2Claims
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Key dates
| Filing date | Sep 19, 1997 |
| Grant date | Sep 28, 1999 |
| Priority date | — |
| Expiry date | Sep 19, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/60
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.