Adaptive field/frame encoding of discrete cosine transform
US5737020A · kind A · utility
99Cited by
12References
1Claims
0Family size
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Key dates
| Filing date | Jan 7, 1997 |
| Grant date | Apr 7, 1998 |
| Priority date | — |
| Expiry date | Jan 7, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/61
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method of Discrete Cosine Transform compression of a digital video image. In the method the Field Variance and Frame Variance are calculated. When the Field Variance is less than the Frame Variance, Field Discrete Cosine Transform type compression is performed. Alternatively, when the Frame Variance is less than the Field Variance, then a Frame Discrete Cosine Transform compression is performed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.