Hardware reduction by truncation of selected number of most significant bits for digital video system using subsampling and adaptive reconstruction
US4340940A · kind A · utility
9Cited by
2References
8Claims
0Family size
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Key dates
| Filing date | Aug 26, 1980 |
| Grant date | Jul 20, 1982 |
| Priority date | — |
| Expiry date | Aug 26, 2000 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/59
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In order to reduce the amount of hardware required in comparing 8-bit numbers representing digitized video signals, only the four LSB are compared, since if the numbers differ by more than the four LSB, no comparison is desired. This is done by detecting if any of the four MSB are logic "1", and if so, setting all of the four LSB to logic "1".
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.