Image storage using separately scanned wideband and narrowband variables
US4736239A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 2, 1987 |
| Grant date | Apr 5, 1988 |
| Priority date | — |
| Expiry date | Mar 2, 2007 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/87
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Computer main memory is used for storing relatively densely sampled wideband video information concerning a television display and for storing relatively sparsely sampled narrowband video information concerning the same television display. The relatively densely sampled wideband video information is read out in substantially real time from computer main memory during line trace intervals in the television display. The relatively sparsely sampled narrowband video information is read out of computer main memory in advanced and compressed time during selected line retrace intervals in the television display. The wideband video information may be luminance information; and the narrowband video information chrominance information.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.