Sampling analog video signal for secondary images
US5838385A · kind A · utility
21Cited by
12References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 30, 1996 |
| Grant date | Nov 17, 1998 |
| Priority date | — |
| Expiry date | Aug 30, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/641
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A data converter (13) for providing data for secondary images in a video display system (10). One embodiment (FIG. 2) provides data for a staggered pixel array, by using an A/D converter (23) to sample the data at a rate of 2/n(h) times the sample rate of the main image, where 1/n(h) is the horizontal scaling factor. A multiplexer (24) selects between two different sample patterns. Another embodiment (FIG. 3) provides data for progressively scanned secondary images by selecting 2/n(v) times the number of lines per input field, where 1/n(v) is the vertical scaling factor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.