Line number having circuit for a sampled interlaced television signal
US4766494A · kind A · utility
8Cited by
4References
2Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 2, 1987 |
| Grant date | Aug 23, 1988 |
| Priority date | — |
| Expiry date | Oct 2, 2007 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N7/122
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In a line number halving circuit for a sampled interlaced television signal in one field the signal samples of a line (0, 4, 8) cancelled during halving are placed between the signal samples of an underlying or overlying maintained line (2, 6, 10) while in the other field alternately a signal sample of the overlying line (1, 5, 9) and of the underlying cancelled line (5, 9, 13) is placed between the successive signal samples of a maintained line (3, 7, 11) in order to prevent position errors in a picture displayed with the television signal halved in line number.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.