System for transparent transmission and reception of a secondary data signal with a video signal in the video band
US5557333A · kind A · utility
175Cited by
78References
45Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 24, 1994 |
| Grant date | Sep 17, 1996 |
| Priority date | — |
| Expiry date | Feb 24, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/445
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Signal processors for permitting the transparent, simultaneous transmission and reception of a secondary data signal with a video signal in the video band is disclosed. The signal processor in the transmitter rasterizes the data at the horizontal scanning rate and modulates the data with a data carrier at a non-integral multiple of the horizontal scanning rate to obtain frequency interleaving. The data is transmitted during the active video portion of each video line.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.