Filter by-pass for transmitting an additional signal with a video signal
US5617148A · kind A · utility
122Cited by
67References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 31, 1995 |
| Grant date | Apr 1, 1997 |
| Priority date | — |
| Expiry date | Mar 31, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/445
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A controlled element for spectrum attenuation or a controlled filter is disclosed that is used to aid in the insertion of a secondary signal into a video signal without distorting the blanking intervals or close captioned data contained in the blanking interval of the video signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.