Apparatus and method for combining digital and analog television signals
US6278498A · kind A · utility
12Cited by
11References
21Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 1, 1998 |
| Grant date | Aug 21, 2001 |
| Priority date | — |
| Expiry date | Apr 1, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/38
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An adjacent channel combiner combines an analog television channel with an upper adjacent digital television channel using practical filter designs. An aural signal of the analog television channel is combined after both a visual signal and a digital signal have been combined. A directional filter combines the visual and digital signals and a diplexer or other means is used for combining the aural signal with the combined visual and digital signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.