Letter box line blackener for the HDTV/conventional-analog hybrid system
US7079192B1 · kind B1 · utility
5Cited by
7References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 30, 2002 |
| Grant date | Jul 18, 2006 |
| Priority date | — |
| Expiry date | Jul 29, 2024 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S348/913
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A blackener for letter box lines associated with a HDTV/conventional-analog hybrid television transmission where the blackener counts horizontal sync pulses contained in the HDTV/conventional-analog hybrid television transmission and determines when the HDTV/conventional-analog hybrid television transmission is in letter-box lines: if it is, then the blackener sends substitute black signal to an output; and if it is not, then the blackener sends the HDTV/conventional-analog hybrid television transmission to the output.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.