Two port network with shared elements for combining and filtering luma and chroma components to form composite video signal
US5296921A · kind A · utility
2Cited by
5References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 16, 1992 |
| Grant date | Mar 22, 1994 |
| Priority date | — |
| Expiry date | Sep 16, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/45
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A network combines luminance and chrominance signals to provide a composite video signal wherein the chrominance signal is subjected to band pass filtering to reject low frequency noise and the luminance signal is subjected to filtering by a predetermined amount at the color subcarrier frequency to reject color dots. In a preferred implementation, the filter is realized with only one inductor and one capacitor thereby preventing displayed artifacts with the economic and reliability benefits of minimal parts count.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.