Video modulator arrangement
US5982446A · kind A · utility
1Cited by
14References
18Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 15, 1996 |
| Grant date | Nov 9, 1999 |
| Priority date | — |
| Expiry date | Oct 15, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B14/08
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In a single-chip multistandard video modulator arrangement in which audio signals for transmission with video signals are first modulated onto a subcarrier and then combined with the video signals for modulation onto a VHF or UHF main carrier, the modulated subcarrier signals are passed through a high-pass filter before being combined with the video signals in order to reduce the amplitude of any audio frequency components, and the resulting variations in main carrier amplitude, which tend to produce "sound in vision" effects.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.