Method and device for precision tuning, and method and device for matching vestigial sideband signal in television
US6396550B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 5, 1999 |
| Grant date | May 28, 2002 |
| Priority date | — |
| Expiry date | Nov 5, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N21/4263
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The present invention pertains to a method and device for precision tuning and a method and device for matching a vestigial sideband signal in a television, which prevent a direct current boost-up when a vestigial sideband signal is shifted to a base band in a carrier recovery device of a short loop using a digital frequency and phase locked loop. A precision tuning method in a television includes the steps of receiving a plurality of vestigial sideband signals in a radio frequency band, shifting only a vestigial sideband signal of an intended channel to be tuned among the plurality of vestigial sideband signals to a base band, outputting the baseband-shifted vestigial sideband signal, generating a direct current estimated value by taking an average of the baseband-shifted vestigial sideband signal, and controlling a tuning frequency of a tuner based on the direct current estimated value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.