Upconverter for a television signal headend distribution center handling analog and digital signals and method of making and using the same
US6567132B1 · kind B1 · utility
4Cited by
15References
28Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 10, 1999 |
| Grant date | May 20, 2003 |
| Priority date | — |
| Expiry date | Mar 10, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N21/426
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An upconverter for converting IF television signals to VHF or UHF signals prior to broadcast is configured to process either analog or digital television signals. The upconverter identifies the type of incoming television signal and generates an appropriate reference signal depending on whether the incoming television signal is digital or analog. In an analog format, the reference signal is used by the modulator generating the IF signal to synchronize phase with the signals output by various other upconverters. In a digital format, the reference signal is used, for example, as a test signal for the upconversion circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.