Television signal receiving apparatus
US5239379A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 20, 1992 |
| Grant date | Aug 24, 1993 |
| Priority date | — |
| Expiry date | Jul 20, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N11/26
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A television signal receiving apparatus receives a new standard television broadcasting signal in an environment in which conventional standard television broadcasting signals are present. A first tuner coupled to a first antenna extracts a first television signal which contains a new standard television signal and a conventional standard television signal of the specific channel at a first ratio, and a second tuner coupled to a second antenna extracts a second television signal which contains the new standard television signal and the conventional standard television signal of the specific channel at a second ratio. In an operation unit, a multiplier multiples the second television signal by a predetermined coefficient, and a subtracter subtracts an output signal of the multiplier from the first television signal. An output signal of the subtracter becomes the new standard television signal when the coefficient has a specific value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.