Digital television broadcast signal receiver
US7509666B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 24, 2005 |
| Grant date | Mar 24, 2009 |
| Priority date | — |
| Expiry date | Sep 18, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N21/42638
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A TV broadcast receiver measures, at least two times, a signal intensity in a maximum receiving direction and a signal intensity in the 180 degree opposite receiving direction among 16 receiving directions of a smart antenna. If the signal intensity in the maximum receiving direction is significantly different from that in the opposite receiving direction, it determines that the smart antenna is connected. If the signal intensity in the maximum receiving direction is substantially the same as that in the opposite receiving direction, it determines that the smart antenna is disconnected. It displays messages of the connection and disconnection of the smart antenna on a monitor.This makes it possible to quickly determine whether the antenna connected to the TV broadcast receiver is a smart antenna or a stationary unidirectional antenna.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.