Digital television broadcast signal receiver

Interactive video distribution systems – Video distribution system components – Receiver

Reexamination Certificate

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Details

C725S072000, C348S731000, C348S706000, C348S570000, C348S725000

Reexamination Certificate

active

07624420

ABSTRACT:
A digital television broadcast signal receiver connected to a multi-directional antenna carries out in advance automatic scanning for each channel to determine and store the strength of a signal received in each of multiple receiving directions of the antenna, a best receiving direction, and a maximum value of the received signal strengths, normalize the received signal strengths measured in the respective directions with respect to the maximum received signal strength, and produce and store an antenna direction level pattern including a bar graph that shows the received signal strengths in the respective directions with the normalized values used as the amplitude. In response to a command from a user, the receiver superimposes the level pattern on a video image being received for display on a display screen, so that a user can select a receiving direction on the screen. When image degradation takes place during signal reception by the antenna having been already adjusted in orientation, a user can manually reorient the antenna so as to quickly improve the receiving condition without the need for additional time-consuming automatic scanning for adjustment of the orientation of the antenna.

REFERENCES:
patent: 6334218 (2001-12-01), Jeong et al.
patent: 6982745 (2006-01-01), Miyabayashi
patent: 2003/0005447 (2003-01-01), Rodriguez
patent: 2004/0128689 (2004-07-01), Pugel et al.
patent: 2004/0166811 (2004-08-01), Moon
patent: 2004/0183911 (2004-09-01), Lee
patent: 2004/0196204 (2004-10-01), Shirosaka et al.
patent: 2006/0050005 (2006-03-01), Shirosaka et al.
patent: 2002-320165 (2002-10-01), None
patent: 2003-101897 (2003-04-01), None
patent: 2003-234663 (2003-08-01), None

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