Method and apparatus for monitoring TV channel selecting status
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Nov 26, 2002
Grant Date -
N/A
app pub date -
Mar 22, 1999
filing date -
Mar 23, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A monitoring apparatus connected to a TV set selects, from a plurality of internal sources, such as VHF/UHF and BS tuners and built in said TV, and a plurality of external sources connected to the TV set from the outside thereof, such as a CATV tuner and a VCR, the source of video currently displayed on a cathode-ray tube of the TV set by comparing a sync signal of the video signal applied to the cathode-ray tuber and a sync signal of the video signal output from each source. Then the monitoring apparatus determines the currently selected channel by comparing a sync signal of the video signal output from the currently selected source and a sync signal of a video signal of each of broadcast channels generated by reference receivers in the monitoring apparatus independently of the TV set. When the channels cannot be narrowed down to one currently selected channel by the comparison of sync signals, the video signals output from the currently selected source are compared with the video signals of the broadcast channels generated by the receivers to determine one of the channels as being currently selected.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Advertisement
Advertisement
Advertisement
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully