Channel tuning apparatus

Details Channel tuning apparatus Channel tuning apparatus

2005-03-08

2005-03-08

Lee, Michael H. (Department: 2614)

Television

Receiver circuitry

Tuning

C348S732000, C455S180100, C455S168100, C455S186100

Reexamination Certificate

active

06864926

ABSTRACT:
A channel tuning apparatus which improves operability by eliminating a need for a user to select a CATV mode and allows reliable channel tuning without misjudging the presence or absence of signals even if a frequency of a CATV broadcast is shifted. The channel tuning apparatus includes a tuner (2) for receiving signals from an antenna (1), a demodulation unit (3) for demodulating the received signals coming from the tuner (2), an input unit (6) for selecting a specific channel for the tuner (2), a detection unit (4) for determining receive mode, and a memory unit (5) for storing the detected data by the detection unit (4), in which the channel tuning apparatus is configured to, before performing automatic channel tuning, tune to a specific channel determined by the input unit (6), detect the receive mode and shift in the received frequency, and store them for use as initial data for automatic channel tuning.

REFERENCES:
patent: 4737993 (1988-04-01), DeVilbiss
patent: 5087977 (1992-02-01), Suizu
patent: 5659352 (1997-08-01), Lee
patent: 6433830 (2002-08-01), Groff et al.
patent: 5-64094 (1993-03-01), None
patent: 7-123328 (1995-05-01), None

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