Channel selecting apparatus having a channel skip function

Details Channel selecting apparatus having a channel skip function Channel selecting apparatus having a channel skip function

1992-04-06

1993-03-09

Razavi, Michael T.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

3581931, 3581951, H04N 550

Patent

active

051930056

ABSTRACT:
In a CATV receiver or television receiver channel selecting apparatus provided with a controlling device wherein, on the basis of a channel-up or channel-down channel selecting operation, data corresponding to local oscillation frequencies of the respective channels are output, a tuning voltage is prepared by using these data and the local oscillation frequency of the tuner is controlled, the above mentioned controlling device is provided with a device for memorizing the information as to whether it is inhibited or permitted to select the respective channels at the time of the channel-up or channel-down channel selection so as to memorize the common channel selection inhibiting information for a plurality of channels not allowed to exist simultaneously and to be ablve to save the memory capacity of the memory (RAM) of the channel selecting microcomputer; and further, a device for quickly searching the input signal frequency of the channel without a mis-operation in the case of selecting an objective channel at the time of the up/down channel selection is provided.

REFERENCES:
patent: 4249259 (1981-02-01), Oda et al.
patent: 4737993 (1988-04-01), DeVilBiss
patent: 4763195 (1988-08-01), Tults
patent: 4776038 (1988-10-01), Testin et al.
patent: 4821122 (1989-04-01), Teskey
patent: 4823387 (1989-04-01), Tults
patent: 4939789 (1990-07-01), Sakashita et al.
patent: 5034819 (1991-07-01), Tsukagoshi

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