Automatic frequency control method and receiving apparatus using

Details Automatic frequency control method and receiving apparatus using Automatic frequency control method and receiving apparatus using

1990-09-27

1992-04-21

Groody, James J.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

4551922, 455316, H01N 550

Patent

active

051073358

ABSTRACT:
A second IF signal is counted either directly or indirectly. An AFC operation is performed based on the counting result. A plurality of count periods (A1, C1) are provided within a video signal period (Y+H) including a horizontal blanking period, and the plurality of count periods (A1, C1) are randomly shifted for each field. An AFC operation is performed based on a plurality of counting results in a plurality of field periods which correspond to one cycle of an energy diffusion signal.

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"High-Performance BS Tuner", National Technical Report, vol. 34, No. 5, Oct. 1988.

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