Field decision circuit

Details Field decision circuit Field decision circuit

1994-02-16

1995-12-05

Groody, James J.

Television

Synchronization

Sync separation

H04N 510, H04N 508

Patent

active

054733871

ABSTRACT:
The field decision circuit includes: a field information generating circuit for outputting one of a plurality of signals as a first field information for each field in response to a pulse signal; a comparator for outputting a comparison result indicating whether the first field information agrees with second field information from an external circuit for each field; a memory for storing a predetermined number of comparison results over the predetermined number of fields; an evaluation circuit for outputting an evaluation result obtained by evaluating whether the predetermined number of comparison results satisfy a predetermined relationship; and a correction circuit for supplying the pulse signal to the field information generating circuit in accordance with the evaluation result.

REFERENCES:
patent: 4858008 (1989-08-01), Sieben et al.
patent: 5012339 (1991-04-01), Kurata et al.
patent: 5025496 (1991-06-01), Canfield
patent: 5151786 (1992-09-01), Kawamoto
patent: 5247359 (1993-09-01), Okada et al.
patent: 5327175 (1994-07-01), Kim

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