Field-frequency doubling circuit

Details Field-frequency doubling circuit Field-frequency doubling circuit

1985-08-30

1986-07-29

Groody, James J.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358 11, H04N 701, H04N 1120

Patent

active

046033513

ABSTRACT:
By providing, in a field-frequency doubling circuit comprising a converter circuit (3) of an A, A, B, B, type, an interpolation circuit (31) which combines, in an appropriate manner, the information of two subjacent lines of a first field of a picture of the television signal to be converted and a second field of a picture of the television signal to be converted, line flicker can be prevented from occurring without it being necessary to provide a movement detector and a change-over switch for an A, B, A, B-type conversion.

REFERENCES:
patent: 4051531 (1977-09-01), Baldwin
patent: 4276565 (1981-06-01), Dalton et al.
patent: 4322750 (1982-03-01), Lord et al.
patent: 4435728 (1984-03-01), Raven et al.

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