Field frequency-doubling circuit for a television signal

Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry

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H04N 502

Patent

active

044357281

ABSTRACT:
A field-frequency doubling circuit for a television signal having two field memories (23, 29) may alternatively be employed as a picture memory for the television signal when it is slightly extended by providing a re-write circuit (9, 11) and an adapted output circuit (17, 47) (FIG. 1). This picture memory may be included in, for example, a noise suppression circuit or a movement detector.

REFERENCES:
patent: 3830971 (1974-08-01), van de Polder
patent: 3832487 (1974-08-01), de Niet
patent: 4051531 (1977-09-01), Baldwin
patent: 4276565 (1981-06-01), Dalton
patent: 4322750 (1982-03-01), Lord

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