Television circuit for changing an interlace factor

Details Television circuit for changing an interlace factor Television circuit for changing an interlace factor

1980-07-07

1981-12-22

Martin, John C.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358244, H04N 504, H04N 584

Patent

active

043074219

ABSTRACT:
A television circuit for changing an interlace factor by a factor of two or an integral power thereof and by a factor of a half, respectively. The circuit comprises a frequency division circuit which, when the field synchronizing signal to be processed, is applied to it supplies a square-wave output signal as a gate signal, and signal channels each having a multivibrator circuit and a first and a second subsequent series-arranged coincidence gate. In two signal channels the field synchronizing signal is applied to the multivibrator circuit and to the second gate, a signal originating from an other signal channel being used for this purpose in further signal channels.

REFERENCES:
patent: 4096530 (1978-06-01), Plugge et al.
patent: 4251835 (1981-02-01), Eriksen

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