Video-signal processing device

Details Video-signal processing device Video-signal processing device

1991-09-17

1992-06-02

Britton, Howard W.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

36472410, H04N 514

Patent

active

051191938

ABSTRACT:
A video signal processing device includes a first interpolation filter, a second interpolation filter, a frequency component detection circuit and a switching circuit. The first interpolated signal free from deterioration in a horizontal direction and the second interpolated signal permitting smooth interpolation in an oblique direction are selected in accordance with the horizontal frequency component of a picture pattern. Therefore, in the in-field interpolation processing for double-speed conversion, the horizontal resolution is not deteriorated for the image having a fine picture pattern and also smooth interpolation can be made for the image having an oblique component.

REFERENCES:
patent: 4933766 (1990-06-01), de Haan
patent: 4947251 (1990-08-01), Hentschel
patent: 5014129 (1991-05-01), Imanishi
patent: 5016103 (1991-05-01), Rabii
patent: 5049998 (1991-09-01), Lee

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