Video signal processing circuit of motion adaptive type

Details Video signal processing circuit of motion adaptive type Video signal processing circuit of motion adaptive type

1987-04-09

1988-03-22

Britton, Howard W.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358 21R, 358160, H04N 514

Patent

active

047332972

ABSTRACT:
A video signal processing circuit of motion adaptive type includes a circuit for identifying motion of a picture in a video signal on the basis of a difference signal between at least a line signal appearing in an M-th field and a corresponding line signal appearing in an (M-1)th field so that, when a scanning line produced on the basis of the video signal is interpolated between scanning lines of the video signal to improve the picture quality, a signal for interpolating said scanning line is produced in a different manner depending on whether a portion of the video signal to the displayed is a still picture or a moving picture. The motion identifying circuit comprises a horizontal filter spreading the difference signal in the horizontal direction, a circuit delaying the output signal of the horizontal filter by one field after attenuation, a line memory delaying the output signal of the attenuating and delaying circuit by one line, and an output circuit generating a signal identifying the motion of the picture on the basis of the output signals of the horizontal filter, attenuating and delaying circuit and line memory.

REFERENCES:
patent: 4543607 (1985-09-01), Taylor
patent: 4626891 (1986-12-01), Achiha
patent: 4636862 (1987-01-01), Hatori
patent: 4639767 (1987-01-01), Suzuki
patent: 4641180 (1987-02-01), Richter

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