Noise reduction system for video signal

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

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358 36, 358340, H04N 521

Patent

active

047500379

ABSTRACT:
A noise reduction system for reducing noise in a video signal comprises a pre-emphasis circuit for subjecting the video signal which is supplied to a transmission system to a pre-emphasis in a vertical direction of a picture and in a direction oblique to the vertical direction, and a de-emphasis circuit for subjecting the pre-emphasized video signal obtained through the transmission system to a de-emphasis complementary to the pre-emphasis.

REFERENCES:
patent: 4485399 (1984-11-01), Schulz
patent: 4575760 (1986-03-01), Nakagaki et al.
patent: 4587576 (1986-05-01), Hirota et al.
patent: 4607285 (1986-08-01), Hirota et al.
patent: 4618893 (1986-10-01), Hirota et al.
patent: 4626927 (1986-12-01), Hirota et al.

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