Noise reduction apparatus

Details Noise reduction apparatus Noise reduction apparatus

1982-04-29

1985-02-19

Martin, John C.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358167, H04N 521

Patent

active

045009112

ABSTRACT:
A noise reduction apparatus for reducing noises contained in a television picture signal is realized by comprising a low pass filter for filtering out noise components together with higher frequency components of the picture signal, the latter being compensated thereafter in response to detection of edge portions of the picture, as well as realized by utilizing interframe correlation of the television picture signal for reducing random noise components together with interframe varying components caused by motion of the picture, the latter being compensated thereafter in response to detection of the motion of the picture, which motion is discriminated by interframe variation of a group of picture elements. As a result, the noise reduction of the picture signal can be efficiently attained without any deterioration of picture quality, which is conventionally accompanied therewith.

REFERENCES:
patent: 4090221 (1978-05-01), Conner
patent: 4242704 (1980-12-01), Ito et al.
patent: 4242705 (1980-12-01), Ebihara
patent: 4296436 (1981-10-01), Achiha

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