Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1984-02-02
1986-08-19
Groody, James J.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358 36, 358340, H04N 5213
Patent
active
046072853
ABSTRACT:
A noise reducing system for a video signal comprises a vertical pre-emphasis circuit supplied with an input video signal which is to be transmitted, for supplying an output signal to a transmission system, and a vertical de-emphasis circuit supplied with the video signal which has been pre-emphasized in the vertical pre-emphasis circuit and has been transmitted through the transmission system. The vertical pre-emphasis circuit has a characteristic for relatively emphasizing the level of high-frequency components of the input video signal having spatial frequencies in a vertical direction of a picture, compared to low-frequency components of the input video signal. On the other hand, the vertical de-emphasis circuit has a characteristic for relatively attenuating the level of the high-frequency components of the pre-emphasized video signal having spatial frequencies in the vertical direction of the picture, compared to the low-frequency components of the pre-emphasized video signal. The characteristics of the vertical pre-emphasis circuit and the vertical de-emphasis circuit cooperate so as to reduce noise having high spatial frequencies in the vertical direction of the picture.
REFERENCES:
patent: 4007483 (1977-02-01), Pham van Cang
patent: 4142211 (1979-02-01), Faroudja
patent: 4200889 (1980-04-01), Strobele
patent: 4316210 (1982-02-01), Wharton
patent: 4348692 (1982-09-01), Ilmer
patent: 4559567 (1985-12-01), Maruichi et al.
"FKTG Tagungsband", manuscripts of lectures held during the 9th Annual Meeting of FKTG of Sep. 21 to 24, 1981 in Ulm, pp. 429 to 457.
"Frequenz 37", 1983, H. 11/12, pp. 324 to 333.
Hirano Shinji
Hirota Akira
Kitamura Hiroyuki
Tsushima Takuya
Bernat Louis
Groody James J.
Toth E. Anne
Victor Company of Japan Ltd.
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