Facsimile and static presentation processing – Static presentation processing – Attribute control
Patent
1988-05-11
1990-01-09
Shepperd, John W.
Facsimile and static presentation processing
Static presentation processing
Attribute control
358 16, H04N 978, H04N 1114
Patent
active
048931764
ABSTRACT:
A method for processing a quadrature modulated color television picture signal including a luminance component and a chrominance component to reduce cross-color and cross-luminance artificacts in a resultant signal includes in an encoding process the steps of: comb filtering the quadrature modulated chrominance component in a comb filter structure wherein a number of delays between 2 and 13 is adaptively determined by overlap between chrominance and luminance, and the delay is a predetermined one of line scan period, frame scan period, and frame/line scan periods, to put out a comb filtered chroma component; processing the luminance component by passing the luminance component through two complementary filters both symmetrically centered about a chrominance component subcarrier frequency, one filter comprising a band pass filter and the other filter comprising a band reject filter; comb filtering the luminance signal passing through the band pass filter in a comb filter structure wherein a number of delays between 2 and 13 is adaptively determined by overlap between chrominance and luminance, and the delay is the same predetermined one of line scan period, frame scan period, and frame/line scan periods to produce a comb filtered high frequency luminance signal; and adding in phase the comb filtered high frequency luminance signal and the signal passing through the band reject filter in order to provide a comb filtered full bandwidth luminance signal; and, combining in phase the comb filtered chroma component and the comb filtered full bandwidth luminance signal in order to put out a composite signal for transmission or recording. Comb filter decoding having fixed delays are advantageously employed within a system of the present invention.
REFERENCES:
patent: 3743766 (1973-07-01), Loose et al.
patent: 3872498 (1975-03-01), Pritchard
patent: 4345268 (1982-08-01), Clarke
patent: 4476484 (1984-10-01), Haskell
patent: 4567508 (1986-01-01), Hulyer
patent: 4597007 (1986-06-01), Reitmeier et al.
patent: 4683490 (1987-07-01), Strolle et al.
R. Turner, Some Thoughts on Using Comb Filters in the Broadcast Television Transmitter and at the Receiver, IEEE Transactions on Consumer Electronics, vol. CE-23, No. 3, Aug. 1977.
Harrison David B.
Shepperd John W.
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