Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1985-01-08
1987-01-13
Groody, James J.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358 11, 358 12, 358141, H04N 1106, H04N 704, H04N 701
Patent
active
046368574
ABSTRACT:
A scanning line interpolation circuit for interpolating scanning lines of an interlaced television signal to thereby obtain a television signal having the doubled number of scanning lines, in which, in order to improve the quality of the reproduced television picture, the interpolation circuit is constituted by a spatio-temporal filter and a time compression circuit, and in the domain of the spatial vertical frequency and the time frequency, the total frequency characteristic of the spatio-temporal filter and the time compression circuit is set such that the response characteristic becomes zero at the vertical frequency and the time frequency of the scanning frequency of the interlaced television signal.
REFERENCES:
patent: 4322750 (1982-03-01), Lord et al.
patent: 4426661 (1984-01-01), Okada et al.
patent: 4492976 (1985-01-01), van Buul et al.
patent: 4530004 (1985-07-01), Achiha et al.
patent: 4551753 (1985-11-01), Nishiyama et al.
T. S. Robson; A Compatible High Fidelity TV Standard for Satellite Broadcast; 16th Annual SMPIF Television Conference Tomorrow's Television; Feb. 1982; pp. 218-236.
Achiha Masahiko
Ishikura Kazuo
Groody James J.
Hitachi , Ltd.
Peng John K.
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