Multirecording method eliminating striped-pattern interference

Details Multirecording method eliminating striped-pattern interference Multirecording method eliminating striped-pattern interference

1987-10-19

1989-04-04

McElheny, Jr., Donald

Facsimile and static presentation processing

Facsimile

Recording apparatus

358138, 358330, 358327, H04N 595

Patent

active

048190861

ABSTRACT:
A multirecording method in which a multiplex sub-Nyquist-sampling video signal is multirecorded together with a predetermined signal, such as a pilot or audio signal, with no generation of striped-pattern interference in the reproduced picture. In accordance with the invention, the frequency of the predetermined signal is set at m/(2n+1) times as high as the horizontal scanning frequency of the video signal, where n is a natural number of m is a natural number other than an integral multiple of (2n+1).

REFERENCES:
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Digitalie Signalverarbeitung von FM-Modulierten Signalen: by Demmer, Draheim & Gutsman, published Digitaltechnik NTZ Bd. 37(1984) Heft 7 pp. 414-419.
"Two Dimensional Analysis of Sub-Nyquist Sampling of NTSC Color TV Signals at 1.5 f.sub.sc," by Achiha & Ishikura; published in Electronics and Communications in Japan, vol. 63-B, No. 6, 1980, pp. 43-50.
"Composite Television Coding: Subsampling of Interpolation," by Brainard, Netravali & Pearson, published in SMPTE Journal, Aug. 1982, pp. 717-724.

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