Method for clock rate conversion

Details Method for clock rate conversion Method for clock rate conversion

1984-09-14

1986-09-16

Britton, Howard W.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

370 84, 340347DD, H04N 713, H04N 701

Patent

active

046125736

ABSTRACT:
A method for clock rate conversion of digitized television signals for the acquisition of a television signal having a prescribed processing clock rate is provided wherein the digitized television signal is band-limited, a clock rate conversion being subsequently undertaken. The television signal having a second clock rate is written into a memory 6 and is, in turn, read with the prescribed processing clock rate, whereby an unaltering plurality of data words corresponding to picture points is not output in every television line.

REFERENCES:
patent: 3666888 (1972-05-01), Sekimoto
patent: 4069504 (1978-01-01), Jolivet et al.
patent: 4074307 (1978-02-01), Dischert et al.
patent: 4224481 (1980-09-01), Russell
patent: 4471381 (1984-09-01), Kasuga
patent: 4488176 (1984-12-01), Bond
patent: 4496974 (1985-01-01), Heitman
Haskell, B. G., "Sampling Rate Conversion for NTSC Color Television", IEEE Trans. on Communications, vol. COM-25, No. 7, Jul. 1977, pp. 707-712.
Kraus, Von Gunther, "Notes on the Theory of Linear, Time-Discrete Signal Processing with a Rational Sampling Rate Conversion", Frequenz, vol. 36, No. 10, 1982, pp. 275-279.
Lowry et al, "Coder/Decoder Units for RGB and NTSC Signals", S.M.P.T.E. Journal, vol. 90, No. 10, Oct. 1981, pp. 945-948.

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