Deemphasis & Subsequent reemphasis of high-energy reversed-spect

Motion video signal processing for recording or reproducing – Local trick play processing – With randomly accessible medium

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Details

386 33, 348708, 348712, H04N 979

Patent

active

056733550

ABSTRACT:
A system for reproducing a luminance signal from a medium containing a previously recorded luminance signal with a high-frequency portion thereof compressed in dynamic range includes a circuit for recovering that luminance signal from the medium. Filtering is done to separate the low-frequency and compressed-in-dynamic-range high-frequency portions of the recovered luminance signal from each other. A corer responds to the separated compressed-in-dynamic-range high-frequency portion of the recovered luminance signal to provide a cored high-frequency portion with expanded dynamic range and reduced noise. The level of the cored high-frequency portion with expanded dynamic range and reduced noise is then boosted by a predetermined amount to compensate for energy losses during the compression of the dynamic range and added back to the low-frequency portion of the recovered luminance signal to reproduce a full-band luminance signal with at least partially restored dynamic range for high-frequencies and without readily visible high-frequency noise.

REFERENCES:
patent: 4621286 (1986-11-01), Reitmeier et al.
patent: 4660072 (1987-04-01), Fukinuki
patent: 4668988 (1987-05-01), Sasaki et al.
patent: 4720751 (1988-01-01), Peters
patent: 4742386 (1988-05-01), Wilkinson
patent: 4745460 (1988-05-01), Fukinuki
patent: 4811116 (1989-03-01), Baumeister
patent: 4831463 (1989-05-01), Faroudja
patent: 4870481 (1989-09-01), Kawamata
patent: 4885631 (1989-12-01), Fukinuki et al.
patent: 4891699 (1990-01-01), Hamada et al.
patent: 4943848 (1990-07-01), Fukinuki
patent: 4963991 (1990-10-01), Honjo
patent: 4984093 (1991-01-01), Schmidtmann et al.
patent: 5031030 (1991-07-01), Hurst, Jr.
patent: 5063457 (1991-11-01), Ishikawa et al.
patent: 5067009 (1991-11-01), Ganse
patent: 5113262 (1992-05-01), Strolle et al.
patent: 5161030 (1992-11-01), Song
patent: 5182642 (1993-01-01), Gersdorff et al.
Journal of British I.R.E. on "Reduction of Television Bandwidth by Frequency-Interlace", Feb. 1960, pp. 127-136 (disclosed by Howson and Bell).

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