Motion video signal processing for recording or reproducing – Local trick play processing – With randomly accessible medium
Patent
1995-06-07
1997-09-30
Truong, Khoi D.
Motion video signal processing for recording or reproducing
Local trick play processing
With randomly accessible medium
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.
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Ko Jung Wan
Limberg Allen LeRoy
Schnitzler Raymond
Strolle Christopher H.
Weckenbrock Hermann J.
Bushnell Esq. Robert E.
Samsung Electronics Co,. Ltd.
Truong Khoi D.
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