Motion video signal processing for recording or reproducing – Local trick play processing – With randomly accessible medium
Patent
1995-06-07
1997-01-21
Tran, Thai Q.
Motion video signal processing for recording or reproducing
Local trick play processing
With randomly accessible medium
358316, 358318, 348427, 348438, 348663, 348666, 348708, 348712, 386 10, 386 33, 386 44, H04N 979
Patent
active
055964184
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 W.
Limberg Allen L.
Schnitzler Raymond
Strolle Christopher H.
Weckenbrock Hermann J.
Bushnell Esq. Robert E.
Samsung Electronics Co,. Ltd.
Tran Thai Q.
Truong Khoi
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