Facsimile and static presentation processing – Static presentation processing – Attribute control
Patent
1991-10-24
1993-10-12
Groody, James J.
Facsimile and static presentation processing
Static presentation processing
Attribute control
358180, 358138, 358 13, H04N 1102
Patent
active
052530434
ABSTRACT:
A digital processing system for providing spectral headroom to accommodate harmonic distortion components resulting from non-linear processing of digitized samples of video signals is shown. A standard set of video signal samples are all upsampled and filtered so that they have a common sampling rate. These are filtered to provide spectral headroom. Non-linear operations are then performed on the upsampled and filtered sequences. After processing, the processed upsampled signals are filtered to remove the harmonic components, and then the signals are decimated to reestablish their original sampling rates. This provides non-linear processing for signal sequences which were originally band limited, yet avoids the appearance of aliased frequencies in the output that normally result from harmonic distortion components generated by non-linear processing.
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CCIR Recommendation 601-1, 1986 L64260/L64261 High Speed Versatile FIR Filter (VFIR) Preliminary LSI Logic Corporation.
Da Vinci Systems, Inc.
Groody James J.
Murrell Jeffrey S.
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