Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1989-11-13
1991-02-05
Kostak, Victor R.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
3647241, H04N 701
Patent
active
049910108
ABSTRACT:
An interpolation filter is used in television standards conversion to decimate an input sequence of higher definition signals into an output sequence of lower definition signals. The filter is partitioned into a plurality of computational stages. Within each stage, the decimation coefficients are stored in a random access coefficient memory and applied to a multiplier to generate the product of a digital input signal and a stored coefficient. The RAM is operable in two modes: a first mode in which new sets of coefficients are serially input to the RAM during the field blanking period and a second mode in which different stored coefficients are output to the multiplier for consecutive digital signals to effect a non-integer decimation ratio.
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Specification for the L64260/L64261 High-Speed Versatile FIR Filter.
Specification for the TMC 230 Image Resampling Sequencer.
Hailey Keith R.
Storey John J.
Eastman Kodak Company
Kostak Victor R.
Woods David M.
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