Facsimile and static presentation processing – Static presentation processing – Attribute control
Patent
1981-11-06
1983-12-20
Martin, John C.
Facsimile and static presentation processing
Static presentation processing
Attribute control
358 31, H04N 9535
Patent
active
044220944
ABSTRACT:
A digital memory is provided which contains digital data words representative of a desired symmetrical transfer characteristic of a digital signal processor. Digital signals which are to be processed are applied to the address inputs of the memory, producing output signals in conformance with the desired transfer characteristic. Advantage is taken of the symmetrical nature of the response characteristic to minimize the size of the memory. Data words corresponding to only a portion of the full dynamic range of the digital signal processor are stored in the memory, and memory locations are addressed and read out in accordance with the value of a polarity-determining bit of the input digital signal, with the output signals being translated over the required full dynamic range in accordance with the value of the polarity-determining bit. In a preferred embodiment of the invention, the memory is a random access memory, with stored data values being altered in response to a user control to change the transfer characteristic of the processor.
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U.S. patent application Ser. No. 06/286,264, of R. A. Dischert, entitled Controlled RAM Signal Processor, filed Jul. 23, 1981.
Acampora Alfonse
Lewis, Jr. Henry G.
Coles Edward L.
Herrmann E. P.
Martin John C.
Rasmussen P. J.
RCA Corporation
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