High-pass dither generator and method

Details High-pass dither generator and method High-pass dither generator and method

2006-08-30

2009-08-25

Rogers, Scott A (Department: 2625)

Facsimile and static presentation processing

Static presentation processing

Attribute control

C382S275000, C708S252000, C341S131000

Reexamination Certificate

active

07580157

ABSTRACT:
A method and circuit for generating an M-bit digital dither signal with a substantially uniform probability density function and high-pass spectrum are disclosed. The circuit includes a linear feedback shift register (LFSR) with N storage elements where N>M, and a high-pass filter. The method involves sampling at least M storage elements of the LFSR with each clock cycle to form an M-bit LFSR output and high-pass filtering and the M-bit LFSR output to provide the M-bit dither signal.

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