Apparatus and method for reducing quantizing distortion

Details Apparatus and method for reducing quantizing distortion Apparatus and method for reducing quantizing distortion

1991-10-28

1992-10-20

Britton, Howard W.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358135, 358138, 358160, H04N 713

Patent

active

051574896

ABSTRACT:
This invention is a method and apparatus for passing quantized electronic signals of a given quantizing resolution through processing systems which have a quantizing accuracy less than that which the electronic signal is quantized to. The invention includes truncating the quantized signal to a given precision matching the precision of the processing system, and offsetting the truncated signal by a predetermined amount, normally 1 LSB, in a predetermined and predictable manner. The offsetting is preferred to occur in a regular pattern which is changed in response to the values of the bits which are discarded in the truncation.

REFERENCES:
patent: 4602333 (1986-07-01), Komori

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