Method and apparatus for compressing signals in a fixed point fo

Details Method and apparatus for compressing signals in a fixed point fo Method and apparatus for compressing signals in a fixed point fo

1998-08-14

2000-11-14

Malzahn, David H.

Electrical computers: arithmetic processing and calculating

Electrical digital calculating computer

Particular function performed

G06F 738

Patent

active

061483176

ABSTRACT:
A method and apparatus for compressing fixed point signals without introducing a bias. Signals are compressed according to a dithered rounding approach wherein signal values are rounded up and rounded down with approximately equal probability, canceling the bias that would otherwise result from the rounding operation. Numerical properties of the input signal are exploited in order to determine whether the signal value should be rounded up or down. Signal compression may, therefore, be introduced at multiple points within a system without accumulating a signal bias and degrading downstream performance. Further, one bit signal compression may be achieved in a particularly efficient fashion with a minimal amount of hardware.

REFERENCES:
patent: 5214598 (1993-05-01), Hammerstrom
patent: 5329475 (1994-07-01), Juri et al.
patent: 5424967 (1995-06-01), Lee
patent: 5696710 (1997-12-01), Hague et al.

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