Digital filter having a substantially equal number of negative a

Details Digital filter having a substantially equal number of negative a Digital filter having a substantially equal number of negative a

1996-09-05

1999-07-27

Mai, Tan V.

Electrical computers: arithmetic processing and calculating

Electrical digital calculating computer

Particular function performed

G06F 1710

Patent

active

059283149

ABSTRACT:
In a digital filter in which coefficients are realised using power of two weighting factors, it can occur that due to rounding errors the output signal shows some inaccuracies. By decomposing the filter coefficients into powers of two in such a way that most powers of two have a counterpart with an opposite sign, the rounding errors tend to cancel, resulting in a more accurate filter.

REFERENCES:
patent: 3979701 (1976-09-01), Tomozawa
patent: 4862402 (1989-08-01), Shah et al.
patent: 5287299 (1994-02-01), Lin
patent: 5757683 (1998-05-01), Deczky

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