Comb filter with a smaller number of delay elements

Details Comb filter with a smaller number of delay elements Comb filter with a smaller number of delay elements

1996-06-26

1998-07-07

Malzahn, David H.

Boots, shoes, and leggings

G06F 1710

Patent

active

057779082

ABSTRACT:
A stage associated with a factor N.sub.k of a 1/N (N=N.sub.1 . . . N.sub.k . . . N.sub.L) thinning filter is constituted of a digital integrator which is cleared at every period of N.sub.k+1 samples, and a transposed comb filter which operates at 1/N.sub.1 . . . N.sub.k of an input sampling frequency and has N/N.sub.1 . . . N.sub.k taps. Similarly, a stage associated with a factor N.sub.k of an N-fold interpolation filter is constituted of a transposed comb filter which operates at 1/N.sub.1 . . . N.sub.k of an output sampling frequency and has N/N.sub.1 . . . N.sub.k taps, and a hold circuit for holding output data of the transposed comb filter for a period of N.sub.k+1 samples.

REFERENCES:
patent: 4999798 (1991-03-01), McCaslin et al.
patent: 5043933 (1991-08-01), Boutaud et al.
patent: 5079734 (1992-01-01), Riley
patent: 5455782 (1995-10-01), Young et al.
patent: 5596609 (1997-01-01), Genrich et al.
patent: 5689449 (1997-11-01), Saramaki et al.
The Transaction of the Inst. of Electronics, Info & Communication Engineers of Japan, A, vol. J74-A, No. 9, pp. 1366-1373, Sep. 1991.
IEEE Acoustics, Speech, and Signal Processing Magazine, vol. 29, No. 2, Apr. 1981, New York US, pp. 155-162, XP000560569, Eugene B. Hogenauer: "An Economical Class of Digital filters for Decimation and Interpolation".
IEEE Transactions on Circuits and Systems, vol. 31, No. 11, Nov. 1984, New York US, pp. 913-924, XP002021350, Shuni Chu et al.: "Multirate Filter Designs Using Comb Filters".

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