Digital filter sampling rate conversion method and device

Details Digital filter sampling rate conversion method and device Digital filter sampling rate conversion method and device

1990-07-19

1992-05-05

Mai, Tan V.

Boots, shoes, and leggings

36472416, G06F 1531

Patent

active

051114178

ABSTRACT:
A digital filter providing output samples at a rate B while input samples are being provided at a rate A. The filter impulse response h(t) is sampled at a rate P=a.A=b.B, with P being the lowest common multiple to A and B, to derive Np filter coefficients therefrom. The coefficients are arranged into "a" sets of Np/a coefficients and stored. Output samples are then computed by feeding input samples Sn at incoming rate while permutating the sets of coefficients and generating output samples at the output rate.

REFERENCES:
patent: 4584659 (1986-04-01), Stikvoort
patent: 4604720 (1986-08-01), Stikvoort
patent: 4725972 (1988-02-01), Gockler
patent: 4748578 (1988-05-01), Lagadec et al.
Croisier et al, "The digital Echo Modulation", IEEE Trans. Communication Technology, COM-18, pp. 367-376 (1970).
Goddard et al, "A 2400-Bits/s Microprocessor-Based Modem", IBM Journal of Research and Development, vol. 25, No. 1, Jan. 1981, pp. 17-24.

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