Sampling rate converting method and apparatus

Details Sampling rate converting method and apparatus Sampling rate converting method and apparatus

1996-09-18

1998-02-17

Gaffin, Jeffrey A.

Coded data generation or conversion

Digital code to digital code converters

Data rate conversion

3647241, H03H 1700

Patent

active

057195714

ABSTRACT:
A sampling rate converting method and apparatus for converting the sampling frequency of a 1-bit digital data obtained by a .SIGMA..DELTA. modulator to 32 kHz, 48 kHz, 96 kHz or 192 kHz without producing jitter. A decimation filter 3 decimates the sampling frequency of 1-bit digital data of 2.8224 MHz supplied from an input terminal 2 by 1/21-tuple decimation. An interpolation filter 4 oversamples the frequency of the output of the decimation filter 3 by quintuple oversampling with an integer ratio of 1:5. A decimation filter 5 decimates the frequency of the output of the interpolation filter 4 by 1/21-tuple decimation with an integer ratio of 21:1.

REFERENCES:
patent: 4020332 (1977-04-01), Crochiere
patent: 4996528 (1991-02-01), Asghar
patent: 5126737 (1992-06-01), Torii
patent: 5225787 (1993-07-01), Merssen
patent: 5457456 (1995-10-01), Norsworthy

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