Digital signal processing apparatus

Details Digital signal processing apparatus Digital signal processing apparatus

1995-11-03

2000-02-22

Young, Brian K.

Coded data generation or conversion

Sample and hold

Having variable sampling rate

H03M 700

Patent

active

060285427

ABSTRACT:
A digital signal processing apparatus for matching the sampling frequency of an input digital signal to an internal sampling frequency. The digital signal processing apparatus has a sampling frequency converting unit for matching the sampling frequency of an input digital signal to an internal sampling frequency, a sampling frequency detection unit for detecting the sampling frequency of the input digital signa, a frequency difference calculating unit for finding the frequency difference between the inherent sampling frequency of the input digital signal and the sampling frequency detected by the sampling frequency detection unit and a pitch shifting unit for shifting the pitch of an output digital signal of the sampling frequency converting unit based upon said frequency difference. If the input digital signal has the sampling frequency slightly offset from the inherent sampling frequency, the signal of the inherent sampling frequency can be recovered, while the pitch can be restored to the inherent pitch.

REFERENCES:
patent: 5495432 (1996-02-01), Ho

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