Digital audio system including a software controlled phase lock

Details Digital audio system including a software controlled phase lock Digital audio system including a software controlled phase lock

1997-03-06

1998-06-02

Peeso, Thomas

Boots, shoes, and leggings

36440001, H04N 136

Patent

active

057614342

ABSTRACT:
A system and method for software control of a phase lock loop which accomplishes synchronization between sampled input audio voice signals and a clock controlling the output signal sampling rate. A memory queue is used to buffer input voice data sampled at an input sampling rate. A DSP retrieves stored voice data from the memory queue at a read rate which is periodically adjusted by the DSP according to the number of stored voice data samples remaining in the queue. The read rate is adjusted so as to maintain the number of stored voice data samples at substantially half of the queue capacity.

REFERENCES:
patent: 5612939 (1997-03-01), Ueki et al.
patent: 5666460 (1997-09-01), Ohta et al.

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