Method and apparatus for providing a digital audio interface pro

Details Method and apparatus for providing a digital audio interface pro Method and apparatus for providing a digital audio interface pro

1992-01-17

1994-03-22

Kuntz, Curtis

Pulse or digital communications

Spread spectrum

Direct sequence

375116, 375111, H03D 324

Patent

active

052971813

ABSTRACT:
A digital audio interface protocol carries multiple channels of digital audio information serially between a transmitting digital audio tape recorder and a plurality of receiving recording units. Using a three stage process, the circuitry of the present invention allows the receiving VCO's to "lock on" to the sampling rate of the serial digital data stream without any explicit sampling information. In a first stage, the VCO frequency is adjusted until a sync pattern is properly received. In a second stage, the VCO frequency is adjusted to oscillate a preselected number of times between sync pattern occurrences. In a third stage, the VCO phase is adjusted to match the phase of the serial data stream.

REFERENCES:
patent: 4803703 (1989-02-01), DeLuca et al.
patent: 5010559 (1991-04-01), O'Connor et al.

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