Digital audio signal demodulator

Details Digital audio signal demodulator Digital audio signal demodulator

1994-12-29

1996-10-29

Chin, Stephen

Pulse or digital communications

Receivers

Angle modulation

375361, 375362, H04L 2722

Patent

active

055703933

ABSTRACT:
A digital audio signal demodulator which demodulates an input digital audio interface format signal inputted with asynchronous serial bits to a non-return to zero (NRZ) signal, corrects error per frame, and provides the error-corrected NRZ signal, being synchronized with a digital-to-analog conversion control signal. According to the demodulator, data in the digital audio interface format signal except a header region is demodulated in a demodulating section and the demodulated NRZ data is converted into parallel NRZ data by a serial-parallel conversion section. The even parity error of the parallel NRZ data is corrected in accordance with error check pulses from an error detecting and latch section, and the error-corrected parallel NRZ data is converted into serial data by a parallel-serial conversion section to be provided to a following digital-to-analog converter. A digital-to-analog conversion control signal is provided from a conversion control signal generating means, being synchronized with the digital audio interface format signal.

REFERENCES:
patent: 4242755 (1980-12-01), Gauzan
patent: 4592072 (1986-05-01), Stewart
patent: 5040195 (1991-08-01), Kosaka et al.

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