All-digital FM stereo demodulator and demodulation method

Details All-digital FM stereo demodulator and demodulation method All-digital FM stereo demodulator and demodulation method

2005-05-31

2005-05-31

Woo, Stella (Department: 2643)

Electrical audio signal processing systems and devices

Binaural and stereophonic

Broadcast or multiplex stereo

Reexamination Certificate

active

06901146

ABSTRACT:
A stereo composite signal including a pilot signal is demodulated by processing input samples to obtain internal samples having variable sampling timings, synchronizing these sampling timings with the pilot signal, and digitally processing the internal samples to obtain stereo audio data. The internal samples may be obtained from the input samples by decimation or interpolation. Since the sampling frequency and sampling timing of the input samples do not have to be precisely controlled, no voltage-controlled oscillator is needed, and the demodulator can easily be incorporated into a monolithic integrated circuit.

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Haug et al., A DSP-Based Stereo Decoder or Automotive Radio, 8 pgs.

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