Wireless digital audio music system

  • US 8,131,391 B2
  • Filed: 11/05/2010
  • Issued: 03/06/2012
  • Est. Priority Date: 12/21/2001
  • Status: Active Grant
First Claim
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1. A wireless digital audio headphone comprising:

  • a portable digital audio headphone receiver configured to receive a unique user code bit sequence and a original audio signal representation in the form of packets, said digital audio headphone receiver, capable of mobile operation and configured for direct digital wireless spread spectrum communication with a mobile digital audio transmitter;

    a direct conversion module configured to capture packets and the correct bit sequence within the packets aided by lowering signal detection error through reduced intersymbol interference coding of said audio representation signal respective to said headphone receiver and said mobile digital audio transmitter, said packets embedded in the received spread spectrum signal, the captured packets corresponding to the unique user code;

    a digital demodulator configured for independent CDMA communication operation;

    a decoder operative to decode reduced intersymbol interference coding of original audio signal representation;

    a digital-to-analog converter (DAC) generating an audio output of said original audio signal representation; and

    a module adapted to reproduce said generated audio output in response to the unique user code bit sequence being recognized, said audio having been wirelessly transmitted and reproduced virtually free from interference from device transmitted signals operating in the wireless headphone spectrum.

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