×

Digital telephonic system for stethoscope signal processing

  • US 5,841,846 A
  • Filed: 09/16/1996
  • Issued: 11/24/1998
  • Est. Priority Date: 09/16/1996
  • Status: Expired due to Term
First Claim
Patent Images

1. A method for converting, encoding and decoding analog and digital signals, while maintaining the quality and fidelity of auscultation sounds originating from a stethoscope, to enable a patient at a patient station to transmit the sounds to a doctor at a remote doctor station comprising the steps of:

  • amplifying analog signals from a chest piece at said patient station;

    filtering said signals to get resultant signals;

    feeding said resultant signals to a PCM encoder to transform said analog signals into a stream of binary data;

    transferring said stream of binary data to a UART and to an ADPCM encoder and subsequently to a first modem;

    sending said binary data from said first modem to a telephone line;

    receiving said binary data from said telephone line via a second modem at said doctor station;

    transferring said binary data from said second modem to a UART and to a repeated byte error handling circuit;

    transferring said binary data from said repeated byte error handling circuit to an ADPCM decoder;

    decoding said binary signal to extract said analog signal via a PCM decoder;

    filtering said signal; and

    amplifying said signal to be received by a headset at said doctor station.

View all claims
  • 2 Assignments
Timeline View
Assignment View
    ×
    ×