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Portable telephone set

  • US 6,556,665 B1
  • Filed: 07/07/1999
  • Issued: 04/29/2003
  • Est. Priority Date: 07/14/1998
  • Status: Expired due to Fees
First Claim
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1. A digital portable telephone comprising:

  • input means for inputting an analog audio signal;

    amplifying means for amplifying said analog audio signal into an amplified audio signal;

    A/D conversion means for converting said amplified audio signal into a digital audio signal;

    compressing means for compressing said digital audio signal into a compressed audio signal;

    memory means for storing said compressed audio signal as a stored audio signal, for storing an alarm sound, and for storing a melody;

    control means for selecting an alarm signal for automatically notifying a user of an alarm condition, said alarm condition being different from the arrival of a call, wherein said alarm signal is one of said melody, said alarm sound and said stored audio signal;

    decompressing means for decompressing said stored audio signal selected by said control means into a decompressed audio signal;

    D/A conversion means for converting said decompressed audio signal, said alarm sound, or said melody into a notification signal;

    amplifying means for amplifying said notification signal into an amplified notification signal; and

    notifying means for annunciating said amplified notification signal to the user to notify the user of the alarm condition, wherein, if said control means selected said stored audio signal as an alarm signal, said amplified notification signal resembles said analog audio signal.

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