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Method and apparatus for converting an analog audio source into a digital format

  • US 6,710,955 B2
  • Filed: 06/01/2001
  • Issued: 03/23/2004
  • Est. Priority Date: 06/01/2001
  • Status: Expired due to Fees
First Claim
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1. A method for detecting index tone in an existing analog audio signal as it is converted into a digital audio signal for a digital talking book, said method comprising the steps of:

  • a) detecting a plurality of silence events in the digital audio signal as potential index tones;

    b) measuring sample lengths of each of said potential index tones for detecting and removing an anomaly index tone from said potential index tones; and

    c) associating said remaining potential index tones with pages and chapters of the digital talking book.

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