Available Technology

Automated Detection of Duplicate Audio and Voice Recordings

Method of Identifying Duplicate Voice Recording

This technology detects duplicate audio and voice recordings in a sample collection without relying on transcription or phonetic comparison for detection. This method is able to determine that two recordings of different lengths may be duplicates and two recordings of the same length may not be duplicates. This invention is independent of the recording’s language and content.



Click to view PDFs of these patents on the US Patent and Trademark Office website: Patent #7,571,093


  • Voicemail systems
  • Digital libraries
  • Caller ID systems
  • Conference calling systems
  • Auto-dialer detection systems
Patent Number: 
Patent Issue Date: 
August 4, 2009
Lab Representatives
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