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Fast waveform synchronization for concentration and time-scale modification of speech

  • US 7,058,569 B2
  • Filed: 09/14/2001
  • Issued: 06/06/2006
  • Est. Priority Date: 09/15/2000
  • Status: Expired due to Term
First Claim
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1. A digital waveform concatenation system for use in an acoustic processing application, the system comprising:

  • a digital waveform provider that produces an input sequence of at least two digital waveform segments, each waveform segment being a sequence of samples; and

    a waveform concatenator that;

    i. synchronizes input waveform segments to form a sequence of partially overlapping waveform segments, andii. weights and adds selected portions of the overlapping waveform segments to concatenate the input waveform segments so as to produce a single digital waveform;

    wherein for segments of voiced speech, the synchronizing includes aligning a minimum energy anchor in each waveform segment with a corresponding minimum energy anchor of an adjacent waveform segment, each minimum energy anchor location in a given segment being optimized based on determining minimum weighted energy in a neighborhood of a boundary of the given segment.

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