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Speech synthesizer, audio watermarking information detection apparatus, speech synthesizing method, audio watermarking information detection method, and computer program product

  • US 10,109,286 B2
  • Filed: 09/14/2017
  • Issued: 10/23/2018
  • Est. Priority Date: 01/18/2013
  • Status: Active Grant
First Claim
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1. An audio watermarking information detection apparatus comprising:

  • a memory; and

    one or more processors configured to function as a pitch mark estimator, a phase extractor, a representative phase calculator and a determination unit, whereinthe pitch mark estimator estimates a pitch mark of a synthesized speech in which audio watermarking information is embedded and extracts a speech at each estimated pitch mark;

    the phase extractor extracts a phase of the speech extracted by the pitch mark estimator;

    the representative phase calculator calculates a representative phase to be a representative of a plurality of frequency bins from the phase extracted by the phase extractor; and

    the determination unit determines, based on the representative phase, whether the audio watermarking information exists in the synthesized speech.

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