Speech synthesizer, audio watermarking information detection apparatus, speech synthesizing method, audio watermarking information detection method, and computer program product
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United States of America Patent
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Jan 16, 2018
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app pub date -
Jul 16, 2015
filing date -
Jan 18, 2013
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Abstract
According to an embodiment, a speech synthesizer includes a source generator, a phase modulator, and a vocal tract filter unit. The source generator generates a source signal by using a fundamental frequency sequence and a pulse signal. The phase modulator modulates, with respect to the source signal generated by the source generator, a phase of the pulse signal at each pitch mark based on audio watermarking information. The vocal tract filter unit generates a speech signal by using a spectrum parameter sequence with respect to the source signal in which the phase of the pulse signal is modulated by the phase modulator.
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