Speech synthesizer, audio watermarking information detection apparatus, speech synthesizing method, audio watermarking information detection method, and computer program product
First Claim
Patent Images
1. A speech synthesizer comprising:
- a source generator configured to generate a source signal by using a fundamental frequency sequence and a pulse signal;
a phase modulator configured to modulate, 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; and
a vocal tract filter unit configured to generate 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.
1 Assignment
0 Petitions
Accused Products
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.
15 Citations
10 Claims
-
1. A speech synthesizer comprising:
-
a source generator configured to generate a source signal by using a fundamental frequency sequence and a pulse signal; a phase modulator configured to modulate, 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; and a vocal tract filter unit configured to generate 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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
-
9. A speech synthesizing method comprising:
-
generating a source signal by using a fundamental frequency sequence and a pulse signal; modulating, with respect to the generated source signal, a phase of the pulse signal at each pitch mark based on audio watermarking information; and generating 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.
-
-
10. A non-transitory computer readable recording medium for recording program to cause a computer to execute a speech synthesizing method in a computer, the method comprising the steps of:
-
generating a source signal by using a fundamental frequency sequence and a pulse signal; modulating, with respect to the generated source signal, a phase of the pulse signal at each pitch mark based on audio watermarking information; and generating 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.
-
Specification