Method and apparatus for extracting pitch information from...

Data processing: speech signal processing – linguistics – language – Speech signal processing – For storage or transmission

Reexamination Certificate

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C704S211000

Reexamination Certificate

active

07822600

ABSTRACT:
A function of improving accuracy of the extraction of pitch information in an audio signal including voice and sound signals is implemented. To do this, a morphological operation is used. In detail, an input audio signal is converted to an audio signal in a frequency domain, an optimum structuring set size (SSS) is determined, and a morphological operation is performed using the determined SSS. Then, by extracting the highest peak from a signal obtained through a predetermined fold and summation process as pitch information, the pitch information can be used in all audio systems in the latter part when voice coding, recognition, synthesis, and/or robustness are performed.

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