The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 25, 2013
Filed:
Jan. 23, 2009
Yasuo Yoshioka, Hamamatsu, JP;
Yasuo Yoshioka, Hamamatsu, JP;
Yamaha Corporation, Hamamatsu-shi, JP;
Abstract
In a sound processing device, a modulation spectrum specifier specifies a modulation spectrum of an input sound for each of a plurality of unit intervals. An index calculator calculates an index value corresponding to a magnitude of components of modulation frequencies belonging to a predetermined range of the modulation spectrum. A determinator determines whether the input sound of each of the unit intervals is a vocal sound or a non-vocal sound based on the index value. The modulation spectrum specifier analyzes the input sound to obtain a cepstrum or a logarithmic spectrum of the input sound for each of a sequence of frames defined within the unit interval, then specifies a temporal trajectory of a specific component in the cepstrum or the logarithmic spectrum along the sequence of the frames for the unit interval, and performs a Fourier transform on the temporal trajectory throughout the unit interval to thereby specify the modulation spectrum of the unit interval as the result of the Fourier transform of the temporal trajectory.