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. 02, 2015
Filed:
Nov. 22, 2011
Takaaki Yamabe, Yokohama, JP;
Takaaki Yamabe, Yokohama, JP;
JVC KENWOOD Corporation, Kanagawa-Ku, Yokohama-Shi, Kanagawa-Ken, JP;
Abstract
A signal portion per frame is extracted from an input signal, thus generating a per-frame signal. The per-frame signal in the time domain is converted into a per-frame signal in the frequency domain, thereby generating a spectral pattern of spectra. It is determined whether an energy ratio is higher than a threshold level. The energy ratio is a ratio of each spectral energy to subband energy in a subband that involves the spectrum. The subband is involved in subbands into which a frequency band is separated with a specific bandwidth. It is determined whether the per-frame signal is a speech segment, based on a result of the determination. Average energy is derived in the frequency direction for the spectra in the spectral pattern in each subband. Subband energy is derived per subband by averaging the average energy in the time domain.