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:
May. 14, 2013
Filed:
Dec. 23, 2004
Nobuhiko Naka, Yokohama, JP;
Tomoyuki Ohya, Yokohama, JP;
Nobuhiko Naka, Yokohama, JP;
Tomoyuki Ohya, Yokohama, JP;
NTT DoCoMo, Inc., Tokyo, JP;
Abstract
It is provided a voice activity decision apparatus capable of accurately performing the decision on the state being associated with a sound interval or a silence interval also in terms of the input signal having many aperiodic components and/or plural mixed different periodic components. The apparatuscomprises: an autocorrelation calculating unitfor calculating autocorrelation values of an input signal; a delay calculating unitfor calculating plural delays at which autocorrelation values calculated by the autocorrelation calculating unitbecome maximums; a noise deciding unitfor deciding whether the input signal is a noise or not based on the plurality of delays calculated by the delay calculating unit; and an activity decision unitfor performing the activity decision in terms of the input signal based on results of decision by the noise deciding unitand the input signal.