Patent Number: 6,490,554

Title: Speech detecting device and speech detecting method

Abstract: The invention relates to a voice activity detecting device and a voice activity detecting method. An object of the invention is to adapt to various characteristics of noise which may possibly be superimposed on an aural signal to thereby reliably discriminate between an active voice segment and a non-active voice segment. For this purpose, the voice activity detecting device comprises: a speech-segment inferring section 11 for determining the probability that each of active voice frames given in order of time sequence belongs to the active voice segment, based on the statistical characteristic of the aural signal; a quality monitoring section 12 for monitoring the quality of the aural signal for each active voice frame, and a speech-segment determining section 13 for weighting the determined probability with the above quality to obtain for each active voice frame the accuracy that the active voice frame belongs to the active voice segment.

Inventors: Endo; Kaori (Kawasaki, JP), Ota; Yasuji (Kawasaki, JP)

Assignee: Fujitsu Limited

International Classification: G10L 11/00 (20060101); G10L 19/00 (20060101); G10L 11/02 (20060101); G10L 011/02 ()

Expiration Date: 12/03/2019