Patent · US Active

Method and system for identifying speech sound and non-speech sound in an environment

US7809560B2 · kind B2 · utility

8Cited by

3References

8Claims

0Family size

Assignee

PANASONIC HOLDINGS CORPORATION · JP

Inventors

Chia-Shin Yen · Taipei, TW
Chien-Ming Wu · Hengshan, TW
Che-Ming Lin · Tian'an, CN

Key dates

Filing date	Jan 26, 2006
Grant date	Oct 5, 2010
Priority date	—
Expiry date	Jan 27, 2028

Classification

Technology area (CPC G)Physics
CPC primaryG10L21/0272
WIPO fieldComputer technology
WIPO sectorElectrical engineering

Abstract

In a method and system for identifying speech sound and non-speech sound in an environment, a speech signal and other non-speech signals are identified from a mixed sound source having a plurality of channels. The method includes the following steps: (a) using a blind source separation (BSS) unit to separate the mixed sound source into a plurality of sound signals; (b) storing spectrum of each of the sound signals; (c) calculating spectrum fluctuation of each of the sound signals in accordance with stored past spectrum information and current spectrum information sent from the blind source separation unit; and (d) identifying one of the sound signals that has a largest spectrum fluctuation as the speech signal.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.