| US 7,596,496 B2 | ||
| Voice activity detection apparatus and method | ||
| Firas Jabloun, Cambridge (United Kingdom) | ||
| Assigned to Kabuhsiki Kaisha Toshiba, Tokyo (Japan) | ||
| Filed on May 08, 2006, as Appl. No. 11/429,308. | ||
| Claims priority of application No. 0509415.6 (GB), filed on May 09, 2005. | ||
| Prior Publication US 2006/0253283 A1, Nov. 09, 2006 | ||
| Int. Cl. G10L 15/20 (2006.01); G10L 21/02 (2006.01); G10L 15/00 (2006.01) | ||
| U.S. Cl. 704—233 [704/226; 704/240] | 16 Claims |
| 1. A voice activity detection method comprising the steps of:
(a) Estimating in a noise power estimator a noise power within a signal having a speech component and a noise component; and
(b) Calculating a likelihood ratio for a presence of speech in the signal from the estimated power of noise signals from step
(a) and from a complex Gaussian statistical model,
wherein the estimated power of the noise signals is calculated independently of the likelihood ratio.
|