Title:
VOICE DETECTOR
Document Type and Number:
Japanese Patent JP3131716
Kind Code:
B2
Abstract:
PURPOSE: To sufficiently remove noise and to detect high quality voice by providing a digital filter part, noise cancelling function parts and an addition processing part for adding the digital output signals of the respective noise cancelling function parts.
CONSTITUTION: This detector is provided with the digital filter part 7 for respectively dividing digital first signals Df and digital second signals Ds into plural bands Za-Zc, the plural noise cancelling function parts 5a-5c corresponding to the respective bands and the addition processing part 8 for adding the digital output signals Doa-Doc of the respective noise cancelling function parts. Then, the voice including the noise is detected by a first microphone 2, also the noise 15 detected by a second microphone 3 and detection signals from the respective microphones 2 and 3 are respectively converted to the digital first signals Df and the digital second signals Ds by an analog/digital conversion processing part 4.
Inventors:
Satoru Kubota
Application Number:
JP13667893A
Publication Date:
February 05, 2001
Filing Date:
May 13, 1993
Export Citation:
Assignee:
Nagano Japan Radio Co., Ltd.
International Classes:
H04R1/40; H04R3/00; (IPC1-7): H04R3/00; H04R1/40
Domestic Patent References:
| JP3284098A | ||||
| JP3226200A |
Attorney, Agent or Firm:
Shigeru Shimoda