Voice detector
First Claim
Patent Images
1. A voice detector identifying a current input voice signal comprising:
- a long-term averaging circuit for calculating a long-term weighted average value of the current input voice signal;
a short-term averaging circuit for calculating a short-term weighted average value of the current input voice signal;
a level identification circuit for identifying a noise level based on the long-term weighted average value and the short-term weighted average value and outputting a discrimination level indicative of the identified noise level; and
a voice discriminator for comparing the long-term weighted average value with the discrimination level and determining whether the current input voice signal is a voiced term or an unvoiced term based on a result of the comparison.
1 Assignment
0 Petitions
Accused Products
Abstract
A voice detector that detects whether an input voice signal is voiced or unvoiced, the detector has a long-term averaging circuit calculating a long-term weighted average value, a short-term averaging circuit calculating a short-term weighted average value, a noise level discriminator discriminating based on the long-term weighted average value and the short-term weighted average value and a voice discriminator determining voiced/unvoiced terms based on comparison of the long-term weighted average value and the discriminated noise level.
30 Citations
10 Claims
-
1. A voice detector identifying a current input voice signal comprising:
-
a long-term averaging circuit for calculating a long-term weighted average value of the current input voice signal; a short-term averaging circuit for calculating a short-term weighted average value of the current input voice signal; a level identification circuit for identifying a noise level based on the long-term weighted average value and the short-term weighted average value and outputting a discrimination level indicative of the identified noise level; and a voice discriminator for comparing the long-term weighted average value with the discrimination level and determining whether the current input voice signal is a voiced term or an unvoiced term based on a result of the comparison. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
Specification