发明名称 |
Voice activity detection method and apparatus using the same |
摘要 |
A method for detecting the presence of voice, single tone and dual tone signals compares a ratio r which equals the square of the maximum value of the received signal (A max) during a sampling period divided by a measure E of the energy to three different thresholds. If r is less than the first threshold (3), a single tone is indicated. If it is greater than the first but less than the second, the received signal level is compared to the third threshold (-43 dB) and receipt of a voice signal is indicted if the level of the received signal exceeds this threshold.
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申请公布号 |
US5619565(A) |
申请公布日期 |
1997.04.08 |
申请号 |
US19960598294 |
申请日期 |
1996.02.08 |
申请人 |
INTERNATIONAL BUSINESS MACHINES CORPORATION |
发明人 |
CESARO, CLAUDE;RICHTER, GERARD |
分类号 |
H04M3/22;G10L11/02;H04Q1/46;(IPC1-7):H04M1/00 |
主分类号 |
H04M3/22 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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