A Frequency Double-Talk Detection Combined with the GMDF Adaptive Filter
碩士 === 元智大學 === 電機工程學系 === 94 === The main purpose of this thesis is about a frequency Double-talk detection combined with the GMDF adaptive filter processed the acoustic echo problem in hands free communication system. The proposed Double-talk detector in time domain and frequency domain include a...
| Main Authors: | , |
|---|---|
| Other Authors: | |
| Format: | Others |
| Language: | zh-TW |
| Published: |
2006
|
| Online Access: | http://ndltd.ncl.edu.tw/handle/17792205388892814892 |
| Summary: | 碩士 === 元智大學 === 電機工程學系 === 94 === The main purpose of this thesis is about a frequency Double-talk detection combined with the GMDF adaptive filter processed the acoustic echo problem in hands free communication system. The proposed Double-talk detector in time domain and frequency domain include a near-end speech detector and an auxiliary filter two kinds of structure. Among them have the best result with the Double-talk detection in the frequency domain. The detector used L subfilters that show extremely tight and severe to differentiate between double talk and single talk. Therefore, this detection differentiated between echo and near-end speech efficiently. This thesis also presents some methods observed convergence characteristic of adaptive filter in time-variant systems.
|
|---|