下載電子全文宣告This thesis is authorized to indicate in-campus access only
You can not download at the moment.
Your IP address is 184.108.40.206
The defense date of the thesis is 2010-09-06
The current date is 2019-05-23
This thesis will be accessible at off-campus not accessible
URN etd-0906110-153222 Statistics This thesis had been viewed 2238 times. Download 7 times. Author Shih-Hsiang Shao Author's Email Address email@example.com Department Communication Engineering Year 2009 Semester 2 Degree Master Type of Document Master's Thesis Language zh-TW.Big5 Chinese Page Count 87 Title ANALYSIS OF ACOUSTIC ECHO CANCELLATION FOR HANDS-FREE WEB PHONE Keyword WEB PHONE ECHO ACOUSTIC ACOUSTIC ECHO WEB PHONE Abstract This is an information and digital era. Many technology products are improved. However audio and speech process are important focus. Research directions include speech coding, speech recognition, acoustic echo cancellation (AEC), and double talk detection (DTD) in an AEC system. The latter two of are the focus discussed in this paper.
Early technology is not yet matured. The echo in communication may cause severe problem on the perceptual quality. So adaptive filter and suitable AEC algorithm jointly become particularly important. Since there are so many echo cancellation algorithms, which one is the most beneficial is what this paper concerned. Using the MATLAB as simulation program, this research applied three acoustic echo cancellation algorithms and one double talk detection algorithm. We investigate a variety of conditions including the AEC convergence rate, the perceptual quality and computational complexity, so that we can provide useful information in algorithms selection.
Advisor Committee Ching-Kuen Lee - advisor
Chau-Yun Hsu - co-chair
Yuan Tzu Ting - co-chair
Files Date of Defense 2010-07-24 Date of Submission 2010-09-06