Robust Time Difference Estimation for Unknown Microphone Positions with Reverberation
(2015) In Master's Theses in Mathematical Sciences FMA820 20151Mathematics (Faculty of Engineering)
- Abstract
- In this thesis a system is developed for robust time difference estimation for multiple microphones in reverberant environments, without any knowledge of the 3D positions of the microphones or the room. RANSAC is used to find line segments in sets of frames containing a number of the largest GCC-PHAT peaks. Focus is on real experiments with one moving sound source continuously playing music. The estimated time differences can be used to find the microphone positions, track the sound source, and estimate flat surfaces in the room. The system has been evaluated on real data with manually annotated ground truth in order to estimate the precision of the system in terms of true positives and false positives. The algorithms have also been... (More)
- In this thesis a system is developed for robust time difference estimation for multiple microphones in reverberant environments, without any knowledge of the 3D positions of the microphones or the room. RANSAC is used to find line segments in sets of frames containing a number of the largest GCC-PHAT peaks. Focus is on real experiments with one moving sound source continuously playing music. The estimated time differences can be used to find the microphone positions, track the sound source, and estimate flat surfaces in the room. The system has been evaluated on real data with manually annotated ground truth in order to estimate the precision of the system in terms of true positives and false positives. The algorithms have also been incorporated into a system that takes a number of sound files as input and produces the microphone positions, sound path motion and reverberant structures. The complete system has been evaluated on real data with promising results. (Less)
Please use this url to cite or link to this publication:
http://lup.lub.lu.se/student-papers/record/5276584
- author
- Segerblom Rex, Simon LU
- supervisor
-
- Karl Åström LU
- organization
- course
- FMA820 20151
- year
- 2015
- type
- H2 - Master's Degree (Two Years)
- subject
- keywords
- TDOA, RANSAC, GCC-PHAT, GCC, time difference, range difference, sound tracking
- publication/series
- Master's Theses in Mathematical Sciences
- report number
- LUTFMA-3271-2015
- ISSN
- 1404-6342
- other publication id
- 2015:E6
- language
- English
- id
- 5276584
- date added to LUP
- 2015-06-18 12:09:47
- date last changed
- 2015-06-18 12:09:47
@misc{5276584, abstract = {{In this thesis a system is developed for robust time difference estimation for multiple microphones in reverberant environments, without any knowledge of the 3D positions of the microphones or the room. RANSAC is used to find line segments in sets of frames containing a number of the largest GCC-PHAT peaks. Focus is on real experiments with one moving sound source continuously playing music. The estimated time differences can be used to find the microphone positions, track the sound source, and estimate flat surfaces in the room. The system has been evaluated on real data with manually annotated ground truth in order to estimate the precision of the system in terms of true positives and false positives. The algorithms have also been incorporated into a system that takes a number of sound files as input and produces the microphone positions, sound path motion and reverberant structures. The complete system has been evaluated on real data with promising results.}}, author = {{Segerblom Rex, Simon}}, issn = {{1404-6342}}, language = {{eng}}, note = {{Student Paper}}, series = {{Master's Theses in Mathematical Sciences}}, title = {{Robust Time Difference Estimation for Unknown Microphone Positions with Reverberation}}, year = {{2015}}, }