2014 Fiscal Year Final Research Report
Studies on high-quality and fast-convergence stereophonic echo cancellation
| Project/Area Number |
24560446
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Communication/Network engineering
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| Research Institution | Kanazawa University |
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Principal Investigator |
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| Project Period (FY) |
2012-04-01 – 2015-03-31
|
| Keywords | 信号処理 / エコーキャンセラ / 前処理 / 並列処理 |
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| Outline of Final Research Achievements |
As fast convergence algorithms for stereophonic acoustiv echo cancellation, two pre-processing filters are studied. In pre-processing filters using multiple all-pass filters (APFs), the anglular frequency and the radius of the pole periodically controled one after the other. Pre-processing filters using multiple FIR filters are also studied. Sub-sample inter-channel delay difference maximizes the convergence speed. Combination with non-linear pre-processors are also examined. Subjective test results show the improved sound quality. Parallel and effective implementation of echo cancellers by using CUDA or OpenCL is also studied.
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| Free Research Field |
工学
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