| Autor: |
Ye, Harvey, Whittington, Jim, Himawan, Ivan, Kleinschmidt, Tristan, Mason, Michael |
| Rok vydání: |
2009 |
| Předmět: |
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| Zdroj: |
AutoCRC Conference 2009 : Conference Proceedings |
| ISSN: |
2381-3652 |
| Popis: |
In an automotive environment, the performance of a speech recognition system is affected by environmental noise if the speech signal is acquired directly from a microphone. Speech enhancement techniques are therefore necessary to improve the speech recognition performance. In this paper, a field-programmable gate array (FPGA) implementation of dual-microphone delay-and-sum beamforming (DASB) for speech enhancement is presented. As the first step towards a cost-effective solution, the implementation described in this paper uses a relatively high-end FPGA device to facilitate the verification of various design strategies and parameters. Experimental results show that the proposed design can produce output waveforms close to those generated by a theoretical (floating-point) model with modest usage of FPGA resources. Speech recognition experiments are also conducted on enhanced in-car speech waveforms produced by the FPGA in order to compare recognition performance with the floating-point representation running on a PC. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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