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KMID : 0917520040110020181
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Journal of Speech Sciences
2004 Volume.11 No. 2 p.181 ~ p.192
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Speech Interactive Agent on Car Navigation System Using Embedded ASR/DSR/TTS
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Lee Heung-Kyu
Kwon Oh-Il
Ko Han-Seok
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Abstract
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This paper presents an efficient speech interactive agent rendering smooth car navigation and Telematics services, by employing embedded automatic speech recognition (ASR), distributed speech recognition (DSR) and text-to-speech (ITS) modules, all while enabling safe driving. A speech interactive agent is essentially a conversational tool providing command and control functions to drivers such’ as enabling navigation task, audio/video manipulation, and E-commerce services through natural voice/response interactions between user and interface. While the benefits of automatic speech recognition and speech synthesizer have become well known, involved hardware resources are often limited and internal communication protocols are complex to achieve real time responses. As a result, performance degradation always exists in the embedded H/W system. To implement the speech interactive agent to accommodate the demands of user commands in real time, we propose to optimize the hardware dependent architectural codes for speed-up. In particular, we propose to provide a composite solution through memory reconfiguration and efficient arithmetic operation conversion, as well as invoking an effective out-of-vocabulary rejection algorithm, all made suitable for system operation under limited resources.
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KEYWORD
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speech interactive agent, embedded ASR, embedded TTS
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