| Paper: | ITT-P1.4 | ||
| Session: | Speech and Language Applications | ||
| Time: | Thursday, May 20, 15:30 - 17:30 | ||
| Presentation: | Poster | ||
| Topic: | Industry Technology Track: Speech Recognition | ||
| Title: | EMBEDDED SPEECH RECOGNITION SYSTEM ON 8-BIT MCU CORE | ||
| Authors: | Dong Wang; Tsinghua University | ||
| Jia Liu; Tsinghua University | |||
| Rensheng Liu; Tsinghua University | |||
| Liang Zhang; Tsinghua University | |||
| Abstract: | This is a small vocabulary, speaker independent, discrete word speech recognition system based on the System On Chip (SOC) philosophy. It is implemented on an 8-bit MCU. The system adopts Linear Predictive Cepstral Coefficient (LPCC) related features followed by Vector Quantization (VQ) step as front end, and Hidden Marcov Model (HMM) as speech model. Confidence measure based on likelihood score (LLS) are given for rejection of Out-Of-Vacabulary (OOV) words. The recognition rate is improved with corrective training, and robustness is acquired by integrating confidence measure into the system. The recognition accuracy is nearly 97% with a vocabulary up to 30 phrases under normal conditions. Simple speech codec is also implemented for all speech I/O purpose. | ||
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