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On design and implementation of an embedded automatic speech recognition system

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4 Author(s)
Phadke, Sujay ; Dept. of Electr. Eng., Indian Inst. of Technol., Mumbai, India ; Limaye, R. ; Verma, S. ; Subramanian, K.

We present a new design of an Embedded Speech Recognition System. It combines the aspects of both hardware and software design to implement a speaker dependent, isolated word, small vocabulary speech recognition system. The feature extraction is based on modified Mel-scaled Frequency Cepstral Coefficients (MFCC) and template matching employs Dynamic Time Warping (DTW). A novel algorithm has been used to improve the detection of start of a word. The hardware is built around the industry standard TMS320LF2407A DSP. The board is designed to serve as a general purpose DSP development board for the 24X series of TI DSPs. It contains, apart from the DSP, the external SRAM, FLASH, ADC interface, I/O interfacing blocks and JTAG interface. Both the hardware and the software have been designed concurrently, with a view to achieve high-speed recognition with maximum accuracy in minimum power and making the device portable. The proposed solution is a low-cost, high-performance, scalable alternative to other existing products.

Published in:

VLSI Design, 2004. Proceedings. 17th International Conference on

Date of Conference:

2004

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