Fundamentals of speech recognition
Fundamentals of speech recognition
Digital signal processing (3rd ed.): principles, algorithms, and applications
Digital signal processing (3rd ed.): principles, algorithms, and applications
Fault-tolerant computer system design
Fault-tolerant computer system design
Discrete Time Processing of Speech Signals
Discrete Time Processing of Speech Signals
A New On-Line Robust Approach to Design Noise-Immune Speech Recognition Systems
Journal of Electronic Testing: Theory and Applications
Soft-Error Detection through Software Fault-Tolerance Techniques
DFT '99 Proceedings of the 14th International Symposium on Defect and Fault-Tolerance in VLSI Systems
Hybrid Soft Error Detection by Means of Infrastructure IP Cores
IOLTS '04 Proceedings of the International On-Line Testing Symposium, 10th IEEE
A FPGA-based Viterbi algorithm implementation for speech recognition systems
ICASSP '01 Proceedings of the Acoustics, Speech, and Signal Processing, 200. on IEEE International Conference - Volume 02
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Hereafter, we present an approach aiming to improve the reliability of digital signal processing (DSP) systems operating in real noisy (electromagnetic interference—EMI) environments. The approach is based on the coupling of two techniques: the “DSP-oriented signal integrity improvement” technique deals with increasing the signal-to-noise ratio (SNR) and is essentially a modification of the classic Recovery Blocks Scheme. The second technique, named “SW-based fault handling” aims to detect in real-time data- and control-flow faults throughout modifications of the processor code. When compared to conventional approaches using Fast Fourier Transform (FFT) and Hamming Code, the primary benefit of such an approach is to improve system reliability by means of a considerably low complexity, reasonably low performance degradation and, when implemented in hardware, with reduced area overhead. Aiming to illustrate the proposed approach, we implemented a HW/SW prototype to operate as a speech recognition system (SRS). This prototype was tested under a home-tailored EMI environment according to the IEC 61000-4-29 International Standard Normative. The obtained results indicate that the proposed approach can effectively improve the reliability of DSP systems operating in real noise (EMI) environments.