Automatic Floating-point to Fixed-point Conversion for Speech Recognition in Fixed-point DSP
Sungrack Yun, Chang D. Yoo · ITC-CSCC :International Technical Conference on Circuits Systems, Computers and Communications · 2007
This paper proposes a simple automatic conversion method from floating-point value operations to fixed-point value operations for implementing an automatic speech recognition (ASR) algorithm in fixed-point digital signal processor (DSP). The speech recognition algorithm requires very low floating-point value operations, and thus an underflow may occur. The proposed method uses two integers to compute very low floating-point values so that it prevents the underflow and satisfies the real-time processing with low cost.