A switched-capacitor preprocessor for speech recognition |
| |
| Authors: | Yoshihiko Horio Shogo Nakamura Hiroyuki Takase |
| |
| Affiliation: | (1) Department of Electronic Engineering, Tokyo Denki University 2-2, Kanda-Nishiki-cho, Chiyoda-ku, 101 Tokyo, Japan;(2) Engineering Computer Department, Computer Works, Mitsubishi Electric Corporation 325, Kamimachiya, 247 Kamakura, Kanagawa, Japan |
| |
| Abstract: | A switched-capacitor (SC) preprocessing system (preprocessor) which extracts and emphasizes the local peaks of the spectrum in real time is proposed for speech recognition systems. Main components of the system are a specially designed bandpass filter bank, a low-pass decimation filter bank, two-dimensional local peak extraction (LPE) filters, and a LPE filter selection circuit. Furthermore, a SC cascaded integrator-comb filter design technique is proposed to realize the decimation low-pass filter and the LPE filter. Finally, the system is tested by using two speech recognition systems. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
