VOICE SIGNAL PRE-PROCESSING DEVICE, VOICE SIGNAL PROCESSING DEVICE, VOICE SIGNAL PRE-PROCESSING METHOD AND PROGRAM FOR VOICE SIGNAL PRE-PROCESSING

摘要

PROBLEM TO BE SOLVED: To effectively reduce external noise from various vibration sources. SOLUTION: The voice signal pre-processing device 10 including a first filter 20 for reducing noise and a second filter 22 for reducing noise, reduces a noise component by processing an electric signal including voice. Either of the first filter 20 or the second filter 22 is a coherent filter for reducing noise by coherent filtering, and the other is a non-coherent filter for reducing noise by non-coherent filtering, and the second filter 22 performs filtering of output of the first filter 20. COPYRIGHT: (C)2008,JPO&INPIT