Apparatus and method for preprocessing of speech signal

摘要

PURPOSE: A voice signal pre-processing device and a method thereof are provided to interpolate and restore a voice signal whose size is abnormal under mobile environments, thereby increasing performance of recognizing a voice. CONSTITUTION: A voiced sound section detecting unit(120) detects a voiced sound section including a voiced sound signal from a voice section. A pre-processing method determining unit(140) detects a clipping signal which is generated during the voiced sound section. A clipping signal processing unit(160) extracts a signal sample close to the clipping signal. The clipping signal processing unit interpolates the clipping signal by using the signal sample.