Hyperbolically-warped cepstral coefficients for improved micro-Doppler classification

B. Erol, S. Gurbuz
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引用次数: 4

Abstract

Mel-frequency cepstrum coefficients (MFCC) have been used in many recent works as features for micro-Doppler classification. Originally proposed as features for speech recognition, the filter bank applied as part of the computation of the MFCC is designed with spacing according to the mel-frequency scale - a scale based upon the auditory properties of the human ear. However, the frequency composition of micro-Doppler signatures is completely unrelated to the mel-frequency scale. In this work, an alternative set of features computed using a filter bank based on a hyperbolically-warped frequency scale is proposed. A 21.25% increase in the correct classification rate of running, walking, creeping, and crawling is obtained when the proposed hyperbolically-warped cepstral coefficients (HWCC) are used as opposed to MFCC.
改进微多普勒分类的双曲扭曲倒谱系数
Mel-frequency倒频谱系数(MFCC)作为微多普勒分类的特征在最近的许多研究中得到应用。最初是作为语音识别的特征提出的,作为MFCC计算一部分的滤波器组是根据mel-frequency尺度(一种基于人耳听觉特性的尺度)设计间隔的。然而,微多普勒特征的频率组成与梅尔频率尺度完全无关。在这项工作中,提出了一种使用基于双曲线扭曲频率尺度的滤波器组计算的替代特征集。与MFCC相比,采用双曲扭曲倒谱系数(HWCC)对跑步、行走、爬行和爬行的正确分类率提高了21.25%。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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