基于TMS320VC5502的语音加扰系统设计

为提高通信对抗中语音干扰程度,设计并实现了一种电话语音加扰系统,核心处理器是TMS320VC5502,语音采集模块是TLV320AIC23B,语音控制模块是C8051F320和WT588D。该系统充分利用TMS320VC5502的高速处理数据的能力和MCU语音控制能力,从而满足复杂算法处理和语音干扰的实现。软件算法方面,针对语音干扰,提出了一种方法,即利用基于人耳听觉感知特性的MFCC提取语音特征参数,然后RASTA处理,最后利用欧氏距离找出相似语音进行干扰。与传统的噪声干扰相比,该系统具有实时性高、功耗低、体积小、重量轻、操作方便、干扰相关性好、可懂度低等特点,具有实际的应用价值。

Design of Speech Scrambling System Based on TMS320VC5502

In order to improve the speech interference of communication countermeasures,telephony scrambling system is designed and realized.The core processor is TMS320VC5502,the voice accquisition module is TLV320AIC23B,the voice control module is the C8051F320 and WT588D.With high-speed data processing capabilities of TMS320VC5502 and the MCU control capabilities,the system meets the implementations of the complex algorithm processing and speech interference.As for software algorithms,speech feature parameters are extracted by MFCC based on human auditory perception,and then RASTA is applied.Finally,the Euclidean distance is used to find similar voice to interference.With conventional algorithms,the results show that the system is of real-time,low power,small size,light weight,easy to operation,good correlation interference,intelligibility low,and has practical application value.