AERA Algorithm on Speech Hiding System
Bai Jian, Xiaojun Jing, Yinghui Xu, Xinxin Niu, Yang Yi-xian · Dianzi xuebao · 2005
This paper presents a speech-hiding algorithm-Analysis-By-Synthesis Energy Ratio Adjust Algorithm(AERAA) that can be deployed on Global System for Mobile Communications(GSM).The algorithm is based on the technique of Analysis-By-Synthesis(ABS) and can adjust adaptively the strength of the security information component according to public speech.The hiding capacity of the algorithm is 50 bits per second.After a lot of experiments,it is proved that this algorithm has strong robustness to many attacks such as Regular Pulse Excited-Long Term Prediction coding(RPE-LTP coding) on GSM,Adaptive Differential Pulse Code Modulation(ADPCM) compression and most of filters.The average Signal Noise Ratio(SNR) of the middle speech is above 37db,therefore the imperceptibility can be ensured.Moreover the algorithm is based on blind-detection,it is simple and effective.