This paper presents an information hiding algorithm which can effectively resist compression attack in the encoding of speech communications. Experiments show that the algorithm can effectively resist the PCMA, PCMU, G722 voice compression coding and filtering operation, the audio remains strong robustness, carrying secret voice segment average SNR is close to 40dB, which has reach the transparency requirements. This algorithm is based on the energy difference between the band to hide the information. The algorithm has great practicality, which is simple and based on blind detection. The hidden capacity is 30bit/s. Embedded real-time adjustments to expressly speech in the process of embedding strength, to get the effect of hidden effects and decoding. In the process of embedding, through realtime adjustment of embedding strength for clear voice to gain good hiding and perfect decoding effects, Which can be good used in hidding some information in the wireless communications.
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