Multiple MP3 compression detection based on the statistical properties of scale factors

Abstract

MP3 audio is one of the most popular audio formats, and it is easy to be tampered. By revealing the historical traces of the audio compression, it could be speculated effectively whether the suspicious MP3 audio has been tampered or not. Scale factor is an important parameter in MP3 encoding. In this paper, the variation law of the scale factor with various times of the compression is discovered by analyzing its statistical properties. The proposed method can be applied to detect multiple compression operations when the bit rates of the second and third compression are the same. The experimental results show that the proposed approach has good performance and higher accuracy with respect to the state-of-art.