Steganalysis of Analysis-by-Synthesis Compressed Speech

In this paper a steganalysis method for analysis-by-synthesis (AbS) compressed speech is proposed. In the steganalysis method, the probability difference of 0 and 1 and five statistics, including sum of histogram local flatness, sum of histogram local extremum difference, sum of histogram local variance, sum of histogram characteristic function, are used as distinguishing features. SVM classifiers are employed to discriminate stego speech from cover speech. For the example of steganalysis to speech compressed by G.729 algorithm, experiment results show the proposed algorithm has good performance.