T. Bianchi, A. D. Rosa, M. Fontani, Giovanni Rocciolo, A. Piva
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Detection and classification of double compressed MP3 audio tracks
In this paper, a method to detect the presence of double compression in a MP3 audio file is proposed. By exploiting the effect of double compression in the statistical properties of quantized MDCT coefficients, a single measure is derived to decide if a MP3 file is single compressed or it has been double compressed and also to devise the bit-rate of the first compression. Experimental results confirm the performance of the detector, mainly when the bit-rate of the second compression is higher than the bit-rate of the first one.
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