Abstract
Waveform audio (WAV) file is a widely used file format of uncompressed audio. With the rapid development of digital media technology, one can easily insert duplicated segments with powerful audio editing software, e.g. inserting a segment of audio with negative meaning into the existing audio file. The duplicated segments can change the meaning of the audio file totally. So for a WAV file to be used as evidence in legal proceedings and historical documents, it is very importance to identify if there are any duplicated segments in it. This paper proposes a method to detect duplicated segments in a WAV file. Our method is based on the similarity calculation between two different segments. Duplicated segments are prone to having similar audio waveform, i.e., a high similarity. We use fast convolution algorithm to calculate the similarity, which makes our method quit efficient. We calculate the similarity between any two different segments in a digital audio file and use the similarity to judge which segments are duplicated. Experimental results show the feasibility and efficiency of our method on detecting duplicated audio segments.
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Foundation item: the “12th Five-Year Plan” National Science and Technology Support Program (No. 2012BAK16B05)
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Xiao, Jn., Jia, Yz., Fu, Ed. et al. Audio authenticity: Duplicated audio segment detection in waveform audio file. J. Shanghai Jiaotong Univ. (Sci.) 19, 392–397 (2014). https://doi.org/10.1007/s12204-014-1515-5
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DOI: https://doi.org/10.1007/s12204-014-1515-5