Digital Technical Journal
Pattern Classification (2nd Edition)
Pattern Classification (2nd Edition)
Exposing digital forgeries in video by detecting double MPEG compression
MM&Sec '06 Proceedings of the 8th workshop on Multimedia and security
Digital Watermarking and Steganography
Digital Watermarking and Steganography
Cryptography and Network Security: Principles and Practice
Cryptography and Network Security: Principles and Practice
Statistical tools for digital forensics
IH'04 Proceedings of the 6th international conference on Information Hiding
Detection of Double-Compression in JPEG Images for Applications in Steganography
IEEE Transactions on Information Forensics and Security
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Prior works on re-quantization detection were mainly focused on still images and videos, implying that the involved quantization is uniform. In this paper, we examine non-uniform re-quantization, and then investigate the automatic detection of re-compressed speech signals. Based on Fisher Linear Discriminant (FLD), two detection algorithms are described in the time-domain and in the DFT-domain respectively. Comparative experiments indicate that both detection algorithms produce reliable results with AUC values higher than 0.9744 for a set of different experimental setups. In general, time-domain detection performs slightly better than DFT-domain detection. However, the latter is superior in the less dimensionality of input vectors.