Elements of information theory
Elements of information theory
An introduction to signal detection and estimation (2nd ed.)
An introduction to signal detection and estimation (2nd ed.)
Proceedings of the First International Workshop on Information Hiding
Attacks on Copyright Marking Systems
Proceedings of the Second International Workshop on Information Hiding
An Analysis of One of the SDMI Candidates
IHW '01 Proceedings of the 4th International Workshop on Information Hiding
Reading between the lines: lessons from the SDMI challenge
SSYM'01 Proceedings of the 10th conference on USENIX Security Symposium - Volume 10
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Echo hiding is a method of hiding information in an audio clip by the addition of embedding imperceptible echoes. The echoes are detected by various methods, including autocorrelation and cepstral analysis. We treat echo hiding as general multiplicative embedding in the frequency domain, and derive appropriate detectors based on various statistical models of audio FFT coefficients. This results in several detectors that are both simpler and more powerful than cepstral detection. We also observe that detection by simple correlation in the log-spectral domain performs very well in contrast to much more complicated approaches.