A study of industrial strength of TSM watermarks

The purpose of this paper is to provide a method of verification for digital watermarks, based on removing the watermark with the help of another low quality audio track, lacking the watermark. We present results of a study on modern watermarking systems implemented in industry. The attack is based on the fact that we have little prior knowledge about the algorithm used on a certain watermarking scheme, with emphasis on the time scale modification method. The cross-correlation method represents the foundation of specific detection of the function used to dilate and contract the time space between two local extreme values.