New algorithm for detection of the wow distortion characteristic basing on the MTS pilot tracking is introduced. By observing a variation of the pilot frequency, the depth of the parasitic modulation can be estimated. MTS is an audio coding system used in an NTSC television standard, thus the algorithm is applicable only in that type of recordings. It is based on a high-frequency bias tracking algorithm and further modified to minimize the influence of an acoustic-band audio signals which may interfere with the 15.734 kHz MTS pilot tone.
Presented at 12th International Symposium on Sound and Vision Engineering and Mastering, Gdansk, Poland, (June 15-16, 2007).