Recursive restoration of pitch variation defects in musical recordings

A new algorithm is presented for the identification and restoration of time-varying pitch defects in audio signals. The problem is commonly encountered as 'wow' in gramophone disc and magnetic tape recordings where motor speed variations or eccentricity in the recording process are significant. The algorithm operates in two stages, the first of which tracks tonal components in musical signals to generate a single pitch variation curve, and the second stage which performs restoration as a time-varying resampling operation. Results are presented from both artificially degraded sources and real sources.<<ETX>>

[1]  Lawrence R. Rabiner,et al.  Digital Techniques for Changing the Sampling Rate of a Signal , 1982 .

[2]  Simon J. Godsill,et al.  The restoration of degraded audio signals , 1993 .

[3]  L. Cohen,et al.  Time-frequency distributions-a review , 1989, Proc. IEEE.

[4]  S. Haykin,et al.  Adaptive Filter Theory , 1986 .

[5]  Edmund Taylor Whittaker.  On a New Method of Graduation , 1922, Proceedings of the Edinburgh Mathematical Society.

[6]  Thomas F. Quatieri,et al.  Speech analysis/Synthesis based on a sinusoidal representation , 1986, IEEE Trans. Acoust. Speech Signal Process..

[7]  J. Makhoul,et al.  Linear prediction: A tutorial review , 1975, Proceedings of the IEEE.

[8]  Gwilym M. Jenkins,et al.  Time series analysis, forecasting and control , 1972 .

[9]  U.R. Furst.  Periodic Variations of Pitch in Sound Reproduction by Phonographs , 1946, Proceedings of the IRE.

[10]  Simon J. Godsill,et al.  The restoration of pitch variation defects in gramophone recordings , 1993, Proceedings of IEEE Workshop on Applications of Signal Processing to Audio and Acoustics.

[11]  P. E. Axon,et al.  A study of frequency fluctuations in sound recording and reproducing systems , 1949 .