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Wow defect reduction based on interpolation techniques

Maziewski P.

Bulletin of the Polish Academy of Sciences. Technical Sciences

2006

Vol. 54, nr 4

469-477

In this paper the capacity of non-uniform sampling rate conversion techniques, invo1ving different interpolation methods, aimed at wow defect reduction, is examined. Involved are: linear interpolation, tour po1ynomial-based interpolation methods and the windowed sincbased method. The examined polynomial methods are: Lagrange interpolation, polynomial fitting with additional noise reduction, Hermitan and Spline. The performance of an artificially distorted audio signal, restored using non-uniform resampling, is evaluated on the basis of standard audio defect measurement criteria and compared for all of the aforementioned interpolation methods. The chosen defect descriptors are: total harmonic distortion, total harmonic distortion plus noise and signal to noise ratio.