Analysis and enhancement of locally harmonic signals using adaptive multi-kernel methods

This paper is concerned with the analysis/synthesis and enhancement of signals that can be efficiently modeled as “quasi-harmonic”. We first provide a formal definition of quasi-harmonic signals and show that known estimation methods for such signals can be interpreted in a non-parametric local approximation framework. We then investigate the possibility of using “adaptive multi-kernel” estimation methods for which the duration of the analysis frame is tuned independently for each harmonic depending on the local behavior of the signal