New matching pursuit based sinusoidal modelling method for audio coding

Abstract

A new method is proposed to improve sinusoidal modelling based on energy-adaptive matching pursuits. To reduce the complexity of the algorithm, an over-complete dictionary composed of complex exponentials is used and an efficient implementation is presented. An analysis–synthesis windows scheme that avoids overlapping is also proposed. For efficient quantisation of sinusoidal model parameters, a new algorithm that significantly reduces the side information required by the decoder is described. Experimental results show the excellent performance of the proposed method for sinusoidal modelling compared to some others that are integrated into multiparts models for low bit rate audio coding applications.