Harmonic Vector Quantization
Volodya Grancharov, Sigurdur Sverrisson, Erik Norvell, Tomas Toftgard, Jonas Svedberg, Harald Pobloth · 2015
Audio coding of harmonic signals is a challenging task for conventional MDCT coding schemes. In this paper we introduce a novel algorithm for improved transform coding of harmonic audio. The algorithm does not deploy the conventional scheme of splitting the input signal into a spectrum envelope and a residual, but models the spectral peak regions. The presented coding scheme is part of the recently standardized 3GPP EVS codec.