In this letter, we present a decomposition for sinusoidal coding of audio, based on an amplitude modulation of sinusoids via a linear combination of arbitrary basis vectors. The proposed method, which incorporates a perceptual distortion measure, is based on a relaxation of a nonlinear least-squares minimization. Rate-distortion curves and listening tests show that, compared to a constant-amplitude sinusoidal coder, the proposed decomposition offers perceptually significant improvements in critical transient signals.
- amplitude modulation
- audio coding
- least mean squares methods
- nonlinear distortion
Christensen, M. G., Jakobsson, A., Andersen, S. V., & Jensen, S. H. (2006). Amplitude modulated sinusoidal signal decomposition for audio coding. IEEE Signal Processing Letters, 13(7), 389 - 392. https://doi.org/10.1109/LSP.2006.871856