Sökning: "block-sparsity"

Hittade 1 avhandling innehållade ordet block-sparsity.

  1. 1. Sparse Modeling of Grouped Line Spectra

    Detta är en avhandling från Centre for Mathematical Sciences, Lund University

    Författare :Ted Kronvall; Lunds universitet.; Lund University.; Lund University.; [2015]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; line spectra; parameter estimation; convex optimization; group-sparsity; block-sparsity; dictionary learning; ADMM; adaptive penalty; total variation; multi-pitch estimation; chroma; audio processing; TDOA; near-field localization; amplitude modulation;

    Sammanfattning : This licentiate thesis focuses on clustered parametric models for estimation of line spectra, when the spectral content of a signal source is assumed to exhibit some form of grouping. Different from previous parametric approaches, which generally require explicit knowledge of the model orders, this thesis exploits sparse modeling, where the orders are implicitly chosen. LÄS MER