Highly Nonlinear Approximations for Sparse Signal Representation

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Trigonometric Dictionary based Codec for Music Compression

TDCodec is the proof of concept of a codec for lossy compression of music signals. It uses a Trigonometric Dictionary, which has been shown to produce stunning sparse approximation of melodic music, if processed by the adequate greedy strategy Cooperative Greedy Pursuit Strategies

The codec falls within the usual transform coding scheme. It is designed to achieve high quality recovery.

The algorithm details are given in the paper:

"Trigonometric dictionary based codec for music compression with high quality recovery"
by Laura Rebollo-Neira

All the MATLAB routines for implementing TDCodec and reproducing the Table in the paper are available in the archive TDCodec_Web.zip.