Talk:Pyramid vector quantization

Improving uniformity by coordinate-wise power before projection

PVQ point density has characteristic nonuniformities - I have worked on improving it by adding some deformation, and just coordinate-wise power before applying projection works quite well, allows to reduce mean-squared quantization error by ~10% ( https://arxiv.org/pdf/1705.05285 ) - might be worth adding with image like attached:

Improving uniformity of PVQ point distribution by coordinate-wise power ${\vec {p}}\to {\vec {(p_{i}^{w})_{i}}}$ of the vector before projection. Diagram presents constellations for $N=3$ dimensions and written $K=11,16,23,32$ L1-norm.

--Jarek Duda (talk) 13:42, 15 May 2021 (UTC)