Talk:Pyramid vector quantization

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Improving uniformity by coordinate-wise power before projection

Latest comment: 3 years ago1 comment1 person in discussion

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)Reply

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