View Poll Results: Trends in VQ?

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  • VQ can be interesting rather only for theoretists

    0 0%
  • VQ will be widely used, but mainly in multimedia compressors

    2 100.00%
  • VQ will be popular in many fields of data compression

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Thread: Vector quantization - applications, improvements, trends?

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    Vector quantization - applications, improvements, trends?

    I would like to start a general thread about vector quantization, which seems a promising direction especially for multimedia compression.

    I know it is already used in Opus audio codec and is considered for AV1 video coded - any other compressors using it?
    A natural approach is PVQ (Pyramidal/Perceptual Vector Quantization - nice introduction: https://people.xiph.org/~jm/daala/pvq_demo/ ) - any other promising approaches?

    I have recently taken a closer look at PVQ and was able to reduce its mean-square error (MSE) usually by more than 10% thanks to replacing its projection with a more tunable one: https://www.dropbox.com/s/jgghkeov1swu53x/pvq.pdf
    Any other interesting improvements?

    And generally - do you think vector quantization is indeed a promising direction?
    For multimedia only or also for other types of data? Which ones?

    update: discussion with Jean-Marc Valin: https://groups.google.com/a/webmproj...el/4P9il8Pbb58
    Last edited by Jarek; 4th May 2017 at 00:10.

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