Difference between revisions of "DaalaTodo"

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m (moved DaalaTodo to Daala To-do List: Call it what it is.)
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Revision as of 06:49, 8 October 2014

Simple Things

  • Overflow checking for allocations in od_state_ref_imgs_init().


Tuning

  • Quantization matrix
  • Beta
  • Inter band masking
  • PVQ RDO
  • Better MV cost estimates
  • Better MC distortion metrics (SATD, some MSE/SATD hybrid, no-ref-aware, maybe table driven Theora-style, etc.)
  • Better MV split flag rate estimates

Known broken/suboptimal

  • Block size decision
    • Never tuned on inter
    • Not considering chroma
  • Code quantizers on a log scale
  • Re-order bitstream (e.g., don't code all MVs at the front, etc.)
  • Investigate bias introduced by coefficient scaling

New work

  • VQ for inter frames, with codebook selected based on dim m
  • Motion vector "mask" based on previous frame
  • Use coeff magnitude correlation for modelling
  • Per SB/MB/block/something quantizer changes
  • Variable Framerate support
  • Dynamic frame size changes (without keyframes)

Entropy coding

  • Make the Laplace vector encoder (aka k-tokenizer) faster
  • Add "skip-all remaining bands" flag
  • Better encoding of the CfL sign
  • Add SIMD to the decoder search