CELT TODO

From XiphWiki
Revision as of 13:56, 25 May 2010 by Jmspeex (talk | contribs)
Jump to: navigation, search

Open issues

  • Tuning
    • Band layout (spacing)
    • Bit allocation
      • Main table
      • Stereo
      • qtheta offset
      • fine offset
      • energy prediction parameters (means, decay)
    • Spreading/folding parameter
  • Transients
    • Haar/Hadamard
    • Delta adjustment
    • Can we remove all of the old code?
    • Split below 32-bit
    • Partial remixing of short blocks?
  • Make split more efficient
    • Support for LN=-1
  • Minimise bits left after PVQ
    • Reverse band ordering?
    • Fractional pulses?
  • Dynamic allocation
    • Include a way to deviate from the normal bit allocation?
  • Better stereo coupling
    • Better support for "intensity stereo"?

Other decisions to make

* Should we use raw bits or not?

  • What should we do about remaining bits after the last PVQ?
    • more fine energy?
    • encode bands backward?
    • allow "fractional pulses"
  • Include a configuration packet for more flexibility? (probably not)

* Use a min width for ebands that's equal to the number of short blocks?