Difference between revisions of "CELT TODO"

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== Open issues ==
 
== Open issues ==
 
* <strike>Spreading/folding/strike>
 
** <strike>Uniform quantisation/strike>
 
** <strike>Control over the amount of spreading/folding introduced/strike>
 
** <strike>Make it have the same shape as the rest of the spectrum</strike>
 
  
 
* Tuning
 
* Tuning
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* Transients
 
* Transients
** Energy weighting pre- or post-normalization?
+
** Haar/Hadamard
** Include energy shape?
+
** Delta adjustment
 +
** Can we remove all of the old code?
 +
** Split below 32-bit
 
** Partial remixing of short blocks?
 
** Partial remixing of short blocks?
  
 
* Make split more efficient
 
* Make split more efficient
 +
** Support for LN=-1
  
 
* Minimise bits left after PVQ
 
* Minimise bits left after PVQ

Revision as of 17:20, 20 May 2010

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?