Difference between revisions of "CELT TODO"

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*** fine offset
 
*** fine offset
 
** Spreading/folding parameter
 
** Spreading/folding parameter
 +
 +
* Transients
 +
** Energy weighting pre- or post-normalization
 +
** Include energy shape?
 +
** Partial remixing of short blocks?
  
 
== Other decisions to make ==
 
== Other decisions to make ==
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* Dynamic allocation
 
* Dynamic allocation
 
* Better stereo coupling
 
* Better stereo coupling
* Investigate other transient algorithms
 
** Energy weighting pre- or post-normalization
 
** Include energy shape
 

Revision as of 17:36, 14 April 2010

Open issues

  • Spreading/folding
    • Uniform quantisation
    • Control over the amount of spreading/folding introduced
    • Make it have the same shape as the rest of the spectrum
  • Tuning
    • Band layout (spacing)
    • Bit allocation
      • Main table
      • Stereo
      • qtheta offset
      • fine offset
    • Spreading/folding parameter
  • Transients
    • Energy weighting pre- or post-normalization
    • Include energy shape?
    • Partial remixing of short blocks?

Other decisions to make

  • Should we use raw bits or now?
  • 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?

"Research topics"

  • Dynamic allocation
  • Better stereo coupling