CELT TODO

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
    • energy prediction parameters (means, decay)
  • Spreading/folding parameter

• Transients
  • Energy weighting pre- or post-normalization
  • Include energy shape?
  • Partial remixing of short blocks?

• 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?