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
  • Spreading/folding parameter

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
• Investigate other transient algorithms
  • Energy weighting pre- or post-normalization
  • Include energy shape