CELT TODO

Open issues

• Enable new layout with more HF bands?
• Prevent errors at very low bit-rates
• Reduce waste when splitting at high bit-rate?
• Remove 2-phase stereo?
• fix start/end energy prediction
• Revert N=1 allocation special case?
• Revisit folding
  • Can we remove the need to fold on split?
  • Should we do L/R splitting?
  • Should we fold the side (probably not)?
  • Band-aligned folding?

• Tuning (nothing that really needs fixing, but it's still open)
  • Band layout (spacing)
  • qtheta offset
  • delta allocation
  • fine offset
  • Spreading/folding parameter