Difference between revisions of "CELT TODO"

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* DTX/CNG
 
* DTX/CNG
 
* Reduce waste when splitting at high bit-rate?
 
* Reduce waste when splitting at high bit-rate?
* Revert N=1 allocation special case?
 
* Revisit folding
 
** Can we remove the need to fold on split?
 
** Should we do L/R folding?
 
** Should we fold the side (probably not)?
 
** Band-aligned folding?
 
 
   
 
   
 
== Tuning ==
 
== Tuning ==
Line 25: Line 19:
 
* Enable new layout with more HF bands
 
* Enable new layout with more HF bands
 
* Remove 2-phase stereo?
 
* Remove 2-phase stereo?
 +
* Revert N=1 allocation special case?
 +
* Revisit folding
 +
** Can we remove the need to fold on split?
 +
** Should we do L/R folding?
 +
** Should we fold the side (probably not)?
 +
** Band-aligned folding?

Revision as of 20:37, 14 January 2011

Open issues

  • Collapse avoidance
  • Stereo merge numerical issue with correlated mid/side
  • DTX/CNG
  • Reduce waste when splitting at high bit-rate?

Tuning

  • Temporal masking
  • 3-tap prefilter/postfilter
  • qtheta offset
  • Just in case (probably not needed)
    • delta allocation for non-transient
    • fine offset
    • Spreading/folding parameter
    • Band layout (spacing)

Still possible, but probably not a good idea

  • Enable new layout with more HF bands
  • Remove 2-phase stereo?
  • Revert N=1 allocation special case?
  • Revisit folding
    • Can we remove the need to fold on split?
    • Should we do L/R folding?
    • Should we fold the side (probably not)?
    • Band-aligned folding?