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| | {{Obsolete|The CELT codec has been merged into the IETF [[Opus]] codec and is now obsolete}} |
| == Open issues == | | == Open issues == |
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| * Spreading/folding | | == Post-freeze == |
| ** Uniform quantisation | | * VBR waste prevention |
| ** Control over the amount of spreading/folding introduced | | * More intelligent VBR decisions |
| ** Make it have the same shape as the rest of the spectrum
| | * Denorm prevention |
| | * Ogg mapping (including >2ch; LM/ch switching) |
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| * Tuning
| | [[Category:Opus]] |
| ** Band layout (spacing)
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| ** Bit allocation
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| ** Spreading/folding parameter
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| == Other decisions to make ==
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| * Should we use raw bits or now?
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| * What should we do about remaining bits after the last PVQ?
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| ** more fine energy?
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| ** encode bands backward?
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| ** allow "fractional pulses"
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| ==Old TODO list==
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| * raw bits
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| * <strike>Use the last bits after PVQ (for fine energy?)</strike>
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| * adaptive folding
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| ** finalize folding details
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| ** Decide on folding gain
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| * dynamic allocation
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| * <strike>Using PVQ for coarse energy?</strike>
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| * configuration packet
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| * revisit stereo coupling
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| * stereo allocation
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| * tune everything
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| * <strike>increase max pulses</strike>
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| ** <strike>more pulses for N>5</strike>
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| ** <strike>Fast CWRS for N=3</strike>
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| ** <strike>change if(_n<=6) to if(_n<=6 || _m>255) in ncwrs_u32</strike>
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| ** <strike>Use real limits in fits_in32()</strike>
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| * Tune for lower sampling rates
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| * <strike>Improve dynamic range by changing the energy floor</strike>
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| * <strike>Laplace encoder</strike>
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| ** <strike>Make ft=32768 to save some divisions</strike>
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| ** <strike>Use the last symbols to have a wider range</strike>
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| * Investigate other transient algorithms
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| ** <strike>energy weight</strike>
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