DaalaTodo: Difference between revisions
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Martin.leese (talk | contribs) m (moved DaalaTodo to Daala To-do List: Call it what it is.) |
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= Simple Things = | = Simple Things = | ||
* Overflow checking for allocations in od_state_ref_imgs_init(). | * Overflow checking for allocations in od_state_ref_imgs_init(). | ||
= Tuning = | = Tuning = | ||
| Line 29: | Line 27: | ||
* Variable Framerate support | * Variable Framerate support | ||
* Dynamic frame size changes (without keyframes) | * Dynamic frame size changes (without keyframes) | ||
* SPIHT as k-tokenizer | |||
= Entropy coding = | = Entropy coding = | ||
| Line 36: | Line 35: | ||
* Better encoding of the CfL sign | * Better encoding of the CfL sign | ||
* Add SIMD to the decoder search | * Add SIMD to the decoder search | ||
= Visualization = | |||
* Add ability to display decoder side information to player_example | |||
** Block size split decision | |||
** Cost in bits per block (use log scale) | |||
** No-ref and skip flags | |||
** Mode information (if we signal intra) | |||
** Motion vectors | |||
** Display prediction residual | |||
** Show only one plane (Y, Cb, Cr) | |||
Revision as of 02:46, 14 October 2014
Simple Things
- Overflow checking for allocations in od_state_ref_imgs_init().
Tuning
- Quantization matrix
- Beta
- Inter band masking
- PVQ RDO
- Better MV cost estimates
- Better MC distortion metrics (SATD, some MSE/SATD hybrid, no-ref-aware, maybe table driven Theora-style, etc.)
- Better MV split flag rate estimates
Known broken/suboptimal
- Block size decision
- Never tuned on inter
- Not considering chroma
- Code quantizers on a log scale
- Re-order bitstream (e.g., don't code all MVs at the front, etc.)
- Investigate bias introduced by coefficient scaling
New work
- VQ for inter frames, with codebook selected based on dim m
- Motion vector "mask" based on previous frame
- Use coeff magnitude correlation for modelling
- Per SB/MB/block/something quantizer changes
- Variable Framerate support
- Dynamic frame size changes (without keyframes)
- SPIHT as k-tokenizer
Entropy coding
- Make the Laplace vector encoder (aka k-tokenizer) faster
- Add "skip-all remaining bands" flag
- Better encoding of the CfL sign
- Add SIMD to the decoder search
Visualization
- Add ability to display decoder side information to player_example
- Block size split decision
- Cost in bits per block (use log scale)
- No-ref and skip flags
- Mode information (if we signal intra)
- Motion vectors
- Display prediction residual
- Show only one plane (Y, Cb, Cr)