🎉 Cool-chic 3.4: 30% less complex! 🎉
This release introduces a new upsampling of the latent variables bringing compression gain. It also allows to rely on smaller Auto-Regressive Modules, lowering the overall decoder complexity significantly.
- New and improved latent upsampling module
- Leverage symmetric and separable convolution kernels to reduce complexity & parameters count
- Learn two filters per upsampling step instead of one for all upsampling steps
- 1% to 5% rate reduction for the same image quality
- 30% complexity reduction using a smaller Auto-Regressive Module
- From 2000 MAC / decoded pixel to 1300 MAC / decoded pixel
- 10% faster decoding speed
Compression performance
| BD-rate of Cool-chic 3.4 vs. [%] | Avg. decoder complexity | |||||||
|---|---|---|---|---|---|---|---|---|
| Cheng | ELIC | Cool-chic 3.3 | C3 | HEVC (HM 16) | VVC (VTM 19) | MAC / pixel | CPU Time [ms] | |
| kodak | -4.2 % | +7.5 % | -0.9 % | -4.3 % | -17.2 % | +3.4 % | 1303 | 74 |
| clic20-pro-valid | -13.2 % | -0.2 % | -0.3 % | -1.3 % | -25.1 % | -2.3 % |
1357 | 354 |
| jvet | / | / | -0.2 % | / | -18.3 % | +18.6 % | 1249 | 143 |
Kodak
CLIC20 Pro Valid
JVET Class B
