Core synthesis partly missing in ISM 1 at 24.4 kbps and 32 kbps
Basic info
Bug description
The fixed point encoder is not able to produce a decent synthesis for ISM-1 at 32 and 24.4 kbps. This also means that all mode using the core at 32 and 24.4 kbps ( or bitrates close to that) will suffer similar issues.
This issue has been first found using -force ACELP, but for the files showed below, it used normal command line (but likely the codec is choosing itself the ACELP part)
The image below shows from top to bottom:
- Floating point synthesis at 32 kbps
- Fixed point synthesis at 32 kbps
- Fixed point synthesis at 24.4 kbps
Ways to reproduce
Input files located in box : issue-1089
IVAS_cod_flt -ISM 1 input.wav.0.csv 32000 48 input.wav bit.flt IVAS_cod_fx -ISM 1 input.wav.0.csv 32000 48 input.wav bit.fx
IVAS_dec_flt EXT 48 bit.flt syn.flt.wav IVAS_dec_flt EXT 48 bit.fx syn.fx.wav
(Clear steps or refer to a failing automated test, e.g. with a pipeline link)
Edited by vaillancour