Energy issue during the first speech burst only at 24.4 and 32 kbps (ISM-1)
Basic info
Bug description
During the first speech burst, the energy of the synthesis is wrong. Could be a scaling issue or maybe a bitstream issue or something else, but it happens only at 24.4 and 32 kbps (ISM-1) and it happens only before the 1.5s, the rest of the file looks ok.
in the figure below, from top to bottom:
- Floating point synthesis
- Fixed point synthesis
- Difference signal
- Spectrum
Ways to reproduce
Input files on box issue-1096
IVAS_cod_flt -ISM 1 input.wav.0.csv 24400 48 input.wav bit.flt
IVAS_cod_fx -ISM 1 input.wav.0.csv 24400 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