Stereo Decoder: LP-CNG Highband missing/attenuated

Basic info

  • Fixed point:
    • Encoder (fixed): n/a
    • Decoder (fixed): c14667cd

Bug description

This is a follow-up to #2380 (closed): With the regression from #2380 (closed) fixed, there is still an issue in the BASOP decoder compared to floating-point: The LP-CNG highband is apparently missing or strongly attenuated at one spot:

BASOP:

Bildschirmfoto 2026-02-03 um 15.58.29.png

Float:

Bildschirmfoto 2026-02-03 um 15.58.36.png

Ways to reproduce

Bitstream:

bit.zip

IVAS_dec stereo 16 bit.192 out.wav