High MLD for MC 5.1 Decoder at 192kbps JBM decoding to BINAURAL_ROOM_REVERB

Basic info

• Float reference:
  • Encoder (float): db364042
  • Decoder (float): db364042
• Fixed point:
  • Encoder (fixed): 6c320724
  • Decoder (fixed): 6c320724

Bug description

Decoding the provided bitstream results in a high MLD of 57 for fixed point. Observing the output signals, a clear energy fluctuation for fixed point is evident w.r.t. float.

Float:

Fixed:

Ways to reproduce

Box folder: ...\Box_EXTERNAL_IVAS_BASOP_VERIFICATION\issues\issue-1794

./IVAS_dec -voip binaural_room_reverb 32 bit out.wav

The unmodified bitstream has also been uploaded. Decoding this only results in an MLD of 1.2, indicating an issue in the JBM path.