High MLD for ParamMC at 80 kbps - signal distributed to incorrect channels

Basic info

• Float reference:
  • Encoder (float): 5067d70d
  • Decoder (float): 5067d70d
• Fixed point:
  • Encoder (fixed): f5041511
  • Decoder (fixed):

Bug description

Probably related to #1262 (closed).

The fixed point encoded bitstream contains content in differing channels from the input, leading to a very high MLD of 28.60.

Float reference output:

Fixed point encoder:

As can be seen highlighted for 2.0-2.6 seconds of the signal, energy originally in channel 3 ends up in the rest of the channels as well for the fixed point output. This can be observed over multiple parts of the rest of the signal. Possibly indicates an issue with the reconstruction of the output channels from the transport channels.

Ways to reproduce

Input vector has been uploaded.

Box folder: ...\Box_EXTERNAL_IVAS_BASOP_VERIFICATION\issues\issue-1268

./IVAS_cod_fx -mc 5_1 -max_band WB 80000 16 am2aa1s06_16.10dB.wav bit
./IVAS_dec_flt_ref 5_1 16 bit out.wav