[regression-merge] SBA Decoder rendering to BINAURAL/BINAURAL_ROOM_IR - max. abs. diff regression BASOP vs. Float

Basic info

• Float reference (new): Branch kiene/float-pc-clone-for-merge
  • Encoder (float): 92d4831d
  • Decoder (float): 92d4831d
• Float reference (old): Branch ivas-float-update
  • Encoder (float): c2135116
  • Decoder (float): c2135116
• Fixed point (new): Branch kiene/main-pc-clone-for-merge
  • Encoder (fixed): n/a
  • Decoder (fixed): 7000566d
• Fixed point (old): Branch main
  • Encoder (fixed): n/a
  • Decoder (fixed): b480684c

Bug description

Comparing the output for binaural rendering between BASOP and Float, we are seeing significantly higher differences between BASOP and Float on the branch kiene/float-pc-clone-for-merge compared to the current main (b480684c):

Diff BASOP - Float (new):

Diff BASOP - Float (old):

This is BINAURAL_ROOM_IR output. Same is true when rendering to BINAURAL; when outputing to HOA3 the max. abs. diff is significantly smaller and the same between old and new.

The output of the two floating-point decoders (kiene/float-pc-clone-for-merge, ivas-float-update rev. c2135116) are BE.

Ways to reproduce

IVAS_dec BINAURAL_ROOM_IR 32 stv3OA32c.wav_SBA_at_48_kbps_32kHz_in_32kHz_out_BINAURAL_ROOM_IR_out.192 out.wav 

Bitstream: stv3OA32c.wav_SBA_at_48_kbps_32kHz_in_32kHz_out_BINAURAL_ROOM_IR_out.zip