Encoder Stereo Missing Energy in Higher Bands @32 kbps

Basic info

• Float reference:
  • Encoder (float): deee9b97 (Wed Apr 23 06:31:22)
  • Decoder (float): deee9b97 (Wed Apr 23 06:31:22)
• Fixed point:
  • Encoder (fixed): 182c2a50 (Tue Apr 29 11:08:25)
  • Decoder (fixed):

Bug description

BASOP encoder is missing energy in high frequency bands (>8kHz) for an applause stereo item.

Floating point:

Fixed point:

Frequency Analysis:

Ways to reproduce

Box folder: ...\Box_EXTERNAL_IVAS_BASOP_VERIFICATION\issues\issue-1544

./IVAS_cod_ref.exe -stereo 32000 48 m56.wav bitref
./IVAS_dec_ref.exe stereo 48 bitref ref.wav

./IVAS_cod.exe -stereo 32000 48 m56.wav bit
./IVAS_dec_ref.exe stereo 48 bit dut.wav