Encoder Audible Artifact in Speech Stereo DTX @24.4 kbps High MLD

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

There is an audible artifact in speech stereo item with DTX on at 24.4 kbps which results in high MLD of 27. It can be seen at the right channel around 6.3 seconds.

Floating point:

Fixed point:

Ways to reproduce

Box folder: ...\Box_EXTERNAL_IVAS_BASOP_VERIFICATION\issues\issue-1549

./IVAS_cod_ref.exe -dtx -stereo 24400 48 s11.wav bitref
./IVAS_dec_ref.exe stereo 48 bitref ref.wav

./IVAS_cod.exe -dtx -stereo 24400 48 s11.wav bit
./IVAS_dec_ref.exe stereo 48 bit dut.wav