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BASOP Encoder: Distortion at High Frequencies, Stereo

Basic info

  • Float reference:
  • Fixed point:
    • Encoder (fixed): 20cb1008
    • Decoder (fixed):

Bug description

There is a distortion at the beginning between 0.08 and 0.12 seconds. It is visible in high frequency band, starting from 8 kHz. The issue is present both when DTX is on/off.

Float:

Screenshot2025-02-13_ref_si1

Fixed:

Screenshot2025-02-13_dut_si1

Ways to reproduce

Box folder: ...\Box_EXTERNAL_IVAS_BASOP_VERIFICATION\issues\issue-1247

./IVAS_cod_ref.exe -dtx -stereo 32000 48 si_input.wav bitref
./IVAS_dec_ref.exe Stereo 48 bitref out_ref.wav

./IVAS_cod.exe -dtx -stereo 32000 48 si_input.wav bit
./IVAS_dec_ref.exe Stereo 48 bit out_dut.wav