Stereo Encoder: Differences in DTX for LTV 16 kHz signal

Basic info

• Float reference:
  • Encoder (float): ceb8871f
  • Decoder (float): ceb8871f
• Fixed point:
  • Encoder (fixed): 339e804c
  • Decoder (fixed): n/a

Bug description

For the BASOP encoder, the DTX segment 0:02.26 - 0:03.36 in the LTVs looks and sounds significantly different. Either there is a different CNG mode selected, or the CNG quantization is somewhat wrong. There is energy missing in BASOP.

Float:

BASOP:

Ways to reproduce

IVAS_cod -stereo -dtx 13200 16 ltv16_STEREO.wav ltv16_STEREO_13k2bps_DTX.192
IVAS_dec stereo 16 ltv16_STEREO_13k2bps_DTX.192 ltv16_STEREO_13k2bps_DTX.wav