Time shift between fixed- and floating-point output when decoding an OSBA (ISM4_HOA3) 80kbps bitstream

Basic info

• Encoder (float): d18cbee3 (ivas-float-update)
• Decoder: 074e9116 (tag: 20241023_Ittiam_Decoder_Release_subjective_Testing)

Input format: ISM4_HOA3

Input level: -16LKFS

Encoding bitrate: 80kbps

Bug description

As seen in the capture video provided in the Box folder, time shift in the higher order SBA channels were observed between the fixed- and floating-point output

Ways to reproduce

Supporting files: ...\Box\EXTERNAL_IVAS_BASOP_VERIFICATION\issues\issue-1023

Command line:

./IVAS_cod_ref -no_delay_cmp -ism_sba 4 3 in_0.csv in_1.csv in_2.csv 80000 48 in_3.csv in.wav bit
./IVAS_dec -no_delay_cmp EXT 48 bit fx.wav
./IVAS_dec_ref -no_delay_cmp EXt 48 bit fl.wav