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ISM Bitrate Switching with dtx return Decoding error: BER detected

Basic info

Bug description

ISM Bitrate Switching with dtx return Decoding error: BER detected

Ways to reproduce

  • Set zero to channel 2 of testv/stv4ISM48s.wav audio items -> stv4ISM48s_chan2_zero_chan2_zero.wav stv4ISM48s_chan2_zero.zip

  • encode with Bitrate Switching and dtx

./IVAS_cod -dtx -ism +4 scripts/testv/stvISM1.csv scripts/testv/stvISM2.csv scripts/testv/stvISM3.csv scripts/testv/stvISM4.csv scripts/switchPaths/sw_24k4_256k.bin 48 scripts/testv/stv4ISM48s_chan2_zero.wav 4_MONO_ism.64

.\IVAS_cod.exe -dtx -ism +4 scripts\testv\stvISM1.csv scripts\testv\stvISM2.csv scripts\testv\stvISM3.csv scripts\testv\stvISM4.csv scripts\switchPaths\sw_24k4_256k.bin 48 scripts\testv\stv4ISM48s_chan2_zero.wav 4_MONO_ism.64

  • decode output BER error

./IVAS_dec EXT 48 4_MONO_ism.64 out.wav

.\IVAS_dec.exe EXT 48 4_MONO_ism.64 out.wav

output :

IVAS Codec Baseline

Based on EVS Codec (Floating Point) 3GPP TS26.443 Nov 04, 2021, Version 12.14.0 / 13.10.0 / 14.6.0 / 15.4.0 / 16.3.0

PS D:\DEV\ivas-3gpp\ivas-codec> .\IVAS_dec.exe EXT 48 4_MONO_ism.64 out.wav

================================================================================================== IVAS Codec Baseline

Based on EVS Codec (Floating Point) 3GPP TS26.443 Nov 04, 2021, Version 12.14.0 / 13.10.0 / 14.6.0 / 15.4.0 / 16.3.0

Input bitstream file: 4_MONO_ism.64 Output synthesis file: out.wav

Output sampling rate: 48000 Hz Bitrate: 24.40 kbps Input configuration: ISM (ParamISM): 2 transport channels Output configuration: External renderer

------ Running the decoder ------

Frames processed: 22
Decoding error: BER detected in frame 21 !!!!! 209
Decoding error: BER detected in frame 208 !!!!! 230
Decoding error: BER detected in frame 229 !!!!! 481
Decoding error: BER detected in frame 480 !!!!! 746
Decoding error: BER detected in frame 745 !!!!! 810
Decoding error: BER detected in frame 809 !!!!! 1281
Decoding error: BER detected in frame 1280 !!!!! 1282
Decoding error: BER detected in frame 1281 !!!!! 1352
Decoding error: BER detected in frame 1351 !!!!! 1371
Decoding error: BER detected in frame 1370 !!!!! 1500

Decoder+renderer delay: 8.25 ms (396 samples at timescale 48000)

Output metadata file: out.wav.0.csv Output metadata file: out.wav.1.csv Output metadata file: out.wav.2.csv Output metadata file: out.wav.3.csv

Decoding of 1500 frames finished

Limiter applied in 2 frames.

Edited by emerit