Very high MLD for ParamISM (ISM4) 24.4kbps SWB with +10dB input and DTX enabled
# Basic info <!--- Add commit SHA used to reproduce --> - Float reference: - Encoder (float):53594392095aa5d3b5ad748c4a092634216338e2 - Decoder (float):53594392095aa5d3b5ad748c4a092634216338e2 - Fixed point: - Encoder (fixed):8633801ab61b56f60291d200913ac4eac64199eb - Decoder (fixed): # Bug description There is very high MLD (46.12) reported for item bm6ba1s14 for input level +10dB. Looking at the difference signals of float - BASOP there seem to be some issue with gains, especially with objects 1 and 3: ![Screenshot_2025-05-16_at_14.44.39](/uploads/2e378ba17b4870961fc7f58e006b6a26/Screenshot_2025-05-16_at_14.44.39.png) There is also a clear segment at timestamp 9.160 sec where there is a clear energy burst across all active objects: BASOP ![Screenshot_2025-05-16_at_14.36.51](/uploads/55da869fff0d36215961e0a15b7bb300/Screenshot_2025-05-16_at_14.36.51.png) float ![Screenshot_2025-05-16_at_14.37.01](/uploads/e7cec1772ddfeeb51bb734c171791279/Screenshot_2025-05-16_at_14.37.01.png) # Ways to reproduce Box folder: ...\Box_EXTERNAL_IVAS_BASOP_VERIFICATION\issues\issue-1590 <!-- Commandline or script --> ```bash ./IVAS_cod -dtx -ism 4 bm6ba1s14.0.csv bm6ba1s14.1.csv bm6ba1s14.2.csv bm6ba1s14.3.csv -max_band SWB 24400 32 bm6ba1s14_32.10dB.wav bm6ba1s14[10dB].dec.192 ./IVAS_dec EXT 32 bm6ba1s14[10dB].dec.192 bm6ba1s14[10dB].dec.wav ``` It should be noted that this happens for other sampling rates and with dtx off for this particular item but also for quite a few other items, for the cases where the input level is +10dB <!--- Below are labels that will be added but are not shown in description. This is a template to help fill them. Add further information to the first row and remove and add labels as necessary. -->
issue