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Audio distortion in test_sba_enc_BWforce_system tests

DUT: IVAS_dec built from commit 6d882f.

Audio distortions have been observed with a list of test_sba_enc_BWforce_system test cases, giving rise to high mld scores (~8.5-11.3). The observed symptoms are similar, as illustrated in the plots below.

  • Observed distortion image image

  • Impacted test cases | tests/codec_be_on_mr_nonselection/test_sba_bs_enc.py::test_sba_enc_BWforce_system[sample_rate_bw_idx2-stvFOA-0-64000]
    | tests/codec_be_on_mr_nonselection/test_sba_bs_enc.py::test_sba_enc_BWforce_system[sample_rate_bw_idx2-stvFOA-1-64000]
    | tests/codec_be_on_mr_nonselection/test_sba_bs_enc.py::test_sba_enc_BWforce_system[sample_rate_bw_idx2-stvFOA-0-256000]
    | tests/codec_be_on_mr_nonselection/test_sba_bs_enc.py::test_sba_enc_BWforce_system[sample_rate_bw_idx2-stvFOA-0-384000]
    | tests/codec_be_on_mr_nonselection/test_sba_bs_enc.py::test_sba_enc_BWforce_system[sample_rate_bw_idx2-stvFOA-0-160000]
    | tests/codec_be_on_mr_nonselection/test_sba_bs_enc.py::test_sba_enc_BWforce_system[sample_rate_bw_idx2-stvFOA-0-96000]
    | tests/codec_be_on_mr_nonselection/test_sba_bs_enc.py::test_sba_enc_BWforce_system[sample_rate_bw_idx2-stvFOA-0-512000]
    | tests/codec_be_on_mr_nonselection/test_sba_bs_enc.py::test_sba_enc_BWforce_system[sample_rate_bw_idx1-stvFOA-0-64000]
    | tests/codec_be_on_mr_nonselection/test_sba_bs_enc.py::test_sba_enc_BWforce_system[sample_rate_bw_idx1-stvFOA-1-64000]
    | tests/codec_be_on_mr_nonselection/test_sba_bs_enc.py::test_sba_enc_BWforce_system[sample_rate_bw_idx1-stvFOA-0-160000]
    | tests/codec_be_on_mr_nonselection/test_sba_bs_enc.py::test_sba_enc_BWforce_system[sample_rate_bw_idx1-stvFOA-0-512000]
    | tests/codec_be_on_mr_nonselection/test_sba_bs_enc.py::test_sba_enc_BWforce_system[sample_rate_bw_idx1-stvFOA-0-384000]
    | tests/codec_be_on_mr_nonselection/test_sba_bs_enc.py::test_sba_enc_BWforce_system[sample_rate_bw_idx1-stvFOA-0-256000]
    | tests/codec_be_on_mr_nonselection/test_sba_bs_enc.py::test_sba_enc_BWforce_system[sample_rate_bw_idx1-stvFOA-0-96000]

Edited by Jiaquan Huo