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[non-BE]Codec Level Harmonization: Non-diegetic panning of mono to stereo is 3LKFS quieter

emeritrequested to merge
float-1530-Non-diegetic_panning_of_mono_to_stereo_is_3LKFS_quieter into main
  • Related issues: #1530
  • Requested reviewers:

Reason why this change is needed

  • When rendering an EVS mono bitstream to stereo, the output loudness is 3LKFS quieter than the input.

Description of the change

  • update mono to stereo panning function

Affected operating points

  • Describe here as well as possible what operating points are affected and how
  • In minimum, there should be a status for bitstream compatibility and output bit exactness
  • For bitstream compatibility, the following levels are helpful for describing encoder
    1. Produced bitstream is BE compared to previous state.
    2. Produced bitstream is non-BE but it is fully backwards compatible for decoding. Decoded output may differ.
    3. Produced bitstream is non-BC. Old decoder cannot decode the produced bitstream correctly.
  • For output difference, use BE or non-BE. Additionally, amount of difference can be presented.

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