Draft: basop-2366-precison-lost-during-re-scaling-of-the-weight-speech-memory-vector [non-BE][split-non-BE]

vaillancourrequested to merge
basop-2366-precison-lost-during-re-scaling-of-the-weight-speech-memory-vector into main
  • Related issues: #2366
  • Requested reviewers:

Reason why this change is needed

  • The vector old_wsp_fx is unnecssarily rescaled leading to a lost of precision that can affect the computation of some parameters (open loop pitch, voicing,...)

    When removing this unnecessary rescaling, the mld score for the ltv48_stereo encoded at 16.4 kbps goes from 4.31 to 2.66 .

Description of the change

  • removing the un-needed scaling

Affected operating points

  • The encoder will not be bit-exact, but this will be inter-operable..
  • Decoder should be BE
  • Difference may be high due to different paths taken in the encoder

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