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    • Martijn van Beurden's avatar
      Add partial_tukey and punchout_tukey apodization functions · 29a28338
      Martijn van Beurden authored
      Adds two new apodization functions that seem to perform better than
      the apodization functions currently in the codebase and fixes three
      existing windows as well.
      
      Its important to note that this patch only affects the encoder stage
      that evaluates various possible predictors. Audio encoded with these
      new windows will still decode with existing legacy decoders.
      
      = Theory =
      These functions are used to window the  audio data at the predictor
      stage. These news functions enable the use of only part of the signal
      to generate a predictor. This helps  because short transients can
      introduce noise into the predictor. The  predictor becomes very good
      at prediciting one part of the  signal, instead of mediocre for the
      whole block.
      Signed-off-by: default avatarErik de Castro Lopo <erikd@mega-nerd.com>
      29a28338
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