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    • Martin Storsjö's avatar
      g722: Fix the QMF scaling · b087ce2b
      Martin Storsjö authored
      This fixes clipping if the encoder input used the full 16 bit
      input range (samples with a magnitude below 16383 worked fine).
      The filtered subband samples should be 15 bit maximum, while
      the code earlier produced them scaled to 16 bit.
      
      This makes the decoder output have double the magnitude
      compared to before.
      
      The spec reference samples doesn't test the QMF at all, which
      was why this part slipped past initially.
      Signed-off-by: 's avatarMartin Storsjö <martin@martin.st>
      b087ce2b
  12. 25 Feb, 2012 1 commit
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    • Sjoerd Simons's avatar
      g722: Change bits per sample to 4 · f32fd318
      Sjoerd Simons authored
      Earlier, bits per sample was defined as 8, since
      bits_per_coded_sample was used to indicate whether to ignore
      the lower bits of the codeword, having values 6, 7 or 8.
      
      g722 encodes 2 samples into one byte codeword, therefore the
      bits per sample is 4. By changing this, the generated timestamps
      for streams encoded with g722 become correct.
      
      This makes timestamp generation for g722 data correct (both when
      encoding and when demuxing from raw g722 files).
      Signed-off-by: 's avatarMartin Storsjö <martin@martin.st>
      f32fd318
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