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Preprocessing time-domain issues

Basic info

  • Fixed point:

Bug description

For the time domain stereo, the ICA is systematically under-estimated the time shift as seen in the figure below.

from top to bottom :

  • input signal
  • time shift (input to quantized) float
  • time shift (input to quantized) fixed point
  • difference between float and fixed point input to the quantizer
  • output of the quantized float
  • output of the quantized fixed point
  • difference between float and fixed of the quantized output

image

The next figure shows the same plot as above, but with the correction proposed in !1135 (merged) . It can be seen that when the input to the quantize is the same between float and fixed point, the output is the same as well

image

Ways to reproduce

Box folder: ...\Box_EXTERNAL_IVAS_BASOP_VERIFICATION\issues\issue-xxxx

input_32k_short

IVAS_cod -STEREO 2 32000 32 input_32k_short bit
Edited by vaillancour