[FFmpeg-trac] #1848(avcodec:new): AMR-NB Q bit ignored

FFmpeg trac at avcodec.org
Fri Oct 26 15:45:50 CEST 2012

#1848: AMR-NB Q bit ignored
             Reporter:  krisha      |                    Owner:
                 Type:  defect      |                   Status:  new
             Priority:  normal      |                Component:  avcodec
              Version:  git-master  |               Resolution:
             Keywords:  amrnb       |               Blocked By:
             Blocking:              |  Reproduced by developer:  0
Analyzed by developer:  0           |

Comment (by krisha):

 I attached a sample with 6 bad frames marked as BAD_SPEECH (Q cleared) at
 ~ 1s 660ms. I hear a small noise. But now I'm not totally sure, if in this
 implementation the Q bit is needed. Maybe the implementation automatically
 decreases the volume of bad frames even without using the Q bit. If so, a
 comment in the code would have been nice :)

 I will continue to play with that and let you know about my results.

 Please ignore the NO_DATA (0x7C) after the bad frames in the sample.

Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/1848#comment:4>
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