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Mention the fixed-point scale of the FIR filter coefficients.

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Originally committed as revision 14888 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2008-08-21 21:56:48 +00:00
parent ba05497de5
commit 7dd3e95a04
1 changed files with 2 additions and 1 deletions
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libavcodec/acelp_filters.h
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@ -28,7 +28,8 @@
/**
* low-pass Finite Impulse Response filter coefficients.
*
* Hamming windowed sinc filter with cutoff freq 3/40 of the sampling freq.
* Hamming windowed sinc filter with cutoff freq 3/40 of the sampling freq,
* the coefficients are scaled by 2^15.
* This array only contains the right half of the filter.
* This filter is likely identical to the one used in G.729, though this
* could not be determined from the original comments with certainity.