Actually it doesn't matter for the LPC analysis, because LPC coefficients|
don't depend on the signal's energy
You should only be careful in the further signal processing to treat the
signal energy consistently
From: mgencarellli [mailto:]
Sent: Wednesday, August 14, 2002 6:50 AM
Subject: [speechcoding] Scaling Data for LPC Hi,
I am developing code for a LPC using C6711 dsk.
Could someone tell me if the raw values read from AD535 codec need to
be scaled to +1 to -1 range from the 32768 to -32768 range before the
autocorrelation, and reflection coefficents etc are calculated ? I
have noticed that in one thesis paper they have done so, after
performing pre-emphasis and hamming windowing on the raw data. I
thought this scaling was only done for fixed point.
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