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envelope detector query

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rsrinivas

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Hi

I have a wave file(44100 Fs) and i am feeding it to a BPF(say 1000 Fc,44100 Fs)
I get some output out of BPF which are energy samples.
Now i need to plot the envelope of these samples.
i am using sign magnitude form
inputs::: 16 bit inputs with 15 bits fractional
i.e. Q(16,15) range -1 to 1
outputs:::16 bit outputs with 11 bits fractional
i.e. Q(16,11) range -16 to 16
is it sufficient tat i check the MSB of the data and decide whether it's positive or
negative sample or something extra has to be done.
later i can pass it through an LPF to get the envelope right???

thanks in advance 4 ur valuable suggestions
 

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