Hi,
I'm working on a project which requires me to design and construct a pulse code modulator for voice. I need to find out the different ways possible for implementing this. Please I need information on this.
Thanks Ope Odeleye
PCM designs
Apr 11, 2007
2 Replies
- Find a PC that will still run DOS.
- Lash up a mic preamp and comparator, to square up your voice waveform.
- Hook the comparator output to the printer port interrupt.
- Every time there's an interrupt, save the timer's current count, and reset the timer. Save these values to a file.
To playback, write a timing loop that takes the time values recorded in step (4) above, and toggle the computer speaker on each transition.
Good Luck! Rich
There are more ways to do it than i can successfully enumerate. Find and pick a few and then you can ask about choosing among them.
JosephKK
Gegen dummheit kampfen die Gotter Selbst, vergebens.
--Schiller
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