1. Home
  2. Electronics Design
  3. PCM designs

PCM designs

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

Reply to
opehunt
Loading thread data ...

  1. Find a PC that will still run DOS.
  2. Lash up a mic preamp and comparator, to square up your voice waveform.
  3. Hook the comparator output to the printer port interrupt.
  4. 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

Reply to
Rich Grise

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
Reply to
joseph2k

ElectronDepot website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.