Did you know that using LPC (linear predictive coding) on speech can near-telephone quality at only 8 k BITs/second? With a signficant decrease in quality (but still very understandable... probably better than radio) you can get the rate down to 2kbps. If you don't mind sounding like a speak&spell, you can go to 600bps or less. Using LPC, you could send real-time voice over the internet. It would even work (maybe just barely) over a SLIP connection. According to my professor, LPC can be implemented in a simple DSP chip, so I figure a 486 ought to be able to handle it, too. Sound like an interesting (granted maybe not too useful) project? It would be a way of providing secure voice communications -- LPC code the speech, encrypt the data stream, transmit via v.32bis modem, etc. -- -------------------------------------------------------------------- Jeff Porter jporter@uiuc.edu TA: ECE 290..."ph Jeff Porter" for office hours -- Jeremy Porter ------------- Systems Engineering -------- Dell Computer Corp. ------ jerry@terminus.us.dell.com ---- --- 70 4F BD AE 6D E9 D2 66 48 18 8B E7 64 7F 59 8F --- Support your Second Amendment rights to encryption technology.