Date: Wed, 31 Mar 1993 10:44:06 PST From: "mycal's fc email account" Subject: Going Voice FC ppl, I was checking out the post about the internet radio show. So I thought I would bounce the following off you ppl. I just received the CELP specs from the government, it came with souce code too! CELP is a way to convert analog to digital for communications. Crushing down a 30-3000hz voice channel to 4800bps. It looks like it is pretty spendy for a full duplex setup (12.8mips). But according to the dox, you can degrade the quality thus the horse power (to 5.5mips). (also the code is written in 'C' so converting it to asm could speed it up.) (also 30min would be about 8.6mb, about half the internet radio show is said to take up.) I was thinking that this may be a cool project to assemble, maybe go half duplex at first, using a sound blaster board on the ibm, or using the mac's or sun's built in hardware. then adding data encription and full duplex later when more powerfull chips and better d/a hardware become availible. I think it would be cool on IRC or similar to "go voice mode" when you want to converse in a more powerfull way to someone. Data encription could add privacy. You could also use this for a direct dialup for a "secure phone line". There is also 2400bps code out there called LPC-10e, I haven't found any info on that yet, but it could too be an option. What do you think about "Going Voice"? mycal -- ---------------------------------------------------------------------------- PGP 2.x Key on Request INTERNET:mycal@netacsys.com USENET:crl!netacsys!mycal