On Fri, Feb 02, 2007 at 11:37:59AM -0500, ROB wrote: > Bit rate=sampling rate x bit depth > > 1kb/s isn't going to get you too much audio. Try encoding an mp3 at > 1kb/s to see how audible that would be. I think you'd be looking at > something more along the lines of 32-64kb/s to get anything that you > could understand. It might be easier to make a phone call. > Conveniently enough, I think the device will have that capacity as > well.
MP3 isn't for voice audio, it's for music audio (Which has a larger dynamic range and needs more resolution than voice-only audio). For voice-only audio, you'd be better served by a codec like Speex; one that is designed specifically for human speeking vocal range. I've heard completely understandable Speex recordings at about 8kb/sec. They didn't sound that great, but I could understand them. Going back to the original post, I'm not sure even Speex could help, as the biggest thing is going to be the latency of the audio. Cell phones have a bad enough lag just using the regular methods, but if the latency gets up over a second, then you'll be stepping on each other's side of the conversation. -KW _______________________________________________ OpenMoko community mailing list [email protected] https://lists.openmoko.org/mailman/listinfo/community
