Hello, greetings, etc.
I am asking if there are any programs that enable one to transmit or data over a low bandwidth medium such as an analog phone line or store data over a medium such as cassette tape, specifically the latter. I know this has almost absolutely nothing to do with NBTV, but I guess I could put an MPEG on to a tape and call that NBTV. I can't find any program to do such a thing except KCS08, which involves you going through many loopholes to use and doesn't have a half decent data rate. I'm looking for something that uses a digital modulation technique, such as trellis or even PCM. I've done a quick series of equations here:
56Kbps is PCM dialup which is effectively 53.33Kbps over the phone. Taking the phone line out of the equation, as we should all know that cassette sounds quite a bit better than the phone, this adds those ~3Kbps back, as well as 11Kbps for it's original theoretical limitation (look it up) to 64Kbps. A cassette is obviously stereo, so that's two channels at a time of 64Kbps. 64*2 obviously equals 128. 128Kbps * 60 (seconds per minute) = 7680Kb/minute. 7680Kb/min * 47-- on a 90 min tape, the 45min per side limit is actually 47 minutes. Anyway, 7680Kb/min *47 =360,960 Kb per side. Divide that by 10 for Kb (kilobit) to KB (kilobyte) is 36,096 KB per side. Multiply this by two = 72,192 KB per 90min tape. That is 72MB, it's not a data CD but it's a definite improvement when compared to KCS08. Is this possible, and if so why has no one made a program for it?