Efficient Multiplexing of Voice and Data
An efficient system for transmitting voice and data on a single channel
would be useful in many areas - defense, transportation, and even entertainment.
The use of a single channel would reduce the costs of maintenance (phone
bills, for example) and equipment. This project involved developing such
a system by digitizing the voice, compressing it, and building packets
of digitized voice or data.
The goal is a system that's transparent to both the user and the digital
system involved. This is done with a "black box" that sits between the
computer and its modem. The computer sees the device as merely a slower
serial device. Hardware difficulties have prevented the development of
a real-time system, but a prototype has been developed. The prototype runs
entirely within the DSP processor memory, using sampled voice and text
files for its input.
Robert A. Crawford
Advisor: Dr. J. W. Sennott