TRANSMISSION OF STILL AND MOVING IMAGES OVER NARROWBAND CHANNELS

Radio networks, such as those used by emergency services or public transportation, transmit across a narrow bandwidth, thus requiring low transmission rates. This document describes the channels and transmission method of these existing networks. Applying complex algorithms to code images allows development of a source codec. This codec uses multiple TMS320C40 32-bit parallel digital signal processors (DSPs) for a system that provides a source data rate as low as 8 kbps. This is used to transmit the images over the radio network bandwidth.

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