Prediction and Buffering of Digital Speech Streams for Improved TASI Performance on a Demand-Assigned Satellite Channel

摘要

An approach for achieving efficient TASI-like multiplexing of speech on a demand-assigned satellite channel, where a number of ground stations each support a small number of off-hook callers, is proposed and evaluated. The approach presupposes a demand-assignment scheme which allows rapid changes in channel capacity assignments, and includes channel reservation requests based on speaker activity prediction, and buffering of speech at the nodes to increase multiplexing efficiency. System performance results obtained by computer simulation indicate potentially significant reductions in speech cutout fraction and accompanying increases in system TASI advantage. (Author)