Evaluation of Low Data Rate Voice CODECS (Coder/Decoders) for Air Traffic Control Applications

摘要

This report describes the test objectives, methodologies, and results of prequalification testing and evaluation of various 4.8 and 2.4 kilo bit per second (kbps) compression rate voice coder/decoders (CODECS) that are being considered for the use in supporting the Federal Aviation Administration's (FAA's) satellite communications technology demonstration program. The principal objectives of this program are to evaluate the performance of these CODECS for potential air traffic applications and to develop CODEC testing procedures tailored to the specific needs of air traffic control (ATC) communications. This report concludes with a description of the relative performance and ranking of the CODECS tested. This information has led to the selection of a quantity of 4.8 and 2.4 kbps CODECS for more comprehensive testing under simulated background noise and satellite channel noise conditions in the CODEC Test Bed Facility. Keywords: Voice communication; Satellite communications. (kt)