Subjective evaluation of different error correction schemes for application with a 900 MHz frequency hopper communication system
Kimberly Braaten, Dean Foster, Bruno Korst-Fagundes, Haoye Shen · Canadian acoustics · 1999
This paper presents an analysis of subjective tests conducted with a 900 MHz frequency hopper. The primary purpose of such a study is to evaluate the listeners' response to radio channel interference causing loss of speech data. The pre-testing phase determined the users' preference for a 32 kbits/s Adaptive Delta Pulse Code Modulation (ADPCM) system. The three main tests performed determined the parameters of the error correction schemes most preferred by the listeners. The purpose of the tests performed was three-fold: to determine the type of correction scheme preferred by the listeners, to subjectively evaluate the performance of the preferred correction scheme, and to determine the response of the listeners to different interference scenarios. Results from the subjective testing performed are presented and analyzed in this report.