The Federal Aviation Administration (FAA) is currently evaluating low rate voice digitizing coder/decoder (CODEC's) for use with the Aeronautical Mobile Satellite Service (AMSS). Phase 2 of this evaluation consisted of air traffic control (ATC) personnel participating in an objective intelligibility test of several CODEC's under operational conditions. The results of the testing show that the intelligibility of the low rate 4.8 kilobits per second (kbps) CODEC's is essentially equivalent to the intelligibility of the 9.6 kbps CODEC. The results also show that the 4.8 kbps CODEC's can operate with high intelligibility under conditions of high bit error rates and operational background noise.


    Access

    Access via TIB

    Check availability in my library


    Export, share and cite



    Title :

    Phase 2 Testing and Evaluation of Low Data Rate Voice CODEC Equipment


    Contributors:
    T. Dehel (author) / M. Grable (author) / J. Child (author)

    Publication date :

    1989


    Size :

    42 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English





    CODEC Test Plan. Phase 3

    M. Grable | NTIS | 1990


    An Efficient Real Time Low Bit Rate Video Codec

    Tripathi, S. / Vikas, R. / Jain, R. C. | British Library Conference Proceedings | 2006


    Evaluation system for mobile radio speech codec

    Miki,T. / Suda,H. / NTT Radio Comm.System Labs.,JP | Automotive engineering | 1991