FIELD: communications.
SUBSTANCE: communication system has decoder and testing system for sending test data to decoder. Test data include signaling data field, sent via traffic channel, and speech signal parameters, encoded via channel encoding, are formed in form of frames by testing device and sent to decoder for decoding. Decoder extracts at lest a portion of signaling data field, sent along traffic channel, from decoded test data and sends at least a portion of signaling data, sent via traffic channel, back to testing device. Efficiency of decoding is measured by comparison of sent field of signaling data, sent along traffic channel, and signaling data field, sent along traffic channel, received in testing device.
EFFECT: higher quality, higher efficiency.
3 cl, 6 dwg
