TESTING LOOPS FOR CHANNEL CODECS

摘要

A method for measuring the performance of decoding in a telecommunication system comprising a decoder and a testing apparatus for supplying test data to the decoder. A test data comprising channel coded speech parameters and an inband data field in a frame format is generated in the testing apparatus an d transmitted to the decoder for decoding. The decoder extracts at least a par t of the inband data field from the decoded test data and transmits at least t he part of the inband data field back to the testing apparatus. The performance of decoding is measured by comparing the transmitted inband data field and t he received inband data field in the test apparatus.