Proposal of standards for intelligibility tests of Chinese speech

The authors propose standards for evaluating the intelligibility of coded, synthesised or distorted Chinese speech over a wired or wireless voice channel in a communication system. The standards are based on the English equivalent diagnostic rhyme test (DRT) and modified rhyme test (MRT). The relative features of Chinese phonetics are outlined and the underlying principles of choosing phonetic units for the proposed standards, the Chinese diagnostic rhyme test (CDRT) and the Chinese modified rhyme test (CMRT), are presented