Methods for a Detailed Analysis of Dynastat DRT Results.
13 October 1987
The perceived quality of speech communication systems is highly correlated with independent measures of speech intelligibility such as Dynastat's widely used Diagnostic Rhyme Test (DRT). The DRT attempts to evaluate how well phonetic information is conveyed to a listener. Although intelligibility tests have traditionally been used only to compare the performance of communication channels, the analysis of intelligibility errors has considerable diagnostic utility. Some new methods for the detailed analysis of DRT intelligibility errors are presented. The DRT test and its results obtained from Dynastat are described, and their limitations are briefly discussed. Methods for a more detailed diagnostic analysis are described, and examples are included of the re-analysis of some recent DRT results and their uses for the improvement of low bit-rate speech coding systems.