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sn#055603 filedate 1973-07-30 generic text, type T, neo UTF8
00100 As an aftermath of the very successful CMU Segmentation meeting it has
00200 occurred to me that it would be very helpful if we could all have
00300 detailed comparisons of the way different components of our
00400 segmentation and labeling schemes behave. To this end I would like to
00500 propose that we first compare the results that we get in labelling
00600 segments as to whether they are voiced or not, or perhaps we might
00700 compare the results when we try to put each segment into one of four
00800 classes, these being (1) Voiced but not with frication, (2) Frication
00900 without voicing, (3) voiced-fricative, and Stops, which would include
01000 pauses, unvoiced stops, and voiced stops.
01100
01200 It happens that we are able to make a very rapid evaluation of the
01300 usefulness of any subset of two different parameters in terms of their
01400 utility in identifying any set of features as found in the 31 test
01500 sentences. We can supply this evaluation via the net if we are
01600 supplied with a file of the parameters with an identifying label for
01700 successive samples of the acoustic signal, given the locations of
01800 these samples, for the 31 test sentences. It simplifies our procedure
01900 if these parameters have values in the range of 0 to 63. Our results
02000 can be returned via the net as a file which will produce plots such
02100 as those that can be seen on my file VOICED.PLT[NET,ALS] which i
02200 suggest that you all copy and print. Incidentally, we are not proud
02300 of these results and we are not supplying them as samples to shoot
02400 at, but simply as something to show to form of the output.
02500 We realize that many of you have a single parameter to effect
02600 separations of the type indicated. However these composite parameters
02700 are probably obtained by some sort of mathematical relationship
02800 between actual measured parameters and our test would show the ideal
02900 separation that could be obtained from any two of these measured
03000 parameters if one is limited to an accuracy specified by 6 bits. The
03100 two dimensional plots that we obtain are two-dimensional projections
03200 made from the n-dimensional space represented by all of the
03300 measurements that are made.