perm filename LETTER[4,ALS]1 blob sn#054419 filedate 1973-07-22 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 parmeters 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	suggese that you all copy and print. Incidentially, 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 composit 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 dimentional plots that we obtain are two-dimentional projections
03200	made  from the n-dimentional space represented by all of the
03300	measurements that are made.