[#1085] Add documentation about no tee models

diff --git a/Documentation/TIesr_Data_Training.txt b/Documentation/TIesr_Data_Training.txt
index 88b0333b0c892d9f728b7d81cbc4df7b44863ed3..a67a2f5c2bdfa4ec6c7e4e5533321d303b5acff0 100644 (file)
--- a/Documentation/TIesr_Data_Training.txt
+++ b/Documentation/TIesr_Data_Training.txt
@@ -457,6 +457,11 @@ that describes all aspects of the HTK tools. The user not familiar with HTK must
 read the HTK Book in order to understand the following discussion on preparing
 the acoustic model data files for TIesr.
 
+The structure of HMMs in TIesr requires a set of emitting states, and one final
+non-emitting exit state. Entry into an HMM must be to an emitting state, and
+exit is from the final non-emitting state. Therefore, HTK "tee" models are not
+allowed in TIesr.
+
 Preparing Data for HMM training
 -------------------------------
 As mentioned in the section on Data Preparation, training acoustic HMMs requires