Practical
instructions:
1. Open the
program: Start -> Programs -> Scansoft Speech -> VoCon 3200 -> EDS
v2.0 -> Recognition Evaluator
2. Click
"Add" to add a BNF grammar “connected_digits.bnf”. You
may click "View" to see its grammar in text style.
3. Click
"Start" button at the top left to start recording. To stop recording,
you can either by click "Stop" button or keep silence -- the system
can detect if your speech ends automatically.
4. When saving
your own grammar, you must set "Save as Type" to "All
Files" and set the file as "Unicode" in the list box
"Encoding".
5. If when you
click "start", some red words appear on the "Results" box,
then there must be something wrong with your grammar. Correct your grammar and
run it again.
Here is the text
for the examples in “Notation for BNF-grammars”: example 1 & example 2.
Exercise:
Before designing your own grammars for the questions of this excercise, download and investigate a grammar of word loop. Use the word loop grammar to test the recognizer with the commands in the questions. Then you can design the BNF grammar of your own to achieve better recognition accuracy.