1. © 2001 CUHK Recognition Software Building Block Overview 1. Task specification — What is the function of the system ? 2. Recognizer Design — Vocabulary selection What words the system should know ? Grammar definition What is expected in the speech ? 3. Recognizer Testing — How does it perform ? Major Processes in Designing a Speech Recognizer using CURSBB AudioInterface Task Specification Prototype system VocabularySelection GrammaticalRegulation Recognizer Tuning RecognizerGeneration RecognizerTesting RecognitionSoftware Building Block © 2000 CUHK Hardware Interface ChineseLexicalDataInventory ChineseAcousticModelsInventory

2. © 2001 CUHK Recognition Software Building Block Example Task - I 1.Task specification — What are the functions of the system ? Accept voice commands from user and take appropriate actions. 2.Vocabulary selection — What words the system should know ? Select a list of command words from the lexicon(s) or input them explicitly. 3.Grammar definition — What is expected in the speech ? Design the expected flow of commands during the course of user voice control. Development of a Voice Control Device

3. © 2001 CUHK Recognition Software Building Block Example Task - II Step 1.Vocabulary Selection Select a list of command words from the lexicon(s) Select a list of command words from the lexicon(s) User implicitly input new items User implicitly input new items Step 2.Grammar Definition Add the required number of nodes Add the required number of nodes Select from the lexicon those term desired. Drag-N-drop them to the corresponding nodes. Select from the lexicon those term desired. Drag-N-drop them to the corresponding nodes. Drag from the node output to the node input to define an allowed path. Drag from the node output to the node input to define an allowed path. Step 3.Recognizer Testing Select recognizer network file Select recognizer network file Generate recognizer network file with a mouse click Generate recognizer network file with a mouse click Voice input to microphonetelephone microphonetelephone