Voice Composer: A Development Tool for Voice Applications Yi-Xuan Li and Nai-Wei Lin Department of Computer Science & Information Engineering National Chung Cheng University

Outline Motivations Related work The architecture of Voice Composer The visual programming editor The program generator A case study Conclusion

Prevalence of mobile voice devices requests rapid development and maintenance of voice applications Eye-disabled people requests convenient accesses of information and services via voice devices Current development tools for voice applications still have enough rooms for improving Motivations

Voice XML Voice XML gateway interpreter ASR TTS call processor Voice XML document Internet PSTN

Dialog Flow

Current Tools Voice XML editors –syntax-directed editing Dialog wizards –programming with dialog components Visual dialog flow editors –visual programming of dialog components

The Architecture of Voice Composer Dialog Flow Editor Program Generator Simulator Database Integrator Dialog Component Builder Visual Programming Editor

Database Integrator is based on ODBC, and maintains database schemas and database connection information Database Integrator database connection database schemas

Builtin dialog components –start 、 exit 、 PHP 、 SQL 、 Menu 、 link User-defined dialog components –leaf components –root components: global variables and events –subdialog components Dialog Components

An Example menu 1.article 2.music 3.exit read article play music menu 1.repeat 2.exit press ’#’ menu 1.repaet 2.exit

Builtin dialog components used –start 、 exit 、 Menu New dialog components –Two leaf components Read article Play music –A root component A global event: return to the main menu when pressing ’ # ’ key Build New Dialog Components

Dialog Component Builder Exposed Attributes Attributes Selected Element Dialog Component Tree

Play Music Dialog Component Attributes

Play Music Dialog Component Exposed Attributes

New Dialog Components

Dialog Flow Editor description exposed attributes link commands user-defined builtin

Editing Root Component exposed attributes

Editing Main Menu Component exposed attributes

Editing Read Article Component exposed attributes

Editing Play Music Component exposed attributes

Editing Menu I Component exposed attributes

Editing Menu II Component exposed attributes

Translation of builtin dialog components Translation of user-defined dialog components Program Generator

Translation of Builtin Components

這是一個範例測試，選 1 ，聽文章， 選 2 ，聽音樂，選 3 ，離開 聽文章 聽音樂 離開 Menu_prompt dtmf-1string-1

Translation of User- Defined Components Xerces Tree Conversion Voice XML PHP Conversion PHP Dialog Component Tree DOM Tree

An Example

Dialog Component Tree

Tree Conversion Conversion of external variables Conversion of grammars Conversion of SQL commands

Conversion of External Variables cont=”yesno=’ye s’” vxml formvar name=questio n field filled grammarprompt expr=question 請選擇 是或是 否 ifelse goto next=A.vxm l goto next=B.vxml Grammar_process() SQL_process()

Conversion of Grammars

Conversion of SQL Commands

Voice XML Generation

Conversion of PHP files

Case Study

System analysis: 4 hours Database construction: 2 hours User-defined component construction (4): 1 hour Dialog flow editing (13): 0.5 hour 124 Voice XML or PHP files are generated

Conclusion Voice Composer is a development tool for voice applications Voice Composer supports visual programming of dialog flows Voice Composer supports extension for user-defined dialog component construction Voice Composer supports extension for database programming