TEL500-Voice Communications IVR using Speech Recognition in Asterisk Devesh Mendiratta Sameer Deshmukh & Srinivas Madlapelli

Outline  Introduction  Flow Chart  Google API  Google API Interface with Asterisk  Results  Applications  Conclusion  Resources  References

Introduction  Responses as per the input provided by User  Speech to Text Technique  c0dE: Interface of Google API (Application Programming Interface) with Asterisk  Queues  Playback the recordings

Flow Chart

Google API Syntax : same => n,agi(googletts.agi,text,[language],[intkey])  Text field  Language field  Intkey field

Speech agi Syntax: Same => n(record),agi(speech- recog.agi,[lang],[timeout],[intkey],[NOBEEP])

Google agi with Asterisk same => n(record),agi(speech-recog.agi,en-US) same => n,Verbose(1,Script returned: ${status}, ${id}, ${confidence}, ${utterance}) same => n,GotoIf($["${utterance}" = "business"]?sales:recheck) same => n(sales),Background(withusa)

Cont. same => n(sales),Goto(queues,801,1) same => n(recheck),GotoIf($["${utterance}" = "support"]?support:retry) same => n(support),Background(withusu) same => n,Goto(queues,802,1) same => n(retry),Background(repeat) same => n,agi(googletts.agi,"Can you please repeat more clearly?",en) same => n,goto(record)

Results – Sales Queue Execution

Results – Support Queue Execution

 Can be extended by including all possible options  Typical Example – AT&T  Account Recharge- Credit/Debit Card  Balance check  Customer Assistance  Surveys  Campaigning Applications

 Support to all types of Businesses  “Simple design” approach  Service specific, e.g. Ordering Pizza via Phone Conclusion

 Hardware : 3 SIP phones  Interface Files : speech-recog.agi & googletts.agi  Installation : perl-libwww, the WWW library for Perl Resources

 recognition/index.htm  References

Any Questions ?