1 / 10

About VoiceXML 2.0

About VoiceXML 2.0. Stefanie Shriver a lot of this stuff is pulled directly from the 2.0 spec: http://www.w3.org/TR/voicexml20/. Why use VoiceXML?. Minimizes client/server interactions by specifying multiple interactions per document

bien
Download Presentation

About VoiceXML 2.0

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. About VoiceXML 2.0 Stefanie Shriver a lot of this stuff is pulled directly from the 2.0 spec: http://www.w3.org/TR/voicexml20/

  2. Why use VoiceXML? • Minimizes client/server interactions by specifying multiple interactions per document • Shields application authors from low-level, and platform-specific details • Separates user interaction code (in VoiceXML) from service logic (CGI scripts) • Promotes service portability across implementation platforms. VoiceXML is a common language for content providers, tool providers, and platform providers • Easy to use for simple interactions, yet provides language features to support complex dialogs

  3. VoiceXML has features to handle: • Output of synthesized speech (text-to-speech) • Output of audio files • Recognition of spoken input • Recognition of DTMF input • Recording of spoken input • Control of dialog flow • Telephony features such as call transfer and disconnect

  4. What can you do with VoiceXML? • Create simple dialogs, simply. • Good for prototyping (hmm, would this have worked for USI keyword experiment?) • Create more complex dialogs with some work. • "VoiceXML supports a limited type of mixed initiative. VoiceXML does NOT support the user asking arbitrary questions during a dialog." • I think it can actually be more arbitrary than this, though, with more complex grammars.

  5. [ SUB_PLST:plst {<option strcat($plst "^d=na^ps=true")>} SUB_TMST:tmst {<option strcat($tmst "^d=na^ps=false")>} SUB_HELP:hst {<option strcat($hst "^d=na^ps=hh")>} SUB_STARTOVER:sst {<option strcat($sst "^d=na^ps=hh")>} SUB_QUIT:qst {<option strcat($qst "^d=na^ps=hh")>} SUB_UPDATE:updt {<option strcat($updt "^d=na^ps=updt")>} SUB_LEADER:ldr {<option strcat($ldr "^d=na^ps=ldr")>} SUB_NEWGAME:ngm {<option strcat($ngm "^ps=go")>}] SUB_STARTOVER [ (start over) {return (strcat("event=" "home"))} (?(go) home) {return (strcat("event=" "home"))}] SUB_NEWGAME [ (?(i want to) go to SUB_ALLTEAMS:t ?(game)) {return (strcat(strcat("team=" "")strcat($t "^d=today")))} ([(tell me) what] about the SUB_ALLTEAMS:t ?(game)) {return (strcat(strcat("team=" "")strcat($t "^d=today")))} (?(i want to) go to the last SUB_ALLTEAMS:t ?(game)) {return (strcat(strcat("team=" "")strcat($t "^d=last")))} ([(tell me) what] about the last SUB_ALLTEAMS:t ?(game)) {return (strcat(strcat("team=" "")strcat($t "^d=last")))} (?(i want to) go to yesterday's SUB_ALLTEAMS:t ?(game)) {return (strcat(strcat("team=" "")strcat($t "^d=yesterday")))} ([(tell me) what] about yesterday's SUB_ALLTEAMS:t ?(game)) {return (strcat(strcat("team=" "")strcat($t "^d=yesterday")))}] SUB_QUIT [ (quit) {return (strcat("event=" "quit"))} (good bye) {return (strcat("event=" "quit"))}] SUB_PLST [ [ (SUB_PLAYER:p SUB_STAT:s) (SUB_STAT:s SUB_PLAYER:p) (?[(give me) (tell me ?(about)) (what is)] ?(the) SUB_STAT:s ?(for) SUB_PLAYER:p) (?(SUB_TELLME) how many SUB_STAT:s SUB_PLAYER:p has ?(had))

  6. Resources • http://www.w3.org/TR/voicexml20/ • http://www.voicexml.org/ • Development platforms: • http://studio.tellme.com/ • http://cafe.bevocal.com • http://freespeech.heyanita.com • http://developer.voicegenie.com/ • see http://www.commweb.com/article/COM20010129S0003 for an article comparing these platforms

  7. What about SALT? • http://www.saltforum.org/ • SALT developed/promoted by Microsoft, Philips, SpeechWorks, Intel, Cisco, Comverse • VoiceXML developed/promoted by AT&T, Lucent, IBM, Motorola

  8. SALT features • Focus on multi-modal development • Supports XML form of SRGS • Parallel tasks • Applications are DOM based • Uses SSML for speech synthesis • Call Control • Applications are scripted in ECMAScript (aka Javascript) • Uses fewer XML elements (see http://www.voicexmlplanet.com/articles/saltspec.html)

  9. Multi-modality in SALT <xhtml xmlns:salt="urn:schemas.saltforum.org/2002/02/SALT"> <!-- HTML --> ... <input name="txtBoxCity" type="text" onpendown="listenCity.Start()"/> ... <!-- SALT --> <salt:listen id="listenCity"> <salt:grammar name="gramCity" src="./city.xml" /> <salt:bind targetelement="txtBoxCity" value="//city" /> </salt:listen> </xhtml>

  10. Discussion • Can something this "simple" really handle user- or mixed-initiative that well? • What are the implications of having a standard, but having different development platforms with different supported & proprietary features? • What do we really need to solve dialog system development? (per Alex…) • Can multi-modalality be successfully integrated (i.e. via SALT)?

More Related