Loquendo SISR 1.0 Implementation Report

Loquendo believes speech market can take great benefit from speech
standards and is continuously supporting their development and
deployment. As an active member of the W3C Voice Browser group, Loquendo
welcomes the Semantic Interpretation for Speech Recognition
recommendation as the last step toward a standard-only speech grammar
definition.
Further to the full implementation of the W3C SRGS (voice and DTMF mode,
ABNF and XML syntax, signal and text input), Loquendo ASR 7.0 now fully
supports SISR specification, enabling the developer to use both "Script"
and "String Literal" tag syntaxes, for an easy yet powerful
EcmaScript-based Semantic Interpretation.
The support of SISR standard is also available in all Loquendo products
exploiting ASR, namely Loquendo Speech Suite, the client server solution
based on MRCP, as well as VoxNauta, the VoiceXML/CCXML voice platform
solution.

Loquendo implementation was run on an unchanged copy of the official
test set
http://www.w3.org/TR/2006/CR-semantic-interpretation-20060111/testarchiv
e20051112.zip.

Required features:
- All required features were implemented in conformity with the
specification, and the entire test set concerning them obtained a
successful result.
- The only slightly difference in Loquendo implementation is global
variable's behaviour. These variables, declared into header tags of a
grammar, are not read-only (they can be accessed but also modified by
the rules of the same grammar). Loquendo agrees and complies with the
assertion that global variables must not be shared among different
grammars, but thinks it can be useful for developers to share them among
rules defined in the same grammar.

Optional features:
- The optional "XML serialization" of the EcmaScript result was
implemented and produced expected output.
- The 'score' variable associated to each Rule variable was implemented
and successfully tested. The 'starttime' and 'endtime' variables are set
to undefined (associating an absolute timestamp to audio data is not
always feasible).

Regards,

Paola Rossi, Paolo Baggia, Patrizio Bergallo, Loquendo.


Gruppo Telecom Italia - Direzione e coordinamento di Telecom Italia S.p.A.

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