[July 15, 2002]
SALT Forum Publishes Speech Application Language
Tags Specification Version 1.0
The SALT Forum, a group of
companies with a
shared goal of accelerating the use of speech technologies in multimodal
and telephony systems, announced the availability of Version 1.0
of the Speech Application Language Tags (SALT) specification. This
achievement provides the first complete definition of the SALT
specification suitable for deployment of multimodal and telephony
applications. Version 1.0 is published on the SALT Forum website, www.saltforum.org,
marking the conclusion of the SALT specification's
first development phase.
"The SALT 1.0 specification provides application developers with a
documented way to leverage existing Web markup languages," said
Daniel
Miller, senior vice president of Voice & Wireless Commerce for The
Kelsey Group. "Its release by the SALT Forum marks a major milestone
that should accelerate integration of automated speech, multimodal and
telephony applications."
Advances in several fundamental technologies are making possible mobile
computing platforms of unprecedented power. SALT supplies a critical
missing component, facilitating intuitive speech-based interfaces that
anyone can master. The result is a wealth of new opportunities to serve
millions of consumers with compelling content and applications.
"Verizon
Wireless is pleased to join the SALT Forum to make speech applications
more accessible to wireless customers," said Jim Straight, Vice
President for Wireless Data and Internet Services at Verizon Wireless.
"We expect that the SALT 1.0 specification will help to accelerate
deployment of multimodal applications and provide a more natural user
interface for mobile devices."
The SALT specification defines a set of lightweight tags as extensions
to commonly used Web-based programming languages, strengthened by
incorporating existing standards from the World Wide Web Consortium
(W3C) and the Internet Engineering Task Force (IETF). This allows
developers to add speech interfaces to Web content and applications
using familiar tools and techniques. In multimodal applications, the
tags can be added to support speech input and output either as
standalone events or jointly with other interface options such as
speaking while pointing to the screen with a stylus. In telephony
applications, the tags provide a programming interface to manage the
speech recognition and text-to-speech resources needed to conduct
interactive dialogs with the caller through a speech-only interface. The
SALT specification is designed to work equally well on traditional
computers, handheld devices such as PDAs, home electronics such as video
recorders, telematics devices such as in-car navigation systems, and
communications devices such as mobile phones.
Version 1.0 of the SALT specification covers three broad areas of
capabilities: speech output, speech input and call control. The
specification's "prompt" tag allows SALT-based applications to
play
audio and synthetic speech directly, while "listen" and
"bind" tags
provide speech recognition capabilities by collecting and processing
spoken user input. In addition, the specification's call control object
can be used to provide SALT-based applications with the ability to
place, answer, transfer and disconnect calls, along with advanced
capabilities such as conferencing. The SALT specification draws on
emerging W3C standards such as Speech Synthesis Markup Language (SSML),
Speech Recognition Grammar Specification (SRGS) and semantic
interpretation for speech recognition to provide additional application
control. Following previously announced plans, the SALT specification is
being submitted to an established international standards body to
provide the basis of an open, royalty-free standard for speech-enabling
multimodal and telephony applications.
Development of the SALT specification proceeded at a rapid pace thanks
to the conscientious efforts of more than 50 Forum members, spanning the
industry value chain and representing companies of every size from
around the world. The Contributors that most recently joined the SALT
Forum include Aliant Telecom, Cambridge VoiceTech, Carnegie Mellon
University, Fonix Corporation, InfoTalk Corporation, Multi-Modal
Technologies, SnowShore Networks and Verizon Wireless.
"The SALT Forum has proven to be uniquely effective in its mission
to
swiftly address the technical challenges associated with speech-enabling
Web content and applications," said SALT Forum representative Rob
Kassel. "Now that Version 1.0 of the SALT specification is completed,
web developers can begin fulfilling the promise of providing information
access through speech anytime, anywhere, in an increasingly mobile
world."
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