Speech Application Language Tags : Seminar Report and PPT
Advances in several fundamental technologies
are making possible mobile computing platforms of unprecedented power. In the
speech and voice technology business fields SALT has been introduced as a new
tool. SALT supplies a critical missing component, facilitating intuitive speech-based
interfaces that anyone can master. Verizon Wireless has joined the SALT Forum
to make speech applications more accessible to wireless customers. 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. 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.
SALT is a speech interface markup
language. SALT (Speech Application Language Tags) is an extension of HTML and
other markup languages (HTML, XHTML, WML) that adds a powerful speech interface
to Web pages, while maintaining and leveraging all the advantages of the Web application
model. These tags are designed to be used for both voice-only browsers (for example,
a browser accessed over the telephone) and multimodal browsers. SALT (Speech Application
Language Tags) is a small set of XML elements, with associated attributes and
DOM object properties, events, and methods, which may be used in conjunction with
a source markup document to apply a speech interface to the source page. The SALT
formalism and semantics are independent of the nature of the source document,
so SALT can be used equally effectively within HTML and all its flavors, or with
WML, or with any other SGML-derived markup. SALT targets speech applications across
a wide range of devices including telephones, PDAs, tablet computers and desktop
PCs. As all these devices have different methods of inputting data SALT has taken
this also into consideration.
provides a multimodel access in which users will be able to interact with an application
in a variety of ways: input with speech, a keyboard, keypad, mouse and/or stylus;
and output as synthesized speech, audio, plain text, motion video and/ or graphics.
Each of these modes could be used independently or concurrently. For example,
a user might click on a flight info icon on a device and say "Show me the
flights from San Francisco to Boston after 7 p.m. on Saturday" and have the
browser display a Web page with the corresponding flights.
are mainly three major challenges that SALT will help address.
Input on wireless devices:
Wireless devices are becoming pervasive, but lack
of a natural input mechanism hinders adoption as well as application development
on these devices.
2. Speech-enabled application
Speech-enabled integration between existing Web browser software,
server and network infrastructure and speech technology, SALT will allow many
more Web sites to be reachable through telephones.
There are 1.6 billion telephones in the world, but
only a relatively small fraction of Web applications and services are reachable
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