Digital Signal Processing Reference
In-Depth Information
is not overwhelmed with synthesized
information of a POI but may
explore only the desired information.
POIs will be enriched with information about opening hours, tickets and
phone numbers.
Other functionalities are planned to expand the current prototype as follows:
the database will contain the car manual, hierarchically organized to
allow consultation via a speech interaction.
when the Internet connection will be available, the database will contain a
dynamic part which automatically downloads news from various web sites
and which is able to show the user the latest news according to his/her
preferences (finance, weather, politics, etc.).
all the information that concerns user habits and preferences will be
stored in a user profile database and loaded by the Dialog Manager during
dialogue start-up.
3.
EXPERIMENTAL SETUP
Some recognition experiments were conceived to evaluate the
convenience of using multiple recognition units in order to increase the
system performance without reducing the language coverage. Another aspect
under investigation is the reliability of the sentence likelihood as score for the
selection of the most promising recognized sentence among the unit outputs.
Data were collected with the “Wizard of Oz” (WOZ) technique. This
method allowed to acquire speech of real drivers using an apparently fully
functioning system (the
codriver
), whose missing recognition capabilities
were supplied by an hidden human operator (the
wizard
).
3.1
WOZ Database
An Italian WOZ-based data collection was organized in order to
reconstruct a real situation in which the driver tries to fulfill, by voice
interaction, tasks as:
Reach a Point-Of-Interest (POI) in Trento city
ask for hotel/restaurant information and topic a room or reserve a table
ask information about the car
ask information about a museum, a church, etc.
