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FIAT/IFTA World Conference 2016, October 12-15, Warsaw MPEG-21 User Description

The role of MPEG-21 User Descriptionin recommendation issues

Sabino Metta,RAI – Radiotelevisione Italiana

Centre for Research and Technological Innovation

FIAT/IFTA World Conference 2016“Rethink the future of AV”

October 12 to October 15, Warsaw


MPEG-21 User Description (MPEG-21 UD)*

Exchange and “horizontal” integration of metadata standards provided by recommendation engines of different stakeholders. This is aimed at enhancing recommending accuracy and improving the user experience.

(*) ISO/IEC DIS 21000-22: Information technology – Multimedia framework (MPEG-21) – Part 22: User Description. 2015


Recommendation Description (RD)

It includes: (i) subsets of UD/CD/SD, which are the actual recommended items together with information about what role these items play in the recommendation; (ii) additional logical relations linking recommended items (e.g. a ranked list specifying a preference order of the recommended items and other similar structures); (iii) descriptive metadata related to the recommended items.RD descriptors include e.g. the recommended objects and the services by which they are provided (such as an audio interview provided by a broadcaster's website), descriptive information about the recommended items or additional logical relations among the recommended items.

User Description (UD)

Description of the User seeking recommendation (UD).UD descriptors contain e.g. static and dynamic information about the user, the history of the user's interactions, preferences, security settings regarding these information, etc.

Context Description (CD)

Description of the Context in which the User operates (CD).CD descriptors provide information about the user operational environment, such as the used device, physical position, temperature, humidity, sound level, etc.

Service Description (SD)

Description of Services offering content sought by the User (SD).SD descriptors contain information about the service (or a set of sub-services), that is offered to the end-user application (e.g. music tracks on demand, newscasts, etc) and the objects (e.g., multimedia items) offered by the service

Conceptual Model of MPEG-21 UD.UD/CD/SD/RD (red) indicate the formats specified by MPEG-UD.

Description Managers, Recommendation Engine andApplication (black) are out of the scope of the standard


Interoperable Rec. Engines

Even if the Service Provider can have its own internal Recommendation Engine, it can request the auxiliary functionalities of n different and external Recommendation Engines in order to enhance the user experience with richer information.According to the policies set by the user in terms of availability of his/her information to external applications, the Service Provider can forward UD, CD descriptions (or subsets of them) and its own SD description to these Engines. At this point, according to an internal integration logic, the Service Provider can integrate the received items and return to the user an enhanced recommendation service


EBU RecSys. December 1 and 2, 2015 – Yle (Helsinki)

The role of MPEG-21 User Description in recommendation issues

RAI - Radiotelevisione italiana14 TV channels,10 Radio stations and44 web sites.

Multimedia services are offered for news, entertaiment, movies, fiction, cartoons, sport, culture, arts, etc


Several RAI apps are currently available on different platforms:

iPhone, iPad, Windows Phone, Android Phone, Android Tablet, Blackberry, Kindle Fire, Smart tv (Samsung), MHP.

CLOSED and SEPARATED !

http://ww

w.rai.it/dl/rai/appM

obile.html?refresh_ce


http://ww

w.rai.it/dl/rai/appM

obile.html?refresh_ce

Such service descriptions can be exploited by a generic (or more than one) engine thus making intraoperable different RAI applications.


Sabino MettaRAI – Radiotelevisione Italiana

Centre for Research and Technological [email protected]

mailto:[email protected]

Data & Analytics

data - driven journalism 2