22 nd January 2004 UITV 2004 NewsBoy: an interactive news retrieval system Joemon M Jose The Information Retrieval Group Department of Computing Science University of Glasgow -

Outline Background Online News retrieval Scenario Personalisation and Presentation Strategies System interface Future Work

Background news programmes Multiple channels Regular update Information overload User requirement May not be interested in all news Need an overview Interested in selected topics Interested in latest news

Information Retrieval Users information need (Query) Retrieval strategies Interactive issues Browsing, results presentation Embedded in other applications Personalisation Adaptive, context sensitive retrieval Online news retrieval

NewsFlash System We present a world exclusive - Saddam Hussein in his own words….At the weekend, the veteran labour politican Tony Benn travelled to Baghdad to meet and interview the Iraqi President….You are conscious of the role that Iraqis have set out for themselves, inspired by their own culture, their civilization and their role in human history…. Having said that, the Iraqis are committed to their rights as much as they are committed to the rights of others

Video Indexing & Retrieval Video programmes + Subtitles Hauppauge video capture card AVI file format, DivX codec Video Shot segmentation Result of a single camera action Colour histogram based approach Shot, subtitle alignment Using time stamp in subtitles Key frame extraction thumbnails

Retrieval and summarisation Shot + Corresponding teletext is considered as a document Vector Space retrieval model Representation using term vectors Query is represented using query term vectors Cosine similarity match Query based summary generation Summary of a document Tailored with respect to the query

NewsFlash System We present a world exclusive - Saddam Hussein in his own words….At the weekend, the veteran labour politican Tony Benn travelled to Baghdad to meet and interview the Iraqi President….You are conscious of the role that Iraqis have set out for themselves, inspired by their own culture, their civilization and their role in human history…. Having said that, the Iraqis are committed to their rights as much as they are committed to the rights of others

Scenario TV Broadcasts set-top box Users Information overload Wants to see only interesting news Couch potato culture Remote control based interaction No keyboard, Relaxed environment

Strategy/Issues Simple interaction strategies Couch potato environment Intuitive browsing Remote Control Up and down arrows Colour coding Selection buttons Personalisation

User side… Wants to know late breaking news Plane crash somewhere … Any major events Users have interests Capturing their interests Glasgow news, war on terrorism, football news etc. Needs to capture their profiles User specific input From interaction Needs to know about something

Document Clustering We cluster shots into groups Single pass clustering Based on the subtitles As a result, we can present the daily news as groups of shots Each group contains shots belongs to same topic Crude story segmentation

04/03/2003iTV15 Learning Techniques Identify patterns of usage If a person continuously accessing Glasgow weather reports Then he/she is interested in that topic Prioritise/weight areas of interest Present according to priority Present late breaking news Role of clustering

Profile Learning Self-adaptive profile Adapt without explicit feedback Capture the profile with multiple factors A profile P is comprised of a set of profiles p i If a user views a document then that is used as an indication of interest Similar to single pass clustering Strength of profiles

Presentation of personal news News shots are grouped with respect to the profiles Highest strength profiles are shown first

Evaluation Issues Interaction strategies Retrieval effectiveness Quality of profiles User satisfaction Task based user-centred evaluation Provide scenarios of usage Continuous usage over a week Logging and questionnaire based data capture

Future Work Topic & Event detection Use of IR techniques Story Segmentation Personalisation techniques Adaptation within search sessions Long term adaptation Group Personalisation Integration with Internet Evaluation Strategies