A System for Analysis and Presentation of MPEG Compressed Newsfeeds

In this paper an iterative algorithm for extraction of key frames from digitised MPEG-1 compressed newsfeeds is introduced. Newsfeeds consist of assembled news clips transmitted by news agencies. These are usually recorded in analogue form by subscribing TV stations. Editors analyse the video material through a sequential and time intensive search in order to select sequences which can be used in a newscast. Digital video techniques can enhance this process. In order to find changes in information run the video stream is examined with a multi-level algorithm resulting in a key frame index of each clip. A key frame represents a sequence of similar frames and a set of key frames gives an overview of clip content. Key frames can be combined with additional information obtained from, for example, the internet. News editors can interactively navigate through a whole day’s material of all the newsfeeds recorded.