0845 287 7615, exodus.co.uk In recent years Northern Ireland has made its mud-splattered mark on the outdoor activity scene with new networks of canoe (canoeni.com) and mountain biking (mountainbikeni.com) trails.
If a scene has an average bit rate that is greater than the average bit rate of the whole movie, then it is classified as a high-activity scene, else it is classified as a low-activity scene.
Also, an even smaller value of a is used for the scenes that immediately follow a change in activity (i.e., the first high activity scene after a low→high transition, and the first low activity scene after a high→low transition); the reason is that after such a transition, the change in video content is the largest, therefore video packet losses are the most costly in terms of user irritation.
The multi-modal events/features used in the proposed highlights generation system are the following: slow motion replay, camera motion activity, scene cut density, and excitement in commentators' speech.
But within his mind, behind his placid expression, the world was clearly swirling with activity, scenes as extraordinary and subtle, and perhaps as fantastic, as the shadow-puppet shows he loves.
More specifically, different values of a are used for high activity scenes (smaller α, i.e., larger irritation) than for lower activity scenes.
Due to the use of much smaller α values in high activity scenes and in scene activity changes, the different behavior of the system with the use of the 2nd SUIF is accentuated.
For each mean value of α, a HAS for high activity scenes is set to be 20% smaller than the mean, a LAS for low activity scenes to be 20% larger than the mean and a SC for the first scene after a change in activity to be half the mean value.
However, contrary to [7, 8] where α is considered to be a constant, in this work we exploit our video traffic model's ability to distinguish between high and low activity scenes.
We take advantage of the new model's ability to distinguish between high and low activity scenes, in order to change the definition of the Sigmoid function used in [7, 8] for representing user satisfaction.
