Patent ID: 8515258
Filing Date: 2013-08-20
Classification: G09B

Abstract:
1. A device for automatically recreating a content-preserving and compression-efficient lecture video, said device comprising a computer-based video recreating means connected to a video receiving means at an input side thereof and to a video reproducing means at the output side thereof, said video recreating means being designed to split said video into visual data and audio data; split said visual data into a plurality of scenes by determining scene breaks within the visual data; classify each scene based on activities including one or more of a talking head activity scene, a class room activity scene, a writing hand activity scene and a slide show activity scene; select activity scenes pre-determined to be critical for preserving the semantics of said lecture video; determine a key frame within said selected activity scenes; recreate the visual data by effecting a time based merger of the key frames of the selected activity scenes; recreate the audio data by retargeting it to remove voiceless data and noise therein; and recreate the lecture video by effecting a synchronized time based merger of said recreated visual data and audio data.