Patent ID: 8964842
Filing Date: 2015-02-24
Classification: H04N

Abstract:
1. A method of generating, from a sequence of digital video pictures, a time-scalable encoded bitstream by applying to the digital video pictures a hierarchical prediction, each digital video picture having a time layer associated therewith, and each digital video picture being predicted using motion-compensation so that each digital video picture of a time layer L n uses digital video pictures of time layers L m with m≦n, the digital video pictures being arranged in Groups Of Pictures (GOPs) comprising key pictures in a base time layer for being encoded as one of inter coded with motion-compensated prediction and intra coded without motion-compensated prediction, and higher time layer pictures for being selectively eliminated to effect time scalability of the time-scalable encoded bitstream, the GOPs having a number N of pictures associated therewith, the method comprising: detecting a scene change in the sequence of digital video pictures; encoding as intra coded, a key picture after the detected scene change, while maintaining the time layer of each digital video picture; if no scene change is detected if a scene change is detected