| 摘要 |
An encoder device (SE) allows generating, starting from a sequence (IS) of digital video pictures, a time-scalable encoded bitstream (SB) obtained by applying to the pictures a hierarchical prediction (P) wherein the pictures are organised in Groups Of Picture or GOPs including:
- base time layer (L0) pictures, designated Key Picture and suitable for encoding a Inter or Intra, with and without motion-compensated prediction respectively,
- higher time layer (L1, L2, L3) pictures, adapted to be selectively eliminated to effect time scalability of the encoded scalable bitstream (SB).
Carried out for such purpose is the detection (IB) of the possible presence of scene changes (SC) in the sequence (IS) of digital video pictures, and, in the presence of a scene change (SC), the first Key Picture after the scene change (SC) is in any case encoded (120) as Intra (I0). |
