Graphics Reference
In-Depth Information
Figure 3.5:
Scalable encoder using a multi-scale pyramid with 3 levels of spatial scalability [40]
Spatialscalabilityisachievedusingamulti-layercodingapproachinpriorcodingstandards,
including MPEG-2 and H.263. Figure 3.5 shows a block diagram of a spatially scalable
encoder.Inthescalable extension of H.264/AVC, the spatial scalability is achieved with an
over-sampled pyramid approach. Eachspatiallayerofapictureisindependentlycodedusing
