How Does H.264 SVC Work?
H.264 SVC provides the scalability described previously by building video streams out of individual, complementary layers. This all starts with the base layer, which has the lowest resolution and frame rate that can be displayed. Enhancement layers are then provided as needed, which will provide higher quality to endpoints that request it. Again, these enhancement layers are complementary, so when combined with the base layer, the video resolution and frame rate are increased. This is best described in the form of a diagram, as shown in Figure 19.1.
Figure 19.1. H.264 SVC layering example.
In this example, a PC endpoint ...
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