a, control: Code stream structure of H.263
The code stream structure defined by H.263 is a hierarchical structure, a total of four layers. Since the top and bottom, the image layer (GOB Layer), a macroblock layer, and a block layer (Block Layer).
PSC TR PTYPE PQUANT CPM PSBI TRB DBQUANT
Pei
PSPare
Pei
Group of Blocks Estuf EOS PSTUF Figure 1.1 Image layer structure
Gstuf GBSC GN GSBI GFID GQUANT MACROBLOCK DATA
Figure 1.2 GOB layer structure
COD MCBPC MODB CBPB CBPY DQUANT MVD
MVD2 MVD3 MVD4 MVDB block data
Figure 1.3 macroblock structure
INTRADC TCOEF Figure 1.4 block structure
B, H.264's code stream structure H.264's code stream structure and H.263 have a big difference, which is no longer a strict hierarchical structure.
