Image Processing Reference
In-Depth Information
Advanced Coding Efficiency, Core Scalable, and Advanced Real-Time Simple
Natural Visual Profiles were introduced at version 2.
●
Level 3b is introduced by a late-breaking amendment.
●
G.3.4
Levels and Macroblocks
The MPEG-4 specification does not dictate frame sizes in pixels. Because the video can be
arbitrarily shaped, the limit is defined in terms of 16-
16-pixel macroblocks, which can be
presented in non-rectangular arrangements. Table G-5 summarizes these values for some
profiles and levels.
×
Table G-5 Levels Versus Macroblocks
Profile
Level
Max macroblocks
Shape coding
Simple
0
99
Simple
1
99
Simple
2
396
Simple
3
396
Advanced Real-Time Simple
1
99
Advanced Real-Time Simple
2
396
Advanced Real-Time Simple
3
396
Advanced Real-Time Simple
4
396
Simple Scalable
1
495
Simple Scalable
2
792
Core
1
198
√
Core
2
792
√
Advanced Core
1
198
Advanced Core
2
792
Core Scalable
1
792
√
Core Scalable
2
990
√
Core Scalable
3
4032
√
Main
2
1188
√
Main
3
3240
√
Main
4
16320
√
Advanced Coding Efficiency
1
792
√
Advanced Coding Efficiency
2
1188
√
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