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Impressum |
This page is under construction. At the moment it is mostly a collection of facts that are scattered in the standard and that I find useful in this compilation ...
If you want to learn more I recommend some good Books.
The visual part of MPEG-4 defines not only a video coder but also a still image coder and tools for synthetic video objects:
Only the video coder is covered in the following.
| Tool | Profile | ||||
| Simple | Advanced Simple |
Core | Simple Scalable |
Advanced Coding Efficiency |
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| I VOP | x | x | x | x | x |
| P VOP | x | x | x | x | x |
| B VOP | x | x | x | x | |
| Short Header | x | x | x | x | x |
| AC/DC Prediction | x | x | x | x | x |
| 4 MV / Unrestricted MV | x | x | x | x | x |
| Video Packet Resynchronisation | x | x | x | x | x |
| Data Partitioning | x | x | x | x | x |
| Reversible VLC | x | x | x | x | x |
| H.263 / MPEG-2 Quantization | x | x | x | ||
| Global Motion Compensation | x | x | |||
| Quarter-Pel Motion Compensation | x | x | |||
| Temporal Sacalbility | x | ||||
| Spatial Sacalbility | x | ||||
| Binary Shape | x | x | |||
| Greyscale Shape | x | ||||
| Shape Adaptive DCT | x | ||||
| Interlace | x | x | x | ||
Only Simple Profile and Advanced Simple Profile are covered in the following table. Note that additional restrictions apply to level 0 and 0b.
The values given in the rows with bold headings are determined by the standard, the other rows show derived parameters.
| Profile, Level | SP, L0 | SP, L0b | SP, L1 | SP, L2 | SP, L3 | ASP, L0 | ASP, L1 | ASP, L2 | ASP, L3 | ASP, L3b | ASP, L4 | ASP, L5 |
| Max. Bitrate (kbit/s) | 64 | 128 | 64 | 128 | 384 | 128 | 128 | 384 | 768 | 1500 | 3000 | 8000 |
| Max. Buffer (kbit) | 160 | 320 | 160 | 640 | 640 | 160 | 160 | 640 | 640 | 1040 | 1280 | 1792 |
| Max. Delay @ max. Bitrate (sec) | 2.5 | 2.5 | 2.5 | 5 | 1.66 | 1.25 | 1.25 | 1.66 | 0.86 | 0.69 | 0.43 | 0.22 |
| Max. VP Size (bit) | 2048 | 2048 | 2048 | 4096 | 8192 | 2048 | 2048 | 4096 | 4096 | 4096 | 8192 | 16384 |
| Max. VOP Size (MB) | 99 | 99 | 99 | 396 | 396 | 99 | 99 | 396 | 396 | 396 | 792 | 1620 |
| Max. Decoder Rate (MB/s) | 1485 | 1485 | 1485 | 5940 | 11880 | 2970 | 2970 | 5940 | 11880 | 11880 | 23760 | 48600 |
| Max. Framesize @ 30Hz | - | - | 128x96 | 256x192 | CIF | QCIF | QCIF | 256x192 | CIF | CIF | 352x576 704x288 |
720x576 |
| Max. Framesize @ 25Hz | - | - | 144x96 | 304x192 288x208 |
CIF | QCIF | QCIF | 304x192 288x208 |
CIF | CIF | 352x576 704x288 |
720x576 |
| Max. Framesize @ 24Hz | - | - | 160x96 | 304x208 | CIF | QCIF | QCIF | 304x208 | CIF | CIF | 352x576 704x288 |
720x576 |
| Max. Framesize @ 15Hz | QCIF | QCIF | QCIF | CIF | CIF | QCIF | QCIF | CIF | CIF | CIF | 352x576 704x288 |
720x576 |
| Max. Framesize @ 12.5Hz | QCIF | QCIF | QCIF | CIF | CIF | QCIF | QCIF | CIF | CIF | CIF | 352x576 704x288 |
720x576 |
| Tool | Profile | ||||||
| Baseline | Main | Extended | High | High 10 | High 4:2:2 | High 4:4:4 | |
| I Frame | x | x | x | x | x | x | x |
| P Frame | x | x | x | x | x | x | x |
| B Frame | x | x | x | x | x | x | |
| SI Frame | x | ||||||
| SP Frame | x | ||||||
| Multiple Reference Frames | x | x | x | x | x | x | x |
| Deblocking Filter | x | x | x | x | x | x | x |
| CAVLC | x | x | x | x | x | x | x |
| CABAC | x | x | x | x | x | ||
| FMO, ASO, RS | x | x | |||||
| Data Partitioning | x | ||||||
| Interlaced | x | x | x | x | x | x | |
| 4:2:0 Chroma Format | x | x | x | x | x | x | x |
| 4:2:2 Chroma Format | x | x | |||||
| 4:4:4 Chroma Format | x | ||||||
| 8 Bit Sample Depth | x | x | x | x | x | x | x |
| 9 and 10 Bit Sample Depth | x | x | x | ||||
| 10 and 12 Bit Sample Depth | x | ||||||
| 8x8 vs. 4x4 Transform | x | x | x | x | |||
| Quantization Scaling Matrices | x | x | x | x | |||
| Separate Cb and Cr QP control | x | x | x | x | |||
| Monochrome Video Format | x | x | x | x | |||
| Residual Color Transform | x | ||||||
| Predictive Lossless Coding | x | ||||||
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Impressum |