Learn about the popular H.264 / MPEG-4 Advanced Video Compression standard.

1. An introduction to H.264 Advanced Video Compression Iain Richardson 22 nd March 2010 V CODEX

4. Video compression H.264 MPEG-4 MPEG-2 Broadcast Digital TV DVD / Blu-Ray IPTV Web Video Mobile Video …… ……

8. Digital video Displayed frame Luma (Y) Chroma (Cb) Chroma (Cr)

9. Macroblock

10. H.264 Encoder

11. H.264 decoder

12. Prediction

13. Intra prediction

15. Inter prediction

17. H.264 Encoder

18. Inverse Transform

19. Forward Transform

20. Forward Quantize

21. Forward Transform + Quantize Block of samples Integer transform Quantized, QP=18 961 -41 15 -48 -34 72 -30 -104 -15 3 15 24 13 81 -5 8 58 64 51 58 52 64 56 66 62 63 61 64 59 51 63 69 48 -1 0 -1 -1 1 -1 -2 0 0 0 0 0 1 0 0

22. Inverse Quantize

23. Inverse Transform

24. Block of samples Quantized, QP=18 Rescaled + inverse transformed 58 64 51 58 52 64 56 66 62 63 61 64 59 51 63 69 48 -1 0 -1 -1 1 -1 -2 0 0 0 0 0 1 0 0 55 66 54 58 54 62 58 63 61 59 61 62 60 55 65 67

25. About the Integer Transform 1-D Discrete Cosine Transform 1-D Integer Transform 1 1 1 1 2 1 -1 -2 1 -1 -1 1 1 -2 2 -1 0.5 0.5 0.5 0.5 0.6532… 0.2706… -0.2706… -0.6532… 0.5 -0.5 -0.5 0.5 0.2706… -0.6532… 0.6532… -0.2706…

26. H.264 Encoder

27. Entropy coding Headers Prediction parameters Quantized coefficients Fixed length codes Exp-Golomb codes Context Adaptive Variable Length Codes Context Adaptive Binary Arithmetic Codes

32. …… etc

33. Profiles and Levels

37. intra inter (forward) skip