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Enhancing Video Quality with DIS-H.264 Integration

Learn how to combine DIS for video stabilization and H.264 for improved coding efficiency. Explore architectures, motion estimation techniques, and address issues for future work.

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Enhancing Video Quality with DIS-H.264 Integration

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  1. H.264 and DIS 指導教授：楊士萱　老師 學生：鄭馥銘

  2. Outline • Introduction of DIS • Combine DIS and H.264 • Some problem for combination issue • Future work

  3. Outline • Introduction of DIS • Combine DIS and H.264 • Some problem for combination issue • Future work

  4. Introduction • Why use DIS in video-footage device • Video footage from hand-held camera is typically jerky due to small,unwanted camera movements. • We present a video stabilization algorithm aimed to produce a compensated video sequence so that the camera’s undesirable shake or jiggle can be removed.

  5. Categories of DIS • Mechanical-Optical system • Mechanical-Digital system • Fully Digital system

  6. Architecture of DIS - 1 • Pre-processing Diadv ：Need additional memory、sensor、chip input output Stabilization Video-Encoder Video-Decoder

  7. Architecture of DIS - 2 • Post-processing Adv：No motion estimation computation Disadv：Coding efficiency can not be increased Stabilization input output Video-Encoder Video-Decoder

  8. Architecture of DIS - 3 • Combine-Encoder • Adv：Save memory、sensor、chip、Coding efficiency can be increased。 • Disdv ：？ Stabilization input output Video-Encoder Video-Decoder

  9. Summarize the goal of DIS-system • Combine DIS and H.264 Encoder • Our DIS using block-base ME is suited with encoder so that DIS can immediate get MV form encoder. • Coding efficiency can be increased • Jitter can be removed

  10. Outline • Introduction of DIS • Combine DIS and H.264 • Some problem for combination issue • Future work

  11. H.264 Baseline Profile • Free to use • Tools • I Slice • P Slice • CAVLC • Slice Group • Redundant Slice

  12. Review of DIS system Block-Blased Motion Estimation MVs MV Validation LMVs FMV Generation FMV Hand – shake Estimation SMV , HMV , AMV Motion correction

  13. H.264 Encoder Architecture

  14. Review of DIS system Block-Blased Motion Estimation MVs MV Validation LMVs FMV Generation FMV Hand – shake Estimation SMV , HMV , AMV Motion correction

  15. H.264 Encoder Architecture

  16. ME - In DIS system • MB Size

  17. ME - In DIS system

  18. ME - In DIS system • Reference picture management • Short term • Long term

  19. ME - In DIS system • Pixel Resolution • Full pixel • Half pixel • Quarter pixel

  20. ME - In DIS system • H.264 Main profile • B Slice

  21. ME - In DIS system • H.264 Main profile • Interlaced

  22. ME - In DIS system • Slice group • Ex 1：interlace • Ex 2：foreground & background

  23. Combine DIS system and H.264 Block-Blased Motion Estimation Block-Blased Motion Estimation MVs MV Validation MVs LMVs Hand – shake Estimation FMV Generation FMV Hand – shake Estimation SMV , HMV , AMV SMV , HMV , AMV Motion correction Motion correction

  24. H.264 Encoder Architecture HE

  25. Combine DIS system and H.264 Block-Blased Motion Estimation MVs Hand – shake Estimation SMV , HMV , AMV Motion correction

  26. H.264 Encoder Architecture HE Motion Correction ?

  27. Outline • Introduction of DIS • Combine DIS and H.264 • Some problem for combination issue • Future work

  28. Some problem of combination issue • Where to place Motion Correction module • What we need • MV buffer • Delay residual coding

  29. DIS-H.264 system architecture-1 MV Buffer HE Motion Correction

  30. Some problem of combination issue • DIS-H.264 system architecture-1 • Maybe jitter can be removed • But it does not increase coding efficiency

  31. Remark of combination issue • Shifting frame to stable position（Motion Correction） before motion estimation, in order to increase coding efficiency. • Shifting frame to stable position（Motion Correction） before motion estimation ,Because the size of reference frame is smaller than current frame.

  32. Zoran DIS-MPEG4 system

  33. Future work • Ability to modify reference software program • To assess the effects of DIS-H.264 system

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