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Fast Intermode Decision in H.264/AVC Video Coding

Fast Intermode Decision in H.264/AVC Video Coding. D. Wu , F. Pan , K. P. Lim , S. Wu , Z. G. Li , X. Lin , S. Rahardja , and C. C. Ko 老師 : 楊士萱 博士 學生 : 陳柏源 碩二. ave. Timesaving : 30% ave. PSNR loss : 0.03 dB. Outline (1/1). H.264 encoder configuration

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Fast Intermode Decision in H.264/AVC Video Coding

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  1. Fast Intermode Decision in H.264/AVC Video Coding D. Wu , F. Pan , K. P. Lim , S. Wu , Z. G. Li , X. Lin , S. Rahardja , and C. C. Ko 老師: 楊士萱 博士 學生: 陳柏源 碩二

  2. ave. Timesaving : 30% ave. PSNR loss : 0.03 dB Outline (1/1) • H.264 encoderconfiguration • Macroblock Partition • Intermode Decision in H.264/AVC • Fast Intermode Decision method • Fast Intermode Decision Algorithm • Experimental Results • Reference

  3. H.264 encoder configuration (1/1) Figure 1. Encoder configuration

  4. Figure 2. Frame partitions Figure 3. Macroblock partitions Macroblock Partition (2/1)

  5. Macroblock Partition (2/2)-blocksize selection={16x16 , 8x16 , 16x8 , 8x8 , 4x8 , 8x4 , 4x4} Figure 4. QCIF ( News) Figure 5. CIF (Paris)

  6. Intermode Decision in H.264/AVC (3/1)-blocksize selection={16x16 , 8x16 , 16x8 , 8x8 , 4x8 , 8x4 , 4x4} Figure 6. Encoder configuration

  7. Intermode Decision in H.264/AVC (3/2) • MV : Table 1. MPEG4 Motion Vector Difference (MVD) Figure 7. Motion Estimation

  8. Intermode Decision in H.264/AVC (3/3) • Lagrangian Function : • SSD : • Lunda : • R(s,c,MODE|QP) : Number of bits (MODE & QP) For P-fram For B-fram

  9. Method (3/1) -Homogenity (Sobel edge detection) • Edge vector : • Vertical : • Horizontal : • Amplitude : • Homogeneous decision :

  10. Method (3/2) -Stationary • Sum of absolute diff. : • Stationary :

  11. Method (3/3) -blocksize selection={16x16 , 8x16 , 16x8 , 8x8 , 4x8 , 8x4 , 4x4} Figure 8. QCIF ( News) Figure 9. CIF (Paris)

  12. Algorithm (1/1) 16x16 : THdH=20,000 8x8 : THdH=5000 Ts=200

  13. Experimental Results (4/1) TABLE I Results For IPPP Sequences TABLE II Results For IBBP Sequences

  14. Experimental Results (4/2) TABLE III Result For “Mobile” (IPPP) TABLE IV Result For “Mobile” (IBBP)

  15. Experimental Results (4/3) Figure 10. News (IPPP) Figure 11. Mobile (IPPP)

  16. Experimental Results (4/4) Figure 12. News (IBBP) Figure 13. Mobile (IBBP)

  17. D. Wu , F. Pan , K. P. Lim , S. Wu , Z. G. Li , X. Lin , S. Rahardja , and C. C. Ko, “ Fast Intermode Decision in H.264/AVC Video Coding “,IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS FOR VIDEO TECHNOLOGY, VOL. 15, NO. 6,JULY 2005 Reference

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