Study and comparison between H 264 MPEG4 AVC and AVS China Siddaraju By Naveen naveen siddaraju mavs uta edu Under the guidance of Dr K R Rao Contents Introduction Brief overview of H 264 Brief overview of AVS China Comparison Results Introduction H 264 MPEG 4 AVC Latest video coding standard Basic design architecture is similar to previous MPEG standards Better compression efficiency Motion compensated coding structure Picture slices MBs subMBs blocks pixels I P and B slices Derived slices SI and SP Different YUV systems in H 264 16 Profiles and levels in H 264 Baseline profile Main profile Extended profile High profiles H 264 Profiles Coding parts 1 Intra prediction in H 264 Uses adaptive spatial prediction to reduce spatial redundancy 4 X 4 luma 8X8 luma used in high profile 9 modes 16 X 16 luma 4 modes 4 X 4 chroma 4 modes H 264 intra prediction modes for 4X4 luma H 264 inter prediction Uses Motion estimation and Motion compensation MC Used to reduce temporal correlation 1 macroblock partition of 16 16 luma samples and associated chroma samples Macroblock partitions 2 macroblock partitions of 16 8 luma samples and associated chroma samples 2 macroblock partitions of 8 16 luma samples and associated chroma samples 0 0 0 Sub macroblock partitions 2 sub macroblock partitions of 8 4 luma samples and associated chroma samples 2 sub macroblock partitions of 4 8 luma samples and associated chroma samples 0 0 0 1 0 1 2 3 1 1 1 sub macroblock partition of 8 8 luma samples and associated chroma samples 4 sub macroblocks of 8 8 luma samples and associated chroma samples 4 sub macroblock partitions of 4 4 luma samples and associated chroma samples 0 1 2 3 1 H 264 encoder 1 H 264 decoder 1 De blocking filter Is used to reduce the blocking artifacts Two sources of the blocking arifacts 4 X 4 transform motion compensated prediction since the filter is present in the loop it prevents the propagation of the blocking artifacts Entropy coding quantized values and other syntax elements into actual bits CAVLC and CABAC for quantized coefficients Exp Golomb codes for syntax elements which are not coded by CABAC or CAVLC AVS China Latest audio video coding standard from China Standardization includes system audio video and digital copyright management Goal to achieve coding efficiency with reduced complexity AVS Parts 3 AVS layered data structure 3 for 4 2 0 video sequence AVS P2 encoder 5 AVS decoder AVS motion estimation and intra prediction AVS uses adaptive modes for motion compensation at the picture layer and the macroblock layer The modes in picture layer are Forward prediction from the most recent reference frame Forward prediction from the second most recent prediction frame Interpolative prediction between the most recent reference frame and a future reference frame Intra coding AVS motion estimation and intra prediction cont At the macroblock layer the modes depend on the picture mode In Intra pictures all macroblocks are intra coded In Predicted pictures macroblocks may be forward predicted or intra coded In interpolated pictures macroblocks may be forward predicted backward predicted interpolated or intra coded Predicted pictures P pictures Interpolated Pictures B Pictures AVS intra prediction 7 Comparison H 264 and AVS video Rate control Block A rate control algorithm dynamically adjusts encoder parameters to achieve a target bitrate quantization parameter QP Encoder with and without rate control block Bitrate Vs QP results H 264 JM 16 1 used 9 AVS RM09 01 10 Input sequence QCIF foreman 90 frames 20 JM 16 1 output JM 16 1 output JM 16 1 output AVS ref software output AVS ref software output Bitrates Vs psnr Plot PSNR vs bit rate Conclusion AVS P2 jizhun profile is comparable with the main profile of H 264 Reduced complexity reduced costs Performance difference is mainly due to absence of tools such as CABAC List of acronyms used Thank you References 1 Soon kak Kwon et al Overview of H 264 MPEG 4 Part 10 pp 186 216 Special issue on Emerging H 264 AVC video coding standard J Visual Communication and Image Representation vol 17 pp 183 552 April 2006 2 A Puri et al Video coding using the H 264 MPEG 4 AVC compression standard Signal Processing Image Communication vol 19 pp 793 849 Oct 2004 3 W GAO et al AVS The Chinese next generation video coding standard NAB Las Vegas 2004 4 X Wang et al Performance comparison of AVS and H 264 AVC video coding standards J Comput Sci Technol Vol 21 No 3 pp 310 314 J May 2006 5 L Yu et al An Overview of AVS Video tools performance and complexity Visual Communications and Image Processing 2005 Proc of SPIE vol 5960 pp 596021 July 31 2006 6 D Chang MPEG 4 H 264 compression standards ppt http mmlab snu ac kr 7 L Yu et al An area efficient VLSI architecture for AVS intra frame encoder Visual Communications and Image Processing 2007 Proc of SPIE IS T Electronic Imaging SPIE vol 6508 pp 650822 Jan 29 2007 8 Introduction to codecs http gizmodo com 5093670 giz explains every video format youneed to know 9 H 264 AVC JM Software http bs hhi de suehring tml download new version of the H 264 AVCreference software http iphome hhi de suehring tml download 10 AVS reference software ftp 159 226 42 57 public avs docs avs software 11 MPEG website http www mpeg org 12 MPEG 1 ISO IEC JTC1 SC29 Coding of moving pictures and associated audio for digital storage media up to about ARTICLE IN PRESS A Puri et al Signal Processing Image Communication 19 2004 793 849 847 1 5 Mbit s ISO IEC 11172 2 International Standard November 1992 13 MPEG 2 ISO IEC JTC1 SC29 WG11 and ITU T ISO IEC 13818 2 Information TechnologyGeneric Coding of Moving Pictures and Associated Audio Information Video ISO IEC and ITUT 1994 14 MPEG 4 ISO IEC JTCI SC29 WG11 ISO IEC 14 496 2000 2 Information on Technology Coding of Audio Visual Objects Part 2 Visual ISO IEC 2000 15 H 264 Standard 2007 pdf http ee uta edu Dip Courses EE5359 H 264 20Standard2007 pdf 17 JVT Draft ITU T recommendation and final draft international standard of joint video specification ITU T rec H 264 ISO IEC 14496 10 AVC March 2003 JVT G050 available on http ip hhi de imagecom G1 assets pdfs JVT G050 pdf 18 R Sch fer et al The emerging H 264 AVC standard EBU Technical Review Jan 2003 19 Rate Control and H 264 link http www pixeltools com rate control paper html 20 UTA digital image processing course website link http wwwee uta edu dip Courses EE5356 ee 5356 htm 21 H 264 14496 10 AVC Reference Software Manual link http iphome hhi de
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