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UT Arlington EE 5359 - H.264 AVC, Dirac and AVS China

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UNIVERSITY OF TEXAS AT ARLINGTON Prof: Dr. K.R. Rao FALL 2010 EE5359 PROJECT REPORTStudy and Performance Comparison of H.264/AVC, Dirac and AVS China Part 7Submitted By: Touseef Khan UTA ID: 1000676051 [email protected] of AcronymsAIF – Adaptive Interpolation Filter AU - Access Unit AVC – Audio Video CodingAVS - Advanced Video Standard AVS-M - Audio Video Standard for mobile BBC - British Broadcasting CorporationCABAC – Context Adaptive Binary Arithmetic CodingCAVLC - Context Adaptive Variable Length Coding CIF - Common Intermediate Format FPS – Frame per secondHD - High Definition ICT - Integer Cosine Transform I-Frame - Intra Frame IEC - International Electrotechnical CommissionIMS IP - Multimedia Subsystem IP – Internet ProtocolISO – International Organization for StandardizationITU-T International Telecommunication UnionJVT - Joint Video TeamKBps – Kilo bytes per secondMB - Macroblocks MBPAFF - Macro Block Pair Adaptive Field FrameMPEG - Moving Picture Experts GroupMSE – Mean Square Error NAL - Network Abstraction Layer PAFF - Picture Adaptive Field FrameP-Frame - Predicted Frame PIT – Pre-scaled Integer Transform PSNR – Peak Signal to Noise ratioQCIF - Quarter Common Intermediate Format QF – Quality FactorQP - Quantization Parameter RTP – Real-time Transport ProtocolSD - Standard Definition SSIM – Structural Similarity Metric TV - TelevisionVCEG - Video Coding Experts GroupVCL – Video Coding LayerVLC Variable Length CodingABSTRACTThis project aims to provide a study and comparison of video codingstandards: H.264/AVC[1], Dirac[24] and AVS China Part 7(AVS ChinaMobile)[13]. Different test video sequences are used to compare thesestandards on quality parameters like SSIM, MSE and PSNR at various bitrates. The complexity, the advantages and disadvantages of the baselineprofile of the above mentioned video coding standards are evaluated.The experimental results are tabulated and plotted and appropriateconclusions are drawn. With so many video coding standards beingintroduced each year, this project is a small step towards gaining basicknowledge and understanding of the above mentioned standards. Aftergaining knowledge of these standards, project or thesis can be done onimplementing software tools or codec’s based on these standards.1. INTRODUCTIONBroadcast television and home entertainment have been revolutionized by the advent of digitalTV and DVD-video. These applications and many more are made possible by the standardizationof video compression technology. Video compression (or video coding) is an essentialtechnology for applications such as digital television, DVD-Video, mobile TV, videoconferencingand internet video streaming. The figure below is an example of home media ecosystem. Figure 1: An example of a home media ecosystem [22]In today’s world we expect a seamless integration of various standards. The history of variousaudio video coding standards as they emerged over the years can be seen in figure 2. 1stGENERATION 2ndGENERATIONFigure 2: History of audio/video coding standards [23]Standardizing video compression makes it possible for products from different manufacturers(e.g. encoders, decoders and storage media) to inter-operate. An encoder converts video into acompressed format and a decoder then converts compressed video back into an uncompressedformat. The process of converting a digital video into a format that takes up less capacity whenit is stored or transmitted is defined by each industry standard for video compression. Thesestandards define the format (syntax) for compressed video bit stream and a method fordecoding this syntax to produce a displayable video sequence. The standard document does notactually specify how to encode (compress) digital video – this is left to the manufacturer of avideo encoder – but in practice the encoder is likely to mirror the steps of the decoding process.Fig 3: Block Diagram of general video coding and decoding process [1]An optional preprocessing step, the sender might choose to preprocess the video using format conversion or enhancement techniques. The encoder encodes the video and represents the video as a bit stream. The decoder decodes the video which gets displayed after an optional post-processing step which might include format conversion, filtering to suppress coding artifacts, error concealment, or video enhancement.2. AVS STANDARDAVS video coding standards[17] are important parts of standardization productions of AVSworking group. AVS-video is the collective name of all parts related to coding of video and itsauxiliary information in the AVS such as video, audio and media copyright management. Thedifferent parts of AVS China are listed in Table 1. [17]Table 1: Different parts of AVS standard [17]Considering the different requirements of various video applications, AVS-video defines differentprofiles, which combine advanced video coding tools with trade-off between coding efficiencyand encoder/decoder implementation complexity as well as functional properties and target tocategory of applications.2.1 Profiles and Levels [13]‘‘Profile’’ is a specified subset of the coding tools. In AVS video, each profile picks up tools fromthe video coding tool pool. So far, there are four profiles -- Jizhun (base ) profile- Jiben (basic) profile- Shenzhan (extended) profile - Jiaqiang (enhanced) profile - defined in AVS-video targeting different applications (Table 2.)Profiles Key ApplicationsJizhun profile Television broadcasting, HDTV etcJiben profile Mobility applications, etc.Shenzhan profile Video surveillance, etc.Jiaqiang profile Multimedia entertainment, etcTable 2: Application-based profiles of AVS [13]2.1.1 AVS- video Jizhun profile (base profile) Jizhun profile is defined as the first profile in the national standard of AVS-Part2, approved asnational standard in 2006, which mainly focuses on digital video applications like commercialbroadcasting and storage media, including high-definition applications. Typically, it is preferablefor high coding efficiency on video sequences of higher resolutions, at the expense of moderatecomputational complexity.2.1.2. AVS-video Jiben profile (basic profile) Jiben profile is defined in AVS-Part7 target mobility video applications featured with


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UT Arlington EE 5359 - H.264 AVC, Dirac and AVS China

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