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UT Arlington EE 5359 - Performance analysis of Dirac video, AVS- China video and AAC audio codec

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Performance analysis of Dirac video, AVS-China video and AAC audio codec Under guidance of Dr.K.R.RaoSubmitted By,ASHWINI S URSID # 1000646070Outline• Overview of Dirac video codec• Overview of AVS-china video codec• Overview of AAC audio codec• Performance of Dirac codec• Performance of AVS-China video codec• Performance of AAC audio codec• Conclusion• Future Work• ReferencesOverview of Dirac video codec• Dirac[1] is a hybrid video codec developed by BritishBroadcasting Corporation (BBC). Dirac is a hybrid videocodec because it involves both transform and motioncompensation.• The key feature of Dirac is that it is an open technology,which means that the technology can be used withoutpayment of licensing fees.• Dirac uses modern techniques like, wavelet transformand arithmetic coding for entropy coding. Theapplications of Dirac range from high definitiontelevision (HDTV) to web streaming due to its flexibility.Fig.1 Block Diagram of Dirac Encoder [1]Overview of AVS-China video codec• Audio-video coding standard (AVS) is a working group of audio and video coding standard in China, which was established in 2002. • Based on versatile applications in the area of video, AVS-china is categorized into various profiles[16]. • AVS-china consists of four profiles namely: Jizhun (base) profile, Jiben (basic) profile, Shenzhan (extended) profile and Jiaqiang (enhanced) profile, defined in AVS-video targeting to different applications (Table.2) [16]. • AVS- china has different parts for various categories. AVS Part-2 defines Jizhun profile.• Jizhun profile is preferable for high coding efficiency on video sequences of higher resolutions, at the expense of moderate computational complexity.Table.1 Different Parts of AVS-chinaPartCategory1System2Video3Audio4Conformance test5Reference Software6Digital media rights management7Mobile video8Transmit AVS via IP network9AVS file format10Mobile speech and audio codingTable.2 Application based profiles of AVS [16]ProfilesKey applicationsJizhun profile(base)Television broadcasting, HDTV, etc.Jiben profile(basic)Mobility applications, etc.Shenzhan profile(extended)Video surveillance, etc.Jiaqiang profile(enhanced)Multimedia entertainment, etc.Fig.2 Typical AVS-China video coding Chain SequenceG.O.P.PictureSliceMacro blockBlockFig.3 Block diagram of AVS-china encoder [15]Overview of AAC • AAC [2] consists of three profiles, namely: main profile, low-complexityprofile and scalable sampling rate (SSR) profile.• The key feature of low-complexity profile is, it deletes the prediction tooland reduces the temporal noise shaping tool in complexity.• Supports sample frequencies from 8 kHz to 96 kHz (official MP3: 16 kHz to48 kHz) [4].• Superior performance at bit rates > 64 kbps and at bit rates reaching aslow as 16 kbps.• Improved compression provides higher-quality audio with smaller bitrates.• AAC can accommodate two basic bit stream formats: Audio datainterchange format (ADIF) and Audio data transport stream (ADTS) [10].Fig.5 Block Diagram AAC Encoder [7]Performance analysis of Dirac video codec• QCIF sequence: Akiyo (4:2:0 format)• Total No: of frames : 300 frames.• Frames used: 150 frames.• Width : 176.• Height: 144.• Frame rate: 30fps.Table.3 Performance of Dirac for Akiyo test sequence (150 frames)QFOriginal File Size(KB)Compressed File Size (KB)Compression RatioBit rate(KBps)Y-MSEY-PSNR(dB)Y- SSIM0556926214:15.15113.78727.5700.7991556928199:15.4283.37428.9200.8402556929192:15.6467.41429.8430.8703556931180:16.1251.61331.0030.8964556936155:17.0332.88232.9610.9245556942133:18.2319.06235.3290.9486556951109:110.1710.74637.8180.968755696684:113.066.12840.2570.978855698764:117.253.42142.7900.9869556911847:123.602.27744.5570.99010556918031:135.951.63246.0030.992Lossless556912774:1255.210.000100.0001.000Original SequenceRecon image QF=0Recon image QF=10Recon image lossless mode• CIF sequence: Tempete (4:2:0 format)• Total No: of frames : 260 frames.• Frames used: 90 frames.• Width : 352.• Height: 288.• Frame rate: 30fpsTable.4 Performance of Dirac for Tempete test sequence (90 frames)QFOriginal File Size (KB)Compressed File Size (KB)Compression RatioBit rate(KBps)Y-MSEY-PSNR(dB)Y- SSIM01336567199:122.09398.81122.1230.60011336576176:125.21305.01723.2880.67821336592145:130.39208.27624.9440.766313365117114:138.71136.11826.7920.83441336515885:152.3884.96428.8380.88851336522460:174.4550.61031.0880.92961336533140:1110.1631.53333.1430.95471336550526:1168.3320.15935.0860.96981336579317:1264.2012.02137.3320.980913365118511:1394.736.94539.7140.987101336517768:1591.943.80842.3240.991Lossless1336578662:12621.980.000100.0001.000Recon sequence for QF=10 Recon sequence lossless modeRecon sequence for QF= 0Original sequence• SDTV sequence: Night move (4:2:0 format)• Total No: of frames : 800 frames.• Frames used: 60 frames.• Width : 704.• Height: 576.• Frame rate: 25fpsQFOriginal File Size (KB)Compressed File Size (KB)Compression RatioBit rate(KBps)Y-MSEY-PSNR(dB)Y- SSIM035640192186:179.5981.70329.0080.718135640295121:1122.5963.85030.0790.73543564059360:1246.7336.63232.4920.776735640182520:1760.3124.90034.1690.816103564065725:12738.137.94139.1320.934Lossless35640240072:110002.790.000100.001.000Table.5 Performance of Dirac for Night move test sequence (60 frames)Night move original seq at 30thframeNight move seq at qf =0; 30thframeNight move seq lossless mode; 30thframeQFOriginal File Size (KB)Compressed File Size (KB)Compression RatioBit rate(KBps)081000179453:174.18181000226358:194.03481000633128:1263.62781000227236:1946.42108100087549:13647.39lossless81000444242:118509• HDTV sequence: Harbor sequence (4:2:0 format)• Total No: of frames : 121 frames.• Frames used: 60 frames.• Width : 1280.• Height: 720.• Frame rate: 25fpsTable.6 Performance of Dirac for Harbor test sequence (60 frames)Harbor seq original; 30thframeHarbor seq at qf =0; 30thframeHarbor seq at lossless mode 30thframeQPOriginal file size(KB)Compressed file size(KB)Compression RatioBit rate (KBps)Y- MSEY- PSNR(dB)Y - SSIM6355699619:11.69235.36324.4130.67860556910557:11.91191.95825.2990.70555556912464:12.43111.85827.6440.78850556916348:13.2763.43230.1080.85240556932174:16.5321.11634.8850.9343055696783:113.576.55539.9650.97520556915336:131.251.83445.4980.99110556937615:176.850.60250.3330.9965556948012:198.270.43851.7140.997055699846:1201.470.05660.6290.999Performance analysis of AVS-china video codecQCIF sequence: Akiyo


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UT Arlington EE 5359 - Performance analysis of Dirac video, AVS- China video and AAC audio codec

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