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Mpeg Family 簡介

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Mpeg Family 簡介. 第六組 B88901124 呂孟庭 B88901078 廖彥鈞. What is Mpeg?. MPEG( Moving Picture Experts Group ) ISO 底下的工作群 1988 年成立 負責為數位音訊和視訊訂立標準. 100 倍. Mpeg 發展歷史. - PowerPoint PPT Presentation

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  • Mpeg Family B88901124 B88901078

  • What is Mpeg?MPEG( Moving Picture Experts Group )ISO1988100

  • Mpeg Mpeg-1( 199211 ) Mpeg-2( 199411 ) Mpeg-3( ??????????? ) Mpeg-4 Ver1 ( 199810 ) Mpeg-4 Ver2 ( 199912 )

  • Mpeg-1

    ()352X240(NTSC)CBR( Constant Bit Rate )1.5Mbps30 FrameYUV

  • MPEG-1 YUV

    RGB FormatYUV Format Y U(Cr) V(Cb)

  • Mpeg-1 Block Based Motion Compensation ( ) I(Intra) FrameDCTSize P(Predictive) Frame B(Bidirectional) Frame I B B P DCT Based Compression

  • Mpeg-1 Motion Compensation12Frame I Frame0.4Sec IBBPBBPBBPBBIBBPBBP IBBPBBPBBP

  • Mpeg-1 DCTDiscrete Cosine TransformSource Encoding( ) ( 20Hz~20KHz )

  • Mpeg-1 DCT(II)

  • Mpeg-1 DCT(III)

  • Mpeg-1Audio

  • Mpeg-2(I)

    720X480( Mpeg-1 2 )60Frame/s( Mpeg-1 2 )YUVHDTV( High Definition Television )EDTV( Extended Definition Television)

  • Mpeg-2(II) AudioAAC( Advanced Audio Coding ) 5.1( 5+ )

  • Mpeg-1 VS. Mpeg-23Mbps80Mbps5~10Mbps0.88Mbps6.5Mbps1.38Mbps720X5761920X1152352X288720X576720X576352X288

  • Mpeg-1 VS. Mpeg-2

  • Mpeg-31920X1440HDTVEDTVMpeg-2

  • Mpeg-1 vs. Mpeg-2

  • MPEG4Whats different between MPEG4 and other MPEGs?Why do we need MPEG4?

  • MPEG4~ ex:Wireless Multimedia Application ex: Video-on-Demand ex:

  • MPEG4 FeatureAVOAVO(Audio Visual Object)content-based coding Natural Audio Object Natural Video Object SNHC (Synthetic- Natural Hybrid Coding) Other (Text,Still Image)

  • Audio Object

  • Audio Coding Based on MPEG-2 AACCompatible to MPEG-2 AAC

  • Video Object

  • Video Object CodingVLBV (Very low bit-rate Video) CodingGeneric MPEG4 Coding

  • SNHC (Synthetic- Natural Hybrid Coding)/

  • Now we have BIFS

  • Binary Format for Scene: BIFS (:)

  • Logical structure of a scene

  • MPEG-4 object-based architecture

  • ResourceMPEG Home Page http://mpeg.telecomitalialab.com/MPEG-4 Industry Forum http://www.m4if.org/ISMA http://www.isma.tv/