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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/