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きゅうたおうじ
4 years ago
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1 (5) - (2) SMIL katto@waseda.jp

3 8 khz , 44.1, 48 khz 16

4 kbit/s G.711 (PCM) G.726 (ADPCM) GSM (CELP) 8 ( ) VSELP PCM CD/DAT MPEG1 PSI-CELP G.728 (CELP) ( ) MPEG4 G (CELP) G.729 (CELP) AMR (CELP) CELP ( )

5 (1) ( ) ( ) LPC ( ) ( ) G ( ) LPC L.Rabiner et al: Fundamentals of Speech Recognition

6 (2) CELP CELP: Code Excitation Linear Prediction LPC + LPC

7 (3) LPC ( ) LPC: Linear Prediction Coding s( n) p = a k = 1 k s( n k) + G u( n) s(n): a k : LPC p: LPC k G: ( ) u(n): e( n) = 0 a k p k = 1 r ( i k) aˆ n k = r n ( i) r(k): a^ k : LPC (Durbin )

8 (4) d: d = x gac min x: ( ) A: LPC g: c: ( )... ( )

9 (5) (1) K- ( Lloyd ) ( ) c 1, c2, K, cm (M: ) r k 1, 2, k = ( K, L) (L: ) (NN) c i r k 2 min ( ) = c i r k C i r k

10 (6) (2) LBG ( ) c c + n n = = c c n n (1 + ε) (1 ε) (NN) k-

11 (1) FFT (QMF) MDCT

12 (2) ( )

13 (3) MP3 (MPEG-1 Layer III) QMF MDCT FFT cf. Layer I, II QMF FFT

14 (4) MPEG-2 AAC MDCT (for transient signals) MDCT (LPC) ( ) (for stationary signals) MDCT 2 MDCT

15 (5) Twin VQ MDCT LPC LPC MDCT

16 PCM ( ) PCM (+ ) ( ) ( )

17 SMIL

18 ( ) 3D AV CG CG ( )

19 SMIL * XML... HTML SMIL Synchronized Multimedia Integration Language <smil> <head> <layout> </layout> </head> <body> <par> </par> </body> </smil>

20 SMIL root a b <root-layout width= 500 height= 400 /> <region id= a top= 50 left= 50 width= 100 height= 80 /> <region id= b top= 200 left= 50 width= 400 height= 200 />

21 SMIL <par> <video region= b src= rtsp:// /> <seq> <img region= a src= dur= 10s /> <img region= a src= dur= 10s /> <img region= a src= dur= 10s /> </seq> </par> <par> 1, 2, </par> <seq> 1, 2, </seq> <video>, <audio>, <img>,...

VRML VRML Virtual Reality Modeling Language CG VRML Hello Transform { Transform { translation 15

23 VRML VRML Virtual Reality Modeling Language CG VRML Hello Transform { Transform { translation Shape { geometry Box } } Transform { translation Shape { geometry Cylinder } } }...

24 VRML VRML 2.0 VRML 2.0 : Anchor Collision CylinderSensor PlaneSensor ProximitySensor SphereSensor TimeSensor TouchSensor VisibilitySensor : Coordinate Color Normal TextureCoordinate : Billboard Group Inline LOD Switch Transform AudioClip Background Fog FontStyle NavigationInfo Script Sound WorldInfo : Appearance Material ImageTexture PixelTexture MovieTexture TextureTransform : Shape Box Cone Cylinder ElevationGrid Extrusion IndexedFaceSet IndexedLineSet PointSet Sphere Text : ColorInterpolator CoordinateInterpolator NormalInterpolator OrientationInterpolator PositionInterpolator ScalarInterpolator : DirectionalLight PointLight SpotLight Viewpoint

25 MPEG4/SNHC MPEG-4 4 Systems/SNHC AV CG

26 (1) (MPEG4 BIFS) MPEG4/SNHC Binary Format for Scene VRML (VRML) CG Hello AV

27 MPEG4/SNHC (2) FAP (Facial Animation Parameter) FAP ( ) FAP FDP (Facial Definition Parameter) FAP ( )

28 MPEG4/SNHC (3) BAP (Body Animation Parameter) BAP ( ) BAP BDP (Body Definition Parameter) BAP ( )

29 MPEG4/SNHC (4) + + G.Taubin: Geometric Compression Through Topological Surgery, ACM Trans on Graphics.

30 MPEG4/SNHC (connectivity) 2. (geometry) 3. (property)

31 MPEG4/SNHC [1] 2 (A) (C) A C E (E) ( ) ( ) (F) B D F ( ) ( ) G.Taubin: Geometric Compression Through Topological Surgery, ACM Trans on Graphics.

32 MPEG4/SNHC [2] ( ) (1) (3) (2) G.Taubin: Geometric Compression Through Topological Surgery, ACM Trans on Graphics.

33 MPEG4/SNHC (1) (2)

34 MPEG4/SNHC (5) SAOL (Structured Audio Orchestra Language):... SASL (Structured Audio Score Language):... MIDI SABSF (SA Bank Sample Format):... PCM

36 SMIL SMIL SMIL ( ) GRiNS Editor for SMIL (Oratrix: trial) SMIL Composer (Sausage Software: free) Fluituion (Confluent Technologies: trial) SMIL Editor (NTT DoCoMo : trial)

37 MPEG-4/VRML: Broadcast Studio (MPEG-4 BIFS) : Metastream ( + CG ) XVL ( ) SpaceStream (VRML + AV/CG )

ｽﾗｲﾄﾞﾀｲﾄﾙなし

ｽﾗｲﾄﾞﾀｲﾄﾙなし (5) - (5) 2002.05.21 E-Mail: katto@katto.comm.waseda.ac.jp 8 khz 8 22.5, 44.1, 48 khz 16 512 256 128 64 32 16 kbit/s G.711 (PCM) G.726 (ADPCM) GSM (CELP) 8 ( ) VSELP 4 2 40 PCM CD/DAT MPEG1 PSI-CELP G.728

ｽﾗｲﾄﾞ ﾀｲﾄﾙなし

ｽﾗｲﾄﾞﾀｲﾄﾙなし