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Slide 1: M P E G- 4 Te c h n o l o g y S t r a t e g y An a l y s is So n j a K n g a s , Mih a i Bu r l a c u a T -1 0 9 .5 5 1 R es ea r ch S em in a r on T elecom m un ica tion s B us in es s I I T elecom m un ica tion s S oftwa r e a n d M ultim edia L a bor a tor y H els in k i Un iver s ity of T ech n ology
Slide 2: Or g a n is a t io n s B e h in d M P E G 4 M P E G (M v in g Pic tu re Exp e rts Gro u p ) o 3G P P (Th e 3 rd Ge n e ra tio n Pa rtn e rs h ip Pro je c t) I te rn e t Stre a m in g M d ia Allia n c e (IS M A ) n e M 4IF ´s (M PEG-4 I d u s try Fo ru m ) n Wire le s s M ltim e d ia Fo ru m 's (W M F ) u + o th e rs
Slide 3: • Ba c k w a r d s c o m p a t ib l e w it h o l d e r MPEG1 a n d MPEG2 • Ob j e c t Or ie n t e d Lo g ic s u p p o r t • De a l s w it h " m e d ia o b j e c t s " - > g e n e r a l iz a t io n f o r t h e v is u a l a n d a u d io c o n t e n t t o h a n d l e b o t h n a t u r a l a n d s y n t h e t ic obj ects • Co d in g / d e c o d in g o f t h e m e d ia c o n t e n t m u s t n o t b e r e l a t e d t o a n y t r a n s m is s io n m e d iu m MPEG1 • r e l e a s e d in 1 9 9 2 . s t a n d a r d f o r s t o r a b l e m u l t im e d ia , m f o r CD- ROM s y s t e m s . MPEG- 1 d e s ig n e d f o r c o m p r e s s in g b u t s o u n d c o m p r e s s in g f o r m a t (MP3 ) f o r m a t b e c a m e p o p u l a r . Th e t y p ic a l t r a n s f e r s p e e d o f MPEG- 1 is VHS q v id e o (1 ,5 Mb / s ). ostl y v id e o , m ore u a l it y MPEG2 • r e l e a s e d in 1 9 9 4 . Me a n t f o r Dig it a l TV. U e d t o DVD a n d s s a t e l it e d ig it a l b r o a d c a s t . • Ty p ic a l r a t e s r a n g e f r o m 1 .5 Mb / s u p t o 2 4 Mb / s MPEG4
Slide 5: Tr a n s m is s io n / S t o r a g e M e d iu m • Tr a n s m is s io n / St o r a g e Me d iu m in d e p e n d e n t o f MPEG- 4 s pec. • I s p e c if ie s t h e p h y s ic a l l a y e r , d ig it a l s t o r a g e t r e q u ir e m e n t s a .s o .("r a w d a t a " • U p e r n e t w o r k l a y e r (l ik e U p DP/ I ATM, MPEG2 Tr a n s p o r t P, St r e a m ) t o h a n d l e t h e a c t u a l p h y s ic a l n e t w o r k p r o p e r t ie s De l iv e r y L a y e r • Me d ia o b j e c t c o n v e y e d b y m u l t ip l e e l e m e n t a r y s t r e a m s . • Co n t e n t o f t h e s t r e a m s : a u d io - v is u a l o b j e c t d a t a , s c e n e d e s c r ip t io n in f o r m a t io n , c o n t r o l in f o r m a t io n in t h e f o r m o f o b j e c t d e s c r ip t o r s • Th e s y n c l a y e r p a s s e s t h e e l e m e n t a r y s t r e a m s t o d e l iv e r y l a y e r t h r o u g h t h e DMI a p p l ic a t io n in t e r f a c e F(DAI ); • De f in e d a s in g l e , u n if o r m in t e r f a c e t o a c c e s s m u l t im e d ia f r o m a m u l t it u d e o f d e l iv e r y t e c h n o l o g ie s ((DAI u s e d f o r ) b r in g in g b r o a d c a s t m a t e r ia l a n d l o c a l f il e s ) • Th e DAI d e f in e s p r o c e d u r e s f o r in it ia l iz in g a n MPEG- 4
Slide 6: S y nc La y er • Sy n c h La y e r h a n d l e s t h e s y n c h r o n iz a t io n o f e l e m e n t a r y s t r e a m s a n d a l s o p r o v id e s t h e b u f f e r in g . I is a c h ie v e d t t h r o u g h t im e s t a m p in g w it h in e l e m e n t a r y s t r e a m s . • Sy n c h r o n iz a t io n La y e r d o e s n o t c o n t a in in f o r m a t io n f o r f r a m e d e m a r c a t io n M u l t im e d ia L a y e r • Co n v e r t s t h e m u l t im e d ia e l e m e n t s in t o e l e m e n t a r y stream s. • Dif f e r e n c e b e t w e e n s y n t h e t ic o b j e c t s a n d n a t u r a l o b j e c t s v is ib l e a t t h is s t a g e • Ob j e c t d e s c r ip t o r s : id e n t if y in f o r m a t io n t y p e f r o m e l e m s t r e a m s a n d id e n t if y t h e g r o u p o f s t r e a m s r e l a t e d t o a m e d ia o b j e c t • Me d ia o b j e c t c a r r ie d in o w n e l e m e n t a r y s t r e a m s . • Th e s c e n e d e s c r ip t io n in f o r m a t io n d e f in e s t h e s p a t ia l a n d t e m p o r a l p o s it io n o f t h e m e d ia o b j e c t s , t h e ir b e h a v io r o v e r t im e
Slide 7: Dyna m ic Im a g e C oding
Slide 8: • St a t ic Te x t u r e Co d in g - d o n e w it h Dis c r e t e W a v e l e t Tr a n s f o r m • Uage s o f r e v e r s ib l e v a r ia b l e l e n g t h c o d e s . AU O DI • "Ge n e r a l Au d io (GA)" c o d e r s . I p u t s ig n a l is n d e c o m p o s e d in t o a t im e / f r e q u e n c y (t / f ) s r e p r e s e n t a t io n b y m e a n s o f a n a n a l y s is f w h ic h is t h e n s u b s e q u e n t l y q u a n t iz e d a n d • Bit r a t e s c a l a b il it y im p o r t a n t f e a t u r e f ir s t pectr al il t e r b a n k , coded. • Sy n t h e t ic s o u n d s u p p o r t + o l d t r a d it io n a l s o u n d c o m p r e s s io n s t o o l a v a il a b l e
Slide 9: Business strategies: MPEG-4 next big thing? Expectations (industry viewpoint): • Video to be MPEG-4’s main application area • Industry people both servers and consumers of MPEG-4 • MPEG-4 deployment started in 2002 • Eencoder/server/player solution seems to be good idea • Software encoders vs. hardware encoders • Priority: performance, availability and price • Wireless video does not lead the growth of MPEG-4 Expectations (consumers): • What MPEG-4?
Slide 10: Video on mobile devices 1. The growth of data bandwidth in mobile networks 2. Improved video compression technologies 3. Improved camera and display technologies Video applications in wireless devices - video conference/telephony, MMS, video messanging, video streaming (advertisement, entertainment, education, communication...) + Media integration (multiple media): Interactive eLearning, interactive advertising, network games, media-on demand, MP3, HDTV, digital cable TV, personal video recording (PVR) etc.
Slide 11: An example: The mobile entertainment value web (possibilities for MPEG-4)
Slide 12: Areas of application Wide: digital television, multimedia, video, audio, wireless... Key issues - new ways of using and accessing media - streaming and downloading video - interoperability - secure communication and pay-per-view - "mixing the best of Shockwave, Flash, VRML, and digital video into a single file format, server and player"
Slide 13: New business opportunities - business opportunities for established market players and newcomers to digital video and multimedia - MPEG-4 devices for home entertainment systems (set-top-boxes, DVD players, handheld devices...), wireless, other - Rich (multi)media across broadcast, broadband, wireless and wired networks - New ways of experiencing media! (compare to the content industry trends) - Different categories of excellence (web): hw/sw, real time/non-real time -read by the same decoders
Slide 14: Problems in the paradise... + Apple: Internet Streaming Media Alliance and other consortiums for and against + MPEG-4 is very extensive standard -- much more than Real and Microsoft - The static nature of the standard is its weakness - Future development of MPEG-4 or another standard? - Competing video codecs: QuickTime, Real, Windows Media - IPR issues - patents and discoveries behing MPEG-4 (problems?)
Slide 15: Thank you!