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Tien TRAN-THUONG

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Title: Tien TRAN-THUONG


1
An Abstract Animation Model for Integrating SMIL
Basic Animations With Multimedia Document
Tien TRAN-THUONG Cécile ROISIN
OPERA Research Project
INRIA Rhône-Alpes
Zirst - 655 avenue de l'Europe - Montbonnot -
38334 Saint Ismier Cedex - France e-mail
tien.tran_thuong_at_inrialpes.fr cecile.roisin_at_inria
lpes.fr
2
Multimedia document modeling
Declarative approach for specifying multimedia
document
Multimedia document model Content, Temporal,
Spatial, Link, Animation
Medias / Multimedia database
Multimedia document specification
Multimedia document
3
Animation modeling
  • An animation model is defined by (f, v, a, o, t)
  • animator function (f), values (v), target
    attribute (a)
  • target object (o)
  • timing (t).
  • Two approaches for creating animations
  • Programming ? high expressive power but
    difficult,
  • Declarative ? lower expressive power but easier
    for the author
  • Modeling for declarative animation definition

4
  • Objectives of the animation model
  • Specifying animations,
  • Reutilization of animation,
  • Simplifying maintenance of multimedia documents.
  • Our approach
  • Abstract animation definition,
  • Independence between media target (o) and
    animation definition,
  • Independence with rendition context (t)

5
Ex. 1 transitions between images
O1
O2
O3
O4
O5
O6
time
t1
t2
t3
t8
t9
t10
t11
t4
t5
t6
t7
t12
Playing sequentially a list of images with
transition animations between two consecutive
images
  • Animation modeling (f, v, a, o, t) two animation
    types for the modification of the alpha color
    attribute
  • v V1 (0, 1) from transparent to visible, V2
    (1, 0) from visible to transparent
  • flinear aalpha oO1..O6 tt1..t12.

6
Specification with HyTime, MHEG and SMIL
Up 1
Up 2
Up 3
Up 4
Up 5
Up 6
Down 1
Down 2
Down 3
Down 4
Down 5
Down 6
  • The animation specification can be specified
    thought the models
  • HyTime a modifier (v, f, a, o) is projected on a
    time t
  • Upi((0,1, f, a, Oi), ti) Downi((1,0, f, a,
    Oi), ti1) , where i1..6
  • MHEG an action (v, f, a, t) is referenced to an
    object o
  • Upi((0,1, f, a, ti), Oi) Downi((1,0, f, a,
    ti1), Oi)
  • SMIL a basic_animation (v, f, a, t) is included
    into or referenced to an object o
  • Upi((0,1, f, a, ti), Oi) Downi((1,0, f, a,
    ti1), Oi)

7
Ex. 2 MADEUS characters motion
Spline path
Moving a sequence of characters on a same path
  • Animation modeling (f, v, a, o, t) where
  • v 45,350158,260383,440608,260832,440945,350
  • fspline aposition oM,A,D,E,U,S
    tt1..t6
  • In MHEG, HyTime and SMIL, the author has to
    specify 6 animations for each character object
    (v, f, a, Oi, ti), where i1..6.

8
Why actual models provide no abstract
specification ?
  • HyTime a modifier (v, f, a) referring to one
    object o is projected on a concrete time t.
  • MHEG an action (v, f, a, t) defined directly on
    a concrete time refers to an object o.

Object
Object
Ref.
Ref.
Action class
Object modification


modifier
modifier
action
action
time
Projectors
  • for only one object and
  • in a concrete time

time
  • for only one object
  • SMIL a basic_animation (v, f, a, t) included
    into or referred to an object o has the same
    problems as the action of MHEG.

Object

time
animateMotion
animate
9
  • No abstraction animation specification implies
  • Redundancy,
  • No reutilization,
  • Tedious and hard editing work.

10
Animation Definition
  • Abstract extension of SMIL animation model

Our abstract model
SMIL model
((f, v, a, t), o) ? A (f, v, a, ï)
  • same SMIL semantic function animations
    fdiscrete, linear, paced, spline and basic
    animations set set, animate, animateColor,
    animateMotion,
  • abstraction A(f, v, a, ï) where ï is an
    abstract interval 0,1,
  • several objects can refer to the same animation
    (o1, t1), (o2, t2) refers to A.
  • time projection when the abstract animation (f,
    v, a, ï) is referred by the object (o, t) the
    abstract interval ï is projected on the concrete
    time t.

11
Abstract Animation Reutilization
  • Example the uses of the abstract animation A(f,
    v, a, ï) by two object contexts (O1, t1), (O2,
    t2)
  • (O1, t1, A)
  • (O2, t2, A)

12
Mapping the abstract time (ï) into several
concrete times (ti)
  • The abstract time ï0,0.2,0.8,1 is mapped on
    two real times t1begin5, dur8 and
    t2begin15, dur10

13
Ex. 1 transitions between images
  • Define just two abstract animations
  • UpAlpha (linear, 0,1, alpha, 0,1)
    DownAlpha (linear, 1,0, alpha, 0,1)
  • Syntax

ltanimate idUpAlpha calcModelinear
values0,1 attributealpha keytime0,1/gt
ltanimate idDownAlpha calcModelinear
values1,0 attributealpha keytime0,1/gt
  • Referencing

O1
O2
O3
O4
O5
O6
time
14
Ex. 2 MADEUS characters motion
  • Define just one abstract animation
  • MadeusPath (spline, 45,350158,260 ,
    position, 00.20.40.60.81)
  • Syntax
  • ltanimateMotion idMadeusPath calcModespline
    values45,350158,260 keyTime00.20.40.6
    0.81/gt
  • Animation referencing

M
A
D
E


time
15
  • Example 1
  • the author has to defined two abstract
    animations
  • UpAlpha (linear, 0,1, alpha, 0,1)
  • DownAlpha (linear, 1,0, alpha, 0,1)
  • Syntax
  • ltanimate idUpAlpha calcModelinear
    values0,1 attributealpha keytime0,1/gt
  • ltanimate idDownAlpha calcModelinear
    values1,0 attributealpha keytime0,1/gt
  • ltimg idO_1 gt
  • ltanchor begin0s dur3s animateRefUpAlpha/
    gt
  • ltanchor begin10s dur1s animateRefDownAlph
    a/gt
  • lt/imggt
  • ltimg idO_2 gt
  • ltanchor begin0s dur3s animateRefUpAlpha/
    gt
  • ltanchor begin15s dur1s animateRefDownAlph
    a/gt
  • lt/imggt

16
  • Example 2
  • the author has to defined just one abstract
    animation
  • MadeusPath (spline, 45,350158,260 ,
    position, 00.20.40.60.81)
  • Syntax
  • ltanimateMotion idMadeusPath calcModespline
    values45,350158,260 keyTime00.20.40.6
    0.81/gt
  • lttext idM_text gt ltanchor begin2s
    dur10s animateRefMadeusPath/gtMlt/textgt
  • lttext idA_text gt ltanchor begin3s
    dur10s animateRefMadeusPath/gtAlt/textgt
  • lttext idD_text gt ltanchor begin4s
    dur10s animateRefMadeusPath/gtDlt/textgt

17
See also http//opera.inrialpes.fr/people/Tien.T
ran-Thuong/Welcome.html
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