ISO/IEC 14496-4:2000

INTERNATIONAL ISO/IEC
STAN DA RD 14496-4
First edition
2000-12-15
Information technology — Coding of audio-
visual objects —
Conformance testing
Technologies de l'information — Codage des objets audiovisuels —
Partie 4: Essai de conformité
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/IECISO 00(E)14496-4:20
©ISO/IEC 2000
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Contentse
1 General . 1
1.1 Scope. 1
1.2 Normative references. 1
2 Technical elements . 3
2.1 Definitions. 3
2.2 Abbreviations and symbols. 3
3 Systems. 3
3.1 Conformance Points . 3
3.1.1 FlexMux Conformance Point. 4
3.1.2 Sync Layer Conformance Point . 4
3.1.3 OD Conformance Point. 5
3.1.4 BIFS Conformance Point . 5
3.1.5 OCI Conformance Point. 5
3.1.6 IPMP Conformance Point . 5
3.1.7 Scene Graph Conformance Point . 5
3.2 Bitstream Conformance. 5
3.2.1 FlexMux Conformance. 5
3.2.2 Synchronization Layer Conformance. 6
3.2.3 OD Conformance. 6
3.2.4 BIFS Conformance . 6
3.2.5 OCI Conformance. 6
3.2.6 IPMP Conformance. 7
3.2.7 Miscellaneous Conformance. 7
3.3 Terminal Conformance . 7
3.3.1 FlexMux conformance . 8
3.3.2 Synchronization Layer Conformance. 8
3.3.3 OD Conformance. 13
3.3.4 BIFS Conformance . 16
3.3.5 OCI Conformance. 16
3.3.6 IPMP Conformance. 17
3.3.7 Scene Graph Conformance . 17
3.3.8 Miscellaneous Conformance. 18
3.4 Test material and test suites . 18
3.4.1 Parsing Hint File Format. 19
3.4.2 Scene Dump File Format . 21
3.4.3 Test Suites . 24
4 Visual . 29
4.1 Introduction. 29
4.2 Definition of visual bitstream compliance . 30
4.2.1 Requirements and restrictions related to profile-and-level . 30
4.2.2 Additional restrictions on bitstream applied by the encoder . 31
4.2.3 Encoder requirements and recommendations. 31
4.3 Procedure for testing bitstream compliance . 31
4.4 Definition of visual decoder compliance . 32
4.4.1 Requirement on arithmetic accuracy in video objects (without IDCT) . 33
4.4.2 Requirement on arithmetic accuracy in video objects (with IDCT). 34
4.4.3 Requirement on arithmetic accuracy in scalable still texture object (without IDWT) . 34
4.4.4 Requirement on arithmetic accuracy in scalable still texture (with IDWT). 34
4.4.5 Requirement on output of the decoding process and timing. 34
4.4.6 Recommendations . 35
4.5 Procedure to test decoder compliance . 35
4.5.1 Static tests . 35
4.5.2 Dynamic tests . 35
4.5.3 Specification of the test bitstreams. 36
4.5.4 Implementation of the static test . 50
4.5.5 Implementation of the dynamic test . 51
4.5.6 Decoder conformance. 51
4.5.7 Normative Test Suites for Simple, Simple Scalable, Core, Main and N-Bit profile. 51
4.5.8 Bitstream Donated by MPEG-4 Platform Verification Bitstream Development Project. 54
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5 Audio . 64
5.1 Introduction . 64
5.2 Audio Conformance Points . 64
5.3 Audio Profiles . 65
5.4 Audio Interchange formats (Informative part). 66
5.4.1 Parsing an Audio_Data_Interchange_Format (ADIF) header. 66
5.4.2 Parsing Audio_Data_Transport_Stream (ADTS) header . 66
5.5 Audio Object Types. 66
5.5.1 General Object Type Descriptions. 67
5.5.2 Null. 73
5.5.3 Common Characteristics of the AAC-derived object types . 73
5.5.4 Common characteristics of the AAC objects supporting ISO/IEC 13818-7 profiles (AAC LC, AAC
Main, AAC SSR and AAC LTP ) . 77
5.5.5 AAC LC . 79
5.5.6 AAC Main. 86
5.5.7 AAC SSR. 88
5.5.8 AAC LTP . 91
5.5.9 AAC scalable. 92
5.5.10 AAC-based Scalable Configurations. 93
5.5.11 TwinVQ. 95
5.5.12 CELP. 99
5.5.13 HVXC. 103
5.5.14 TTSI. 113
5.5.15 General MIDI . 116
5.5.16 Wavetable Synthesis. 117
5.5.17 Algorithmic Synthesis and AudioFX . 118
5.5.18 Main Synthetic . 124
5.6 Audio Composition . 125
5.6.1 Introduction . 125
5.6.2 Common Audio Composition Characteristic. 128
5.6.3 AudioSource and Sound2D. 129
5.6.4 AudioSource and Sound. 131
5.6.5 AudioSwitch. 132
5.6.6 AudioMix and Sampling Rate Conversion. 132
5.6.7 AudioFX. 133
6 DMIF. 134
6.1 Introduction . 134
6.2 The PICS. 134
6.2.1 Global statement of conformance . 135
6.2.2 DMIF Signalling . 135
6.2.3 Q.2931 Extensions for DMIF. 141
6.3 The Conformance ATS. 142
6.3.1 General . 142
6.3.2 ATS for DS. 143
7 SNHC . 171
7.1 Introduction . 171
7.1.1 Purpose & Scope. 171
7.1.2 Intended Use of Decoders. 172
7.1.3 What Is To Be Tested. 172
7.2 Conformance Points . 172
7.2.1 Covered Functionality. 172
7.2.2 Description/References on Conformance Definitions. 173
7.3 Testing Conditions. 176
7.3.1 Description of Test Data. 176
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Annex AimaSample Bank Format (SASBF) compliance testing and materials. 186
A.1 Introduction. 186
A.2 Organization. 186
A.3 Test Sequence Structure . 188
A.4 Abbreviations. 188
A.5 Measurement and Analysis . 189
A.5.1 General . 189
A.5.2 Decay/Release Segment . 189
A.5.3 Filter. 189
A.6 Test Banks . 190
A.6.1 LimitsLFO.dls. 190
A.6.2 LimitsVolEG.dls. 190
A.6.3 Shut Down Time Test. 190
A.6.4 LimitsModEG.dls . 191
A.6.5 PitchEG.dls . 191
A.6.6 PitchModLFO.dls. 192
A.6.7 PitchVibLFO.dls. 193
A.6.8 PitchGen.dls. 193
A.6.9 GainModLFO.dls. 195
A.6.10 GainEG.dls . 196
A.6.11 GainGen.dls . 196
A.6.12 FilterGen.dls. 198
A.6.13 FilterModLFO.dls. 203
A.6.14 FilterEG.dls . 205
A.7 Mod EG Delay to Fc Test . 206
A.8 Mod EG Hold to Fc Test. 206
A.9 Mod EG Sustain to Fc Test. 206
A.10 Discrepancies . 209
A.11 Outstanding Issues . 210
A.12 References . 210
Annex Bim a Complexity measurement criteria and tool for level definitions of algorithmic
synthesis and AudioFX Object Type . 211
B.1 Introduction. 211
B.2 Parameters for complexity analyses . 211
B.3 The complexity vector. 214
B.4 The profiling tool for Structured Audio. 227
Annex C (informa) Test bitstreams for the CELP object type . 231
Annex DimaPatent statements. 235
Bibliography. 237
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Introduction
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INTERNATIONAL STANDARD ISO/IEC 14496-4:2000(E)
Information technology  Coding of audio-visual objects 
Part 4: Conformance testing
1 General
1.1 Scope
Th ISO/IEC 14496 s how tesst can be designed to verfiy w bitss and decs m
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1.2 Normative references
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2 Technical elements
2.1 Definitions
fro  ISO/EC 14496 can be found in ISO/IEC 14496-1, ISO/IEC 14496-2, ISO
.sestsro,
2.2 Abbreviations and symbols
Relevant abbr and smy fro this part of ISO/EC 14496 can be found in ISO/IEC 14496-
.sestsro,
3 Systems
3.1 Conformance Points
Fitra a- 4m per the s of the Systs Dec Model as
ied in ISO/IEC 14496-1. With rferee to this mifocm
MPEG-4 Terminal
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/IECISO 1, bols eviations
14496-3 and ISO/IEC 14496- Syual, Audio and DMIF def Vis 6 f emtivelyinitionspec r
/IEC of part this initionsdef Relevant
eneva, 1990. it/ 64 at p ual audio fo ode H.261 Re CCI H.261 Re
ber 6, 1990.1990, Dec
an ne entation ple ation Spe Standa IEEE

On Figure 3-1, DB are Decoding Buffres, CB are Comition Buffres. Audio c
fresceeccsesA
m
• Flex
• a
• OD
• BIFS
• OC
• IPMP
• stsme
mrtos
Tremm
• Flex
• a
• OfDre
• fre
• OfCre
• IPMP
• ScGr
• stsme
3.1.1 FlexMux Conformance Point
cm a cme point we Flex srts as defined in se 11.2 of
/IEC 14496-1 can be aced or insreted. Accroding to a scene deliver,y there may be seal Flex
cm . h cm crorsepond to one Flex channel allocated under DMIF
. A Flr cseme point c an be envis aged accroing to d  crod
to a Treminal point of view. Flex bits cme points ara sy
srts can be aced, while Flex Treminal cme points are mroe dedicated to the
smes ce of the Flex-ed srts, whh can be aced or insreted, with their asscoi
jbcetcrs.-4isi
3.1.2 Sync Layer Conformance Point
A Syation Lay (S cme point has to be ced fr si
the SL Treminal point of view. SL bits cme points are dedicated to the
asst ofy the SL bitss whh c an be aced or insreted, assmuing that the SL c h
SL srt is kn upon acition of the Ojbcet Descr. SL mcm mro ea
smes c SL bitss with the asscoiated signalling aced fr the Ojbcet
crswith the infromation found in the related SLConfcr, and with the infromation found in the
ks.secoi
4©E/CIISO–Allsirser
erved ght 2000
ated SL_PDU pact headeras
iptorigDes , iptordes
om quir eamtr the of ohere enc the and antic the to
dedicted e ar points e anc oronf inal ter iptor quis now eam
eac iguration ofonf quir ic eamtr pec ntactic
ancoronf eamtr and view of point eambitstr
SL the view: of points ble pos two om iderons ancoronf L) er onishrnc
gnalling. The MPEGgnalling c s iptoround in the Oan be f des
ated quir ic eam Mux oherenc the and antic
ancoronf Mux quir that eam FlexMux
the of t pecas ntactic the to dedicted e ancoronf eamtr Mux
ing ac and view of point eambitstr a anc orponsibilityonf Muxex
Mux pointse ancoronf FlexMux Eac pointse ancoronf
Mux ver quir ISO
lausubc eam Mux her ancoronf is point e ancoronf FlexMux A
anc oderSyor Dec Model conf em
aphene
I Decoding Buf
BIFS Decoding Buf
oding Buf Dec
Sy onishrtion Laync er
Mux
e pointsance: ar or inal conf
w e point, bitse in tesill be acanc us ing.quired feamtr or onf c At a bitseamtr
anc oderSyor Dec Model conf em
I Decoding
odingDec
odingDec
Sy onishrtion Laync er
Mux
e pointsance: ar or onf c eamBitstr
AU. of Units pieces or (U) ontain pixted Acontain ructrons c l data. Decoding buf
CB Video data. PCM ontain CB pos

3.1.3 OD Conformance Point
Th a point situated between the DMIF interfe and the OD parsre/. Accses Units fr OD Elemy
ms
3.1.4 BIFS Conformance Point
Th is a point situated between the DMIF interfe and the BIFS sre/cses fr
ys point in the terminal. BIFS Elemy Strs c BIFS Comm
.
3.1.5 OCI Conformance Point
fsCre/cses fTrih OCy
ms
3.1.6 IPMP Conformance Point
IPMP infromation shall be ced in an MPEG-4 bits using the IPMP frk cr
s 8.6. Th incl the IPMP Elemy srt (I and the IPMP
sc r) .(I rmosbe ced using IPI Data se as sied in ISO
se 8.6.8. IPMP bits cme points are dedicated to sy cme. IPMP
memamm
3.1.7 Scene Graph Conformance Point
Th sieen the Scene Graph Management and the Com. The data prent at this point
r the crurent state of the Scene Graph, i.e. the integration over time of all m
mcat fe wrs. rcee
It is the last point in the BIFS infromation fl we cme can be sied. The fromat of the
imdependent. Howe, there shall be a way to ext this im
romation and prent it fro cme testing in the Scene Dump fromat sied in the Tse t
.s
3.2 Bitstream Conformance
h smthe sy and sme rem sied in ISO/IEC 14496-1. Th se
cr a set of tesst to be perfromed on bitss. In the description of the tesst it is assmued that the test
c no errros due to trmsision or other c. For each test the condition or c
thc imesuaft
ation of these tesst res parsing of the bits to the srpe
ODs is also red. In smoe csase of IPMP-rpoted data, de-scrbling may be red befst cna
fromr.e
3.2.1 FlexMux Conformance
3.2.1.1 Conformance Requirements
1-ismop
3.2.1.2 Measurement procedure
me
3.2.1.3 Tolerance
Trokisya
5©E/CIISO–Allsirser
erved ght 2000
il. f orhe diagnos pas s isng. Tis eam bitshectr no tolerhere isntax c e fanc
lause 11.2 ofubc/IEC 14496- ISO s ents of1. eet the rSy equirhall m s the bitseamtrntax of
ly hall c s w ationsed bitslause 11.2 ofubc in siceam/IEC 14496- ISOtrFlexMuxth the sifpec
ed on non IPMP-eaturlated fes be per
tes the e or equir am tec equir
of intertation and ing Par levels. appropriate eamtr equir applic
ied are given, as be stis w thethat ll asNote the pronditionsequisapplied. er c ortesbe in w an h the tesic
that onditions esaus ans ontains eambitstr
ed eamtr ibesdes
lausubc is ifpec entsequir antic ntactic eet hall eambitstr Eac
lause belowubc
Material ifpec ancoronf es inf
entation-dependentplem actr ver entation-plem is point
this at data ifpec ancoronf her ow
the viewived by omerinal as all interAnimll asions the ter
BIFS and andsCom BIFS entsepres
es itorpos betwtuated point a is is
ance pointsance. inal c are dedicoronfanticorted to sonfter c
ancoronf ntactic ancoronf tream ubclaus 14496-1,
/IEC pecif ts onvey hall ation infIdentifation icIP PMP-Ds iptorDes
PMP-ES) eam entar ude
...