ISO/IEC 14496-2:2001/Amd 3:2003

INTERNATIONAL ISO/IEC
STANDARD 14496-2
Second edition
2001-12-01
AMENDMENT 3
2003-05-15

Information technology — Coding of
audio-visual objects —
Part 2:
Visual
AMENDMENT 3: New levels and tools for
MPEG-4 visual
Technologies de l'information — Codage des objets audiovisuels —
Partie 2: Codage visuel
AMENDEMENT 3: Nouveaux niveaux et outils pour codage visuel
MPEG-4




Reference number
ISO/IEC 14496-2:2001/Amd.3:2003(E)
©
ISO/IEC 2003

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ISO/IEC 14496-2:2001/Amd.3:2003(E)
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ii © ISO/IEC 2003 – All rights reserved

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ISO/IEC 14496-2:2001/Amd.3:2003(E)
Foreword
ISO (the International Organization for Standardization) and IEC (the International Electrotechnical
Commission) form the specialized system for worldwide standardization. National bodies that are members of
ISO or IEC participate in the development of International Standards through technical committees
established by the respective organization to deal with particular fields of technical activity. ISO and IEC
technical committees collaborate in fields of mutual interest. Other international organizations, governmental
and non-governmental, in liaison with ISO and IEC, also take part in the work. In the field of information
technology, ISO and IEC have established a joint technical committee, ISO/IEC JTC 1.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of the joint technical committee is to prepare International Standards. Draft International
Standards adopted by the joint technical committee are circulated to national bodies for voting. Publication as
an International Standard requires approval by at least 75 % of the national bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this Amendment may be the subject of patent
rights. ISO and IEC shall not be held responsible for identifying any or all such patent rights.
Amendment 3 to International Standard ISO/IEC 14496-2:2001 was prepared by Joint Technical Committee
ISO/IEC JTC 1, Information technology, Subcommittee SC 29, Coding of audio, picture, multimedia and
hypermedia information.
© ISO/IEC 2003 — All rights reserved iii

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ISO/IEC 14496-2:2001/Amd.3:2003(E)
Introduction
With the advent of new multimedia streaming applications, there are requests from industry parties to add new
levels to existing visual profiles in order to establish interoperability points for these applications. Adding alpha
channel support to VTC is also included in this amendment.

iv © ISO/IEC 2003 — All rights reserved

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ISO/IEC 14496-2:2001/Amd.3:2003(E)

Information technology — Coding of audio-visual objects —
Part 2:
Visual
AMENDMENT 3: New levels and tools for MPEG-4 visual
Add the following row to the Table N-1 in Annex N:
1 spatial or
1 x Simple or
temporal
Simple
L0 QCIF 1 Simple 1 446 124 1856 N.A. 10 10 2048 N. A. N. A. 128
enhancement
Scalable
Scalable
layer

and the following text after item 10 (the note for Simple Profile @ Level L0) in the notes of Annex N:
11. For Simple Scalable Profile @ Level L0, the following restrictions apply:
a) Base layer compliant to Simple Profile @ Level L0;
b) The enhancement layer maximum f_code shall be 1;
c) The enhancement layer intra_dc_vlc_threshold shall be 0;
d) For enhancement layer, if AC prediction is used, the following restriction applies: QP value shall not
be changed within a VOP (or within a video packet if video packets are used in a VOP). If AC
prediction is not used, there are no restrictions to changing QP value;
e) Spatial scalability shall be limited to a 1:1 scaling ratio.

Add the following row to the Table AMD2-15:
4x AS or
L3b 352x288 4 Simple 1 1188 396 11880100 65 65 4096 1500 N.A.
AS


Add the following two rows in Table G-1 in AMD2:
Simple Scalable Profile/Level 0 00010000
Advanced Simple Profile/Level 3b 11110111

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ISO/IEC 14496-2:2001/Amd.3:2003(E)
Change the following two rows in Table G-1 in AMD2 from:
Reserved 00001001- 00010000
Reserved 11110110 - 11110111

to
Reserved 00001001- 00001111
Reserved 11110110

Addition of alpha channel to VTC:
In subclause 6.3.8, change
from
Table 6-33: Texture Object Layer Shape type.
texture_object_layer_shape Meaning
00 rectangular
01 binary
10 reserved
11 reserved

to
Table 6-33: Texture Object Layer Shape type.
texture_object_layer_shape Meaning
00 rectangular
01 binary
10 reserved
11 grayscale

In subclause 6.2.8 - Still Texture Object, change
from

 Else if (texture_object_layer_shape == “01”) {

  Horizontal_ref
15 uimsbf
  Marker_bit
1 bslbf
  Vertical_ref
15 uimsbf
  Marker_bit
1 bslbf
  Object_width
15 uimsbf
  Marker_bit
1 bslbf
  Object_height
15 uimsbf
  Marker_bit
1 bslbf
2 © ISO/IEC 2003 – All rights reserved

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ISO/IEC 14496-2:2001/Amd.3:2003(E)
to

 Else if (texture_object_layer_shape == “01” or “11”) {

  horizontal_ref
15 uimsbf
  marker_bit
1 bslbf
  vertical_ref
15 uimsbf
  marker_bit 1 bslbf
  object_width
15 uimsbf
  marker_bit
1 bslbf
  object_height
15 uimsbf
  marker_bit 1 bslbf

from

  else { /* !texture_error_resilience_disable */
  if (texture_object_layer_shape== “01”
   && tiling_disable==“0”) {
   if (texture_tile_type==“boundary tile”)
   shape_object_decoding()
  }
  for (color = “y”, “u”, “v”){
   wavelet_dc_decode()
  }

to

  else { /* !texture_error_resilience_disable */
  if (texture_object_layer_shape!= “00”
   && tiling_disable==“0”) {
   if (texture_tile_type==“boundary tile”)
   shape_object_decoding()
  }

  for (color = “y”, “u”, “v”,”α”){
   wavelet_dc_decode()
  }

from

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ISO/IEC 14496-2:2001/Amd.3:2003(E)
  else if ( quantisation_typ
...