ISO/IEC 13818-1:2015/FDAmd 7

FINAL
ISO/IEC
AMENDMENT
DRAFT
13818-1:2015
FDAM 7
ISO/IEC JTC 1/SC 29
Information technology — Generic
Secretariat: JISC
coding of moving pictures and
Voting begins on:
2016-12-19 associated audio information —
Voting terminates on:
Part 1:
2017-02-13
Systems
AMENDMENT 7: Virtual segmentation
Technologies de l’information — Codage générique des images
animées et du son associé —
Partie 1: Systèmes
AMENDEMENT 7: Segmentation virtuelle
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DOCUMENTATION.
IN ADDITION TO THEIR EVALUATION AS
Reference number
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO-
ISO/IEC 13818-1:2015/FDAM 7:2016(E)
LOGICAL, COMMERCIAL AND USER PURPOSES,
DRAFT INTERNATIONAL STANDARDS MAY ON
OCCASION HAVE TO BE CONSIDERED IN THE
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DARDS TO WHICH REFERENCE MAY BE MADE IN
©
NATIONAL REGULATIONS. ISO/IEC 2016

ISO/IEC 13818-1:2015/FDAM 7:2016(E)

© ISO/IEC 2016, Published in Switzerland
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ii © ISO/IEC 2016 – All rights reserved

ISO/IEC 13818-1:2015/FDAM 7:2016(E)
Foreword
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Amendment 7 to ISO/IEC 13818-1:2015 was prepared by Joint Technical Committee ISO/IEC JTC 1,
Information technology, Subcommittee SC 29, Coding of audio, picture, multimedia and hypermedia
information, in collaboration with ITU-T. The identical text is published as ITU-T H.222 (10/2016).
© ISO/IEC 2016– All rights reserved iii

ISO/IEC 13818-1:2015/FDAM 7:2016(E)
Text of ISO/IEC 13818-1:2015/FDAM7
INTERNATIONAL STANDARD
RECOMMENDATION ITU-T
Information technology – Generic coding of moving pictures and
associated audio information: Systems
Amendment 7
Carriage of MPEG-H 3D audio over MPEG-2 Systems
In clause 2.6.90, replace Table 2-107 with:
Table 2-107 – Extension descriptor
Syntax No. of bits Mnemonic
Extension_descriptor () {
descriptor_tag 8 uimsbf
descriptor_length 8 uimsbf
extension_descriptor_tag 8 uimsbf
if ( extension_descriptor_tag == 0x02) {
ObjectDescriptorUpdate()
}
else if ( extension_descriptor_tag == 0x03) {
HEVC_timing_and_HRD_descriptor()
}
else if ( extension_descriptor_tag == 0x04) {
af_extension_descriptor()
}
else if ( extension_descriptor_tag == 0x05) {
HEVC_operation_point_descriptor()
}
else if ( extension_descriptor_tag == 0x06) {
HEVC_hierachy_extension_descriptor()
}
else if ( extension_descriptor_tag == 0x07) {
Green_extension_descriptor ()
}
else if ( extension_descriptor_tag == 0x08) {
MPEG-H_3dAudio_descriptor()
}
else if ( extension_descriptor_tag == 0x09) {
MPEG-H_3dAudio_config_descriptor()
}
else if ( extension_descriptor_tag == 0x0A) {
MPEG-H_3dAudio_scene_descriptor()
}
else if ( extension_descriptor_tag == 0x0B) {
MPEG-H_3dAudio_text_label_descriptor()
}
else if ( extension_descriptor_tag == 0x0C) {
MPEG-H_3dAudio_multi-stream_descriptor()
}
ITU-T Rec. H.222.0 (2015)/ FDAM 7 1
© ISO/IEC 2016 – All rights reserved

ISO/IEC 13818-1:2015/FDAM 7:2016(E)
Text of ISO/IEC 13818-1:2015/FDAM7
Syntax No. of bits Mnemonic
else if ( extension_descriptor_tag == 0x0D) {
MPEG-H_3dAudio_drc_loudness_descriptor()
}
else if ( extension_descriptor_tag == 0x0E) {
MPEG-H_3dAudio_command_descriptor()
}
else if ( extension_descriptor_tag == 0x0F) {
Quality_extension_descriptor ()
}
else if ( extension_descriptor_tag == 0x10) {
Virtual_segmentation_descriptor ()
}
else {
for ( i=0; i reserved 8 bslbf
}
}
}
Replace Table 2-108 with:
Table 2-108: Extension descriptor Tag values
Extension_descriptor_tag TS PS Identification
0 n/a n/a Reserved
1 n/a X Forbidden
2 X X ODUpdate_descriptor
3 X n/a HEVC_timing_and_HRD_descriptor()
4 X n/a af_extensions_descriptor()
5 X n/a HEVC_operation_point_descriptor()
6 X n/a HEVC_hierarchy_extension_descriptor()
7 X n/a Green_extension_descriptor()
8 X n/a MPEG-H_3dAudio_descriptor()
9 X n/a MPEG-H_3dAudio_config_descriptor()
0x0A X n/a MPEG-H_3dAudio_scene_descriptor()
0x0B X n/a MPEG-H_3dAudio_text_label_descriptor()
0x0C X n/a MPEG-H_3dAudio_multi-stream_descriptor()
0x0D X n/a MPEG-H_3dAudio_drc_loudness_descriptor()
0x0E X n/a MPEG-H_3dAudio_command_descriptor()
0x0F X n/a Quality_extension_descriptor()
0x10 X n/a Virtual_segmentation_descriptor()
0x11-0xFF n/a n/a Rec. ITU-T H.222.0 | ISO/IEC 13818-1 Reserved
ITU-T Rec. H.222.0 (2015)/ FDAM 7 2
© ISO/IEC 2016 – All rights reserved

ISO/IEC 13818-1:2015/FDAM 7:2016(E)
Text of ISO/IEC 13818-1:2015/FDAM7
Add the following clauses after 2.6.119
2.6.120 Virtual segmentation descriptor
The virtual segmentation descriptor appears in the elementary stream descriptor loop in the PMT and is used to
indicate that the current elementary stream is virtually segmented using boundary descriptors (see Annex U sec. 3.9).
This segmentation may come in a set of partitions – e.g., one partition demarcates the stream into 10-sec virtual
segments, while another creates 2-sec virtual segments. If the boundary descriptor carried in transport stream
packets appears in the elemental stream, it is an explicit indication of segment boundary point, otherwise a reference
PID shall be defined in the virtual segmentation descriptor which indicates segment boundary point is decided by
referring another elemental stream, in which the boundary descriptor shall be explicitly carried.
Table 2-111quindecies - Virtual segmentation descriptor
Syntax No. bits Mnemonic
Virtual_segmentation_descriptor(){
if (descriptor_length > 1) {
num_partitions 3 uimsbf
timescale_flag 1 bslbf
reserved 4 bslbf
if ( timescale_flag == 1 ) {
ticks_per_second 21 uismbf
maximum_duration_length_minus_1 (MDL) 2 uismbf
reserved 1 bslbf
}
for ( i = 0; i < num_partitions; i++ ) {
explicit_boundary_flag 1 bslbf
partition_id 3 uimsbf
reserved 4 bslbf
SAP_type_max 3 uismbf
if (explicit_boundary_flag == 0 ) {
reserved 5 bslbf
boundary_PID 13 uimsbf
reserved 3 bslbf
}
else {
maximum_duration MDL*8 + 5 uimsbf
}
}
}
}
Semantics
timescale_flag: If set to 1, timescale information is present. If set to 0, ticks_per_second is inferred to be 1, and
MDL is inferred to be 0 (i.e., maximum_duration_length_minus_1=-1). The value of 0 allows maximum segment
duration of up to 31 seconds, expressed in integer seconds.
ticks_per_second: Precision, in ticks per second, of the maximum_duration field, e.g., 0.1 second precision is 10
ticks/sec, 0.01 second precision with 100 ticks/sec, etc.
maximum_duration_length_minus_1: length, in bytes (minus one), of the maximum_duration field variable byte
length. This provides additional bytes in addition to the 5 bits pre-allocated to the maximum_duration field
num_partitions: Number of partitions described in the virtual segmentation descriptor.
ITU-T Rec. H.222.0 (2015)/ FDAM 7
© ISO/IEC 2016 – All rights reserved

ISO/IEC 13818-1:2015/FDAM 7:2016(E)
Text of ISO/IEC 13818-1:2015/FDAM7
explicit_boundary_flag: If set to 0, this elementary stream is a dependent stream, and boundary data for it is
provided on a reference partition on a different PID, specified by boundary_PID; otherwise, the current PID carries
boundary descriptors.
partition_id: ID of the partition described in the boundary descriptor.
boundary_PID: PID carrying boundary_descriptor() that is used by this partition of this elementary stream.
SAP_type_max: Maximum possible value of SAP in this partition. If SAP_type_max value is 0, any SAP value
may appear in the stream.
maximum_duration: Maximum virtual segment duration for a segment on partition partition_id, expressed in uni
...