ISO/IEC 14496-3:2009/Amd 6:2017

INTERNATIONAL ISO/IEC
STANDARD 14496-3
Fourth edition
2009-09-01
AMENDMENT 6
2017-03
Information technology — Coding of
audio-visual objects —
Part 3:
Audio
AMENDMENT 6: Profiles, levels and
downmixing method for 22.2 channel
programs
Technologies de l’information — Codage des objets audiovisuels —
Partie 3: Codage audio
AMENDEMENT 6: .
Reference number
ISO/IEC 14496-3:2009/Amd.6:2017(E)
©
 ISO/IEC 2017

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ISO/IEC 14496-3:2009/Amd.6:2017(E)

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©  ISO/IEC 2017, Published in Switzerland
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form
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ISO/IEC 14496-3:2009/Amd.6:2017(E)

Foreword
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Commission) form the specialized system for worldwide standardization. National bodies that are
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organizations, governmental and non-governmental, in liaison with ISO and IEC, also take part in the
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ISO/IEC JTC 1.
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URL: www .iso .org/ iso/ foreword .html.
Amendment 6 to ISO/IEC 14496-3:2009 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 2017 – All rights reserved  iii

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ISO/IEC 14496-3:2009/Amd.6:2017(E)

iv © ISO/IEC 2017 – All rights reserved

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ISO/IEC 14496-3:2009/Amd.6:2017(E)
Information technology — Coding of audio-visual
objects —
Part 3:
Audio
AMENDMENT 6: Profiles, levels and downmixing method for
22.2 channel programs
Page 31, 1.5.2.3
Replace:
Table 1.10 — Levels for the AAC Profile
Level Max. Max. Max. PCU Max.
channels/ sampling RCU
object rate [kHz]
1 2 24 3 5
2 2 48 6 5
3 NA NA NA NA
4 5 48 19 15
5 5 96 38 15
6 7 48 25 19
7 7 96 50 19
with:
Table 1.10 — Levels for the AAC Profile
Level Max. Max. Max. PCU Max.
channels/ sampling RCU
object rate [kHz]
1 2 24 3 5
2 2 48 6 5
3 NA NA NA NA
4 5 48 19 15
5 5 96 38 15
6 7 48 25 19
7 7 96 50 19
8 22 48 73 56
9 22 96 146 56
© ISO 2017 – All rights reserved  1

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ISO/IEC 14496-3:2009/Amd.6:2017(E)

Page 36, 1.5.2.4
Insert the following new entries into Table 1.14 “audioProfileLevelIndication values” and adapt the
“reserved for ISO use” range accordingly:
0x5D AAC Profile L8
0x5E AAC Profile L9
0x5F - 0x7F reserved for ISO use -
Page 13, 4.4.2.1
Replace:
Table AMD4.3 — Syntax of MPEG4_ancillary_data
Syntax No. of Bits Mnemonic
MPEG4_ancillary_data() {
   ancillary_data_sync; 8 bslbf
   mpeg_audio_type 2 bslbf
   dolby_surround_mode 2 bslbf
   drc_presentation_mode 2 bslbf
   stereo_downmix_mode; 1 bslbf
   bs_info_reserved, set to “0”  1 bslbf
   anc_data_status_reserved, set to “000”  3 bslbf
   downmixing_levels_MPEG4_status 1 bslbf
   ancillary_data_extension_status; 1 bslbf
   audio_coding_and_compression_status 1 bslbf
   coarse_grain_timecode_status 1 bslbf
     fine_grain_timecode_status 1 bslbf
   if (downmixing_levels_MPEG4_status == 1) {
     center_mix_level_on 1 bslbf
     center_mix_level_value 3 bslbf
     surround_mix_level_on 1 bslbf
     surround_mix_level_value 3 bslbf
   }
   If (audio_coding_mode_and_compression_status == 1) {
audio_coding_mode_reserved 7 bslbf
compression_on 1 bslbf
compression_value 8 bslbf
   }
      if(coarse_grain_timecode_status == 1)
     coarse_grain_timecode 16 bslbf
     if(fine_grain_timecode_status == 1)
         fine_grain_timecode 16 bslbf
      if (ancillary_data_extension_status == 1){
     reserved, set to “0”  1 bslbf
     ext_downmixing_levels_status; 1 bslbf
     ext_downmixing_global_gains_status; 1 bslbf
     ext_downmixing_lfe_level_status; 1 bslbf
     reserved, set to “0000” 4 bslbf
         if (ext_downmixing_levels_status == 1){
          dmix_a_idx; 3 bslbf
          dmix_b_idx; 3 bslbf
          reserved, set to “00”  2 bslbf
     }
2 © ISO 2017 – All rights reserved

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ISO/IEC 14496-3:2009/Amd.6:2017(E)

Table (continued)
Syntax No. of Bits Mnemonic
         if (ext_downmixing_global_gains_status == 1) {
          dmx_gain_5_sign; 1 bslbf
          dmx_gain_5_idx; 6 bslbf
          reserved, set to “0”  1 bslbf
          dmx_gain_2_sign; 1 bslbf
          dmx_gain_2_idx; 6 bslbf
          reserved, set to “0”  1 bslbf
     }
         if (ext_downmixing_lfe_level_status == 1) {
          dmix_lfe_idx; 4 bslbf
          reserved, set to “0000”  4 bslbf
     }
   }
}
with:
Table AMD4.3 — Syntax of MPEG4_ancillary_data
Syntax No. of Bits Mnemonic
MPEG4_ancillary_data() {
   ancillary_data_sync; 8 bslbf
   mpeg_audio_type 2 bslbf
   dolby_surround_mode 2 bslbf
   drc_presentation_mode 2 bslbf
   stereo_downmix_mode; 1 bslbf
   bs_info_reserved, set to “0”  1 bslbf
   anc_data_status_reserved, set to “000”  3 bslbf
   downmixing_levels_MPEG4_status 1 bslbf
   ancillary_data_extension_status; 1 bslbf
   audio_coding_and_compression_status 1 bslbf
   coarse_grain_timecode_status 1 bslbf
     fine_grain_timecode_status 1 bslbf
   }
     if (downmixing_levels_MPEG4_status == 1) {
     center_mix_level_on 1 bslbf
     center_mix_level_value 3 bslbf
     surround_mix_level_on 1 bslbf
     surround_mix_level_value 3 bslbf
   }
     If (audio_coding_mode_and_compression_status == 1) {
     audio_coding_mode_reserved 7 bslbf
     compression_on 1 bslbf
     compression_value 8 bslbf
   }
     if(coarse_grain_timecode_status == 1)
     coarse_grain_timecode 16 bslbf
     if(fine_grain_timecode_status == 1)
          fine_grain_timecode 16 bslbf
     if (ancillary_data_extension_status == 1){
© ISO 2017 – All rights reserved  3

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ISO/IEC 14496-3:2009/Amd.6:2017(E)

Table (continued)
Syntax No. of Bits Mnemonic
     reserved, set to “0”  1 bslbf
     ext_downmixing_levels_status; 1 bslbf
     ext_downmixing_global_gains_status; 1 bslbf
     ext_downmixing_lfe_level_status; 1 bslbf
     reserved, set to “0000” 4 bslbf
          if (ext_downmixing_levels_status == 1){
          dmix_a_idx; 3 bslbf
          dmix_b_idx; 3 bslbf
          reserved, set to “00”  2 bslbf
     }
          if (ext_downmixing_global_gains_status == 1) {
          dmx_gain_5_sign; 1 bslbf
          dmx_gain_5_idx; 6 bslbf
          reserved, set to “0”  1 bslbf
          dmx_gain_2_sign; 1 bslbf
          dmx_gain_2_idx; 6 bslbf
          reserved, set to “0”  1 bslbf
     }
          if (ext_downmixing_lfe_level_status == 1) {
          dmix_lfe_idx; 4 bslbf
          reserved, set to “0000”  4 bslbf
     }
   }
   ancillary_data_sync2; 8 bslbf
   ext_downmixing_level_status2; 1 bslbf
     if (ext_downmixing_levels_status2 == 1) {
          dmix_c_idx; 3 bslbf
          dmix_d_idx; 3 bslbf
          dmix_e_idx; 3 bslbf
          dmix_f_idx; 3 bslbf
          dmix_g_idx; 3 bslbf
          dmix_l_idx; 4 bslbf
          reserved, set to “0000” 4 bslbf
     } else {
          reserved, set to “0000000”  7 bslbf
   }
     byte_alignment();
}
4 © ISO 2017 – All rights reserved

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ISO/IEC 14496-3:2009/Amd.6:2017(E)

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