Committed to connecting the world

  •  
wtisd

ITU-T Recommendations

Search by number:
Others:
Skip Navigation Links
Content search
Advanced search
Provisional name
Equivalent number
Formal description
Study Groups tree viewExpand Study Groups tree view

ITU-T H.222.0 (2000) Amd. 5 (01/2005)

عربي | 中文 | English | Español | Français | Русский
New audio profile and level signalling and change to audio_type table entry
The major element in this amendment is the signalling of bandwidth extension data to MPEG-AAC audio ("AAC-plus"), which was implemented as follows:1) A new descriptor called "MPEG-2_AAC_audio_descriptor" has been added to signal AAC specific audio parameters in the PMT including the use of bandwidth extension data to MPEG-2 AAC.2) The MPEG-4_audio_profile_and_level table has been replaced by a newer table to include the bandwidth extension data to MPEG-4 audio.3) In the ISO_639_language_descriptor, the values for audio_type 0x04-0x7F have been changed from 'reserved' to 'user_private'. This change was done at the request of broadcasters to enable signalling ancillary audio as this could not be done earlier because all the values of audio_type (0x04-0xFF) were reserved.
Citation: https://handle.itu.int/11.1002/1000/7437
Series title: H series: Audiovisual and multimedia systems
  H.200-H.499: Infrastructure of audiovisual services
  H.220-H.229: Transmission multiplexing and synchronization
Approval date: 2005-01-08
Identical standard:ISO/IEC 13818-1:2000/Amd5:2005 (Common)
Approval process:AAP
Status: Superseded
Maintenance responsibility: ITU-T Study Group 16
Further details: Patent statement(s)
Development history
[2 related work items in progress]