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MPEG-4 Part 17

January 01, 1970

MPEG-4 Part 17, or MPEG-4 Timed Text (MP4TT), or MPEG-4 Streaming text format is the text-based subtitle format for MPEG-4, published as ISO/IEC 14496-17 in 2006.[1] It was developed in response to the need for a generic method for coding of text as one of the multimedia components within audiovisual presentations.[2]

It is also streamable, which was one of the main aspects when creating the format. It is mainly aimed for use in the .mp4 container, but can also be used in the .3gp container as 3GPP Timed Text (TTXT), which is technically almost identical with .mp4 but more used in cell phones. 3GPP Timed Text is exactly the same as MPEG-4 Timed Text when used in the .mp4 container. It can be also used in other file formats based on the ISO base media file format.[3][4][5]

3GPP approved the Timed text format for 3G multimedia services in 3GPP TS 26.245 in 2004.[6][7] MPEG-4 Part 17 (ISO/IEC 14496-17:2006) defined Text Streams that are capable of carrying 3GPP Timed Text.[5] For 3GPP text streams, ISO/IEC 14496-17:2006 defined a generic framing structure suitable for transport of 3GPP text streams across a variety of networks (RTP and MPEG transport stream and MPEG program stream). The framing structure for text streams consists of so-called Timed Text Units (TTU).[1]

Supporting implementations edit

QuickTime Pro and MP4Box can create or produce these subtitle streams out of various subtitle input formats. MP4Box uses the FourCC tx3g for MPEG-4 Timed Text because of its inherently higher compatibility. MPEG-4 Timed Text is heavily based on XML semantics.

On October 7, 2005, VideoLAN added decoding support for MPEG-4 Timed Text subtitles in VLC.[8]

On October 30, 2005, Gabest added decoding support for MPEG-4 Timed Text subtitles in MPC.[9]

See also edit

References edit

  1. ^ a b ISO (2006). "ISO/IEC 14496-17:2006 - Information technology -- Coding of audio-visual objects -- Part 17: Streaming text format". ISO. Retrieved 2009-10-19.
  2. ^ ISO/IEC JTC 1/SC 29/WG 11 (July 2005), (PDF), archived from the original (PDF) on 2014-05-12, retrieved 2009-10-19{{citation}}: CS1 maint: numeric names: authors list (link)
  3. ^ MP4REG. . Archived from the original on 2009-12-08. Retrieved 2009-10-19.{{cite web}}: CS1 maint: numeric names: authors list (link)
  4. ^ MP4REG. . Archived from the original on 2004-08-28. Retrieved 2009-10-19.{{cite web}}: CS1 maint: numeric names: authors list (link)
  5. ^ a b Jan van der Meer (July 2005). "White Paper on Streaming Text – MPEG-4 part 17, ISO/IEC JTC1/SC29/WG11N7515". ISO. Retrieved 2009-10-19.
  6. ^ 3GPP. "3GPP TS 26.245 - Transparent end-to-end Packet switched Streaming Service (PSS); Timed text format". Retrieved 2009-10-19.{{cite web}}: CS1 maint: numeric names: authors list (link)
  7. ^ 3GPP (2004-06-18), 3GPP TS 26.245 V6.0.0 (2004-06) - Transparent end-to-end Packet switched Streaming Service (PSS); Timed text format (Release 6) (ZIP, DOC), retrieved 2009-10-19{{citation}}: CS1 maint: numeric names: authors list (link)
  8. ^ . forum.videolan.org. Archived from the original on 2007-03-13.
  9. ^ "Media Player Classic supports Matroska v2, *.mp4, *.mov, and MPEG-4 Timed Text - Doom9's Forum".

External links edit

  • GPAC MP4Box explanation of 3GPP Timed Text
  • Official MPEG web site
  • ISO/IEC 14496-17:2006 - Coding of audio-visual objects -- Part 17: Streaming text format


 

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January 01, 1970
mpeg, part, mpeg, timed, text, mp4tt, mpeg, streaming, text, format, text, based, subtitle, format, mpeg, published, 14496, 2006, developed, response, need, generic, method, coding, text, multimedia, components, within, audiovisual, presentations, also, stream. MPEG 4 Part 17 or MPEG 4 Timed Text MP4TT or MPEG 4 Streaming text format is the text based subtitle format for MPEG 4 published as ISO IEC 14496 17 in 2006 1 It was developed in response to the need for a generic method for coding of text as one of the multimedia components within audiovisual presentations 2 It is also streamable which was one of the main aspects when creating the format It is mainly aimed for use in the mp4 container but can also be used in the 3gp container as 3GPP Timed Text TTXT which is technically almost identical with mp4 but more used in cell phones 3GPP Timed Text is exactly the same as MPEG 4 Timed Text when used in the mp4 container It can be also used in other file formats based on the ISO base media file format 3 4 5 3GPP approved the Timed text format for 3G multimedia services in 3GPP TS 26 245 in 2004 6 7 MPEG 4 Part 17 ISO IEC 14496 17 2006 defined Text Streams that are capable of carrying 3GPP Timed Text 5 For 3GPP text streams ISO IEC 14496 17 2006 defined a generic framing structure suitable for transport of 3GPP text streams across a variety of networks RTP and MPEG transport stream and MPEG program stream The framing structure for text streams consists of so called Timed Text Units TTU 1 Contents 1 Supporting implementations 2 See also 3 References 4 External linksSupporting implementations editQuickTime Pro and MP4Box can create or produce these subtitle streams out of various subtitle input formats MP4Box uses the FourCC tx3g for MPEG 4 Timed Text because of its inherently higher compatibility MPEG 4 Timed Text is heavily based on XML semantics On October 7 2005 VideoLAN added decoding support for MPEG 4 Timed Text subtitles in VLC 8 On October 30 2005 Gabest added decoding support for MPEG 4 Timed Text subtitles in MPC 9 See also editOgg Writ SubRip WebVTTReferences edit a b ISO 2006 ISO IEC 14496 17 2006 Information technology Coding of audio visual objects Part 17 Streaming text format ISO Retrieved 2009 10 19 ISO IEC JTC 1 SC 29 WG 11 July 2005 MPEG standardizes streaming of text N7269 PDF archived from the original PDF on 2014 05 12 retrieved 2009 10 19 a href Template Citation html title Template Citation citation a CS1 maint numeric names authors list link MP4REG The MP4 Registration Authority Registered Types Brands Archived from the original on 2009 12 08 Retrieved 2009 10 19 a href Template Cite web html title Template Cite web cite web a CS1 maint numeric names authors list link MP4REG The MP4 Registration Authority Registered Types Codecs Archived from the original on 2004 08 28 Retrieved 2009 10 19 a href Template Cite web html title Template Cite web cite web a CS1 maint numeric names authors list link a b Jan van der Meer July 2005 White Paper on Streaming Text MPEG 4 part 17 ISO IEC JTC1 SC29 WG11N7515 ISO Retrieved 2009 10 19 3GPP 3GPP TS 26 245 Transparent end to end Packet switched Streaming Service PSS Timed text format Retrieved 2009 10 19 a href Template Cite web html title Template Cite web cite web a CS1 maint numeric names authors list link 3GPP 2004 06 18 3GPP TS 26 245 V6 0 0 2004 06 Transparent end to end Packet switched Streaming Service PSS Timed text format Release 6 ZIP DOC retrieved 2009 10 19 a href Template Citation html title Template Citation citation a CS1 maint numeric names authors list link The VideoLAN Forums View topic MPEG 4 3GPP Timed Text Subtitles forum videolan org Archived from the original on 2007 03 13 Media Player Classic supports Matroska v2 mp4 mov and MPEG 4 Timed Text Doom9 s Forum External links editGPAC MP4Box explanation of 3GPP Timed Text Official MPEG web site ISO IEC 14496 17 2006 Coding of audio visual objects Part 17 Streaming text format nbsp This standards or measurement related article is a stub You can help Wikipedia by expanding it vte Retrieved from https en wikipedia org w index php title MPEG 4 Part 17 amp oldid 1210689922, wikipedia, wiki, book, books, library,

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