Delivery of Timeline for External Data in MPEG-2 Transport Stream

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Contribution presented during the 104th MPEG meeting and related to the delivery of timeline for external data in MPEG-2 Transport Stream.

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Delivery of Timeline for External Data in MPEG-2 Transport Stream

  1. 1. Telecom ParisTechTimeline Deliveryfor MPEG-2 TSenhancementsm29227lefeuvre@telecom-paristech.fr
  2. 2. Telecom ParisTechH2B2VS Project H2B2VS focuses on the distribution of TV programs andservices over heterogeneous networks:• Broadcast network (terrestrial, satellite, cable) and• Broadband network (ADSL, fibre, mobile, …), by making use of a new compression technology: HEVC
  3. 3. Telecom ParisTechGoals Enhance existing broadcast• Media replacements, scalable enhancements Without impacting existing broadcast infrastructure• StatMux or other equipments Rationale• Scarcity of Spectrum resources prevents Broadcastnetwork operators to propose new services• Difficulties for broadband networks to address specificgroups of people or some small geographical areas(towns, districts, …)4/26/20133
  4. 4. Telecom ParisTechTS Service with perceptual Sync Audio switch from/to enhanced audio• user watches TV and switch from stereo to 5.1• Possibility to move from a language to another one─ Dubbing track in native language to/from track in originallanguage─ National language to/from regional languages, … Visual Data• Subtitles, text annotations• Picture-In-Picture─ Sign language video─ Video overlay26/04/20134
  5. 5. Telecom ParisTechTS Service with frame-accurate Sync 3D distribution• The broadcast carries the 2D “legacy” program, 3Dversion is delivered over broadband• Needs frame-accurate presentation UltraHD TV distribution• The Broadcast carries the AVC HD program, UltraHDversion can be delivered broadband with SHVCenhancement• Needs frame-accurate decoding26/04/20135
  6. 6. Telecom ParisTechTechnical Goals Indicate location of the enhancement• URL pointing to external resource• Optionally, indicate MIME type Provide stable timeline for TS• Not impacted by PCR discontinuity• Not impacted by muxers• Map PES timestamps to a media timeline Dynamic enhancements• Send prefetching information• Send reload/change of enhancements Tools, not services• How media is acquired is out of scope (buffering, …)• How media is consumed is out of scope (decoding, …)• No restrictions on enhancement media type26/04/20136
  7. 7. Telecom ParisTechProposal Description Single PES stream• Avoids PMT update when enhancement changes• Less impact on existing muxers• Not touching media PES streams Signaling• Mime types and service URL• Media timeline• Reload marker• Service announcement for prefetch26/04/20137
  8. 8. Telecom ParisTechProposal26/04/20138MediaTimelineTime_PES_Payload {has_mimehas_locationforce_location_reloadis announcementreserved=0if (has_mime) {mime_lengthfor (i=0;i<mime_length;i++) {mime_type}}if (has_location) {url_lengthfor (i=0;i< url_length;i++) {addon_url}}timescaleif (is_announcement) {time_before_activation} else {media_time_anchor}} Payload syntax + New PES StreamType
  9. 9. Telecom ParisTechM29227Questions ?lefeuvre@telecom-paristech.fr

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