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

1. Telecom ParisTech
Timeline Delivery
for MPEG-2 TS
enhancements
m29227
lefeuvre@telecom-paristech.fr

2. Telecom ParisTech
H2B2VS Project
 H2B2VS focuses on the distribution of TV programs and
services over heterogeneous networks:
• Broadcast network (terrestrial, satellite, cable) and
• Broadband network (ADSL, fibre, mobile, …),
 by making use of a new compression technology: HEVC

3. Telecom ParisTech
Goals
 Enhance existing broadcast
• Media replacements, scalable enhancements
 Without impacting existing broadcast infrastructure
• StatMux or other equipments
 Rationale
• Scarcity of Spectrum resources prevents Broadcast
network operators to propose new services
• Difficulties for broadband networks to address specific
groups of people or some small geographical areas
(towns, districts, …)
4/26/20133

4. Telecom ParisTech
TS 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 original
language
─ National language to/from regional languages, …
 Visual Data
• Subtitles, text annotations
• Picture-In-Picture
─ Sign language video
─ Video overlay
26/04/20134

5. Telecom ParisTech
TS Service with frame-accurate Sync
 3D distribution
• The broadcast carries the 2D “legacy” program, 3D
version is delivered over broadband
• Needs frame-accurate presentation
 UltraHD TV distribution
• The Broadcast carries the AVC HD program, UltraHD
version can be delivered broadband with SHVC
enhancement
• Needs frame-accurate decoding
26/04/20135

6. Telecom ParisTech
Technical 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 type
26/04/20136

7. Telecom ParisTech
Proposal 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 prefetch
26/04/20137

8. Telecom ParisTech
Proposal
26/04/20138
MediaTimelineTime_PES_Payload {
has_mime
has_location
force_location_reload
is announcement
reserved=0
if (has_mime) {
mime_length
for (i=0;i<mime_length;i++) {
mime_type
}
}
if (has_location) {
url_length
for (i=0;i< url_length;i++) {
addon_url
}
}
timescale
if (is_announcement) {
time_before_activation
} else {
media_time_anchor
}
}
 Payload syntax
 + New PES StreamType

9. Telecom ParisTech
M29227
Questions ?
lefeuvre@telecom-paristech.fr