TV-Anytime An adaptation to DVB Transport Streams and Implementation in European Projects

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TV-AnytimeAn adaptation toDVB Transport
Streamsand Implementation inEuropean Projects

• David White, NDS
• Ronald Tol, Philips

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TV-Anytime functionality, e.g.

• Watch what you want, when you want
• Simpler ways for the consumer to acquire TV
  content onlocal storage
• click on EPG, trailer, website
• Programme groups gt programmes gt programme
  segments
• Example of groups series, related programmes
• Example of programmes an episode, a drama
• Example of segments news items, chapter
• Personalisation and automatic recording

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Overview of a TVA System
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Content Referencing

• The CRID (Content Reference Identifier) allows
  for location independent referencing of content
• It is assigned by an authority which also has the
  ability to resolve the CRID to a location
• A CRID points to a single piece of content or a
  series of other CRIDs

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The CRID in a nutshell

• CRID is a Uniform Resource Identifier (URI)
• CRID//ltauthoritygt/ltdatagt
• ltauthoritygt is a registered internet domain name
• ltDNS namegt
• ltdatagt part is allocated by the authority.
• Example CRID//sky.comfilms/CastAway

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Why do we need Content Referencing?

• The same metadata can be used for content
  regardless of where and when it is broadcast
• To reference groups of programmes such as an
  entire series
• References can be given before time channel has
  been decided
• References work even if there is a change to the
  scheduled transmission time

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CRID Resolution
CRIDTOP
CRIDs resolve to lists (of CRIDs or locators)
A CRID can resolve to other CRIDs
CRIDA
CRIDB
CRIDC
CRIDB1
CRIDB2
locator
locator
locator
locator
locator
At some point, CRIDs must resolve to locations
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CRID Hierarchy Example
Star Trek
Original Series 1966-1969
Voyager 1995-present
Deep Space Nine 1993-1999
The Next Generation 1987-1994



Season 1 1966-1967
Season 2 1967-1968
Season 3 1968-1969




Episode 1 The Man Trap
Episode 29 Operation Annihilate!
Location 1
Location 2
Location
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The CRI Authority

• All CRIDs are published by an authority
• Metadata is often accessed by CRID therefore by
  authority
• Authority is not tied to a particular Network,
  Bouquet, Transport stream or Service
• Authority is a new entity in a DVB network

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RNT Structure
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Authority RNT usage
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CRI structure
Range
Prepend
Unique
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Metadata
ltBroadcastEvent serviceIDRef "hbc100022311"gt ltP
rogram crid"crid//hbc.com/foxes/episode1"/gt ltPu
blishedStartTimegt 2001-04-07T190000.000100
lt/PublishedStartTimegt ltPublishedDurationgtPT00H45M
lt/PublishedDurationgt ltLive value"false"/gt ltRepe
at value"true"/gt ltFirstShowing
value"false"/gt ltLastShowing value"false"/gt ltFr
ee value"false"/gt lt/BroadcastEventgt

• XML is very verbose and not very suitable for
  broadcast, therefore...
• TV-Anytime defines data format
• Fragment Split document
• Encode Compact binary format (MPEG-7 BiM)
• Encapsulate Grouping and identification -
  containers
• Index Rapid access for searching (e.g. by CRID)
• DVB defines broadcast method
• MHP object carousel
• File names of containers
• Linkage for finding metadata required

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Metadata linkage
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Trailer booking

• Simple mechanism for promoting content
• Subtable carries data when content is being
  promoted
• Description of content
• CRID
• Receiver monitors for entries in subtable

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Trailer booking
Delivering the CRID with description alongside
trailer broadcasts
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Recording

• CRIDs resolve into locators
• Broadcast locator has 3 modes
• Time only mode - simplest mode
• Event_id mode - supported by EIT p/f
• TVA_id mode
• List of TVA_ids carried in EIT p/f
• Overlapping and nested programmes
• Programme status
• Starting shortly, running, paused, canceled

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The End

• Thank-you for listening