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CLUE Framework. IETF 83 March 26-30, 2012 Mark Duckworth Allyn Romanow Brian Baldino Andy Pepperell. Agenda. Document changes from version 03 to 04 Framework structure Issues and proposals Simultaneous sets or mutually exclusive sets? Ticket # 7 – boolean “composed” attribute

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clue framework

CLUE Framework

IETF 83 March 26-30, 2012

Mark Duckworth

AllynRomanow

Brian Baldino

Andy Pepperell

agenda
Agenda
  • Document changes from version 03 to 04
  • Framework structure
  • Issues and proposals
    • Simultaneous sets or mutually exclusive sets?
    • Ticket #7 – boolean “composed” attribute
    • Clarify what “composed=true” means
    • site-switch and segment-switch attribute
changes since interim meeting
Changes since interim meeting
  • Clarify a consumer can choose a subset of captures from a capture scene entry
  • Clarify a stereo audio capture is different from two mono audio captures
  • Clarify what it means when coordinate information is not specified
changes since interim meeting1
Changes since interim meeting
  • Change name of "purpose" attribute to "content" and refer to RFC4796 for values.
  • Clarify simultaneous sets apply across all capture scenes
  • Remove sentence about lip-sync
  • Combine "capture scene" and "capture set" into a single concept
framework structure captures
Framework structure – Captures

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Media Capture 3…

Media Capture 2

Capture Scene N

Media Capture 1

Capture Scene 1

Attributes

Area of Capture

Point of Capture

Audio Channel Format

Composed/Switched

Encoding Group ID

more . . .

Attributes

Area of Scene

Scale

Entries

Entry1 (list of MCs)

EntryN (list of MCs)

Attributes

Simultaneous Sets

Set1 (list of MCs)

SetN (list of MCs)

Encoding Group N

Encoding Group 1

Note: each N can have a different value, they are not all the same

framework structure encoding groups
Framework Structure – Encoding Groups

Encoding Group N

Encoding Group 1

encodeGroupID

maxGroupBandwidth

maxGroupH264Mbps

Video Encodings

Encoding1 (ID, maxBandwidth, maxH264Mbps, maxWidth, maxHeight, maxFrameRate)

EncodingN(ID, maxBandwidth, maxH264Mbps, maxWidth, maxHeight, maxFrameRate)

Audio Encodings

Encoding1 (ID, maxBandwidth)

EncodingN(ID, maxBandwidth)

framework structure summary
Framework Structure Summary

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Capture Scene N

Simultaneous Sets

Capture Scene 1

Attributes

Encoding Group N

Encoding Group 1

parameters

Entries

Entry1 (list of MCs)

EntryN (list of MCs)

Attributes

Video Encodings

Encoding1 (parameters)

EncodingN(parameters)

Audio Encodings

Encoding1 (ID, maxBandwidth)

EncodingN(ID, maxBandwidth)

Media Capture N

Media Capture 1

Attributes

simultaneous set representation
Simultaneous set representation
  • Proposal – express it as mutually exclusive sets rather than simultaneous sets
    • More concise and scalable for cases with several mutually exclusive media captures
  • If using simultaneous sets:
    • {VC1, VC3, VC5} {VC1, VC4, VC5} {VC1, VC3, VC6}{VC1, VC4, VC6} {VC2, VC3, VC5} {VC2, VC4, VC5}{VC2, VC3, VC6} {VC2, VC4, VC6}
  • If using mutually exclusive sets:
    • {VC1, VC2} {VC3, VC4} {VC5, VC6}
ticket 7
Ticket #7
  • Propose Ticket #7 be closed, keep “composed” as a booleanattribute
  • Add clarifying text for the attribute and for examples, that information like “loudest panel stream plus PiPs” cannot be conveyed using these simple attributes
clarify when to use composed true
Clarify when to use “composed=true”
  • Proposal – separate “video composed” and “audio mixed” attributes
  • Composed=true means composition is artificial rather than a natural view
  • MCUs might avoid receiving composed video
scene coordination policy
Scene coordination policy
  • Propose “scene-switch-policy” attribute for a capture scene entry
    • {site-switch, segment-switch}
  • A capture scene entry that is neither site-switch nor segment-switch should omit this attribute
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