DIGITAL VIDEO ACCESS STRATEGIES Grace Agnew 2001-10-04 Virtual Members Meeting 1 “ Data or...
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DIGITAL VIDEO ACCESS STRATEGIESDIGITAL VIDEO ACCESS STRATEGIES
Grace Agnew 2001-10-04 Virtual Members Meeting 1
“Data or information which help us perform one or more
of the following functions with respect to data and information resources:
• Finding
• Interpreting/evaluating
• Accessing
• Analyzing
• Managing
• Preserving”
Boyko, Ernie. “Statistical Metadata: A User Perspective.” Open Forum on Metadata Registries. January 20, 2000.
Definition of Metadata
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Descriptive Metadata for DV
Dublin Core
MPEG-7
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MODEL
Record Structure
Repository
Design
Data Element Registration Database
Population
Dissemination to Users
Data interchange
(other repositories)
Metadata is organized into repositories to facilitate shared information discovery and retrieval
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“Lowest common denominator”
Promote interoperability
Every data element is optional,
repeatable
Requires Application Profile
DUBLIN CORE
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METADATA RECORD
Populated with meaningful information (“values”)
Data Elements
According to rules (“Schema”)
Rules:
• Data element (e.g. controlled vocabulary; formatting; prescribed value list or formatting rule)
• Record structure: data element constraints: (mandatory, recommended, optional) (repeatable) (order of elements)
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Content IntellectualProperty
Instantiation
Title Creator DateSubject Publisher TypeDescription Contributor FormatSource Rights IdentifierLanguageRelationCoverage
Metadata Element Set v. 1.1 http://www.dublincore.org/documents/dces/
Fifteen optional, repeatable elements
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ViDe Video Access Working Group
Application Profile for Digital Video:http://www.library.gatech.edu/vide/videoaccess
Select: Reports & Documents
Includes demonstration database in MS Access 2000
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Creator / Contributor / Publisher
Agents and Roles. Recommend addition of qualifier “role” with controlled vocabulary such as MARC Relator list:
XML Examples
<creator role=“producer”>Spielberg, Steven</creator>
<contributor role=“lecturer”>Agnew, Grace</contributor>
<publisher role=“distributor”>Trimark Films</publisher>
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Title – recommendations for creation and format of titles for Segments; Excerpts; Trailers; Series (e.g. television series)
XML Examples:
<title>Jurassic Park. Trailer</title>
<title>Jimmy Carter Interview. Excerpt</title>
<title> Flintstones. Season 1, Episode 7 </title>
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Date – date of an event in the lifecycle of the resource
Add Qualifier “withdrawn” to support automatic removal of video files and automatic notification of removal.
XML Example:
<date type=“withdrawn”>2001-11-30</date>
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Description
Add the qualifier “genre” with a recommended list of values from ViDe:
Examples from ListArt work (video art); Classroom lecture; Diagnostic or surgical procedure; Instrument or sensor reading; Newscast; Panel discussion; Videoconference session …
XML Example:
<description type=“genre”>videoconference session </description>
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Format – The physical or digital manifestation of the resource.
DCMI Qualifiers:
FormatExtent
FormatMedium
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FormatExtent
ViDe recommends the following subelements, separated by “semi-colon space”:
duration (hours, minutes, seconds);
frames per second (KB or MB);
data rate (Kbps or Mbps);
sound or silent;
color or b&w;
file size (KB, MB or GB)
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Start and stop times may be included for excerpts from sequential media
XML Examples:
<format type=“extent”> 1 min., 47 sec.; 30 fps; 200 Kbps; sound; b&w; 296 MB </format>
<format type=“extent”>
<start scheme=“SMPTE 12M-1986”>00:24:03;1</start>
<end scheme=“SMPTE 12M-1986”>00:25:50;7</end>
</format>
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FormatMedium: ViDe Recommended Extensions to MIME type:
application/vnd.quicktimeVR
application/vnd.flash
video/mpeg1
video/mpeg2
video/mpeg4
XML Example:
<format type=“medium”>video/mpeg1</format>
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Relation: Related resources. DCMI recommends a unique identifier.
ViDe is using the Relation field to bring together different instantiations of resource:
Analog original (e.g. VHS tape)
Preservation Format (e.g. Beta-SP or DigiBeta)
Digital Master (e.g. uncompressed AVI)
Use copy (e.g. MPEG1, MPEG4, RealVideo file, etc.
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ViDe recommends the following qualifiers, which are formatted like the original Dublin Core elements. All qualifiers are optional except Relation.Identifier, which must be included if the Relation element is used: RelationTitle
RelationIdentifier
RelationFormatMedium
RelationFormatExtent
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Type – nature or genre of the content of the resource.
DCMI currently recommends “image” be used for video as part of their recommended list of types.
ViDe proposes adding :
animation
video
to the list.
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This Presentation in XML:
<title>Digital video access strategies</title>
<title type=“alternative”>Fall 2001 Internet2 Virtual Members Meeting. Presentation</title>
<identifier>http://www.internet2.edu/ramgen/vimmfall2001/presenters/GraceAgnew.rm </identifier>
<creator role=“speaker”>Agnew, Grace</creator>
<publisher>Internet2</publisher>
<date>2001-10-04</date>
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<format type=“extent”>25 min.; 15 fps; 200 Kbps; sound; color; 340 MB</format>
<format type=“medium”>video/vnd.real</format>
<type>video</type>
<description type=“genre”>lecture or speech </description>
<rights>This video is copyright-protected and is available for replay only. Contact the author, Grace Agnew, for requests for reproduction in any form.</rights>
<subject>Dublin Core</subject>
<subject>MPEG-7 Multimedia description content interface </subject>
<subject>ViDe. Video Access Working Group</subject>
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<relation type=“HasFormat”>
<identifier>http://www.internet2.edu/vimmfall2001/presenters/GraceAgnew.
ppt</identifier>
<format type=“medium”>application/vnd.ms-powerpoint
</format>
<format type=“extent”> 29 slides; 30 KB </format>
</relation>
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MPEG-7 “Multimedia Content Description Interface”
MPEG ISO/IEC Standard in 2001-09
Data Definition Language (DDL – XML Schema)
createsDescription Schemes (such as creation, usage, etc.)
Descriptors
Populated by
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Content Organization CollectionsModels
Content Management/Description
Creation & ProductionUsageMediaStructureSemantics
Navigation & Access SummariesViews Variations
User Interaction User PreferencesUser History
MPEG-7 Description Schemes
R
O
L
E
S
S
C
H
E
M
E
S
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• DDL = XML Schema Language
• Efficient transport & storage
• Synchronization between content and description
• Extrinsic/Intrinsic
• Textual format/Binary Format
MPEG-7
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MPEG-7
MPEG-7
Textual Encoder
MPEG-7
Textual Decoder
Content description
MPEG-7
Binary Encoder
MPEG-7
Binary Encoder
Content
Access Unit -Textual Format
Access Unit
Binary Format
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Collaborative Projects
Develop MPEG-7Application Profile for Descriptive Metadata using Creation & Production, Media, and Usage DSs.Reference: Hunter, Jane"A Proposal for the Integration of Dublin Core and MPEG-7",SO/IEC JTC1/SC29/WG11 M6500, 54th MPEG Meeting, La Baule, October 2000http://archive.dstc.edu.au/RDU/staff/jane-hunter/m6500.zip
Develop a Digital Video Portal supporting Dublin Core and MPEG-7 descriptive metadata – ideally as input and output formats. Would support data mining via the Open Archives Initiative Protocol. Also would be used to develop and test directory-based Digital Rights Management on distributed video assets. Learning and research tool for video access methodologies.
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Use Segment DS and SegmentDecomposition DS to create interoperable component videos and “bookmarks” from video files
Collaborative Projects
<VideoSegment id=“S1”>
<TextAnnotation> <FreeTextAnnotation>Man in a funny hat. </FreeTextAnnotation></TextAnnotation>
<CreationMetaInformation><Creation><Creator>Jones, Tommy.</Creator></Creation></CreationMetaInformation>
<MediaTime><MediaTimePoint>00:27:13;7</MediaTimePoint></MediaTime>
<MediaDuration><00:10:05;3></MediaDuration>
</VideoSegment>
<VideoSegment id=“S2”>
<TextAnnotation> <FreeTextAnnotation>Man with a funny moustache. </FreeTextAnnotation></TextAnnotation>
<CreationMetaInformation><Creation><Creator>Jones, Tommy.</Creator></Creation></CreationMetaInformation>
<MediaTime><MediaTimePoint>00:27:13;7</MediaTimePoint></MediaTime>
<MediaDuration><00:10:05;3></MediaDuration>
</VideoSegment>
Disclaimer: MPEG-7 encoding is for illustration only and may not represent accurate encoding according to the schema
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Collaborative Projects
Use SequentialSummary DS and HighlightSegment DS to create a keyframe summary or highlights component video
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Collaborative Projects
Use the Collection DS to concatenate materials “on the fly” into a collection, e.g. pulling images, video, audio and text together to create a term paper.
Scenario: A student is doing a paper on WWII and wants to include photographs of the war in Europe as well as video footage from a documentary. Fair use allows him via a DRM implementation to create a 5 second component video, which he creates as a named segment and concatenates into a collection using a menu-driven form.