20011004-Streaming-Agnew.ppt

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



Descriptive Metadata for DV

Dublin Core

MPEG-7

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





“Lowest common denominator”

Promote interoperability

Every data element is optional,

repeatable

Requires Application Profile

DUBLIN CORE

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)





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



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

http://www.library.gatech.edu/vide/videoaccess

http://www.library.gatech.edu/vide/videoaccess



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>



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. Season1, Episode 7 </title>



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>



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>



Format – The physical or digital manifestation of the resource.

DCMI Qualifiers:

FormatExtent

FormatMedium

DIGITAL VIDEO ACCESS STRATEGIES DIGITAL VIDEO ACCESS STRATEGIESGrace Agnew 2001-10-04 Virtual Members Meeting 13

FormatExtent

ViDe recommends the following subelements, separated by “semi-colon space”:

duration (hours, minutes, seconds);

frames per second (KB or MB);

data rate (KB/s or MB/s;

sound or silent;

color or b&w;

file size (KB, MB or GB)


Grace Agnew 2001-10-04 Virtual Members Meeting g 14

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>



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>



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.



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



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.



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>



<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>



<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>



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



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



• DDL = XML Schema Language

• Efficient transport & storage

• Synchronization between content and description

• Extrinsic/Intrinsic

• Textual format/Binary Format

MPEG-7



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



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.

http://archive.dstc.edu.au/RDU/staff/jane-hunter/m6500.zip









Use Segment DS and SegmentDecomposition DS to create interoperable component videos and “bookmarks” from video files


<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>

<Duration><00:10:05;3></Duration>

</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>

<Duration><00:10:05;3></Duration>

</VideoSegment>

Disclaimer: MPEG-7 encoding is for illustration only and may not represent accurate encoding according to the schema




Use SequentialSummary DS and HighlightSegment DS to create a keyframe summary or highlights component video




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.

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