Professor: Michael Lyu Member: Jacky Ma Joan Chung

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Professor Michael LyuMemberJacky MaJoan
Chung

Multi-Model Digital Video Library
LYU9904
Multi-Model Digital Video Library
Multi-Model Digital Video Library
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Outline

• Works of First Semester
• Progress and New Feature
• Evaluation

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Works of First Sem
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System Model

• Building Video Databases
• Indexing the Video Contents
• Breaking the Video into Segments
• Retrieving Video

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JMPlayer

• Standalone Java Application
• Play video files over network
• Synchronized script
• Practice for playback of video

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Our Progress New Feature
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Applet

• Browser-enabled
• Integrate with browsers Chinese environment
• Thumbnail Library Interface
• Streaming playback of video
• Build upon functions of JMPlayer

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Query Panel

• An interface for user query and searching
• Under construction
• Will have
• full-text script search
• keyword search
• title search
• metadata search
• catagory

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Library Panel

• An interface for user to choose a video among the
  query result
• Features
• Thumbnails
• MouseOver description
• Similarity Scoring

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Player Panel

• The interface for video playback
• Features
• Synchronized script
• Play control
• Sound control
• Video infomation

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JMF

• Platform-neutral multimedia solution
• Support different network protocols
• Support for capturing and storing media data
• Support sending or receiving media streams in
  real-time
• Customizable Data Source and Controller

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Query Server

• Use XML to keep the records
• Use JAXPs DOM model to implement the data
  structure
• Load XML records when the server starts
• Multi-threaded to handle multiple requests

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XML

• Plain Text
• Data Identification
• Inline Reusabiliy
• Easily Processed
• Hierarchical
• Usage
• Traditional data processing
• Document-driven programming
• Archiving
• Binding

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JAXP

• XML supplies a universally portable structured
  data format, and Java technology supplies
  universally portable code
• JAVA API for XML Parsing (JAXP) provides basic
  functionality for reading, manipulating, and
  generating XML documents
• SAXParserFactory and DocumentBuilderFactory that
  give you a SAX parser and a DocumentBuilder

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SAX

• processes XML data like a text stream and alerts
  the application whenever something interesting
  comes along
• read-only system
• event-driven protocol
• takes little memory
• tends to be fast
• simply reacting to things, one at a time, as they
  come along
• lack of an in-memory data structure

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DOM

• A Document Object Model is a garden-variety tree
  structure, where each node contains one of the
  components from an XML structure
• document builder reads the XML data and then
  constructs a DOM

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XML

• tree structure of data
• plain text format
• easy to maintain and debug
• fields and attributes
• video and id
• title
• keyword
• script
• line and time
• iconsrc
• videosrc

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System Overview
Applet
click one of the icon
Query Server
video playback
User
XML
Video Library Database
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Evaluation
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JMF vs. Quicktime

• Choose JMF instead of QuickTime as our tool for
  video playback
• Platform Independence
• QuickTime is mainly for Macintosh and Windows
• Difficult for integration with other Java tools
• Java tools not support QuickTime, but JMF is a
  package of Java
• Consideration of Time to Study QuickTime
• Disadvantage of JMF
• The JMF API is not included by Java Runtime
  Environment, Java plug-in is needed

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Database vs. XML

• XML is plain text
• Client/Server and Server/Server communication is
  easy and convenient by sending the whole XML file
  between the two objects
• Much difficult for the communication of two
  database servers
• XML is vender independent

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Problem

• Chinese Capability
• Low performance Machine may not have smooth video
  playback

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Works to be finish

• 70 video clips in library
• Fully functional demo
• Fine-tuned user interface
• Bug-Fix!