Transcript Professor: Michael Lyu Member: Jacky Ma Joan Chung

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Multi-Model
Multi-Model Digital
Digital Video
Video Library
Library
Y
Professor:
Michael Lyu
Member:
L
Jacky Ma
Joan Chung
Outline
• Works of First Semester
• Progress and New Feature
• Evaluation
Works of First Sem
System Model
•Building Video Databases
•Indexing the Video Contents
•Breaking the Video into Segments
•Retrieving Video
JMPlayer
•Standalone Java Application
•Play video files over network
•Synchronized script
•Practice for playback of video
Our Progress & New Feature
Applet
• Browser-enabled
• Integrate with browser’s Chinese environment
• Thumbnail Library Interface
• Streaming playback of video
• Build upon functions of JMPlayer
Query Panel
•An interface for user query
and searching
•Under construction
•Will have
•full-text script search
•keyword search
•title search
•metadata search
•catagory
Library Panel
•An interface for user to choose a video
among the query result
•Features
•Thumbnails
•MouseOver description
•Similarity Scoring
Player Panel
•The interface for video playback
•Features
•Synchronized script
•Play control
•Sound control
•Video infomation
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
Query Server
• Use XML to keep the records
• Use JAXP’s DOM model to implement the
data structure
• Load XML records when the server starts
• Multi-threaded to handle multiple requests
XML
•Plain Text
•Data Identification
•Inline Reusabiliy
•Easily Processed
•Hierarchical
•Usage
•Traditional data processing
•Document-driven programming
•Archiving
•Binding
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
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
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
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
System Overview
Use browser to run,
Input query
Applet
click one of
the icon
Send query to
Video records
Video Icons shown
video playback
User
Query Server
Retrieve the video
Video
Library Database
XML
JAXP read the XML,
ready for request send
from client server
Evaluation
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
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
Problem
• Chinese Capability
• Low performance Machine may not have
smooth video playback
Works to be finish
• 70+ video clips in library
• Fully functional demo
• Fine-tuned user interface
• Bug-Fix!