Download ppt - Electrical & Computer Engineering, ECE Faculty Advisor Wayne Burleson Team Members Chinedu Okongwu Andrew Maxwell Awais Kazi Collaborators W. Richards

Electrical & Computer Engineering, ECE

Faculty Advisor

Wayne Burleson

Team Members

Chinedu OkongwuAndrew Maxwell

Awais Kazi

CollaboratorsW. Richards (Rick) Adrion, Professor of Computer Science

Paul Dickson, Computer Science PHD Student

Snapshot

2Electrical & Computer Engineering, ECE

Have you ever wanted to have your own production of something happening right now in a compact, easy to share, portable way?

WE ALL HAVE!• Lecture• Special Guest speaker• Review session• Media event

There is a need to automatically put together any event in real time, and be able to share it quickly and easily right then and there if needed.

SNAPSHOT

BACKGROUND


SNAPSHOT

Snapshot is...• Portable, easy to use device that automatically

• Captures• Authors• Playback a desired event• All done in real-time!

Delivers high resolution “SNAPSHOTS” of an event as the event is happening.


Haven't I seen this before?

Yes• AnySteam Apreso Classroom

• Networked System Only• Audio, no video• Long time to load• Indexed based on arbitrary times

But not like SNAPSHOT• Networked or stand-alone (portable)• Audio & Video• Quick load all at once• Indexed based on what is happening


DELIVERABLES

Design & Develop• Complete documentation and specifications

• User Guide• Two working prototypes

• Laptop driven• All-in-one system

• Validation• Real-world testing scenarios

• Lectures (Main testing scenario)• Review sessions• Guest speakers• Media events


Principle of Operation

3-Step Process• Capture• Authoring• Playback

Capture

Playback

Authoring


CAPTURE

Capture needed information• 3 Inputs

• Laptop• SNAPSHOTS are taken via VGA2USB framegrabber

• Video• Recorded, stored in memory

• Audio• Recorded from wireless microphone, stored in memory


AUTHORING

Real-time processing of lecture materials• Computer Capture Software

• Generates SNAPSHOTS of lecture material• Timing data

Process Audio and Video• Break up video and audio into SNAPSHOTS of them from

timing data

Merge all 3 into JMANIC Presentation• JMANIC is Courseware developed by UMass CompSCI

department for distance learning• The audio and video are compressed before merge


PLAYBACK

• Final Product– JMANIC Presentation

• Final files composed in one directory

• Slide window– SNAPSHOTS of lecture material

• Video window

• Clickable table of contents– Navigation through presentation

– Output• Saved to thumb drive via USB

• Playback by simply selecting one file


Equipment

• Epiphan VGA 2 USB– Sends analog VGA signal through the USB 2.0 bus

after converting it into a digital image

• Camera– Take 640 x 480 resolution frames– AT 28 frames per sec


Data Rates, Video & Audio

Digital Video Camera• At 640 x 480 to 800 x 600 resolution• Data Rate is about 96-150Mbits/sec.

The Data Rate for the USB 2.0 bus is up to 480Mbits/sec.

Audio• Wireless mic connected to camera• Wireless mic connected directly to computer

Output file size• About 200MBytes

• Depending on length of presentation


Equipment cont. & costs

All-in-one System• Embedded Linux Boards (ongoing research)• Needs to have

• USB Ports (At least 2)• Audio in port• LCD Display/VGA out

Costs• Epiphan VGA2USB - $200• Board - $200-$300• Total about $500


System Diagram


What we will do