2. Presentation Outline
_ Overview
_ Since last time
_ Approach
_ Bottom up component level approach
_ IP Camera/802.11 Solution
_ MPEG4 Media Recorder/Zigbee Solution
_ Timeline
_ Estimated Budget
3. Overview
_ Wireless Video Sensor Network
Sensor nodes controlled by a central router/computer
Video, Audio, with motion sensor activation
Sleep mode, continuous and burst modes of operation
Mobile
Self Configuration
4. Protocols and Bandwidth Requirements
_ Video
MPEG4
_ Video Resolution
320*240
80kbps compressed
_ Wireless
802.11b/g
_
11/54Mbps
Zigbee
_ 250kbps
5. Definite Specifications
_ Web interface for displaying video
_ Self Configuration
_ Mobile
_ Battery Life
2 Hours with continuous, Week with burst mode
Range
30 Meters
_
6. Approach
_
3 Main options
Built from the ground up using components
Expensive
_ Tricky
_
Use an already available IP Camera
Cheap
_ Easiest
_
Use a media recorder with Zigbee transmission
Relatively Inexpensive
_ USB
_
7. Since Last Time
_ IP Network Attached camera reference designs
Too expensive
_ Dev kits $2500-$10000
_ Not designed with our purpose in mind
Much too complex with resources given
Red Tape
Little to no cooperation from manufacturers/sales reps
8. Component Approach
Build a design using a camera,
microphone, video/audio MPEG
encoder chip, wireless chip
_ Expensive
_
Each part is separately expensive
Development kits for individual parts
_
Complex
Getting the parts to work with one
another
Basically creating a reference board
design
9. IP Camera Approach
Widely available
_ Low cost
_
_
The camera, microphone,
compression and wireless
are built in
Built in web server
Linksys firmware is open
source under GPL
_
_
Modify to suit the project
requirements
10. Media Recorder Approach
Handheld Media Recorder
_ MPEG4 Compression
_ USB out
_
Zigbee as wireless protocol
Would make software to
display information on a pc
_
_
Complex drivers
_
Do not know what is being
output through USB port of
camera
12. Estimated Budgets
IP Camera Solution
Media Recorder Solution
IP Cameras (3)
$500
Wireless Router
$50
Media Recorders (3)
$400
XBee Development Kit
$300
Mobile Testbed (3)
$100
Mobile Testbed (3)
$100
Other Materials
$100
Other Materials
$100
Total
$750
Total
$900
Decision based upon power requirement
13. What is an IP Camera?
IP camera is a combination of a camera and a
computer. The camera can be connected
directly to the network. It has built-in
software for a web server, FTP server
and e-mail client. Some advanced versions
support motion detection and alarm
input/output ports.
14. Difference between IP and CCTV
Camera
• Analog CCTV systems connect to a DVR (digital
video recorder) using coax cables and BNC
connectors (not networked).
• IP Cameras connect directly to an existing
Ethernet network. This connection could be wired
or wireless and they can be accessed from
anywhere.
15. Difference between IP and WEB
Cameras
• WEB cameras must be plugged to a computer
to be used (USB connection). They have to
use the resources of the computer they’re
connected to.
• IP cameras are independent networking
devices that can be shared and accessed from
anywhere.
16. How does an IP Camera work?
• The Camera captures the image
• Captured images are transformed into electrical
signals
• These signals are converted from analog to
digital format
• Digitized signals are compressed and sent over
the network
17. Image resolution
• Digital image resolution is measured in Pixels
(640 x 480, 320 x 240)
• The more detailed an image, the more pixels
and the larger the file size
• Detailed images require more space on a hard
disk and more bandwidth for transmission
18. Image Compression
• For storing and transmitting images over the
network, they must be compressed or they will
consume too much disk space or bandwidth
• M-JPEG and MPEG4 are the common
standards used for image compression in IP
Cameras
19. M-JPEG vs. MPEG4
M-JPEG
• Less compression
• Better image quality
• Larger images and video
files
• More bandwidth required
• More storage space
MPEG-4
• More compression
• Lower resolution
• Reduces amount of
storage needed
• Reduces bandwidth
utilization by camera
• Allows more video to
store
20. Lens Questions
What are CCD and CMOS cameras?
Charge Coupled Device (CCD) and Complementary Metal Oxide
Semiconductor (CMOS) are the components in a camera that act as the
camera’s “digital film” and are responsible for resolution and overall quality of
the picture. CCD cameras have better light sensitivity, sharper images and
enhanced colors and are more expensive than CMOS cameras.
21. Lens Questions
What is the f number?
f# is the ratio of the lens focal length to it’s diameter
What is the focal length?
Focal length indicates how far behind a lens an image will form.
shorter the focal length = wider the angle of view
22. Questions
What are some specific network camera
applications?
» Security surveillance for Banks, Shops,
Offices, Warehouses……
» Remote monitoring of the house, daycare or
schools
23. Can I monitor my camera from
anywhere?
Yes
If on the same network, you need the camera’s IP address. If on the Internet,
you need the WAN IP of the router or a domain name registered with a
dynamic DNS provider. (Router must be configured for port forwarding)
24. Does my computer need to be on
all the time if I use an IP camera?
No
Once the IP Camera is installed and configured, it can be accessed from any
system using Internet Explorer.
25. Do I need a high speed Internet
connection to use an IP Camera?
YES (for remote access)
Dial-up connections don’t provide enough bandwidth for streaming video.
27. For “Home” user, the 1st question will be:
What’s the difference between IP cam vs.
Webcam?
True IP camera
PC-based camera
Place it anywhere.
The PC-attached camera needs to
You can connect the network
be within 3 meter (10 feet) of the
camera to the network, cell
PC.
Flexibility
phone, or wireless adapter.
Everything needed to stream live You will need 3 components: Web
Functionality
video over networks is included in camera, PC and PC software.
the network camera.
High scalability. Constructed
No Scalability
Scalability
under current network
environment
User CAN get individual videoUser CAN NOT get individual video
Personalization
profile, network protocol, bitrate
profile, network protocol, bitrate
per different network environment per different network environment
The cost of the network camera
Total cost of Web camera, PC and
Cost
only.
PC software.
28. For “SMB, Enterprise”, the reason to choose IP
camera:
Remote
accessibility
Save TCO
(Total Cost of
Ownership)
Central
manageability
Scalability
Distributed
intelligence
Smart
video mining
33. Multi-profile VIDEO- One network camera can fit in various
network environment.
MPEG4 and MJPEG Dual CODEC simultaneously
A-MTK internet cameras support multiple resolutions and multiple video compressions simultaneously. The
internet camera can generate different video stream per user’s command. For instance, in home environment,
the network bandwidth is limited. User can command network camera to generate “MJPEG, 320*240
resolution” for live view. In the same time, another user can command network camera to generate “MPEG4,
640*480 resolution” simultaneously. This is so-called “Multi Profile”.
MPEG4, QQVGA
MPEG4, QVGA
JPEG, VGA/
QVGA/ QQVGA
4 Multi-profile simultaneously
1.
MPEG4, QQVGA
2.
MPEG4, QVGA
3.
MPEG4, VGA
4.
JPEG, VGA/ QVGA/ QQVGA
(selectable)
MPEG4, VGA
34. Mega-pixel Video
1.3M CMOS sensor + Multi-profile
1.
In Mega-pixel mode, generate DUAL Mega-pixel profiles simultaneously: User can get both
snapshot and streaming video in Mega-pixel resolution.
2.
Megapixel is for superior image quality!
35. Network protocol- A-MTK Supports UDP/ TCPIP/ HTTP
The way for “video streaming”
Streaming
Pros
UDP
streaming
though rtp
port and
rtsp port
if bandwidth enough, user •if bandwidth is not enough,
can get the best image
IP cam will lose packet
quality
•UDP need MIS open all the
rtp and rtsp port and http
port
TCP/IP
streaming
though rtsp
port
User do not need to
enable rtp port, only rtsp
port and http port
The image quality is not as
good as UDP (but better
than HTTP)
HTTP
Streaming
MIS only need to enable
through http port (80) for both
port
streaming and webpage
The image quality is not as
good as UDP
Note: HTTP port is must for web UI
Cons
37. Pan & Tilt Control- PT(Z) IP cam
Auto Pan: Continuous panning
between horizontal end points
One click panning 5
rounds
Presets: User can manually
define any location as preset
points
Maximum 64 presets.
Preset name can be
defined
Camera Tour: Camera auto
patrol between “Preset” points
Maximum 16 camera
tour. One click one
round .
Manual Pan/Tilt control
1.
2.
Via 4 way
navigator
Click the image
window
Continuous Auto Pan and Camera Tour
User can set “Event schedule,“Schedule trigger”
After schedule trigger is setup ready, the IP cam will auto pan or camera “one
round every minute”.
38. Potential disadvantages of IP cameras
The following are some of the potential weaknesses of IP
cameras in comparison to analog CCTV cameras:
Higher initial cost per camera.
Less choice of manufacturers.
Lack of standards. Different IP cameras may encode video
differently or use a different programming interface. This
means a particular camera model should be deployed only
with compatible IP video recording solutions.
High network bandwidth requirements: a typical CCTV
camera with resolution of 640x480 pixels and 10 frames
per second (10 frame/s) in MJPEG mode requires about 3
Mbit/s.
Technical barrier. Installation for IP Camera required a
series of complicated network setting including IP address,
DDNS, router setting and port forwarding. This is very
difficult for most users to do alone without help from IT
technician.
39.
40. Conclusion
Having some kind of monitoring system at
home or office is always handy for owners. When
property owners are able to monitor homes or
offices with surveillance equipment, it's like they
have a television network devoted to the safety of
their properties. IP camera can just do the job. It
not only let owners know the condition of their
property from remote locations, but also keep
records. It is definitely an efficient surveillance
system at home and office to protect properties.
