digital video interface comparison for global security applications
Post on 14-Apr-2017
1.667 Views
Preview:
TRANSCRIPT
1
Move from Analog to Digital in Global Security Systems
Which interface is best?
2
Video interface requirements for global security systems:• Minimize SWAP-C
- Number of cables needed for interfacing- Size and number of connectors needed for interfacing- Power consumption of interface- Cost of cables
• Long cable lengths and flexible cables for routing throughout vehicles and use with slip rings
• High reliability• Support HD resolution (color) at 60 frames/second and enable
various image formats for backwards compatibility• Allow for upgrades to greater resolutions in the future
- New CMOS sensors will enable even greater identification capabilities, sensitivity in low light situations, and recognition from greater distances
3
A quick overview of the specs
4
Camera Link (Single Cable)• Pros
- Well-established standard that is reliable for short distance connection
- Enables various image formats - Good for upgrade of camera in existing system using
Camera Link- Power over the cable is optional
• Cons- Limited bandwidth (only up to 30 fps possible with full HD
color)- Does not allow for future upgrades of greater resolutions- Short, stiff, expensive cables
5
HD-SDI/3G-SDI
• Pros- Well-established interface that is good when standard
HDTV is good enough for system - Upgrade of camera in existing system that is already
using HD-SDI • Cons
- Does not allow for different image formats or greater resolutions than HD (TV focused)
- Extra cables for power, communication, triggering etc. are required
6
GigE Vision
• Pros- Provides a traditional way of setting up video networks- Long, flexible, inexpensive cables
• Cons
- Large R45 connector- Processing required to pack and unpack video generates
additional heat and uncertain latency (reliability issues)- Bandwidth limited (no HDTV without compression possible
over GigE)- Accurate triggering over the cable may be difficult to
implement
7
USB3 Vision
• Pros- Commonly known standard based on consumer interface- No frame grabber required (interface card required)
• Cons
- Large connector and interface driver- Maximum throughput unpredictable (chipset, PC
motherboard and driver dependent) - Sustainable speed is much lower than theoretical limit- Unreliable operation with longer cables (>3 m)
8
CoaXPress• Pros
- One interface standard for systems today and in the future –moving to 12 Gbps per cable
- One flexible cable solution (includes power over cable): lowest SWAP and Cost
- One cable interface - EMC/EMI friendly- Backward compatibly with 75 Ohm Coaxial cable (when
using existing infrastructure like HD-SDI or even analog)- Any display format is possible - Low latency and stable video transfer, reliable with
hardware control through direct memory access• Cons
- Requires a frame grabber- Relatively new standard, not yet well-known in the
industry
9
Overview of Pros and Cons
10
EUROPE ● N-AMERICA ● JAPAN ● ASIA-PACIFICAdimec.com
www.adimec.com
top related