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