CoaXPress combines the best features of other interfaces into just one future proof hi-speed vision interface solution.

CoaXPress versus
Camera-Link

Camera Link disadvantages:

  • Short, stiff, thick & expensive cables
  • Connectors not field installable
  • Speed limited to Camera Link Full – 6 Gb/s
  • Power over Camera Link: limited power available, not supported by all cameras and frame grabbers

CoaXPress versus
USB-3

USB-3 disadvantages:

  • Speedwise a step back compared with CameraLink (comparable with CL Base)
  • Available power over USB is low: 4.5W
  • Cable length is limited to 3m, perhaps 5m – no slip ring use possible
  • Relies on CPU – load increases with speed
  • QoS questionable (certainly at highest speed)
  • No offloading of processing & buffering to frame grabber FPGA and memory
  • Only useful for low end applications – will mainly compete with IEEE-1394B (and GigE Vision 1Gb/s for short distances)
  • And for all: many conductors used, so slip rings are expensive!

CoaXPress versus
HD-SDI

HS-SDI / 3G-SDI / HDCCTV disadvantages:

  • Limited available bandwidth – not scalable
  • Optimized for TV standards only (480p, 575p, 1080i, 1080p etc)
  • Supports only continuous video (no asynchronous operation)
  • Scrambling is less robust than 8b/10b coding
  • No uplink to camera for communication & trigger (5 Mb/s foreseen for HDCCTV)
  • No power for camera (only foreseen in HDCCTV)

CoaXPress versus
10 GigE

10 Gig e disadvantages:

  • Power hungry: Relies on CPU and internal PC memory bus
  • Standard not very efficient with lots of data, more efficient due to own protocol (GigE has a much used interface with an own dedicated protocol with high reuse of hardware, protocol, standard and software at the PC.)
  • PnP discovery and operation under all circumstances needed: complex.
  • Network interface: You can not offload processing & buffering to frame grabber FPGA and memory
  • A network frame grabber is needed for direct vision processing / analysis and for more efficient image data transfer.
  • Bottleneck when using multiple cables: Image first has to be combined at a single point at the PC-side before further processing at 1 or more PC’s.
  • The single point PC has to do the work at a very high speed.
  • 10 GigE PHY’s and MAC’s are only used in server applications – lacks the benefit of commercial market pull
  • Cat-6/Cat-7 cables are inferior compared to coaxial cables (maximum speed, attenuation, flexibility, reliability, use with slip rings)
  • Power over cable, real time trigger possibilities are only planned in version 2.0 of GigE Vision
  • Applications using 10 GigE will need a frame grabber to offload CPU and memory of PC – an important benefit of GigE Vision is then gone.

CoaXPress versus
Cameralink HS

Benefits of CXP over HSLink:

  • Coaxial cables
  • Long length (even at higher speed) – Optical can run longer distance
  • Many cable options already available
  • High flex / high reliability (impossible with CX4)
  • Rugged / High temperature
  • Aerospace, Clean room compatible, …
  • Upgrade path for legacy systems
  • Low cost
  • Silicon designed for the specification (rather than specification written around available silicon)
  • Consortium member input into standard