CoaXPress standard gains approval
The Japan Industrial Imaging Association (JIIA), host of the CoaXPress high-speed digital interface standard for imaging applications, has announced that the first edition of the standard has been overwhelmingly approved by its working group and liaison group, which consists of the Automated Imaging Association (AIA) in the USA and the European Machine Vision Association (EMVA).
Representatives from both groups voted on the standard and the results, which were released recently, showed 31 votes in favour, none opposed and 2 abstentions.
The JIIA also announced the launch of a compliance test procedure to test and approve CoaXPress devices as officially compliant products. This compliance programme will also manage the permissions required to use the CoaXPress name and logo. Additional details of how this process will work will be announced later this year.
Following this successful ratification of the standard, referred to as ‘JIIA NIF-001-2010 CoaXPress Standard Enacted on Dec. 6, 2010 First Edition’ the specification is going through a three-month international appeal process, during which interested parties can comment on a wide range of technical and legal areas. The result of this process, which has been agreed upon by the JIIA and the two other major industry organisations - the AIA and the EMVA - will be announced at Automate 2011 in Chicago, USA, and will pave the way for CoaXPress to become an international standard.
“We are well on our way to making CoaXPress a global and widely adopted standard for high-speed digital data transmission,” commented Tadashi Miyazaki, Chair of JIIA CoaXPress Workgroup.
“The voting results demonstrate the universal approval for the technical validity of the approach, as well as the support for a next-generation method for enabling flexible, high-speed connectivity between the components of imaging systems, including multiple cameras, frame grabbers and image-processing servers.”
CoaXPress is a digital interface specification that enables data to be transmitted at a high speed over a single coax cable - at up to 6.25 Gbps - from a device, for example, a camera, to a host such as a frame grabber, installed in a PC. The device need not be a single camera. It could, for example, be an interface device that concatenates data from several cameras, since CoaXPress has the ability to carry many channels of image data and meta-data.
For communication from host to device, there is a 20 Mbps “uplink” for control and configuration data. For even higher speeds, links may be concatenated to provide multiples of the single coax bandwidth. Power is supplied over the cable (24 V, at up to 13 W per cable). CoaXPress works over relatively long cable lengths, depending on the precise cable type – up to 40 m at 6.25 Gbps and much further at lower speeds.
One of the great benefits of CoaXPress is its ability to use rotary joints and slip rings. These are typically used in defence, robotic, surveillance and broadcast applications where continuous panning is often required. The availability of low-cost radio frequency (RF) rotary joints opens up many options for high resolution and multiple image/data channels in continuous panning applications, says the JIIA.
The significant interest in this from markets outside machine vision has led to the formation of an “Adopters Group”, whereby organisations for which machine vision is not a significant part of their business may gain access to the CoaXPress specification.
‘JIIA NIF-001-2010 CoaXPress Standard Enacted on Dec. 6, 2010 First Edition’ can downloaded from the JIIA Web-site at the address given below.
Japan Industrial Imaging Association
2-10-15, Nakameguro, Yamate Avenue
K Bldg., Meguro, Tokyo 153-0061