The Evolving Specification for the HDcctv Standard


HDcctv 2.0 is Current

5 March 2014

The HDcctv equipment market continues to grow quickly: The worldwide retail market value for HDcctv equipment surpassed US$1B in 2013, including both HD-SDI and certified HDcctv-compliant products.


HDcctv 1.0 and HD-SDI

HDcctv 1.0 was ratified in 2009. HDcctv 1.0 is based on SMPTE 292M (HD-SDI), with the addition of rigorous compliance testing. Certified HDcctv-compliant products deliver plug 'n' play interoperability. Not all HD-SDI cameras are yet certified HDcctv compliant, and non-certified products have been known to disappoint; savvy buyers know to look for the HDcctv compliance mark to be sure.

 HDcctv Base Logo

HDcctv 2.0

HDcctv 2.0 was ratified in February 2014. HDcctv 2.0 adds up-the-cable remote control to HDcctv 1.0. Each 2.0 camera is a Slave, sending video to a channel that includes exactly one Master (a 2.0 DVR, matrix, IP encoder, monitor, etc) and any number of Observers. The remote control is plug 'n' play, and the Master-Slave link is established automatically at power-up.

HDcctv 2.0 also introduces alternative physical-layer transmission technologies (PHYs) in addition to HD-SDI-based transmission. All HDcctv 2.0 solutions carry common protocols, for maximum interoperability.



HDcctv 2.0 NR ("NR" derives from "Normal Reach")

HDcctv 2.0 NRTM adds plug 'n' play remote control to the underlying HD-SDI-style transmission.

2.0 NR compliance mark

HDcctv 2.0 NR products are fully backward-compatible with HDcctv 1.0 products. HDcctv 2.0 NR transmits bit-perfect HDTV signals over the same cable distances as HDcctv 1.0.


HDcctv 2.0 AT ("AT" derives from "Advanced Transmission")

HDcctv 2.0 ATTM transmits uncompressed HDTV signals over any conventional CCTV cable, using the common HDcctv 2.0 up-the-coax remote-control protocol.

HDcctv 2.0 AT compliance mark

HDcctv 2.0 AT is based on HDCVI technology, introduced by Zhejiang Dahua Technology Co., Ltd., in 2013.


Future HDcctv Standards

Future versions of the HDcctv standards will build on the 2.0 transmission technologies, as well as potentially adding transmission solutions for even more media:

  • Power up the cable
  • Fibre optics: 10km, 30km, 50km laser classes
  • Wireless transmission: ~ 50m
  • Unshielded twisted pair transmission
  • Audio
  • Higher resolutions: 4K (8 megapixels), 8K (30 megapixels) and beyond, as sensors, codecs, HDDs, networks, and monitors accommodate
  • Higher frame rates: 720p240 and higher, for high-speed applications such as traffic monitoring

The contents of the HDcctv standard, and the timing of new versions of the standard, are determined collectively by HDcctv Alliance Members.