Why HDcctv?

Market Migration to HD Surveillance

HD surveillance camera sales began in 2009 and continue to accelerate. The following chart illustrates an expected further acceleration in the migration to HD surveillance, enabled by advances in local-site transmission technology.


Camera Market October 2014

Which HD surveillance local-site transport solution is best? Installers and integrators have a wider variety of choices than ever before.

  • Ethernet (for MP IP cams) is the most flexible technology. There is no limit to the video resolution that Ethernet can carry. Ethernet is also well suited for some tricky wiring situations, or where wireless signaling is needed.
  • Specialised digital solutions (for HDcctv DT cams) is the highest-fidelity technology. DT transmission is bit perfect and instantaneous.
  • Specialised analogue solutions (for HDCVI cams) is the most resilient technology. HDCVI transmission works over any legacy infrastructure.

HDcctv technologies were developed especially for transporting HD surveillance video within secured premises. Installers depend on HDcctv cameras and DVRs for the same reliability, convenience, and affordability as sub-HD CCTV, but with stunning HD surveillance video. The result, reflected in the following chart, is that both MP IP cameras and specialised HD cameras are accelerating security's migration to HD surveillance.

Camera Market October 2014



Why HDcctv?

In one sense, every surveillance camera is an IP camera, because it is viewed and controlled remotely, over the Internet.

Think about your PC: It is connected to the Internet, but the peripherals (monitor, web cam, mouse, keyboard, external storage, etc.) may not be connected to the LAN inside your office; they may be connected to the PC over some specialised interface, such as HDMI or USB.

Surveillance systems are similar to I.T. systems: Each has a Wide Area Network (WAN) access point within the building. The DVRs are like PCs, to which the cameras are peripherals. As with PCs, DVR peripherals should be attached in a reliable, convenient, cost-effective manner that provides adequate performance. Even though we access surveillance cameras via the Internet, Ethernet is not necessarily the best way to connect surveillance cameras within secured buildings.

No matter how the HD surveillance signals are transported to the WAN access point inside the secured building, everyone wants HD surveillance, and now everyone can have HD surveillance that is reliable, convenient, and cost-effective, offering high-fidelity live views on site.

HDcctv DT 2.0 is a digital interface that delivers bit-perfect HDTV signals without any transmission-related artifacts or delays. DT 2.0 equipment is backwards compatible with HDcctv 1.0 and HD-SDI equipment.

Until 2010, the only option for HD resolution was to adopt MP IP cameras. Now, HDcctv cameras are an alternative. With HDcctv, security installers no longer need to extend a local-site IP LAN all the way to every HD camera mount in order to deliver the benefits of HD video. HDcctv 1.0 cameras re-use most existing coaxial cables, making it possible to easily upgrade some CCTV cameras, one by one, to Digital HD surveillance without any fuss. Meanwhile, by sending the video signal with no compression and without delay, HDcctv cameras usually deliver better live views than the MP IP camera alternatives. These advantages make HDcctv cameras worth considering also for applications that blend local-site security operations with remote, IP-network-connected security management.


Why Has the Migration to HD Taken So Long?

Every security customer would rather have HD surveillance than sub-HD surveillance, all else being equal.

Why, then, are the vast majority of security cameras sold in 2013 sub-HD cameras?

Technologies Limiting HD Surveillance

The answer is local-site transport solutions.

Expect this same scenario to play out for 4K surveillance. Ethernet is ready to transmit 4K video today, well ahead of mainstream lenses, sensors, ISPs, and HDDs.

Frequently Asked Questions

What is HDcctv DT 2.0?

  • HDcctv DT 2.0 (“Digital Transmission”) is based on HD-SDI and includes 100% multi-vendor Plug 'n' Play up-the-cable remote control.

What is HDCVI 2.0?

  • HDCVI 2.0 (Analogue Transmission) is a refinement of Dahua's HDCVI technology that ensures 100% multi-vendor Plug 'n' Play up-the-cable remote control.

Why does the HDcctv Alliance scope extend beyond HD-SDI?

  • The Alliance originally worked with HD-SDI (High Definition Serial Digital Interface) technology to the needs of surveillance.
  • The physical differences between broadcast studios and secured buildings provide incentive to develop enhanced capabilities.
  • The Alliance is pursuing two roadmaps in parallel to deliver standards with those enhanced capabilities.
  • These two roadmaps are based on technologies which address overlapping but distinct sets of end-market requirements.
  • It is common practice for a standards organization to manage more than one standard roadmap, thereby accommodating more than one technology.

What is the best HD surveillance local-site transport solution?

  • There is no one best local-site transport solution.
  • The Alliance expects installers and integrators to choose Ethernet for greatest flexibility, DT 2.0 for highest fidelity, and HDCVI 2.0 for greatest resilience.

Is HDcctv DT 2.0 reliable (within its operational range)?

  • Yes. DT is exactly as reliable as PAL/NTSC/HDCVI/etc.
  • A functioning DT channel is not likely to fail on its own.
  • Unsurpassed reliability is a great strength of DT.

Is HDcctv DT convenient? (Does it work over coax?)

  • Yes. DT works over most security infrastructures.
  • DT is far more convenient than Ethernet.
  • DT 3.0 is expected to be even more convenient than DT 2.0, transmitting over UTP as well as coax.

Is HDcctv DT 2.0 cost effective?

  • Yes. The various specialized HD local-site transmission solutions cost about the same to produce at comparable volumes.

Does HDcctv DT 2.0 offer superior performance to the alternatives (within its operational range)?

  • Yes.  Live-view fidelity of DT / HD-SDI is better than every other known alternative, hands down.

How is DT 2.0 different from HDcctv 1.0 and HD-SDI?

  • DT 2.0 adds PnP up-the-cable remote control to the HDcctv 1.0 capability set.
  • For example, DT 2.0-compliant camera is controlled by a DT 2.0-compliant DVR immediately when they are connected and powered up, without any extra control cables and without any technician intervention to establish the remote-control link.
  • DT 2.0 uses the exact same PHY for video as HDcctv 1.0. DT 2.0 equipment is assuredly interoperable with HDcctv 1.0-compliant equipment and is usually interoperable with generic HD-SDI equipment


HD Live Views

HDcctv cameras give the best live views, because no compression is required for transmission and there is no IP LAN in between the camera and a monitor on the local site.

Check out this side-by-side comparison from the 2012 HD Product Excellenct Awards: http://youtu.be/gnFMF30V3sw (select HD quality for the clearest comparison).