Category Archives: Broadcast & Media

KVM Matrix Extension System Supports 4K60 Over a Single Cable

Extend 4K resolutions at 60Hz over a single fibre cable in a point-to point extension or multipoint-to-multipoint matrix configuration for the highest onscreen resolutions in post-production suites. DKM FX 4K60 Interface Cards support 4K60 in full, 8-bit color depth.

More production suites are deploying 4K monitors for viewing, live production, and post production. For example, the Black Box DKM solution is being deployed at fileCAST Media GmbH. The manufacturer of the new LiveLogging solution for its Online Media Library (OML) platform is using Black Box technology to extend signals and connect to live production multi-feed environments. The purpose is to tag media content from multiple sources during a live event. This will enable content owners to offer valuable media assets in a searchable format in near real time.

4K in post-production editing suites will enhance an editor’s ability to see how the finished product will appear. 4K extension at 60 Hz has been challenging in the past because 4K requires higher bandwidth. The DKM FX 4K60 cards can overcome this challenge because the system also uses high-speed interface cards to support high-bandwidth signals. In addition, control surfaces for post-production editing that use high-speed USB, such as DiVinci Resolve, can be deployed using these interface cards.

The DKM FX system is flexible, scalable, and highly reliable. Video standards supported by interface cards in the modular housing include DVI-D up to 2560 x 1600; HDMI up to 2560 x 1440; and DisplayPort 1.2 (4:4:4) resolutions up to 4K.

The DKM FX Modular Housing frames come in 2-, 4-, or 6-slot chassis with optional redundant power. The 21-slot frame is 1U for rackmounting in a server room or machine room. Fibre cable supports distances up 1000 metres over multimode fibre or 10 kilometres over single-mode fibre, which means editing and post-production suites can be in different buildings in a large enterprise solution.

For more information, call our application engineers at 00800-2255 2269 or use our online DKM configurator to plan your high-performance KVM extensions system.

Related Links:
Black Box Whitepaper: 4K video – piecing together the puzzle

8 Critical features next-generation KVM switching and extension systems should offer

Here’s a checklist to use as you shop for a future-proof, high-performance digital KVM switch or switching and extension systems. It’s easy to remember as FAR-PARSS.

Any enterprise-wide KVM system should be flexible enough to input and output many types of video and peripherals, especially if you are in broadcast or command and control. Video signals such as DVI, HDMI, and VGA should be supported with resolutions ranging from 1080p to 4K. Other signal types to look for are audio, USB 1.1 or 2.0 for peripherals like keyboards and mice, and serial signals for industrial applications.

A flexible system should also be scalable for future growth. Calculate the total number of video sources and displays you have, and try to plan for growth. The KVM switches need to support current and future users with enough ports so that users do not have to create silos of servers and users. Look for a KVM system that can replace a video-only router with a high-performance digital KVM matrix switching system. A management controller enables central administration of the system. Does the management controller use a graphical user interface, or a text-based OSD?

When a KVM system can support video resolutions of 1920 x 1080 at 60 Hz or 3840 x 2160 at 60 Hz, test to make sure video does not lag or drop frames with rapidly changing content. Not all analog KVM systems or IP-based systems are up to the task, although most digital systems, including digital IP-based systems, can support fast, high-definition video.

Test keyboard and mouse setup to make sure there is no latency. A true USB emulation KVM switch is responsive and consistent; an unresponsive K/M jars the operator out of his/her workflow.

Optimally, a high-performance digital KVM system improves users’ productivity. In a matrix setting, all resources and displays can be connected and switched between by multiple users. Collaboration is enhanced by the ability to view and control the same resources simultaneously.

Calculate the longest distance between your endpoints, and make sure the KVM system can work over CATx or fiber cabling – or a mix of both – to reach all your targets. With digital matrix KVM systems, multiple users should have real-time access to targets.

New generation KVM systems will support redundancy options such as multiple power supply units for 24/7 uptime. Be sure to eliminate single points of failure. Make sure the system you select can support routing transmitters and receivers through two separate core KVM switches for full redundancy.

Many digital KVM switching systems support video-switching speeds of under a half second. Anything longer interrupts an operator’s workflow as he or she switches between resources and may be noticeable to a viewer. Does your KVM solution support custom keyboard shortcuts (also called hotkey shortcuts) that can be set for switching a local display as well as remote displays, such as other user terminals for collaboration or a video wall?

Lastly, KVM switching and extension systems need to be secure. Be sure administrators can assign specific access rights to specific resources. Remote configuration and maintenance of the KVM system enables an admin to securely log onto a system.

When you can mark off all eight of these categories, you’ll have maximized your ROI.

View our webinar about how digital KVM benefits the broadcasting industry.

DisplayPort interface for 4K, explained

DisplayPort is the most recent digital video interface to be developed for commercial use. It is a standard for PCs.

The DisplayPort standard was designed as a replacement for DVI connectors on computer hardware. The connector is smaller and screwless for easier installation. The connector still has a locking mechanism to hold it in place, addressing a weakness of the HDMI connector. It is similar in specifications to HDMI, but it is more common for computers than for televisions.

DisplayPort uses a packet type of interface, just like an IP network does. The network-like design means a single connection can send multiple streams, so a single DisplayPort port can connect to more than one display.

DisplayPort uses very high speeds, enabled by the packet-type delivery that is implemented through chipsets. One can think of it as a high-speed network for digital video. DisplayPort uses a serial interface with up to four main data lanes that can carry multiplexed video and audio data. Each data lane supports a raw data rate of 1.62 Gbps, 2.7 Gbps, or 5.4 Gbps (DisplayPort 1.2 or later). Additionally, unlike with DVI, an audio channel is supported — up to eight channels of 16- or 24-bit at 48 KHz, 96 KHz, or 192 KHz.

DisplayPort and DVI
DisplayPort and DVI use different signal processing methods, but converting between the two can be done with adapters. Some DisplayPort ports have internal components to make them passively compatible with DVI signals, but this is not a DisplayPort requirement. This is known as Dual Mode, or DP++. It appears that DisplayPort is converted to DVI, but the hardware outputs a DVI signal through a DisplayPort port. If the hardware in use can’t output the DVI signal, then a DisplayPort-to-DVI adapter won’t operate. Users should look for the DP++ symbol.

DVI offers no audio support, which gives another advantage to DisplayPort. An additional advantage for DisplayPort is that packetizing data lowers demand on bandwidth. DVI uses separate data channels for each color, requiring high bandwidth all the time.

DisplayPort and HDMI
Since HDMI technology and DVI use the same signal technology, HDMI and DisplayPort have similar compatibility issues noted already.

HDMI is the digital standard targeted to home theater, and DisplayPort was developed for use with computer electronics. However, feature-wise, DisplayPort is very similar to HDMI, including the inclusion of the HDCP content-protection standard.

Some differences include:

  • DisplayPort has a maximum bandwidth that is larger than the maximum bandwidth of HDMI (10.8 Gbit/sec, compared to HDMI at 10.2).
  • DisplayPort supports DPCP (DisplayPort Content Protection) standard in addition to HDCP.
  • DisplayPort is an open standard, available to all manufacturers at no cost; HDMI is licensed, which raises costs.
  • DisplayPort supports resolutions up to 4K.

For additional information on 4K-ready DisplayPort solutions, visit