Crystal Vision’s Linear Keyer Works With IP And SDI

Crystal Vision has released the M-KEY linear keyer that works with IP (SMPTE ST 2022 and ST 2110 video), with SDI or with both IP and SDI at the same time.

The M-KEY software app can key one externally-generated graphic over a video stream or a matte and is a traditional linear keyer designed for those who use a character generator or graphics PC to provide their key and fill sources. It is for use in channel branding and graphic overlay applications, while the mixed IP/SDI I/O means that it can provide a solution for those using SDI caption generators to key into an IP feed (the SDI to IP conversion included in the cost of the keyer).

The software runs on the MARBLE-V1 media processor hardware, a card housed in the Vision frame which features a CPU/GPU processor and both SDI and 10GbE IP network interface connections.

Explained Crystal Vision's MD, Philip Scofield: “The M-KEY app is another building block towards making IP and mixed IP/SDI systems that are more flexible and better value than pure SDI solutions. The mixed IP and SDI input is particularly useful for using SDI graphics generators in an IP environment.”

The product offers the user a choice of keying modes – with the key generated using either External Key mode or Self Key mode and with both additive and multiplicative keying available to suit different types of graphics. The keyed graphic can be faded in and out, either manually or as a timed transition, while crops can be used to prevent keying in particular areas of the picture by forcing areas of background or foreground. The Min Clip and Max Clip controls can be used to change the key gain, with adjustable thresholds to force or remove areas of key – for compensating for a key signal which does not have enough amplitude to force full keying or for creating a semi-transparent effect for the graphic.

“The M-KEY's support for multiple signal formats gives the easiest possible SDI to IP upgrade, while also making it perfect for mixed SDI and IP installations as well as fully IP or fully SDI environments,” added Schofield. “Its gateway functionality can be used to integrate SDI into an IP environment or IP into an SDI environment.”

The IP to IP translation functionality can be used for network address translation, protocol conversion between any of the input and output formats, unicast to multicast address conversion and the creation of media firewalls. IP flows can be separated and protected across up to four bi-directional 10GbE SFP+ network interfaces. It includes output traffic shaping and is tolerant of any input packet distribution.

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