Now let us take a look at the actual situation. The surrounding world has entered or is entering the AV Over IP mode. During the transition of the era to digital AV, many amazing products and technologies have emerged, but they also bring some complexity. Trouble. Nowadays, we no longer need to use big data cables and switch racks to transmit video and computer display signals. Instead, we can use a digital display interface with a suitable resolution to more easily confirm whether copy protection is required, and at the same time bear the control signal and power supply. , And even Ethernet traffic.
Another change is that there are now some things turning the cart before the horse. This means that the world of consumer electronics largely determines the commercial AV products we will use in the future. The High-Definition Multimedia Interface (HDMI), which was launched in 2002 and is now installed on more than 1 billion devices worldwide, is a good example.
In the beginning, HDMI was only used to transmit signals from DVD or Blu-ray players to the TV, but now it has become the core of large and complex AV matrix switching products including various cable extenders. Not only that, the Minimized Differential Signal Transmission (TMDS) format used by HDMI can also be converted into data packets transmitted by structured cables and optical fibers.
However, in today’s “everything is based on IP” era, bet on dedicated display/audio formats that require frequent updates and are most likely to be beaten by ultra-high-definition displays with 10-bit and 12-bit high frame rate video content. Is it wise? Wouldn’t it be wiser to configure AV and control signals to be able to transmit over high-speed public and private IP networks (both internal and external)?
So the first question is, can it be done? The answer is obviously yes, and telecommunications companies and cable, satellite, and regional broadcast and television networks have already done it. A combination of low-cost telecommunications and Internet switching equipment, coupled with low-cost structured cables and cheap optical fibers with quick-crimp connectors, can simulate the installation of 1 GB and 10 GB networks.
The next question, how to do it? Common codec languages such as AVC H.264 and the new High Efficiency Video Coding (HEVC) H.265 can be used. Both codecs can compress the video signal to a small size, generate a manageable streaming rate, and adapt to the available network bandwidth. And, if these codecs have latency problems, you can also use "zero" compression encoding (JPEG2000) to transmit full-bandwidth high-definition video, or even ultra-high-definition video.
These (compressed/uncompressed) audio and video streaming media are transmitted in the form of data packets "wrapped" in a virtual envelope, and the signal destination that needs them is found through the Internet protocol. Watching/listening to an AV stream is as simple as dialing an IP address, and the system has huge scalability.
Advanced KVM, visualization and AV-over-IP solutions
Nowadays, we can abandon the costly and complex matrix switcher, and use ordinary network switcher to complete this work. The only requirement is that these switches need to support layer 3 of the Open System Interconnection (OSI) model. This means that any layer 3 switch can be used to build or update an AV-over-IP network, and only a network interface card is required to connect to displays and other devices.
What about monitors and other products that rely on standard display interfaces such as HDMI, DisplayPort, or even DVI instead of using an interface card? The answer is simple: add a small and cheap external interface box or interface card to convert the signal from AV-over-IP into the corresponding display format. Need to update or replace an interface? Only need to replace the interface box and interface card.
Now, all your AV content is interconnected through a network switcher (NP Pro IP Based Security Control,NP Lite AV KVM Over IP Control ), and you only need to use two types of cables (preferably faster CAT6 cables) and/or optical fibers to connect to the network All devices in the. As long as your switch is fast enough and the cable specifications are correct, you don't need to worry about bandwidth limitations. This technology will not become obsolete in the future.
Of course, you need to improve the network and understand IP knowledge and terminology in order to design and use the AV Over IP system(Video wall control software design). But it's worth your time to understand how AV content and IP equipment can intersect more effectively. Moreover, among the devices controlled and/or controlled by the IT department of iSEMC, the concept used by AV Over IP is fully in line with their wishes.
After converting the signal into a data packet, you can flexibly multiplex the signal from one source to multiple destinations: you can multiplex video, audio, control, and Ethernet in the same cable Traffic and high-speed data traffic, bid farewell to the headache of standards and format issues.
