Tag Archives: Streaming Encoder
In the AV industry we pride ourselves on providing the best-quality audio and visual communication to our clients. One way in which we can do that is to offer video solutions in 4:4:4 color.
When digital video was first introduced, video files sizes were large in relation to storage and transmission capabilities. One of the ways to address these larger file sizes was to introduce “chroma sub sampling.” In digital video there are two main components; Luminance and Chrominance. Luminance (or contrast) is the difference between the lightest and darkest parts of an image. Chrominance is the color saturation of an image. The human eye is very sensitive to small changes in contrast (Luminance) and is less sensitive to changes in color saturation (Chrominance).
To make digital video files more manageable, compression was introduced. A true-color video signal (4:4:4) includes all of the red, green, and blue color information of each pixel. In a 24-bit system, there are 8 pixels for each color and thus 24 bits in true color. Chroma subsampling reduces file size by removing color. In the AV world, the most common color space is 4:2:0, which is DVD quality. However, with 4:2:0 quality, the viewer is only seeing 50% of the available color. To make up for that loss of color, the pixels that were removed are recreated by borrowing or “interpolating” from the adjacent pixels. In some instances 4:2:0 quality is perfectly acceptable. In other instances however the chroma sub sampling provides the viewer an experience that is less than optimal.
I can think of at least three instances in which 4:4:4 color is required:
- Telemedicine: Surgical procedures streamed over a network require extremely accurate color information on the receiving end.
- Spreadsheets: Small text on a spreadsheet in color is virtually unreadable at anything other than 4:4:4 quality.
- Corporate Branding: Accurate color representation in a company logo. Think of how some iconic brands might appear if the colors were not accurate represented.
If two video streams with identical content are placed next to each other, one at 720P 4:4:4 color and the other at 1080P 4:2:0, chances are extremely high that the average viewer will choose the lower resolution image with the true color as the more impactful. Color trumps resolution pretty much every time. So the next time you are specifying a streaming solution make sure to factor in which color space is most appropriate for the application.
Learn More about our VIEW® Pro streaming product lines and see the difference.
Why AV over IP?
Back when I first started my career in AV, signal distribution was much simpler. As we progressed in this exciting industry; along came the need of distributing signals further with much larger matrices. We then began to see the influx of UTP and Category cabling.
The AV industry thought these concepts and said, “Hey we can utilize this!” But this presented the problem of the number of pairs. Category cabling only has four pairs, which means distributing audio, video, and control at the same time becomes a challenge… four pairs just aren’t enough. In order to make things work, we needed to packetize. We needed to become digital – which, as you know is exactly what happened; and, to this day, works extremely well.
It begs the questions why haven’t we completely adopted this as an AV industry standard?
Here are a few points to think about when signal distribution is on your plate.
- Will my design need to expand in the future?
- Do I already have category cable in place?
- Will I need to control the device at the destination of the signal or the source for that matter?
- Do I have the need for a processing of my signal such as video wall modes?
All network media solutions are not the same. ClearOne’s VIEW® Pro allows you to design signal distribution systems that are completely future-proof and fully expandable. VIEW Pro gives you the ability to take any audio, video, or control signals and stream them to virtually any location. This is what you would expect; and what most manufactures offer. However, ClearOne solutions also have processing built right in that allows you to adjust virtually every single part of your signal. In addition, we also have other integrated options such as video-wall processing and composition modes.
Regardless of what your distribution needs may be, please take a moment and review ClearOne’s innovative Network Media Steaming offerings. You may just find yourself also asking why this isn’t the AV Industry standard!
We’re here to help. We’d love to hear from you and discuss your AV distribution needs.
Contact Us today and let’s chat!