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What is difference between UHD and 4K and Color Space 4:4:4,4:2:2,4:2:0

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When you choose some Video distribution products for your ProAV integration applications, you can see the product features with Video resolution is up to 8K@30 4:4:4 10bit, 4K@120Hz 4:4:4 10bit,4K60Hz 4:4:4, Well there are many similar appearance with similar functions, but difference prices range. So how to choose the right one ? So let’s first learn the basic features of video resolutions for video HDMI distribution products.

The Difference Between UHD and 4K

uhd vs 4k

Understanding the terms UHD (Ultra High Definition) and 4K is crucial for selecting the right display equipment.

  • UHD: Technically, UHD refers to a resolution of 3840 x 2160 pixels. This is the standard for consumer displays, offering four times the resolution of Full HD (1080p). UHD provides a clear and detailed picture, making it ideal for home entertainment and various professional applications.
  • 4K: Originally a term used in the cinema industry, 4K refers to a resolution of 4096 x 2160 pixels. This resolution is slightly wider than UHD and is used for digital cinema and production. Although 4K and UHD are often used interchangeably, true 4K offers a slightly higher pixel count.

In the consumer market, “4K” is commonly used to describe UHD televisions and monitors. However, understanding the distinction is important for professional environments where precise resolution specifications are necessary.

In the Market, you can see 4K60Hz is true 4K,HDMI2.0, if there shows 4K30hz, it’s HDMI1.4 version,lower resolution than 2.0 and prices more cheaper than 4K60HZ, but the Picture quality is difference with different resolutions.

What is 4:4:4, 4:2:2, and 4:2:0?

chroma subsampling 444 vs 422 vs 420

Color subsampling is a technique used to compress video data by reducing the color information in the signal. The human eye is less sensitive to color detail than to brightness detail, so subsampling can reduce file sizes without significantly affecting perceived image quality. The three most common subsampling formats are:

  • 4:4:4: This format retains full color information for every pixel. It’s used in applications where color fidelity is critical, such as professional video editing and graphics design. 4:4:4 provides the best quality but requires the most bandwidth.
  • 4:2:2: In this format, color information is sampled for every two horizontal pixels. While there is some loss of color detail, 4:2:2 still offers a good balance between quality and bandwidth. It is commonly used in professional broadcasting and high-quality video recording.
  • 4:2:0: This format samples color information for every four pixels, both horizontally and vertically. 4:2:0 is the most common format for consumer video, including DVDs, Blu-rays, and streaming services. It provides significant compression with minimal impact on perceived image quality, making it ideal for everyday use.

There are many suppliers that offer those products and similar appearance, but the PCB, Chip set, IC , Spare parts, and packages, are all different materials. As you may have heard about the solutions for Video signal transmission, there are Silicon Image, TI, ADI, Valens chipset, FPGA, H.264/265, Maxim,etc. Different solutions will lead the compatibility, stable quality and of course high cost with better stable quality, cheaper cost with unstable signal transmissions.

Our extensive experience in this field ensures that our products are designed to meet the highest standards of quality and performance. Whether you are setting up a home theater, a professional studio, or a large-scale AV installation, our expertise and dedication to excellence make us the ideal partner for your ProAV needs. Contact us now, WhatsApp 8613728685427

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