CES 2019 played the prelude to the era of 8K UHD TV last year. Sony, Samsung, LG, TCL and other brands raised the resolution of their commercially available flagship TVs to 8K. Furthermore, all new high-end models would support HDMI 2.1 interface.
HDMI stands for HD multimedia interface. It is a wire that transmits video data from a signal source to some audio equipments. Physically, the wire has remained unchanged since its invention, maintaining its unique gold-plated connector. However, with the development and expansion of TV technology, the HDMI specification has undergone several updates since 2003.
The most common HDMI specification is HDMI 2.0 now, which includes metadata for HDR and HLG, as well as lossless audio codecs.
What performance does HDMI 2.1 improve?
a.Higher transmission rate
For most people, the performance of the HDMI 2.0 standard is already quite powerful. With a bandwidth of 18Gbps, it supports 4K@60Hz video and even transmits 8K video at 24 or 30 frames. On the top of that, the performance of HDMI 2.1 has been improved several times. In the meanwhile, the bandwidth has been increased to 48 Gpbs, allowing more information to be transmitted.
b.Higher video resolution and faster refresh rate
The new HDMI 2.1 standard supports 8K@60Hz and 4K@120hz. 4K includes 4096×2160 pixels and 3840×2160 pixels of true 4K, which brings better experiences to users. The resolution of up to 10K can reach commercial level.
For video and games, HDMI 2.1 utilizes multiple technologies to enhance the refresh rate to ensure the fluency. Such as:
- Variable Refresh Rate (VRR): It can reduce or even eliminate screen delays and stalls, ensuring decent video game playing experience.
- Quick Media Switching (QMS): Mainly for movies and videos, it can eliminate the black screen delay when content processing changes.
- Quick Frame Transfer (QFT): Allows the faster frame transmission rate from the source to the device. Real-time interact VR is possible, eliminating lagging and screen tearing.
- Automatic low-latency mode (ALLM): Allows to set a optimal delay for a smooth, non-jamming, and uninterrupted viewing and interaction experience.
- For game users, the HDMI 2.1 UHD cable has a high refresh rate of 120hz. With the high-speed bandwidth upgrades to 48Gbps, it eliminates the game’s picture delay, rejects flash screen noise, and smooths color transition performance plus a wider field of vision. Furthermore, the fidelity is close to the ideal state. Therefore, it can reach the smoothest gaming experience.
c.Added dynamic HDR
HDR stands for High Dynamic Range, a technique that enhances the contrast between the brightest white and the darkest black. It’s the reason why it can create an image with a wider color palette and more varying tones.
Several variants of HDR can be divided into two different styles: static and dynamic. The former sets the contrast value of the entire film, while the latter can be set scene by scene or even frame by frame.
Dynamic HDR ensures that every scene of a video shows the ideal value of depth of field, detail, brightness, and contrast, and a wider color gamut.
d.Enhanced Audio Return Channel (eARC)
Let the TV transmit high-bit-rate Dolby Atmos Dolby Atmos, DTS:X and other 3D surround sound audio directly to the A/V amplifier receiver or echo wall and other equipment through the HDMI cable. Home theater products can wirelessly connect to HDMI and AVR, enhancing ease of use. And it can also support the most advanced audio formats and the highest audio quality.
The embarrassment of 8k TV-the bottleneck of HDMI interface
We all know that the format of a standard 4k TV digital signal interface is also very important. The traditional 1080p Full HD TV uses the HDMI 1.4 standard digital interface, and its data throughput is relatively poor. After entering the era of 4k TV, all the 4k TVs of the whole system need to be equipped with the digital signal interface of HDMI 2.0 standard.
Facing the huge data throughput requirements of 8k, the current mainstream HDMI 2.0 technology was unable to meet the needs of 8k. So the first-generation Sharp 8k TV adopting the four-channel hm2.0 design before completing 8k video input. This kind of design can be a little embarrassing. After releasing the HDMI 2.1 standard at the end of last year, Changhong, Hisense, Skyworth and other brands have released their own 8k TVs .
When 8k TVs in the entire market all meet the 8k screen resolution, 8k video processing chip, 8k digital interface, and 8k content providing platform, it is the smarter choice to consider 8k TV.
Do you need HDMI 2.1 UHD cable?
HDMI 2.1 shows you higher definition and comfort, so you can achieve clear and smooth pictures and reject low-quality pictures. Greatly enhance our sensory experience in leisure and entertainment. With the HDMI2.1 interface, any content can provide 8K-level picture quality enjoyment. It will usher in a new opportunity regardless of the hardware industry or the content industry.
The use of HDMI2.1 interface will usher in brand-new changes in many fields, even in scientific imaging systems, sports live broadcast systems and so on. In the future, pictures and videos will become clearer.
5 options, tell you how to choose a premium HDMI cable
In the case that HDMI 2.1 is not popular, we must choose high-quality HDMI cables to improve the quality of video playback and the speed of signal transmission.
- Choose a HDMI cable with a gold-plated connector andpin
The gold-plated joint is slightly better than the non-gold-plated. The gold-plated joint has strong corrosion resistance, good electrical conductivity, easy welding, high temperature resistance, a certain wear resistance, and is also beautiful. Therefore, many HDMI connectors are coated with a thin layer of gold. It is not the HDMI connector that is gold-plated will definitely bring high-definition picture quality. The final contact with the HDMI interface of the device is the pin in the HDMI cable connector, so the conductivity and wear resistance of the PIN pin are very important.
- Choose a HDMI cable with a larger diameter
In general, the larger the diameter of the HDMI cable, the larger the cross-sectional area of the conductor, and the greater the current that can be transmitted. Eventually, the transmission performance of the HDMI cable is good and stable.
- Choose a HDMI cable with high softness
We found that many inferior HDMI cables is very soft, and when you bend it , the white crease will appear. If the core wire material is not Pure copper, so the core wire may be broken if it is bent a few times. Therefore, the flexibility and bendability of the HDMI cable can reflect whether the HDMI cable’s external materials meet the standard and the core wire is pure copper.
- Choose a HDMI cable with magnetic ring
In the weak current cable, we can often see the plastic cylinder on the cable, which calls magnetic ring. The role of the magnetic ring in the signal transmission is to filter out high-frequency and low-frequency interference currents, so as to protect the equipment and purify the signal.