HDMI cable is one of the common cables in our daily life, it is often used to connect high-definition TV and smart set-top boxes, connect a computer with a projector or high-definition TV, connect DVD or Blu-ray players and large-screen high-definition TV... It is a good helper to change the small screen to the large screen and make the audio and video transmission between various devices simple and efficient.

So, if you want to buy a good HDMI cable, what factors should you focus on?

Note the interface version

In the purchase of HDMI cable, you will often see the description of HDMI2.0, HDMI2.1 and so on, but strictly speaking, there is no version of the HDMI cable, and the reason why it has 2.1/2.0 such a suffix, is derived from the division of HDMI interface version. At present, the main HDMI interface versions on the market are 1.4, 2.0 and 2.1, different interface versions support different transmission protocols and clarity, the higher the version, the better the audio and video effect can be achieved, and the higher version can be backward compatible with the lower version.

In terms of bandwidth and clarity, the 1.4 version is compatible with 4K 30Hz image quality, and the transmission bandwidth is 10.2Gbps; The 2.0 version has a bandwidth of 18Gbps, compatible with 4K 60Hz, 3D video and static HDR; 2.1 is the current high-specification version, bandwidth up to 48Gbps, compatible with 8K resolution, is 4 times the resolution of 4k, and can meet the 4K 120Hz screen output, but also support 3D video, dynamic/static HDR and other picture quality, so that users in the game experience more comfortable, will not appear off the frame.

Of course, the final presentation effect is also related to the performance of the connected device, if the device can only show the effect of 4K 60Hz, then the purchase of 2.1 version of the HDMI cable can not show the effect of 8k.

In addition, it is necessary to confirm the HDMI interface size of the TV and display terminal, so as not to buy the wrong HDMI cable. The interface is divided into standard HDMI interface, mini HDMI interface and mini HDMI interface, three sizes are different, and attention should be paid to the selection. micro HDMI width size is about 6 mm; The standard interface is HDMI(Type A), the width is about 15 mm; Mini HDMI, 10.5mm width.

Wire quality should not be ignored

First look at the connector of the HDMI cable, which is usually divided into two types: gold-plated and non-gold-plated. The interface with gold plating process can effectively prevent corrosion and rust, so that the interface has better electrical conductivity and high temperature resistance, extend the service life of the joint and maintain good connection performance.

What is important is the PIN in the interface, which is the main connection point, and the PIN of the high-quality HDMI connector is also gold-plated, which can ensure more reliable signal transmission and good contact performance.

The second is to look at the internal cable material, there are some similar appearance of HDMI cable may be online core material differences, some cheaper HDMI cable may use alloy or copper-clad steel and other materials, the transmission performance of these materials will not be as good as pure copper, core impedance, signal attenuation is obvious, which is also a major reason for the price difference of HDMI cable on the market.

At present, the material for making the HDMI cable inner core is copper core, which has excellent transmission rate and signal stability, and can effectively prevent signal interference. For commercial or longer distance transmission scenarios, you can consider using an HDMI cable with an internal fiber core. The HDMI cable in the fiber core uses optical transmission technology, which can provide longer transmission distance and have higher anti-interference capability. However, this type of HDMI cable usually has a relatively high price, and for the average user, choosing a copper core HDMI cable is enough to meet the demand.

The external material of the HDMI cable plays an important role in the durability and protection of the cable. Two common exterior materials are PVC and braided wire. High-quality PVC skin has the characteristics of strong toughness, high stability, flexibility and anti-aging, which can ensure that the wire is not easy to break or damage during long-term use, while effectively protecting the internal wire core from moisture, dust and mechanical scratching.

On the other hand, the outer skin made with high-strength woven mesh has excellent wear resistance and toughness, which can prevent the wire from knotting, entanglement or damage, and increase the tensile strength of the wire, making it more durable and long-lasting. Choosing an HDMI cable with a high-quality PVC sheath or a high-strength woven mesh can ensure better protection and durability of the cable in daily use.

Wire certification is more reliable

Choosing an HDMI cable that is HDMI Institute certified or Sinplay certified is an important step in ensuring good performance and reliability. This means that the cable has been professionally tested and proven to provide stable signal transmission, a high-quality image and audio experience, and is compatible with a wide range of HDMI devices.

When buying an HDMI cable, be careful to avoid buying products without brand certification. To choose a brand that is certified by consumers, reliable quality and provides effective after-sales service, if you feel that your vision is difficult to judge the advantages and disadvantages of HDMI cable, the simple way is to choose the mainstream brand HDMI cable.