How to choose the right HDMI cable?

HDMI cables, everyone knows them, the cables to connect your devices to your TV in high quality. 

But do you know what the restrictions are?
How long can a cable be?
And what about the picture quality?
 


Hopefully, the following article can give you some clarity.
 

How to choose the right HDMI cable?

HDMI cables, everyone knows them, the cables to connect your devices to your TV in high quality. 

But do you know what the restrictions are?
How long can a cable be?
And what about the picture quality?
 


Hopefully, the following article can give you some clarity.
 

Image

HDMI arose from the need to be able to send both image and sound through one cable. With earlier cables, this was always done separately which created a tangle of cables. 

Over the years, cables got better and better because the applications also improved. Just think of 4K picture quality. 

 HDMI exists in three different forms, namely Standard, Mini and Micro. The three different cables all have the same purpose: to transmit video and audio without loss of quality. The Mini and Micro forms are more likely to be used with cameras or other compact devices. 

 

hdmi cable

What is the ideal length of an HDMI cable?

Most HDMI cables span a length of up to 3m. It is believed that 10m is a maximum length to properly bridge all data. This with a well-shielded cable of high quality. It is also important to choose a cable with a high throughput. The greater the distance is, the lower the throughput will be. This is expressed in Gbit/s. 

At IKANDA, we
always use the cables recommended by our manufacturers and will never carry out installations with uncertified cables. If you were to use lower-quality cables, you would risk 'sparkles', i.e. flashing pixels in the image.
 

What about larger distances?

If you do want to cover a greater length, you can opt for optical HDMI cables. These work with fibre optics instead of copper wire. This allows you to bridge distances of up to 100m.  

It is also possible to transmit the HDMI signal wirelessly. For this, we use a Wireless Extender. These can bridge up to 30m. Here one must bear in mind that the further the distance, the worse the signal will become. 

 

elink

There are also extenders that use HDMI over Ethernet. It uses a transmitter and receiver connected to the local network via a UTP cable. The source and the output (TV) are connected with an HDMI cable. 

hdmi extender

Impact of HDMI cable on image quality?

In early versions, HDMI cables supported image quality up to 1080p, 60Hz. The very latest cables go up to 10K, 120Hz. Hz stands for the number of times the image can refresh in one second. The higher the refresh rate, the smoother the image will be. Cables support lower and lower image qualities. So you can use a e.g. a 4Kk cable to connect a TVtv that 'only' supports 1080p. 

There are different versions of HDMI cables, e.g. they are labelled 1.4, 2.0, 2.0b or 2.1. The higher the version, the better the quality of the signal. HDMI 2.1, for example, transmits resolution up to 10K and full HDR images. Make sure the devices you use also support the correct HDMI version

 

welke-hdmi-kabel.jpg
Stijn Borloo, System Engineer, 9/01/2023

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