[白話文系列] A brief introduction to the audio and video transmission interface


1.VGA 2.DVI 3.HDMI 4.DisplayPort 



  First, briefly describe the characteristics of each interface. 





 1.VGA

VGA uses analog signals, but because computer outputs are digital signals, data is often lost during the conversion process. The VGA cable only transmits a video signal, so people usually use VGA to connect old computer screens and projectors. 



 2.DVI 



 DVI DVI uses a digital signal, because it is the same as a computer signal, so there will be no transmission problem, but it can only transmit video signals like VGA. 




Simply put, none of the above two are as practical as HDMI~


3.HDMI


 

 

(source:Amazon)
 

HDMI is now the most popular and widely used specification. Almost all audio-visual equipment in the home uses HDMI cables. The most common versions are HDMI1.4 and HDMI2.0. The main difference between HDMI1.4 and HDMI2.0 is the resolution and screen update rate they can support.

 A simple way to distinguish between HDMI1.4 and HDMI2.0: Generally, most devices are HDMI1.4, and HDMI2.0 is a higher specification.




So the general device is usually 1.4!


HDMI2.0 is only required for high-definition TV screens or high-end screens~


 The following table is the data corresponding to each version of HDMI for your reference.



 

(source:痞客邦)

Tips: The length of the DVI cable cannot exceed 8 meters, otherwise it will affect the picture quality, and HDMI can transmit up to 15 meters. 
 
 
4.DisplayPort

DisplayPort DisplayPort (DP) is another specification for high-definition video and audio transmission.DP

 Is DP different from HDMI?
In fact, the two are not very different HDMI(but in essence, they are completely different)  
 Like HDMI, DP also has different versions, which can also transmit high-definition video signal and audio. For manufacturers, DP does not require licensing fees like HDMI, so DP is very competitive in the long run.






After briefly introducing the differences between the interfaces, we should talk about which device is suitable for which interface. This kind of thing should be matched with your own use situation.

We first refer to the year of the device, and then make the final judgment based on the input and output.



If your device is before 2009, the VGA interface is definitely the most common!

For example, old projectors and screens, most of them use VGA!
!


What if the new computer only supports HDMI but the screen is VGA?


 Usually in this case, you need to buy an adapter or buy an HDMI to VGA cable,

(source:Pchome)

which can still work, but because the signal is prone to data loss after conversion, do not expect the screen to have the original picture quality performance. 


 As for the game console to connect to the VGA screen, what should I do?

For this, you need to find a dedicated adapter set, and it must be the one with a chip, because the signal needs to be converted during the process, so the purchased adapter should also be confirmed to be able to play games~


 Remind everyone again.
 There will be no audio after converting to VGA!
 Therefore, devices that use VGA must use an audio cable to connect to the speaker.

Conclusion: It's time to upgrade!!!

Why is it necessary to upgrade? Because the future audio and video content will be improved with changes in specifications. And now it's almost time for VGA to be eliminated.




 Next, I will talk about the market conditions of DVI and HDMI1.4 and HDMI2.0 in the last 3-5 years.

 Although DVI also uses digital signals, it has not been used as widely as HDMI because it has no audio transmission.


Conclusion: HDMI is still the most convenient~

 

As for the choice between HDMI1.4 or HDMI2.0 version, it can be decided according to whether there is a requirement for 4K image quality.


Before the end, let's compare the latest two interfaces, HDMI and DP.

 In fact, both interfaces can be used for middle and high-end users, because in order to avoid incompatibility with new screens or graphics cards, these two interfaces are usually applicable.
 


 

But it's different for e-sports players!!
To put it briefly, the needs of players for the screen are nothing more than picture quality (4K/8K) and FPS (60Hz/120Hz/144Hz) 

For gamers, FPS (frames per second) is especially important!


So if you want a good FPS, an interface that can transmit a large amount of data in a short time is very important.


 DP1.4's 32Gbps has a higher transmission speed than HDMI2.0's 18Gbps. Obviously, DP1.4 can provide higher picture quality or FPS.  

In addition, if you are using multiple screens, DP1.4 is more suitable for you than HDMI2.0. 

 

(source:Kristyn Leigh)


What if you want to play high-frame-rate and high-definition games on the TV?
？  

 

(source:samsung)

In this case, you can choose HDMI2.1 version. Due to the large screen of the TV, it is recommended to use a higher resolution to make the screen more detailed, but such a large resolution requires a high update rate.

Going back to the transmission speed mentioned above, the HDMI 2.1 version has been upgraded to 48Gbps and can support up to 10K resolution/120Hz update rate.

 

Conclusion:
HDMI 2.0 is the most versatile.
DP is suitable for high-end gaming players.
HDMI2.1 is currently the most extreme.

 


 The above interfaces will be updated continuously with future development. For example, DP2.0 has a transmission speed of 80Gbps, but it depends on whether there is a demand for it or not.

 
Find a suitable interface according to your own needs, and it will not cost unnecessary money.


 You may have another question?
Keep updating like this...how do I know when there is a new choice?

My suggestion is that you change it as soon as a new one comes out (just kidding).


 

The real suggestion is to follow the NinjaDrive blog at any time, and we will bring you the latest information from time to time.

If you want to know more about other information.
You can refer to other articles on the NinjaDrive blog.

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