The Difference Between HDMI and DP Audio Connection Products

June 24,2022

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DP and HDMI are currently the most commonly used audio and video connection products. The functions of the two overlap in the same field. Specifically, we can start with the details, starting with HDMI.

 

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A brief introduction to HDMI

 

High DefiniTIon MulTImedia Interface is a fully digital interface used in both the consumer electronics field and the PC field. It can transmit uncompressed audio signals and video signals. Since the audio and video signals are transmitted by the same cable, the number of interface cables is greatly simplified, and it has been popularized in home appliances and PCs.

 

Advantages of HDMI

 

✔️Wide application

 

Many of the common TVs and electronic digital devices on the market are supporters of the HDMI interface.

 

✔️Provide HD

 

Transmitting digital audio signals, the interface loses very little during analog conversion, especially in high resolution, the difference is more obvious.

 

✔️Easier to use

 

HDMI integrates video and multi-channel audio in a single cable, eliminating the complexity and confusion of multiple cables used in A/V systems.

 

✔️Smarter

 

Supports two-way communication between the video source and DTV, such as auto-configuration and one-click playback, to automatically transfer the most efficient format.

 

What are the advantages of HDMI products?

 

✔️High-speed HDMI cable with Ethernet function

 

Supports HDMI Ethernet Channel, Audio Front Panel,desktop front audio panel,pc panel audio controller, 3D signal over HDMI, 4K video and other color spaces.

 

✔️Waterproof HDMI cable

 

A threaded coupling that ensures water and dust protection is used. Gold-plated contacts provide reliable connection and re-mating. Rugged molded backshell adds durability.

 

A brief introduction to DP

 

The DP interface adds support for high-definition audio signal transmission while transmitting video signals, and supports higher resolution and refresh rate. It supports single-channel, one-way, four-line connections, sufficient to transmit uncompressed video and associated audio, as well as a 1Mbps two-way auxiliary channel for device control, as well as 8-bit and 10-bit color.

 

What are the advantages of DP products?

 

✔️DisplayPort cable, thin male/slim male

 

The short back profile allows these cables to fit into tight spaces without compromising performance. A maximum length of 3 meters is supported.

 

✔️Mini-DisplayPort male/Mini-DisplayPort male cable assembly

 

Support HDCP (High Definition Content Protection) function. Color depths of 6, 8, 10, 12 and 16 bits/component are supported.

 

Difference between DP and HDMI

 

✔️Bandwidth

 

The DP 1.0 version has been as high as 10.8Gbps, while the first generation of HDMI is only 4.95Gbps. In theory, the higher the video playback bandwidth, the greater the amount of data transmitted. At present, the DP2.0 video bandwidth reaches 77.37Gbps, which can achieve 16K 60Hz or two. 8K 120Hz video output, supports HDR-10, and has better support for AR/VR. Relatively speaking, the current HMDI 2.1 only supports up to 8K 60Hz.

 

✔️Integration

 

Like HDMI, DP also allows video and audio signals to share a cable, but slightly more advanced than HDMI, DisplayPort also provides a powerful auxiliary channel in addition to the four main transmission channels. The transmission bandwidth of this channel is 1Mbps, and the maximum delay is only 500μs. It can be directly used as a transmission channel for low-bandwidth data such as voice and video, and can also be used for game control without delay.

 

✔️Compatible

 

HDMI needs to be converted to TMDS signal through TMDS circuit. DP digital signal can be output directly. Moreover, DP simplifies the internal design of the LCD and realizes the integration with the panel. All signals can be input to the video processor of the motherboard with only one connection line. The difficulty of the motherboard design is reduced, and the cost is greatly reduced.

 

✔️Length

 

Due to changes in the usage environment, cable length is also an important consideration. The longer the cable, the more serious the loss and delay of video and audio information. The DP cable is not ideal in this regard, its maximum length is about 3m, but it is recommended that the length of the DP cable should not exceed 1.8m, otherwise the display quality will be greatly reduced. The length advantage of HDMI is great, and it supports up to 15m.

 

✔️Safety

 

As digital rights become more and more important, security also becomes more important. DP does not use the HDCP digital copyright protection protocol like the HDMI port, but has developed a set of content copy protection protocol AES technology, which provides a key length of up to 2048 bits, and the protection technology is more reliable than HDMI.

 

✔️Popularization

 

No matter how many benefits, it depends on market feedback. At present, it is obvious that HDMI is more popular than DP. Of course, many graphics card devices already have many DP interfaces.

 

So in general, each has its own advantages. At present, HDMI has the greater advantage in popularity, but as the Type-C interface becomes more and more popular, the future development of the two is more worth looking forward to.

 

To sum up

 

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