Recently, the VESA standards organization officially announced the new DisplayPort 2.0 audio and video data transmission standard specification, which is closely integrated with Thunderbolt 3 and USB-C to meet the display output requirement of 8K or higher and the first major update after the DisplayPort 1.4 protocol.
Prior to this, the theoretical total bandwidth of DP 1.1, 1.2, 1.3/1.4 was 10.8 Gbps, 21.6 Gbps, and 32.4 Gbps, respectively, but the efficiency was only 80% (8/10b encoding), which was difficult to meet the 6K, 8K resolution and High color depth and high refresh rate requirements.
It is reported that DP 2.0 will increase the theoretical bandwidth to 80Gbps, and adopt a new encoding mechanism 128/132b, which will increase the efficiency to 97%, and the actual available up to 77.4Gbps, which is equivalent to three times DP 1.3/1.4, far exceeding HDMI 2.1. The theoretical bandwidth is 48Gbps.
In this way, DP 2.0 can easily support 8K/60Hz HDR, >8K/60Hz SDR, 4K/144Hz HDR, 2×5K/60Hz output formats, not only support any 8K display, but also does not require compression, and can support up to 30. -bit color depth (more than 1 billion colors) for 8K HDR. DisplayPort 2.0 supports two 8K resolution screens at 60Hz refresh rate with full color 4:4:4 resolution and HDR-10 support.
So, what makes DisplayPort 2.0 so powerful? The answer is: Thunderbolt 3 (Thunderbolt 3), although the nominal display port itself remains, the rest of the physical layer is almost completely replaced by Thunderbolt 3. However, unlike USB 4, it was almost straightforward to change the name of the lightning. DP 2.0 went further and changed the internal mechanism.
There are four 20Gbps channels inside the Thunderbolt 3, two-way full-duplex mechanism, two channels in each direction, so the input and output bandwidth is 40Gbps, but it can work at the same time.
DP 2.0 changed to a one-way simplex mechanism for one-way transmission of larger-scale data, and the four channels were consistently external, thus achieving a total bandwidth of 80 Gbps.
As for the data line, DP 2.0 actually introduces three different mechanisms, each channel is set at 10Gbps, 13.5Gbps, 20Gbps, VESA calls it "UHBR/Ultra High Bit Rate", according to the bandwidth They are called UHBR 10, UHBR 13.5, and UHBR 20. Passive wires can only be used for very short distance transmissions, such as notebook docking stations, which require active wires when they are longer, that is, the corresponding control and amplification chips are implanted.
DP 2.0 will be the largest upgrade of this standard since its birth in 2007. The physical layer has completely turned to Thunderbolt 3, and the bandwidth and efficiency have soared. It can also be satisfied in the post 8K era.
VESA expects the first batch of DP 2.0-based retail products to be available later in 2020, and the speed is still quite fast, after all, with the mature Thunder 3 as the basis.
On the whole, the most critical factor is that Intel has opened the Thunderbolt 3 standard, which has also affected DisplayPort 2.0, and a series of high-speed interface applications. The high-bandwidth high-speed interface popularization will bring two benefits. The product form will be slimmer, such as a laptop. The second is the transfer of high-definition video to build a highway to accelerate the transformation of media formats. In addition, Xiaobian expressed optimism about the development of high-bandwidth high-speed interfaces. The powerful bandwidth provides a good external graphics solution for the future development of notebooks. In the future, there will be more affordable graphics expansion and other expansion devices. The thin and light version becomes the central component of a series of solutions, giving full play to the potential of the devices in the hands of consumers.