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DisplayPort does true 4K video….plus other stuff….

datePosted on 12:16, January 19th, 2010 by Many Ayromlou

Well, it’s taken a bit of time, but I think with the announcement of DP1.2 specs last December, the specs (and hopefully soon the vendors) are ready for True Digital Cinema home implementation. The DisplayPort connector supports 1, 2, or 4 data pairs in a main link that also carries clock and optional audio signals, each with a symbol rate of 1.62, 2.7, or 5.4 Gbit/s. The video signal path supports 6 to 16 bits per color channel. This allows the updated DisplayPort 1.2 specification to drive 4K x 2K display (3840×2160) with 30 bits per pixel and 3D over a single 2m cable.

DP 1.2 supports a maximum of 5.4Gbps per lane, with 4 lanes providing a whopping 21.6Gbps throughput, more than enough for 10-bit 4xHD resolution (3840×2160). To achieve the 21.6 Gbps rate, the per-lane data rate is doubled from 2.7 Gbps to 5.4 Gbps max, over the four lanes that exist in the standard cable. For a single display, this enables up to 3840 x 2400 maximum resolution at 60Hz, or a 3D display (120Hz) at 2560 x 1600.

Display Port 1.2’s massive data rate will enable Multiple-Streaming, support for stereoscopic images beyond full HD, a high-speed data channel, and support for mini connectors.

Multi-Streaming — is the ability to transport multiple independent uncompressed display and audio streams over a single cable. This enables the use of multiple monitors connected by cable in a daisy chain or hub configuration. Whereas the current Display v1.1a standard can support one 2560 x 1600 monitor at 60Hz, DisplayPort v1.2 can support two such monitors with one port, or four 1920 x 1200 monitors.

Another new feature is the ability to support high-speed, bi-directional data transfer, allowing USB 2.0 or Ethernet data to be carried within a standard DisplayPort cable. For DisplayPort v1.2, the maximum data rate of this “AUX” channel has been increased from 1 Mbps (Mega-bit-per-second) to 720 Mbps, providing suitable bandwidth for USB 2.0. The DisplayPort cable can therefore support USB data to/from the display to support Display USB functions, in addition to sending the video and audio information. Standard Ethernet can also be transported in the DisplayPort cable.

On the audio front DisplayPort v1.2 adds the following new enhancements:

  • Audio Copy Protection and category codes
  • High definition audio formats such as Dolby MAT, DTS HD, all Blu-Ray formats, and the DRA standard from China
  • Synchronization assist between audio and video, multiple audio channels, and multiple audio sink devices using Global Time Code (GTC)

DisplayPort v1.2 also includes improved support for Full HD 3D Stereoscopic displays:

  • Life-like motion using up to 240 frames-per-second in full HD, providing 120 frames-per-second for each eye
  • 3D Stereo transmission format support 
    • Field sequential
    • Side by side
    • Pixel interleaved
    • Dual interface
    • Stacked
  • 3D Stereo display capability declaration
    • Mono
    • Stereo
    • 3D Glasses

The only thing on my wish-list that they (VESA) omitted is support for true 4K DCinema (4096×2048) resolution. But I guess you can’t have everything……and there is always DP1.3 :-).

Samsung: First LCD display to use DisplayPort Interface

datePosted on 12:45, July 25th, 2007 by Many Ayromlou

So we’ve been waiting for this for a while now. In Digital Cinema applications display technology throughput has always been a problem. Pumping ~10Gb/s of data to a screen is an issue, be it a projector and/or monitor. There have been a number of “hacks” to get these types of setups working (Dual or Quad DVI/HDMI ports). The problem usually is the seam. It is very hard to sync four DVI output chips properly and even harder to display the pixel information back on the screen (inside the projector/monitor).

DisplayPort technology is one attempt to solve this problem:

The DisplayPort connector supports 1 to 4 data pairs in a Main Link that also carries audio and clock signals, each with a transfer rate of 1.62 or 2.7 gigabits per second (Gbit/s). The Video signal path supports 6 to 16 bit per color channel. A bi-directional auxiliary channel runs at a constant 1 megabit per second, and serves as Main Link management and device control using VESA EDID and VESA MCCS standards.”

As you can see from the Wikipedia Quote above, DisplayPort (in it’s quad configuration) can support upto 10.8 Gb/s of information….perfect for DCinema Applications. Samsung has just released a Press Release outlining their 30′ LCD monitor that uses DisplayPort technology:

“Seoul, Korea – July 25, 2007: Samsung Electronics Co., Ltd., the world’s largest provider of thin-film transistor liquid crystal display (TFT-LCD) panels, announced today that it has developed the world’s first LCD panel using the next-generation video interface – “DisplayPort.” Sanctioned by VESA (the Video Electronics Standards Association), DisplayPort will serve as a replacement for DVI, LVDS and eventually VGA.

For Samsung’s new 30-inch LCD, the DisplayPort interface transmits graphics data at a total data rate of 10.8Gbps. This speed enables 2560×1600 resolution without any color smear. By using a transmission speed more than double that of today’s interfaces, Samsung’s new LCD only requires a single DisplayPort interface, instead of the two DVI (Digital Visual Interface) ports now used.

In a joint undertaking with Genesis Microchip Inc. (Santa Clara, California), Samsung developed its 30” panel using a new four-lane, 2.7Gbps/lane interface chip. The interface technology processes 2560×1600 pixels of graphics data at up to 10 bits of color depth or 1.07 billion colors, a feat that would normally require at least three DVI or four LVDS interface chips.

“We are pleased to be the first LCD manufacturer in the world to create a panel with a DisplayPort interface,” said Brian Berkeley, vice president, Samsung LCD Business, who is leading the company’s DisplayPort development efforts. “We have received many inquiries from computer integrators interested in DisplayPort-based LCD panels, which prompted an acceleration of our R&D for this first DisplayPort LCD panel.” Samsung was the only LCD panel maker participating in the original DisplayPort working (standards) group formed in 2004.

Samsung’s new 30” LCD also offers the company’s proprietary Super Patterned Vertical Alignment (S-PVA) liquid crystal technology for 180° viewing angle, and 300nits brightness.

Mass production of the 30-inch panel is scheduled to begin in the second quarter of 2008.

Specifications:
Display size 30”
Resolution WQXGA (2,560 x 1,600 pixels)
Response time 6ms
Viewing angle 180°/180°
Contrast ratio 1000:1
Mode S-PVA
Brightness 300 nits
Colors 16,777,000
Color saturation 100%
Interface DisplayPort

It’s just too bad that we can’t buy this NOW :-)