HDBaseT

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HDBaseT
Type AV signal extension technology
Production history
Designer HDBaseT Alliance
Designed June 2010
General specifications
Length 100 metres (330 ft), including the support of multi hops (8 x 100 m)
Hot pluggable Yes
Daisy chain Yes
Audio signal Yes, up to 32 channels 24-bit 192 kHz PCM embedded in HDMI, or separate bi-directional S/PDIF
Video signal Supports video and PC video formats including
3D video
.
Cable
Cat 5e, Cat 6, or Cat 6A
Connector
8P8C
Electrical
Signal DC power up to 100 W[1]
Data
Data signal Yes, also with Fast Ethernet (100 Mbit/s) or Gigabit Ethernet
Bitrate Up to 18 Gbit/s[1]
HDBaseT connectors at a presentation and collaboration system from WolfVision

HDBaseT is a

8P8C modular connectors as used in Ethernet networks.[2][3]
HDBaseT technology is promoted and advanced by the HDBaseT Alliance.

History

The HDBaseT Alliance was incorporated on June 14, 2010 by

Sony Pictures Entertainment, LG Electronics and Valens Semiconductor as the not-for-profit organization to promote the HDBaseT standard originally created by Valens.[4] The HDBaseT 1.0 specification was also finalized in June 2010.[5]
HDBaseT initially dominated in extender products for HDMI technology before later also being embedded in AV devices such as video projectors and AV receivers.[6] Products utilizing HDBaseT technology were first demonstrated by multiple vendors at the Consumer Electronics Show as early as 2010, and by the HDBaseT Alliance in 2013.[7]

In 2013, the HDBaseT Alliance issued Specification 2.0 to enrich the HDBaseT offering to the pro-AV market and enable a multimedia home connectivity solution. Spec 2.0 maintains all the features of Spec 1.0, but also adds HDBaseT networking, switching, and control-point capabilities such as flexible and fully utilized mesh topology, distributed routing, and end-to-end error handling, enabling multipoint-to-multipoint connectivity and multi-streaming. Spec 2.0 also embeds USB 2.0 signals, enabling the zero-latency distribution of signals such as for touch-screen functionality and keyboard-video-mouse (KVM). HDBaseT 2.0 maintained category cable as the transmission medium, but also added the option for optical fiber for even greater distances and infrastructure cabling adaptability.

In 2014, the IEEE Standards Association announced that it formed a series of P1911 Working groups with the intention of adopting HDBaseT as a new standard.[8] This project ended up being abandoned with it being administratively withdrawn by 2018.[9][10]

An Internet Protocol (IP) version of HDBaseT was demonstrated in 2017.[11]

The HDBaseT Alliance released specification 3.0 in 2019, doubling the main downstream signal bandwidth to enable support for uncompressed 4K/60 4:4:4 video, and 6.5x the bandwidth on the auxiliary channel. This enables a significant increase to USB 2.0 data rate capabilities, and advancement of Ethernet support from Fast Ethernet to Gigabit Ethernet.[12]

Features

HDBaseT is complementary to digital connectivity standards such as

computer monitors, multi-touch displays, digital televisions, and digital video projectors.[13][14]

A primary differentiator with HDBaseT technology is its 5Play feature set. The five features of 5Play vary with each HDBaseT specification, but center around audiovisual (AV) media, Ethernet, USB, Control Signals, and Power-over-HDBaseT (PoH).

AV

Supports

TV and PC
video formats, including standard, enhanced, high-definition, Ultra-HD (UHD, up to 4K), and 3D video.

HDBaseT 1.0 and 2.0 can support uncompressed video up to (750 MByte/s):

  • 4K at 30 Hz with 8-bit 4:4:4 color coding,
  • 4K at 30 Hz with up to 12-bit 4:2:2 and
    high dynamic range
    (HDR),
  • 4K at 30 Hz with Dolby Vision standard mode,
  • 4K at 60 Hz with 8-bit 4:2:0 color coding.

HDBaseT 3.0 can support uncompressed video up to (1500 MByte/s):

  • 4K at 60 Hz with 8-bit 4:4:4 color coding,
  • 4K at 60 Hz with up to 12-bit 4:2:2 and
    high dynamic range
    (HDR),
  • 4K at 60 Hz with Dolby Vision standard mode.

Audio is embedded with the video in HDMI, so all standard HDMI audio formats are supported.

DTS:X
.

Near zero latency

The specification allows for negligible latency: less than 100 μs over 100 m of cable.[16] As a point of comparison, a 60 Hz refresh rate means a full image is displayed after 16.67 ms. Adding 0.1 ms is only a 0.6% increase in the signal latency.

Ethernet

HDBaseT 1.0 and 2.0 supports the 100 Mbit/s version of Ethernet over twisted pair. This can provide Internet access to devices such as smart TVs, or enable computers and other CE devices to communicate with each other and access multimedia content on the local network.[15] HDBaseT 3.0 increases this capability to 1000 Base-T (Gigabit) Ethernet.

USB

HDBaseT 2.0 introduced support for USB 2.0, with a capacity for the simultaneous connection of up to 7 USB devices and a transfer rate up to 190 Mb/s. HDBaseT 3.0 increases this to 350 Mb/s.

Control signals

HDBaseT delivers HDMI Consumer Electronics Control (CEC) protocol signals that control basic functionality such as power-on, power-off and play/stop, along with RS-232 and consumer IR (remote control) commands.[15]

Power

HDBaseT can provide a variation of Power-over-Ethernet (PoE) standard called power-over-HDBaseT (PoH). This can provision up to 100 W of operating DC power to CE devices, such as monitors and TVs. In practice, if a display (typically up to 60" in size) is enabled as a 100W powered device (PD), and is connected to a matching PoH transmitter (power sourcing equipment, PSE), the display will be able to draw its operating power through the HDBaseT link and not require a separate power connection.[15]

HDBaseT Versions

Specification 1.0

HDBaseT 1.0 utilizes 16-level Pulse Amplitude Modulation (PAM-16) encoding for downstream data at a rate of 500 MSymbols/s, achieving an aggregate data rate of 8000 MBit/s on 4 lanes. This is equivalent to the 8160 MBit/s of HDMI 1.3/1.4. The HDBaseT auxiliary channel operates with PAM-8 encoding at a rate of 12.5 MSymbols/s for an aggregate 150 MBit/s.

The 5Play feature set of HDBaseT 1.0 delivers video, audio, Ethernet, control signals, and power over a single connection. It does not support USB.

The minimum compatible cable type is Cat 5e, although Cat 6 is recommended. Termination is 8P8C modular connectors. Length potential is 100 metres (330 ft) at 1080p, and 70 metres (230 ft) at UHD 4K.

Specification 2.0

HDBaseT 2.0 maintains PAM16 encoding and an aggregate data rate of 8 Gbit/s. However, the auxiliary channel rate was doubled to 25 M symbols/sec for an aggregate 300 Mbit/s. The increased rate predominantly supports USB 2.0 and separate S/PDIF audio. Additionally, version 2.0 specifies the HDBaseT network protocol, defining the required adaptations across all layers of the OSI model, to provide the optimized services for time-sensitive applications such as high throughput video and audio.

Cabling recommendations for HDBaseT 2.0 remained the same, but the enhanced digital signal processing (DSP) and automatic repeat request (ARQ) for retransmission capabilities increase the reliability and performance to achieve up to 100 metres (330 ft) at 1080p and 90 metres (300 ft) at UHD 4K video resolutions. This can be increased to 100 m for UHD 4K by using Cat 6A cable or better.

Specification 3.0

HDBaseT 3.0 also maintains PAM16 encoding, but doubles the rate to 1000 M symbols/sec for an aggregate data rate of 16 Gb/s. This is equivalent to 18 Gb/s in HDMI transmission: the ceiling of the HDMI 2.0 specification. Furthermore, the auxiliary channel is also upgraded to PAM16 (from PAM8), and rate increased to 125 M symbols/sec for an aggregate 2 Gb/s. This extra upstream data rate capability enables Gigabit Ethernet support, and increases USB 2.0 speed to 350 Mb/s.

The 5Play feature set of HDBaseT 3.0 is carried over from HDBaseT 2.0, albeit with enhanced capabilities.

Cabling for HDBaseT 3.0 requires the use of

8P8C connectors
.

See also

References

  1. ^ a b "Technology Comparison Table" (PDF). HDBaseT.org. Archived from the original (PDF) on 2010-07-04.
  2. ^ "HDBaseT Alliance". Web site. HDBaseT.org.
  3. ^ 5Play Convergence and the Next HD Digital Connectivity Standard-White Paper Archived 2011-07-17 at the Wayback Machine. Valens Semiconductor, accessed March 23, 2010
  4. ^ "Valens HDBaseT tech carries HD video, audio and internet over Ethernet". Engadget. Archived from the original on 2012-02-28.
  5. ^ HDBaseT Alliance Announces Incorporation, Finalized Specification. Fierce Wireless, June 29, 2010
  6. ^ Interview with Micha Risling from the HDBaseT Alliance Archived 2011-07-17 at the Wayback Machine. Display Standard, March 2010
  7. ^ "HDBaseT Alliance Shows the Future of Connected Home Entertainment at CES 2013" (PDF). News release. January 9, 2013. Retrieved June 5, 2013.[permanent dead link]
  8. ^ IEEE to Adopt the HDBaseT Standard for Ultra-High-Definition Digital Connectivity, 6 January 2015, archived from the original on 1 April 2017, retrieved 31 March 2017
  9. ^ "IEEE-SA Standards Board New Standards Committee (NesCom) Recommendations 4-May-2017" (PDF). IEEE Nescom.
  10. ^ "IEEE-SA Standards Board New Standards Committee (NesCom) Recommendations 4-Dec-2018" (PDF). IEEE Nescom.
  11. ^ Valens @ ISE 2017 presenting HDBaseT over IP, Feb 16, 2017, archived from the original on 2021-12-15
  12. ^ "HDBaseT Spec 3.0: Advancing the ProAV Sector with Uncompressed 4K/60/4:4:4". HDBaseT. 2019-06-11. Retrieved 2020-12-03.
  13. ^ Valens HDBaseT tech carries HD video, audio and internet over Ethernet Archived 2010-07-04 at the Wayback Machine. HD.Engadget.com, December 15, 2009
  14. ^ Valens-HDBaseT up the ante on AV wiring Archived 2010-07-04 at the Wayback Machine. Entertainment Technology Center, January 8, 2010
  15. ^ a b c d "HDBaseT Technology: A Better HDMI Extender". CE Pro. Retrieved 2010-07-19.
  16. ^ "HDBaseT Alliance FAQ". HDBaseT Alliance. 17 June 2019. Retrieved 2021-01-24.

External links

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