computer science

WirelessHD

WirelessHD is a computer science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand WirelessHD rather than just read about it. In short: WirelessHD, also known as UltraGig, is a proprietary standard owned by Silicon Image (originally SiBeam) for wireless transmission of high-definition video content for consumer electronics products. The consortium currently has over 40 adopters; key members behind the specification include Broadcom, Intel, LG, Panasonic, NEC, Samsung, SiBEAM, Sony, Philips and Toshiba.

Key takeaways

WirelessHD belongs to computer science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect WirelessHD to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of WirelessHD from memory before moving on to harder problems.

Reference excerpt

WirelessHD, also known as UltraGig, is a proprietary standard owned by Silicon Image (originally SiBeam) for wireless transmission of high-definition video content for consumer electronics products. The consortium currently has over 40 adopters; key members behind the specification include Broadcom, Intel, LG, Panasonic, NEC, Samsung, SiBEAM, Sony, Philips and Toshiba. The founders intend the technology to be used for Consumer Electronic devices, PCs, and portable devices. The specification was finalized in January 2008.

Technology The WirelessHD specification is based on a 7 GHz channel in the 60 GHz Extremely High Frequency radio band. It allows either lightly compressed (proprietary wireless link-aware codec) or uncompressed digital transmission of high-definition video and audio and data signals, essentially making it equivalent of a wireless HDMI. First-generation implementation achieves data rates from 4 Gbit/s, but the core technology allows theoretical data rates as high as 25 Gbit/s (compared to 10.2 Gbit/s for HDMI 1.3 and 21.6 Gbit/s for DisplayPort 1.2), permitting WirelessHD to scale to higher resolutions, color depth, and range. The 1.1 version of the specification increases the maximum data rate to 28 Gbit/s, supports common 3D formats, 4K resolution, WPAN data, low-power mode for portable devices, and HDCP 2.0 content protection. The 60 GHz band usually requires line of sight between transmitter and receiver, and the WirelessHD specification ameliorates this limitation through the use of beam forming at the receiver and transmitter antennas to increase the signal's effective radiated power, find the best path, and utilise wall reflections. The goal range for the first products will be in-room, point-to-point, non line-of-sight (NLOS) at up to 10 meters. The atmospheric absorption of 60 GHz energy by oxygen molecules limits undesired propagation over long distances and helps control intersystem interference and long distance reception, which is a concern to video copyright owners. The WirelessHD specification has provisions for content encryption via Digital Transmission Content Protection (DTCP) as well as provisions for network management. A standard remote control allows users to control the WirelessHD devices and choose which device will act as the source for the display.

Competition WirelessHD competes with WiGig in some applications. WiGig transmits in the same 60 GHz band used by WirelessHD.

See also Extremely high frequency IEEE 802.15 UWB Wireless HDMI: Intel Wireless Display (WiDi) version 3.5 to 6.0 supports Miracast; discontinued Miracast WiGig Wireless Home Digital Interface Wi-Fi Direct ip based:

Chromecast (proprietary media broadcast over ip: Google Cast for audio or audiovisual playback) AirPlay (proprietary ip based) Digital Living Network Alliance (DLNA) (ip based) port / cable standards for mobile equipment:

Mobile High-Definition Link - MHL SlimPort (Mobility DisplayPort), also known as MyDP

References

External links Official website Civil mm-wave Regulation in US The Main Wireless HDMI Transmission Protocols and Their Typical Products Archived 2017-12-14 at the Wayback Machine

Worked examples

Example 1 — a first encounter with WirelessHD

Start with the simplest possible case. Write down what WirelessHD claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In computer science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to WirelessHD before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about WirelessHD ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of WirelessHD

In research: WirelessHD appears in computer science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses WirelessHD in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: WirelessHD is common in secondary-school and first-year university syllabi. It links to neighbouring topics Networking standards, Telecommunications-related introductions in 2008, Wireless display technologies, so understanding it makes those chapters shorter.
In everyday life: Look for WirelessHD outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study WirelessHD in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what WirelessHD means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain WirelessHD out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is WirelessHD in simple terms?

Why does WirelessHD matter?

Because it connects several computer science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study WirelessHD?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on WirelessHD.