WapTV

Key takeaways

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

Reference excerpt

WapTV now Miniweb was the name given to the company which originated the WTVML (Worldwide TV Mark-up Language) as a content format for the delivery of Interactive TV applications using Internet Servers. The system is an Interactive television technology platform comprising a mobile browser, a markup language, and a significant collection of associated software tools and services. The mobile browser and mark-up language are both based upon the Open Mobile Alliance WML 1.3 specification. The WTVML mobile browser is currently available only as an OpenTV application, although an MHP version of the WapTV browser has been built for demonstration and proof of concept. An emulator exists, based on Craftwork's, STBe OpenTV middleware emulation. The WTVML markup language is a heavily extended superset of the WAP Forum WML 1.3 specification. WML content originally designed for wireless delivery to mobile phone handsets will work without modification on the WTVML platform, with the exception that any WBMP images will not appear on the Sky Interactive mobile rowser. WTVML version 6.1 was published as an ETSI standard in June 2004. The mobile browser and the WTVML markup language were originally developed by Ian Valentine, Patrick Sansom Andrew Andy Hynes who founded WAPTV Ltd. The company and its technology was partly acquired by British Sky Broadcasting in 2000, and fully acquired in 2001. Platform development has continued within BSkyB, and version 7 of the mobile rowser and WTVML markup language was released in Q3 2004. The mobile rowser and WTVML markup then became the cornerstone of British Sky Broadcasting's interactive platform strategy. The platform brings internet-style content and interactivity to the Sky Digital platform by deploying a purpose-built WML mobile browser to the Sky Digital set-top-box over the satellite broadcast stream. Web site owners simply have to serve well formatted WTVML from their web servers to allow Sky set-top boxes and consumers to fully interact with their web services. In March 2007, Sky together with some of the Waptv founders "spun off" the technology into a new Company "Miniweb", with the goals of furthering the work on WTVML in a global forum, and enabling the deployment of the system in other networks and devices. One of the goals in the foundation of Miniweb Interactive was to facilitate the interoperability of Interactive TV content and Services across multiple types of TV network and devices, as it was considered that a lack of TV Centric internet standards has inhibited the ubiquitous deployment of Internet services to TVs once they become connected via Broadband. Hence the name "Miniweb" so called because the TVML technology had the capability of creating a "mini web" of TV Sites (Apps) which inter-operated across different TV middleware and chip-sets. New IPTV networks have the need for a TV Browser in their set-top boxes and various solutions exist, however as of 2007, the WTVML mobile rowser is probably the widest deployed TV Browser and has a growing community of compatible Interactive TV Sites. TV Sites for the OpenTV based mobile browsers are therefore web sites with a WTVML skin, and are often given a "wtv." sub-domain rather than a "www." sub-domain. Until the introduction of Sky HD in 2006, most Sky set-top boxes uses a standard 28.8 kbit/s modem to pull content across the online link. Because WTVML content is compiled into an encoded format by an online gateway before transmission, it must be decoded on the set-top-box before it can be drawn to the screen. For optimal performance it is recommended that WTVML files (decks) for download are no more than 70 K in size, with individual cards within each deck no more than 5 K in size. When fully loaded, the browser comprises three separate virtual layers, devoted to MPEG-4 & JPEG still image presentation, MPEG video presentation and OnScreen Display (OSD) presentation respectively. Developers can combine modes to produce very rich and diverse interactive TV interfaces. Multiple modes can be defined as a modeset. Different modes in the modeset can be referenced from the WML cards and associated with service domains, allowing the browser to change its style as the user navigates from one service to another. A modeset is a collection of one or more modes defined in a standalone XML file. A modeset is referenced at deck level from the mode attribute of the wml element. A developer can define multiple modes within a single modeset, and can initiate changes between Modes within that Modeset at card level. The mobile browser can access Broadcast Resources as well as online resources delivered from a WTVML enabled web server. Broadcast Resources are content elements that are delivered in the satellite broadcast stream. A doset can be used to specify a set of menu dos that can be easily applied to many cards and across many services. The doset is defined in an XML file that is referenced from the dosrc attribute of the modeset element. A single doset can be referenced by multiple modesets, and so can easily be applied across multiple domains and services. The names and locations of font resources for use within a service are defined by an XML document usually called fontset.xml. This document must be available from a URL, and is referred to from the fontsrc attribute of the WML.

References

External links Miniweb's corporate site Official BSkyB WapTV site Archived 2004-07-25 at the Wayback Machine

Worked examples

Example 1 — a first encounter with WapTV

Start with the simplest possible case. Write down what WapTV claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In 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 WapTV 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 WapTV 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 WapTV

In research: WapTV appears in 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 WapTV 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: WapTV is common in secondary-school and first-year university syllabi. It links to neighbouring topics 2000 mergers and acquisitions, 2001 mergers and acquisitions, Interactive television, so understanding it makes those chapters shorter.
In everyday life: Look for WapTV 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.

How to study WapTV in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what WapTV 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 WapTV out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is WapTV in simple terms?

WapTV now Miniweb was the name given to the company which originated the WTVML (Worldwide TV Mark-up Language) as a content format for the delivery of Interactive TV applications using Internet Servers. The system is an Interactive television technology platform comprising a mobile browser, a marku…

Why does WapTV matter?

Because it connects several 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 WapTV?

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 WapTV.