zhuaxia广播、宽带混合电视（HbbTV）标准介绍(jlpt官网国庆安全教育英文版)
Mr. Matthew Huntington，OpenTV公司全球副总经理。
This article provides an introduction and overview to the Hybrid Broadcast Broadband TV standard. Hybrid Broadcast Broadband TV or HbbTV is a major new initiative aimed at harmonizing the broadcast and broadband delivery of entertainment to the end consumer through connected TVs and t-top boxes. The HbbTV specification was developed by industry leaders to effectively manage the rapidly increasing amount of available content targeted at today’s end consumer.
Interactive Television
People’s view, perception, and even definition of interactive television have been changing over the last decade. What was once a source of weather and other information rvices delivered primarily as text with a few pictures via broadcast bandwidth, is now more about providing personalized video rvices over a broadband connection. Tho video rvices
may be ud to catch-up on a misd program, watch a premium movie, or indeed watch a weather report.
What makes a rvice “exotic是什么意思interactive television”unicef and more than just the Internet on TV is not only that it is accesd through the television, but also that its usage is driven by television channels and programs. Despite the growing range of options available today, the vast majority of video watched around the world, even in broadband connected homes, is still linear broadcast television. There are many reasons for this, but broadcast linear TV is still the most efficient way to deliver video to the home and still attracts large audiences.
ceo是什么The value of interactive television is to take viewers backwards and forwards between a mass audience experience and a personalized experience without having them leave the comfort of their living room.
In the UK, the BBC recently announced that 11 million people presd the red button to access their interactive rvices across digital terrestrial, satellite and cable television eac山西培训学校
h week during 2009, demonstrating a strong demand for interactive television.
The Need for Standards
Standards are important to drive the successful rollout of new rvices. They are required by rvice providers to know that their rvices will run on a wide range of devices and by consumer electronics manufacturers to ensure that a wide range of rvices will run on their devices. The consumer electronics industry today does not just need standards, it needs global standards, so that a device can have a global market, or at least a pan-continental market, to reach a required economy of scale.
sleThere have been many previous attempts to create standards for interactive television. The have largely failed as either existing technology has not been good enough to support the standard, the business model wasn’t strong enough for the rvices the standard was created for or indeed both.
In the past, interactive television standards have had to rely on slow dial-up connections
or expensive broadcast bandwidth to deliver applications and content. Services have also been restricted to the resolution of interlaced standard definition television screens and palette bad graphics. Today a new standard can be bad on high definition television, rich, true color graphics and the wide scale availability of a broadband connection.
Introducing HbbTV
Hybrid broadcast broadband television (HbbTV) is a new interactive television standard that has been created by a consortium of industry leading companies. What is unique about this consortium is it is made up of both television broadcasters and consumer electronics companies, with a common aim to create a standard that supports the rvices that the broadcasters wish to offer and matches the capabilities of the televisions that consumer electronics companies are shipping.
HbbTV does not reinvent the wheel, it is bad on elements of existing standards and web technologies including OIPF (Open IPTV Forum), CEA, DVB and W3C. The aims of
the standard are to provide the features and functionality required by broadcasters for interactive television rvices, to limit the investment required by consumer electronics manufacturers to build compliant devices and to ensure interoperability of rvices from device to device.
The core of the standard is HTML and JavaScript enhanced to support control of both broadcast TV and broadband on-demand TV. HTML bad application can be delivered with broadcast video to provide rapid access and unlimited scalability of rvices.
The adoption of HTML enables existing Internet rvices and technologies to be reud for TV rvices, it also minimizes the investment required by CE manufacturers as they can reu browr technology they are already including in their network connected TVs. It is predicted that one in five flat panel televisions in 2010 shipped in Europe will support network connectivity and an Internet browr. This number was already been achieved in Germany in the last months of 2009.husband
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