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Blutooth t.v
 

Blutooth t.v

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    Blutooth t.v Blutooth t.v Document Transcript

    • BLUETOOTH TVBroadcom today said its Bluetooth radios are inside a new line of televisionsfrom LG Electronics. Earlier this year, its Bluetooth radios made it intotelevisions from Sharp, while Samsung also has a Bluetooth-enabled TV.The movement to put Bluetooth — a radio technology popular in cellphones, cars and PCs — into television is gaining momentum, and forBluetooth radio makers like Broadcom and CSR, it opens up a potentiallyvaluable, new market. Display Search, an analyst firm, expects 205.3 millionTVs will sell worldwide in 2009.Bluetooth on the TV gives consumers the ability to use their cell phones as aremote control, connect wireless headsets to the TV, and stream music froman iPod or other MP3 player to their television or speakers attached to theirTV, all without a wire. A representative for the Bluetooth Special InterestGroup expects to see more Bluetooth TVs coming to market later this yearor early next year.Bluetooth, which allows for small amounts of data to be transmittedwirelessly, is in 50 percent to 60 percent of cell phones. That could open upopportunities for companies that make both cell phones and televisions, suchas LG and Samsung, to link the devices and use mobile phones as remotecontrols. Companies like Rovi (formerly Macrovision) and NDS, whichdevelop interactive on-screen guides for televisions, are exploring how to tiemobile phones into the TV-viewing experience.A mobile phone tied to the TV would allow different users in the house toimmediately bring up personalized profiles filled with content,recommendations and perhaps other social features when they watchtelevision. Additionally, as search becomes more essential for wadingthrough the massive video-verse, using a triple-tap keystroke input like thatused for sending SMS messages would allow users to search for what theywant to watch without requiring a full keyboard.
    • Consumers with Bluetooth-enabled PC keyboards (or full QWERTYkeyboards on mobile phones) might use those to control the TV as well.Steve McIntyre, senior product line manager for wireless personal areanetworking products at Broadcom, said that Bluetooth radios are in a varietyof existing equipment, so adding the radios to TVs allows consumers to addfunctionality to their television without buying a lot of new gear. Of course,one does have to purchase a new Bluetooth-capable TV.Research firm In-Stat today released a report revealing that well over half ofrespondents in a survey owned a mobile phone with Bluetooth technology,with nearly 60 percent of them using it to connect a Bluetooth headset. Astelevisions get broadband connections, widgetsand ever morecontent, figuring out ways to navigate TV 2.0 (GigaOMPro subscriptionrequired), while optimizing the traditional entertainment offered from theTV, makes Bluetooth a compelling technology to add to these 80-plus-year-old devices. It’s a good thing Bluetooth came back from the dead.Bluetooth wireless technology is a short-range communicationstechnologyBluetooth technology is intended to replace the cables connecting portableand/or fixed devices while maintaining high levels of security.The key features of Bluetooth technology are robustness, low power, andlow cost. The Bluetooth Specification defines a uniform structure for a widerange of devices to connect and communicate with each other.
    • The structure and the global acceptance of Bluetooth technology meansany Bluetooth enabled device, almost everywhere in the world, can connectto other Bluetooth enabled devices located in proximity to one another.Connections between Bluetooth enabled electronic devices allow thesedevices to communicate wirelessly through short-range, ad hoc networksknown as piconets. Piconets are established dynamically and automaticallyasBluetooth enabled devices enter and leave radio proximity meaning thatyou can easily connect whenever and wherever its convenient for you.Bluetooth Core SpecificationUnlike other wireless standards, the Bluetooth Core Specification providesproduct developers both link layer and application layer definitions, whichsupport data and voice applications. For more information aboutthe BluetoothCore Specification, visit our Bluetooth.org membersite (member sign-in required for some sections of the site).SpectrumBluetooth technology operates in the unlicensed industrial, scientific andmedical (ISM) band at 2.4 to 2.485 GHz, using a spread spectrum, frequencyhopping, full-duplex signal at a nominal rate of 1600 hops/sec. The 2.4 GHzISM band is available and unlicensed in most countries.InterferenceBluetooth technologys adaptive frequency hopping (AFH) capability wasdesigned to reduce interference between wireless technologies sharing the2.4 GHz spectrum. AFH works within the spectrum to take advantage of theavailable frequency. This is done by the technology detecting other devicesin the spectrum and avoiding the frequencies they are using. This adaptivehopping among 79 frequencies at 1 MHz intervals gives a high degree ofinterference immunity and also allows for more efficient transmission withinthe spectrumRangeRange is application specific and although a minimum range is mandated bythe Core Specification, there is not a limit and manufacturers can tune theirimplementation to support the use case they are enabling.Range may vary depending on class of radio used in an implementation: • Class 3 radios – have a range of up to 1 meter or 3 feet • Class 2 radios – most commonly found in mobile devices – have a range of 10 meters or 33 feet
    • • Class 1 radios – used primarily in industrial use cases – have a range of 100 meters or 300 feetPowerThe most commonly used radio is Class 2 and uses 2.5 mW ofpower. Bluetooth technology is designed to have very low powerconsumption. This is reinforced in the specification by allowing radios to bepowered down when inactive.The Generic Alternate MAC/PHY in Version 3.0 HS enables the discoveryof remote AMPs for high speed devices and turns on the radio only whenneeded for data transfer giving a power optimization benefit as well asaiding in the security of the radios.Bluetooth low energy technology, optimized for devices requiring maximumbattery life instead of a high data transfer rate, consumes between 1/2 and1/100 the power of classic Bluetooth technology.