What are white space devices?
What are white space devices?
A white space device (WSD) is a broadband device used to detect unused TV spectrum channels that do not have exclusive broadcast license requirements, such as ultra high frequency (UHF) (300–3000 MHz) and very high frequency (VHF) (30-300 MHz).
What does band mean on TV?
Banding, also called false contouring or posterization, refers to unrealistic solid strips of color in areas that should display a smooth transition.
What frequency is television broadcast?
The standard broadcast television channels of the United States are assigned 6 megahertz each in the following segments of the spectrum: VHF channels 2, 3, and 4, 54–72 megahertz; 5 and 6, 76–88 megahertz; 7 through 13, 174–216 megahertz; and the UHF channels, 14 through 83, 470–890 megahertz.
What is white space in computer?
Alternatively referred to as spacing or whitespace, white space is any section of a document that is unused or space around an object. White spaces help separate paragraphs of text, graphics, and other portions of a document, and helps a document look less crowded.
What is whitespace in communication?
White space, in a communications context, refers to underutilized portions of the radio frequency (RF) spectrum. Large portions of the spectrum are currently unused, in particular the frequencies allocated for analog television and those used as buffers to prevent interference between channels.
What is banding on 4k TV?
Posterization, also called solarization or color banding, is characterized by a loss of image quality on color gradients. Instead of being smooth and progressive, they appear in the form of successive patches or bands with clearly defined shades.
What is white space?
: the areas of a page without print or pictures.
What is whitespace example?
When a website flows well and guides the user down a page to a conversion point (call-to-action, form, etc), this is an excellent example of active whitespace. Active whitespace is an intentional use to create structure and flow of a page.
What is white space in cognitive radio?
The term ‘White Space’ refers to portions of licensed radio spectrum that licensees do not use all of the time or in all geographical locations. By allowing access to these White Space frequencies, more effective and efficient use of the radio spectrum is envisaged. …
What is white space in frequency?
White space refers to spectrum in specific frequency bands that is not being used by other licensed radio services in certain geographic areas, thus making it potentially available to support delivery of other services such as wireless broadband Internet.
Why does my TV have a dark band?
Dark shadows can appear on an LCD TV screen when an image has been displayed for an extended period of time. Individual pixels on the LCD screen can become temporarily fixed with a specific color. This situation is often referred to as image retention or burn-in.
What kind of device is a mode I tvbd?
A Mode I TVBD is portable device that does not have an internal geolocation capability and access to a database of channels in use. Mode I devices must get a list of available channels from a Mode II or Fixed device. A Mode II TVBD is a portable device that does have internal geo-location capabilities and can access a database of channels in use.
Which is tvbd determines which channels are available?
A Fixeddevice is a TVBD at a fixed location whose geo-graphic coordinates have been determined by an internal geo-location capability or by a professional installer. A Sensing-onlydevice is a TVBD that determines which channels are available by monitoring for activity.
What is the range of a TV band device?
TV band devicesor TVBDs are unlicensed radio frequencydevices operating in the vacant channels or white spacesbetween US television channelsin the range of 54 to 698 MHz.