Glossary of Digital Broadcast. Analog A type of waveform signal that contains information such as...
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Glossary of Digital Broadcast
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AnalogA type of waveform signal that
contains information such as image, voice, and data. Analog signals have unpredictable height (amplitude) and width (frequency) and can vary infinitely over a given range.
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HDTV- 720pType of high-definition television (HDTV) image that is 720 vertical lines by 1,280 horizontal pixels wide, displayed in progressive format. (It has a 16:9 aspect ratio, 59.94 Hz, 29.97 Hz, and 23.98 Hz frame rates, as defined by the ATSC standard.)
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HDTV-1080pType of high-definition television (HDTV) image that is 1,080 vertical lines by 1,920 horizontal pixels wide, displayed in an interlaced format. (It has a 16:9 aspect ratio, 29.97 Hz frame rate, as defined by the Advanced Television Systems Committee (ATSC) standard.)
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BandwidthA measure of the capacity of a circuit or channel -- the amount of information transferred between points within a specified time period.
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BroadbandTerm that generally refers to high-bandwith capacity. Broadband has a multi-channel capacity that is greater than or equal to 45 Mbps (US standard) or 34 Mbps (European/international standard).
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DatacastingThis the term for the propagation of information from one source to another source.
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DemodulationA method for extracting digital information stored in a specific pattern on a radio frequency (RF) signal.
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Digital set-top-box (DSTB)
A device that receives and decodes digital video broadcasts for consumer viewing.
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Digital television (DTV)
A device that receives, decodes, and displays digital video broadcasts (in both high-definition and standard-definition formats) for consumer viewing.
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High-definition television (HDTV)
High-definition video formats that have 16:9 aspect ratio. Generally refers to1080i or 720p images
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Interactive television
A capability in DTV or DSTB that allows a user to control the action of the television and view the results of his/her action on the television.
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ModulationA technique for embedding digital information in a radio carrier wave for Corporation developed and licenses the technology.
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MulticastingGenerally, multicasting refers to propagation from one source to only a subset of potential destinations. It also means a technique for simultaneously sending multiple DTV programmes on a single channel. The frequency used to carry a single analog television program can be used to carry up to six digital programmes.
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Phase-alternating line (PAL)
The analog color video composite system developed in Europe and used by countries around the world. It is similar to the NTSC standard, but it uses a sub-carrier phase alternation technique that makes certain kinds of transmission errors appear to cancel.
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PixelThe smallest unit of colour in a display. Frames are made up of lines and columns of pixels. The number of pixel lines in each frame expresses video resolution.
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Plasma display panel (PDP)
Flat panel display using plasma electronic technology.
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Pay-per-view (PPV)
A technique of controlling television access whereby the customer is charged on the basis of what programmes he/she watches.
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Radio frequency (RF)
Refers to the use of radio carrier waves to transmit a broadcast signal.
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Terrestrial television
Television signals broadcast from local radio towers. Homes with antennas capable of picking up the broadcast signals are able to receive the television programme
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Universal Serial Bus (USB)
A digital connection between two separate electronic devices which provides "plug-and-play" capability.
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Video on demand (VOD)
The viewer pays a small fee to the television service provider in order to watch particular movies listed on the on-screen television menu. Similar to pay-per-view.
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MPEG-2A digital video and audio compression (encoding) technique defined by the Moving Pictures Expert Group (MPEG).
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Enhanced television
Any of several techniques for providing a viewer with additional information associated with a television programme or advertisement.