glossary of digital broadcast

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Glossary of Digital Broadcast

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Glossary of Digital Broadcast. Analog. A 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. HDTV- 720p. - PowerPoint PPT Presentation

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  • Glossary of Digital Broadcast

  • 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.

  • 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.)

  • 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.)

  • BandwidthA measure of the capacity of a circuit or channel -- the amount of information transferred between points within a specified time period.

  • 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).

  • DatacastingThis the term for the propagation of information from one source to another source.

  • DemodulationA method for extracting digital information stored in a specific pattern on a radio frequency (RF) signal.

  • Digital set-top-box (DSTB)A device that receives and decodes digital video broadcasts for consumer viewing.

  • Digital television (DTV)A device that receives, decodes, and displays digital video broadcasts (in both high-definition and standard-definition formats) for consumer viewing.

  • High-definition television (HDTV)High-definition video formats that have 16:9 aspect ratio. Generally refers to1080ior720pimages

  • Interactive televisionA 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.

  • ModulationA technique for embedding digital information in a radio carrier wave for Corporation developed and licenses the technology.

  • 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.

  • 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.

  • 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.

  • Plasma display panel (PDP)Flat panel display using plasma electronic technology.

  • Pay-per-view (PPV)A technique of controlling television access whereby the customer is charged on the basis of what programmes he/she watches.

  • Radio frequency (RF)Refers to the use of radio carrier waves to transmit a broadcast signal.

  • Terrestrial televisionTelevision signals broadcast from local radio towers. Homes with antennas capable of picking up the broadcast signals are able to receive the television programme

  • Universal Serial Bus (USB)A digital connection between two separate electronic devices which provides "plug-and-play" capability.

  • 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.

  • MPEG-2A digital video and audio compression (encoding) technique defined by the Moving Pictures Expert Group (MPEG).

  • Enhanced televisionAny of several techniques for providing a viewer with additional information associated with a television programme or advertisement.