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102 Cards in this Set
- Front
- Back
SPDIF
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Sony/Philips Digital Interface Format (carries digital audio signals and supports DD 5.1 output *surround sound*)
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coax digital connections
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transmits an electric digital signal through a copper wire
elctrical pulses travel on the center conductor shielded from interference by an aluminum foil wrap orange is the comon color associated with this type of connector |
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coax advantage
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carries more channels
more rugged used in complex situations |
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coax disadvantage
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degrade over 50ft
not as slim more signal loss |
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optical digital connections
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transport light energy modulated by digital audio signals
connectors at either end of the digital optical cable are most commonly Toslink (Toshiba) or EIA-J rectangular connectors |
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optical advantage
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go over long distance
thinner no interference |
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optical disadvantage
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can't bend
not as rugged |
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pixel
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picture element
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what are the two most important standards when assessing a HDTV system
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aspect ratio
scan rate |
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a tv picture is comprised of pixels
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about 100,000 pixels are needed to create a good quality picture
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SPDIF
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Sony/Philips Digital Interface Format (carries digital audio signals and supports DD 5.1 output *surround sound*)
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coax digital connections
|
transmits an electric digital signal through a copper wire
elctrical pulses travel on the center conductor shielded from interference by an aluminum foil wrap orange is the comon color associated with this type of connector |
|
coax advantage
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carries more channels
more rugged used in complex situations |
|
coax disadvantage
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degrade over 50ft
not as slim more signal loss |
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optical digital connections
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transport light energy modulated by digital audio signals
connectors at either end of the digital optical cable are most commonly Toslink (Toshiba) or EIA-J rectangular connectors |
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optical advantage
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go over long distance
thinner no interference |
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optical disadvantage
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can't bend
not as rugged |
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pixel
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picture element
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what are the two most important standards when assessing a HDTV system
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aspect ratio
scan rate |
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a tv picture is comprised of pixels
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about 100,000 pixels are needed to create a good quality picture
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horizontal scan rate
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number of horizontal scans per second
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vertical scan rate
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number of times a set of horizontal lines is scanned in one second
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frame
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odd lines, even lines, two fields = one frame
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what will provide better resolution with more color info
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more horizontal lines
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which has a higher scan rate
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HDTV
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interlaced scanning
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method of displaying television pictures in which the picture is displayed in two halves
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normal standard def
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480 horizontal lines that scan across the screen in less than a blink of an eye.
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standard def produces
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60 fields or 30 frames every second. Slower refresh rate often results in some flickering of the picture, especially with larger screen sizes.
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how many field are produced for every complete frame
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2`
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what is a key benefit of interlaced scanning
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conserves bandwidth
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progressive scanning
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more appealing, encountered with dvd players, displays picture with one signal pass
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what types of tv broadcasts would be better using progressive scanning
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nascar
sports |
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flicker
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at, or above 60 instances per second
at 30 frames per second a viewer would perceive flicker |
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which type of scanning reduces flicker
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progressive
720p 1080p |
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what is 4:3 aspect ratio?
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movies were projected on a square-ish screen with an aspect ration of 4:3, which means that a screen is four units of measurement wide and 3 units tall
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4:3
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Academy ratio
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16:9
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HDTV
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Pan and Scan
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involves cropping off the sides of an image area to fit 4:3 screens, can cut up to 45% of the total picture area
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Letterboxing
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displays the widescreen pic at its full width with black bars filling the screen above and below the pic, results in the movie being displayed as intended although some viewers complain about the smaller overall pic and wasted area of the balck bars
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pillarboxing
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also know as windowpaning, opposite of letterboxing, to preserve the orginal aspect ratio of 4:3
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stretch mode
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involves stretching the j4:3 programming to fill the entire width of a 16:9 display, results in a somewhat distorted pic with people and objects looking short and fat
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smart stretch mode
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some tvs feature a smart expand mode, maintains the original apsect ratio for the center portion of the pic, stretching only the edges of the pic to fill the entire widescreen display.
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zoom mode
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alternative to the stretch mode, enlarges the entire 4:3 pic to fill the entire width of the 16:9 display
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postage stamp
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refers to an image surrounded by black bars top, bottom, and sides, standard broadcast in letterbox format is received on a widescreen tv, the override setting on a standard tv is turned off
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what types of video displays can suffer from burn in
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plasma, projection crt
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how to you avoid burn in
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avoid pillarbox and letterbox
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what types of video formats are there
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480i (sdtv), 480p (EDTV), 720p, 1080i, 1080p
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what are the main technologies to display video?
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cathode ray tube (CRT), digital light processing (DLP), liquid crystal display (LCD), liquid crystal on silicone (LCoS), Plasma
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what are the four main types of video display
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direct view, rear projection, front projection, flat panel
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who created DLP
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Texas instramment
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benefits of DLP tech
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swiveling mirrors, small, light weight, no burn in, great for HDTV
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what is the component that is the basis for DLP
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digital micro mirror display
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how is the resolution of the picture determined
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number of pixels
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the main limitation of CRT direct view is
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size, weight
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what are the 4 types of tech rptv's use for the video display
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CRT, DLP, LCD, LCoS
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front projection
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80" or larger, fptv remains the best alternative
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a fptv is a two piece system
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1. projector
2. screen |
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advantages of flat panel tv
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very thin
hang on wall |
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flat panel plasma tv
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displays are available in 32"-61" screen sizes, offer the closest pic quality to that of a crt, expensive, vunerable to burn in
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flat panel lcd tv
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displays are available in 13"-50", weighs less and uses less energy than the plasma, expensive, have a limited contrast, and black level, not susceptible to burn in
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video cable tech
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hdmi, dvi, component, s-video, composite video, coax
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when coax cable should be used
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when no better connection is available
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s-video seperates what
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luminance and chrominance signals
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component video connections
green |
y-luminance
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red
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Pr-chrominance
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blue
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Pb chrominance
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when are component cables necessary to utilize
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when using progressive scan ouput
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why are some manufacturers bypassing dvi connections
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no audio, hdmi supports video/audio input/output
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types of dvi connectors
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I - transmits either digi to digi or ana to ana signal
A - transmits high res ana to ana signals D transmits pure digi to digi signals and is used in HD home theaters |
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what does HDMI stand for
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high def multimedia interface
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HDMI uses what kind of connector
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19 pin, smaller and sleeker
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home theater system contains the following components
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receiver, set top box, dvd, hdtv, video game console, vcr
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unique customer equip
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dvd/cd changer, home media rack mounted system, gaming devices, slingbox, scalers, switchers, signal processors
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what cables typically connect gaming devices to home theater systems
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base band cables
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types of remotes
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IR, RF, universal, learning, programmable
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windows media center
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xp pro, vista premium, windows 7
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WMC supports what
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cable card, remote access, supports 4 tuners, 2 ana, 2 digi
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identify customer equipment by
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cold booting, having the customer turn on their equip verify equipment is suitable
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Position of Seating
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Position the main seating approximately two times the diagonal size of a wide screen tv away from the tv
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home theater considerations
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viewing positions, viewing distances, tv height, lightning, position the speakers
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when you install a new comcast device you must
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ensure all equipment is in a safe and stable
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when you install new connections you must
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use the correct cables and connections for each connection
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video issues, no pic
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wrong display setting fo the tv, components of the system aren't powered on, cables have been plugged into the wrong ports
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poor pic
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incompatible res, with the tv, slow refresh rate, poor signal
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audio issues
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not powered on, wrong parts, cable is missing, incorrect cables
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dBmV
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absolute measurement
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dB
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delta ratio
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ground loop issues
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HUM, (2 bars, in house, 1 bar, plant issue), poor ground, typically happens in high end homes
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product associated with home theater
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dvr, on demand, hdtv
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BCTV
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public/private
public is available to bars, restaurants, mini mart, gyms private is available to private offices, lobby environment, business viewing (conference rooms, break rooms) can't have - retail tv sales, sports stadiums/arenas, charge and admission fee |
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can a customer get a dvr with their business class tv services
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No, copyright laws
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BCTV features and services
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basic cable, standard cable, digi cable
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BCTV basic cable
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no frills, and most economical service, includes all local stations, PBS, QVC, Fox and the Weather Channel.
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BCTV standard cable
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provides business customers with up to 80 entertainment channels featuring sports, movies, dox, kids' programming and more, comcast customers can also watch all their favorite local bradcast and community access channels at no addtional cost
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BCTV digi cable
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more content and higher pic and sound quality than basic and standard cable, over 150 channels without a dish, includes an easy to use on screen program guide with parental controls, acts as a gateway enabling other exciting digi services like HDTV
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BCTV do NOT include what
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iPPV, DVR, and On Demand
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does comcast carry FM music
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NO
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BCTV service levels
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Basic, info & entertainment, digi basic plus, standard, digi standard, sports and entertainment standard, tv preferred, tv digi deluxe
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TV digi preferred and digi deluxe do not include
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encore and encore plexes, flix, movieplex, wam!, sundance, indieplex, retroplex, GolTV, NBATV, or other channels that are apart of the sports pack
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ala carte services are
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additional outlets, additional outlet install, hdtv box, music choice, sports pack, canales selecto, other international packages
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The business service customer is responsible for
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license fees covering any other uses (ASCAP, BMI, SESAC)
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communicating the value of business class tv
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flexibility, one provider, effecient, cost effective, peace of mind
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