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FAQ's

Frequently Asked Questions

What are some considerations for my new home?

What is a Structured Wiring System and why is it important for my home?

Home Automation- How does it make my home more intuitive and comfortable?

What is High Definition Television and is it available today?

Can I incorporate your services into my existing home?

What are the different Surround Sound formats (Dolby Digital, DTS, THX, etc.)?

What are the different TV screen types (Plasma, CRT, LCD, Rear Projection) and which is better?

What is the CableCARD feature found on some newer Televisons?

 

 

What are some considerations for my new home?

Building Considerations

If you are building a home, you probably want to plan it for home electronics, now and in the future. Here are some simple things to consider:

bulletWill you want music around the house?  If so, will you want room-to-room control of your music system?
bulletWill you have one or more computers and will they need to be networked?
bulletWill you have high-speed internet access?
bulletWill you have TV via antenna, cable, satellite or all of these?
bulletWill there be adequate telephone jacks?
bulletWill there be a home theater (surround sound)?
bulletIs answering your doorbell from any telephone a consideration?
bulletWill you want camera surveillance of your property?
bulletWould you prefer one set of controls for lighting, temperature, music, video, etc?

Lots of decisions to be made. However, these decisions are typically not high on the priority list of a new home owner during the early stages of building a home. Thinking about the modern conveniences of home electronics is sometimes put off until it is too late or, at the very least, much more costly. If you examine a few of your preferences before the drywall goes up, your electronic “after life” can be a lot more fulfilling.

The Possibilities

Most people’s thoughts on home electronics are limited by their knowledge of what is possible. Here are a few thought-provoking possibilities:

bulletListen to different music sources in every room of your home
bulletAnswer the door from the any telephone
bulletHome Theater Projector and 100" Screen able to retract into your ceiling and become invisible
bulletKeep an eye on the house from a remote location such as work
bulletWatch the morning news THROUGH your bathroom mirror (see a picture when TV is on, disappears into mirror when turned off)
bulletGreat video and better sound
bulletShare the Home Theater with the rest of the house
bulletONE set of controls…for EVERYTHING

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What is a Structured Wiring System and why is it important for my new home?Custom Home Theater

A Structured Wiring System simplifies and enhances a homeowners lifestyle. It offers organized and centralized distribution of today's low voltage wiring (cable TV, satellite, telephone, internet, ethernet, etc.) throughout a home. This is the most efficient and effective way to provide wiring in a new construction home. Basically, structured wiring consists of three elements: the distribution panel, the cabling, and the outlets.

The distribution panel, or service center, works like a sophisticated switchboard.  Outside services, including cable TV, telephone, DBS satellite, and internet, enter the panel and are distributed throughout the house.  The system is similar to the one used by the electrical breaker panel in the home to control electricity flow.

Certain services such as digital cable, digital satellite, high speed internet, and HDTV require the second part of the wiring system, high performance cables, to allow full access throughout the home. Most systems include RG-6 Quad Shielded coaxial cable for TV and video distribution, and Category 5 or better twisted pair cable for telephone and data.   RG-6 Quad Shield coaxial cable provides maximum protection  from interference with the TV or Satellite picture.  Category 5, 5e, or 6 cable provides high speed transmission of data or voice without cross talk or outside interference. 

Each room has  third part of the wiring system, the outlets, which can be customized to each users specific needs based on which services they want in each room (cable TV, Internet access, telephone, etc.)  Outlets that feature connections for voice, video, and data services on a single plate are known as multimedia or universal service outlets. 

One of the reasons why it is important to use a modern structured wiring system is that the older cable and wiring methods used by dealers in years past are not suitable for today's types of services and those that will likely enter the home in the future.

A typical structured wiring system will include data cables for telecommunication, audio, balanced-line video, computer data, and other applications. It will also include coaxial cables for wide-band entertainment, such as satellite television, cable television, HDTV, home-based composite video, and more. You may also include digital fiber optic cables to add additional  "Future Proofing" to your home.

Here are some additional FAQ's regarding today's advanced wiring standards:

What is Category 5 Data Wiring (CAT 5)?

bullet4 twisted pairs of high quality copper wire enclosed in an outer jacket.
bulletUsed for phone, fax, modem, home networking,  and high-speed digital computer transmissions.
bulletSupports four phone lines with one cable.
bulletHigh immunity to interference.
bulletRelative capacity: A garden hose.

What is RG6 Quad Shield Coaxial Cable?

bulletCoaxial cable with insulated center wire and four layers of shielding.
bulletSupports hundreds of channels and digital data.
bulletUsed for cable TV, digital satellite, HDTV, cable modem and high-speed interactive video services.
bulletHigh immunity to interference.
bulletRelative capacity: A fire hose.

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Types of modem/internet services:

        What is a Modem?

bulletUsed to transmit computer data over standard phone lines.
bulletTypically packaged in a new home computer.
bulletToday's standard computer modems transmit up to 56,000 bits per second.

        What is ISDN?

bulletISDN stands for Integrated Services Digital Network.
bulletDigital equivalent of standard computer modem transmission.
bulletTransmits high-speed data three times faster than today's standard modems (128,000 bits per second).
bulletService provided by the telephone company over high-quality copper phone wire.

        What is DSL?

bulletDSL stands for Digital Subscriber Line service.
bulletTransmits high-speed data anywhere from 50 to 270 times as fast as today's standard modems (1.5 million to 9 million bits per second).
bulletService provided by the telephone company over high-quality copper phone wire.

        What is Cable Modem Service?

bulletCable modems transmit high-speed data up to 900 times faster than today's analog computer modems (30 million bits per second).
bulletSince neighborhood users "share" available bandwidth, actual data throughput speed might be slower.
bulletProvided by the cable company over high-quality coaxial cable.

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What is Ethernet?

bulletCommercial networking standard for transmitting data between computers.
bulletComputers typically connected via cables to an Ethernet hub.
bulletEach computer must have an Ethernet network interface card.
bullet10BaseT means the computers are connected with twisted pair cable (CAT5) at 10 million bits per second data throughput.

What is Digital Satellite?

bulletWith Digital Satellite Service (DSS), video programs are received by a small (18") satellite dish.
bulletSignals are decoded at the TV with a set-top receiver.
bulletLocal channels are NOW available in our area!

What is Whole-House Video?

bulletAny video source can be seen on a specific channel on every TV in the home.
bulletVCR or DVD programs can be viewed on any TV.
bulletBaby room camera allows sleeping infants to be watched over from any room.
bulletFront door camera enables screening for possible intruders.

What is a Multi-Room Audio System?

bulletAny audio source (CD, Tuner, etc.) can be heard in any room throughout your home.
bulletFlush mount In-Ceiling or In-Wall speakers provide aesthetic benefits.
bulletGreat for entertaining or just relaxing.
bulletCapable of playing different sources in different rooms at the same time.

 

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The History of Home Wiring...Telephone

The Past:

bulletHome telephone wiring was designed for voice only.
bulletSecond lines were a luxury.
bulletSince 1910, telephone outlets have been "daisy-chained" together with low-grade telephone wire.
bulletPoor quality cable and bad connections are subject to noise, interference and "cross talk" (hearing other conversations).
bulletA single problem corrupts every phone outlet.

The History of Home Wiring...Television

bulletRooftop Antennas - Television broadcast were poor quality, and very susceptible to interference from weather.
bulletCable TV (circa 1975) - Improved picture, more channels, but still low picture quality by today's standards.
bulletRG59 Coaxial Cable - Small conductor, very little shielding and only moderate bandwidth.

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Today's Modern Home Wiring
 

bulletThree Major Components
bulletCentral Hub (also called Service Center) - central point accepts incoming services and distributes services throughout the home.
bulletHigh Performance Cabling - Category 5 telecommunications cable and RG6 Quad Shield coaxial video cable provide the "highway" for information to travel.
bulletHigh Quality Outlets - specifically designed to support advanced information services, outlets are the "off-ramp" to your computers, TVs and telephones.
bulletThe "Structured" Wiring System
bulletAll cables are "home-run" to the central hub instead of daisy-chaining.
bulletHigh-quality cable connections (also called terminations) ensure high-performance end-to-end system.
bulletCable management allows services to be easily redirected as the homeowner's family grows and their needs change.

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Home Automation- How does it make my home more intuitive and comfortable?

It’s the same old routine each and every day…and you love it!

7:00 AM
Your ‘alarm’ goes off - a pleasant voice announces over the in-wall speakers in your bedroom that “It’s time to wake up.” The curtains automatically open. The room lights come up to a comfortable level. Your favorite music begins to play. And the Weather Channel, with the sound muted, appears on your TV.

After a moment, you rise and head to the bathroom to get ready for the day where music is already playing. With just a ‘tap’ to the in-wall touch panel mounted beside the sink, you bring up the weather channel as you brush your teeth. Satisfied that you won’t need an umbrella you give the touch panel another ‘tap’ to start watching CNN Headline News.

The doorbell rings. The view on the touch panel automatically switches to the front door camera. It’s UPS with an overnight delivery. Not quite ready to face the world yet, you pick up the bathroom phone and tell him to leave the package at the front door. Turning off the news, you crank up the music and step into the shower.

When you head into the kitchen fifteen minutes later, the coffee has just finished brewing. Two cups later you ‘tap’ the kitchen touch panel before heading out the door. The audio/video system powers down; the lights slowly dim until they’re off, the thermostat adjusts to its ‘daytime’ setting and the garage door automatically opens.

So begins your day when living with in a "Smart Home".

ELAN Home Systems    

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What is High Definition Television and is it available today?

HDTV (high definition television) is the new standard in television technology which provides wide-screen picture quality similar to 35mm film along with compact disc (CD) sound quality.

DTV (Digital Television) is no longer just a mirage, shimmering on the horizon. Lots of people are already enjoying its crystal-clear picture and sound — and raving about it to their friends.  Once you've seen HDTV's ultra-sharp detail, lifelike depth, and vivid colors, regular TV seems dull and lifeless. HDTV owners swear that high-def viewing is "like looking through a window."

There are many benefits to having Digital TV and High Definition Television. Overall there are numerous reasons to make the switch: Digital superiority, amazing detail, progressive scanning, digital audio, no more 'ghost' images, the FCC mandating a switch, a wider viewing area, better quality DVD playback and so on. We have listed the major reasons in detail below.

 

The New Aspect Ratio

Current televisions are based upon the aspect ratio of 4:3. This means a TV with an aspect ratio of 4:3 will be 3 feet high and 4 feet wide. With HDTV the aspect ratio is 16:9, making the image much wider than a normal TV. The new screen size is 33% wider to be exact.

 

Comparison of the aspect ratio of a High Definition TV compared to a NTSC TV of the same height...

The increased width is a huge improvement because it allows you to view TV and movies as if you were watching them in a theater. When watching TV on a 16:9 screen you use your peripheral vision, which truly makes you feel like you are a part of the program.

Norm Samat, the directory of ABC's Monday Night Football HDTV feed put it perfectly:

"You almost get into a trance looking at HDTV pictures because you really see more. The wider 16:9 aspect ratio makes a big difference in covering football. With the old 4:3 aspect ratio screens it was often tricky to cover the defense. In HDTV they are already in your picture, so you can see more of the play develop."

 

Resolution

The usual resolution a normal NTSC TV can display is 525 scan lines with 480 actually being visible. The usual TV can display a resolution of about 210,000 pixels per image. High Definition TV's can go all the way up to 1920 (horizontal) x 1080 (vertical) pixels, with a total of 2,073,600 pixels per image. That is ten times the resolution and picture quality. Ten times!

 

Number of pixels on a HDTV monitor at 1920 x 1080 versus NTSC at 720 x 486...

In fact, when you squeeze all these pixels down to the same sized TV you get impeccable quality. Instead of stretching these pixels out, they are crammed together so tight that resolutions get as high and as sharp as they do.

 

Sound Quality

High Definition television also has 5.1 channels of CD-quality surround sound (left, right, center, left rear, right rear, and low frequency effects - AKA bass). These multiple channels bring you true surround sound at an amazing quality.

With the older NTSC standard you only get two channels of audio, which is just enough to make it stereo. With HDTV you are listening to Dolby Digital/AC-3 which is the same that is used in most movie theaters, DVD players and home entertainment systems!

 

No More Ghost Images

Many times signal quality is not perfect when watching regular NTSC television, which gives you what are called 'ghost images'. A ghost image is when you see two of the same person next to each other, as if there is a ghost of that person next to himself.

 

The shifted line judge on the right is meant to resemble a ghost image you might see on TV today.

With a digital signal you will always get a perfect image as long as the TV is receiving a quality signal. This means no more fuzz, no more snow and no more ghosts. Television the way it was meant to be watched!

 

Progressive Scanning

Regular NTSC signals are shown as interlaced signals. This means every other horizontal line of the monitor is displayed in one frame, and the other half of the horizontal lines are drawn in the next frame of the picture. This works because it happens so fast that the eye is deceived into believing that only one picture is being shown. Below this is shown in slower motion and on an image that is not moving for explanation purposes.

 

Comparison of Interlaced versus Progressive.  This is not the exact difference you see, but insted is designed to help you understand the difference.

Progressive scanning, on the other hand, displays the entire picture in one frame. This provides a sharper picture to the eye and looks much better than an interlaced image of the same resolution. With DTV there are two progressive formats for broadcasters to choose from: 480p and 720p. A 480p image is without question much sharper than a regular, NTSC broadcast, although it is only considered a DTV signal and not a true High Definition signal. 720p has 720 horizontal scan lines and is considered to be true HDTV. 720p can many times rival a 1080i picture, which is 1080 horizontal scan lines displayed as an interlaced image. This is because of the sharper, and more accurate picture 720p displays, even though 1080i has many more scan lines and a much higher resolution.

Multicasting

Multicasting is when a broadcaster sends multiple signals out over the same channel. Usually when multicasting, the quality of the broadcast is less than that of HDTV, but it is almost always better than regular NTSC television.

 

An example of a station broadcasting four channels instead of only one.

The benefit of multicasting is that a television station can air four or more signals at the same time and give you the choice of what you want to watch. There have been reports of stations multicasting a HDTV signal and an EDTV signal without much loss in the High Definition Signal, however this is usually not the case.

 

HDTV Reception Methods:


The big question everybody asks is: "What channels can I receive in digital or high definition format in my local area?" The answer is not quite as simple...

There are three ways of getting HDTV content, and all three ways will get you different channels and different HDTV resolutions. These options are listed below:

 

HDTV over Satellite

Satellite HDTV Programming...  

A satellite company such as DirecTV or Dish Network will allow you to get high definition programming from them. If you go this route, you will have to pay a little extra to receive local channels if you wish to watch your local network broadcasts. Even if your local networks are broadcasting in High Definition, you will only get standard definition signals as DTV and HDTV take up too much bandwidth. Your HDTV channels will most likely include an east or west cost feed of CBS, HBO, Showtime, Pay Per View, HD Net and so forth. Look at the corresponding pages on this site to see which high definition channels each satellite company provides. If you decide to get HDTV programming from a satellite company you will have to:

 

bulletGet a subscription from the specific satellite company that includes HDTV programming.
bulletBuy a satellite dish that is capable of receiving HDTV signals from the satellite company you wish to receive high definition broadcasts from.
bulletBuy a Set-Top-Box that is capable of decoding High Definition channels and is compatible with the specific satellite provider you choose.
bulletBuy a High Definition TV to view the signals.
bullet 


HDTV through Local Cable Companies

Local Cable Companies offering HDTV Signals...  

Cable companies are just starting to provide HDTV broadcasts and almost all local cable companies in Louisiana offer HDTV services.  If you decide to do this you will have to:

 

bulletGet a subscription from your local cable provider who supports HDTV .
bulletBuy or rent a Set-Top-Box that is capable of decoding High Definition channels and is compatible with the specific cable company you choose.
bulletBuy a High Definition Television to view the signals.

Many people are confusing Digital Cable with HDTV and DTV. These are two completely different things. If you get Digital Cable, this usually does not mean you are already set up to receive HDTV signals. (Though it is possible...)




HDTV reception Over The Air

DTV reception from OTA (Over the Air) broadcasters...  

OTA stands for Over the Air and is when you set up an antenna to get broadcasts from a local tower. If you get signals OTA you will not have to pay a subscription to a cable or satellite company and the programming is completely free. This does, however, limit you to only a few channels and is why most people receiving HDTV programming over the air also get programming from a cable company or satellite company as well. If you decide to do this you will have to:

 

bulletBuy an antenna that is satisfactory for your location compared to the broadcast towers near you. To find out what type of antenna you might need, visit AntennaWeb.Org
bulletBuy a Set-Top-Box that is capable of receiving and decoding High Definition channels over the air.
bulletBuy a High Definition TV to view the signals.

Of course, you can choose to get HDTV from multiple sources at the same time. Many people get both Satellite and OTA signals since OTA does not cost anything except the initial setup! Plus, if you are getting HDTV over satellite that may mean you already have a STB that can decode OTA signals too.

COX COMMUNICATIONS for New Orleans and Jefferson now offer these High Definition channels: HBO, SHOWTIME,  Discovery Channel, ESPN, MTV, In-Demand, and most local channels.

Click this link to see exactly which type of antenna you will need to pick up these digital signals in your area.

 

HDTV or HDTV-ready?

Once you've determined which DTV signals are available to you, it's time to think about which type of digital TV makes the most sense. There are two basic paths to HDTV viewing.

bulletAn HDTV (sometimes called an "integrated HDTV") combines an HD-capable display and an HDTV tuner in one package. The tuner can usually receive both digital and analog over-the-air broadcasts. The FCC (Federal Communications Commission) mandated that as of July 1, 2006, all TVs with screens 25" and larger must include an over-the-air digital tuner, and by march 1, 2007, all TVs 13" and larger must include a digital tuner. You'll find that nearly all HDTV sets use the widescreen 16:9 aspect ratio.
bulletAn HDTV-ready TV (also called an "HDTV monitor") has the high-scan-rate display, but must be connected to a separate HDTV tuner to receive digital broadcasts. Most HDTV-ready TVs include an NTSC tuner for viewing regular analog programs. HDTV-ready TVs can have either the conventional 4:3 aspect ratio or the widescreen 16:9 ratio.

Both HDTV sets and HDTV-ready TVs are available in flat-panel, big-screen (rear-projection), and tube designs. These high-resolution screens give images more impact. And because the screen's pixels and horizontal lines are less noticeable than on conventional TVs, you'll probably find that you can sit closer than with a conventional TV. Therefore, you may want to go with a larger screen than if you were shopping for an analog TV.

If you're lucky enough to live in an area where most or all of the TV programming you care about is already available via over-the-air digital broadcasts, an integrated HDTV is probably a wise choice. But if digital broadcasts are limited in your area, or if you subscribe to a satellite TV service, you can buy an HDTV-ready TV now, then add a separate HDTV tuner later.

 

HDTV resolution: Watch your p's and i's

The reason that digital TV — HDTV in particular — looks so much better than analog TV comes down to two words: higher resolution. Conventional NTSC television offers 480 lines of vertical resolution — 480 scanning lines stacked tightly one on top of the other. Each of these horizontal lines is 720 pixels across. So, conventional TV resolution is often described as "720 by 480." Because NTSC TV signals are interlaced-scan, analog TV signals are often referred to as "480i." The only video source that takes full advantage of NTSC resolution is DVD.

While 480i is the best quality signal available in NTSC, it's the lowest quality signal in digital TV. Surprisingly, there are a total of 18 possible DTV broadcast formats (see the DTV format chart on our TV FAQ page), which all fall into two basic categories:

bulletHDTV (High-Definition TV) is a widescreen, near-film-quality format featuring Dolby® Digital audio (but not necessarily 5.1-channel). The two most common HDTV varieties are 1,080-line interlaced scan (1080i) and 720-line progressive scan (720p). 1080i has 1,080 lines of vertical resolution and 1,920 pixels across each line. 720p has 720 vertical lines with 1,280 pixels across each line.
bulletSDTV (Standard-Definition TV) offers significantly less resolution than HDTV. All SDTV formats are either 480p or 480i. Still, even the lowest resolution SDTV signals produce better picture quality than current analog broadcasts. That's because digital broadcasts don't suffer from analog distortion such as "snow" or "ghosting." With digital broadcasts, you either get a clear picture, or if the signal is too weak, no picture at all.

Plus, you'll see some TVs described as "EDTV."
bulletEDTV (Enhanced-Definition TV) refers to the display resolution of some plasma and flat-panel LCD TVs. There's no such thing as an EDTV signal or format; it's strictly a type of TV. EDTVs display all signals at 480p resolution — the same as progressive-scan DVD. An EDTV set won't look as sharp and detailed as an HDTV, but is noticeably superior to a standard tube TV. Most current EDTVs are widescreen designs with 480 lines of vertical resolution and 852 pixels across each line.

Although HDTV tuners (whether they're separate units or built into an HDTV) are capable of receiving all 18 DTV formats, the typical HDTV screen cannot display all of them. Building a TV display that could detect and switch between so many resolutions would be extremely expensive.

Instead, most TV manufacturers build High-Definition TVs and HDTV-ready TVs that display one or two formats, called the "native display" formats. The TV's tuner can receive any of the 18 signal types. But those signals are converted inside the tuner to one of the TV's native display formats. Conventional analog video signals are typically "upconverted" by this same circuitry. Upconversion works great with a high-quality source like DVD, and can significantly improve the look of decent signals from antenna, cable, or satellite. But it can't work miracles for snowy analog antenna reception or a noisy cable picture.

Because 1080i is the most popular high-definition format for over-the-air and satellite HDTV broadcasts, most CRT-based TVs use it as their High-Definition native-display rate. The other common native rate for tube-based TVs is 480p (for SDTV broadcasts and progressive-scan DVD). If you were to watch a 720p High-Definition broadcast, the TV would typically convert the 720p signal to either 1080i or 480p — although some HDTV-capable TVs cannot accept a 720p signal. A 720p broadcast converted to 1080i still looks very sharp, but if you are particularly interested in viewing 720p HDTV programs, you should try to find a TV with a native display rate that is at least close to 720p.

"Fixed-pixel" TV designs, which include plasma, LCD, DLP, and LCoS, have a single native display rate, and all incoming signals must be converted to match that rate. So, for example, a 46" DLP TV with a resolution of 1280 x 720 pixels (720p) uses a built-in "scaler" to convert every incoming signal — from regular 480i all the way up to 1080i HDTV — to 720p.

 

The digital TV transition has finally entered the home stretch

Until the transition to digital television is complete, TV stations will continue broadcasting on their analog channels while phasing in digital broadcasts on a separate DTV channel. Several years ago, the FCC established a timetable for terrestrial (over-the-air) broadcasters to convert to DTV. While many stations missed earlier deadlines, most commercial and public TV stations are currently broadcasting digitally at least part of the time.

Earlier deadlines weren't strictly enforced, but everyone seems to be taking the recently proposed 2009 analog shutoff date more seriously. A substantial amount of money is involved — the analog bandwidth that has been occupied by TV broadcasters will be auctioned off and is expected to generate billions of dollars for the government. You should be aware of the following dates:

bulletJuly 1, 2006: As part of the FCC's "tuner mandate," all TV sets with screens measuring 25" or larger must include an over-the-air digital tuner. Note: this rule doesn't apply to "monitor" displays which lack any type of built-in tuner.
bulletDecember 31, 2006: This was the FCC's original target "analog shut-off date" when all TV stations would have been required to turn off their analog signals. However, the proposal included a loophole that allowed the deadline to be extended until most homes (85%) in an area were capable of watching digital TV programs. This deadline is no longer in effect.
bulletMarch 1, 2007: The final requirement of the tuner mandate calls for all TVs with screens measuring 13" or larger to include an over-the-air digital tuner. Again, this won't apply to monitor displays.
bulletFebruary 17, 2009: In legislation passed in early Feb. 2006, the U.S. Congress chose this date for the "analog shut-off," when all TV stations would be required to turn off their analog signals. The measure is part of the budget bill, which still must be signed by President Bush, but it seems safe to predict that over-the-air analog TV signals will cease sometime in early 2009.

If 2009 rolls around and you still don't own a digital TV, don't worry — you won't be left staring at a dark screen. Any TV connected to a cable or satellite set-top box should continue to work just fine. Plus, all versions of the analog shutoff legislation proposed so far have included significant funds — at least a billion dollars or so — earmarked for helping owners of analog TVs purchase inexpensive converter boxes that would allow them to view over-the-air digital broadcasts on their old TVs.

Stay tuned for more news on  High Definition Television...

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Can I incorporate your services into my existing home?

Yes, depending on the age, style, and size of your home.  If you would like to set up a free in-home consultation, please visit our contact us page.

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What are the different Surround Sound formats (Dolby Digital, DTS, THX, etc.)?

Surround format Number of
channels
Types of channels Type of media with which the format may be used
Dolby® Pro Logic® 4
bullet2 discrete, full-bandwidth channels (front left and right)
bullet1 matrixed, full-bandwidth channel (center)
bullet1 matrixed, limited-bandwidth channel (surround left and right)
bulletstereo and Dolby Surround-encoded VHS movies and broadcast TV programs
bulletcan be downconverted from any Dolby Digital source
Dolby Pro Logic II 5.1
bullet2 discrete, full-bandwidth channels (front left and right)
bullet3 matrixed, full-bandwidth channels (center, surround left and right)
bullet1 subwoofer channel via Pro Logic II's bass management
bulletstereo and Dolby Surround-encoded VHS movies and broadcast TV programs
bulletstereo music
bulletvideo games
Dolby Digital up to
5.1
bullet5 discrete, full-bandwidth channels (front left and right, center, surround left and right)
bullet1 discrete LFE channel (subwoofer)
bulletall DVDs
bulletsome broadcast HDTV
bulletsome DBS
DTS®

Digital Theater Systems

5.1
bullet5 discrete, full-bandwidth channels (front left and right, center, surround left and right)
bullet1 discrete LFE channel (subwoofer)
bulletsome DVDs are DTS-encoded
bulletsome CDs are DTS-encoded
Dolby Pro Logic IIx 6.1
bullet2 discrete, full-bandwidth channels (front left and right)
bullet4 matrixed, full-bandwidth channels (center, surround left and right, and back surround)
bullet1 subwoofer channel via Pro Logic IIx's bass management
bulletstereo and Dolby Surround-encoded VHS movies and broadcast TV programs
bulletstereo music
bulletvideo games
Dolby Digital EX 6.1
bullet5 discrete, full-bandwidth channels (front left and right, center, surround left and right)
bullet1 matrixed, full-bandwidth channel (back surround)
bullet1 discrete LFE channel (subwoofer)
bulletsome DVDs are Dolby Digital EX-encoded
bulletregular Dolby Digital 5.1 DVDs can also be used with a Dolby Digital EX decoder
THX Surround EX™ 6.1
bullet5 discrete, full-bandwidth channels (front left and right, center, surround left and right)
bullet1 matrixed, full-bandwidth channel (back surround)
bullet1 discrete LFE channel (subwoofer)
bulletcan decode any Dolby Digital or Dolby Digital EX source
bulletcan be used to enhance Pro Logic, Pro Logic II, DTS, or DTS-ES decoding
DTS-ES™ 6.1
bullet6 discrete, full-bandwidth channels (front left and right, center, surround left and right, and back surround)
bullet1 discrete LFE channel (subwoofer)
bulletsome DVDs are DTS-ES-encoded
bulletregular DTS 5.1 DVDs can also be used with a DTS-ES decoder

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What are the different TV screen types (Plasma, CRT, LCD, Rear Projection)?

Understanding TV Types

 

Display
Type

Screen
Size

Wall
Mountable

Viewing
Angle
(side to side)

Contrast Ratio
& Black Level

Potential for
Screen Burn-In

Notes

Flat-panel TVs
Plasma 37"-65" Yes Excellent
 
Very Good Moderate
bulletPros: screen's phosphor coating creates lifelike color that is closest to conventional tube TVs
bulletCons: vulnerable to burn-in although it's less of an issue for newer models
LCD 13"-46" Yes Good to
Very Good
 
Good None
bulletPros: panels weigh less than plasma and use less energy; burn-in not an issue
bulletCons: picture slightly less natural than top plasmas
 
Digital
Big-screen TVs

DLP 42"-72" No Good
 
Very Good None
bulletPros: typically has best blacks and shadow detail among digital big-screens; smooth motion handling
bulletCons: a few viewers sensitive to "rainbows"