Ben Anton asked:




All home entertainment units have three major components that are essential to creating a functional home theater system. The main focus of any theater is the television or video display. Sound quality is essential. A complete sound system is key to providing the soul and voice of the theatre. A source player is the third element, providing the picture and sound. Cable or satellite TV is standard in most homes but DVD and other players are also added to expand the usefulness of a home theater. It is these three major pieces of electronic innovation that make watching a movie, playing the XBox or listening to a favorite CD enjoyable and worthwhile.

Visual Element

There are video display options available to a home depending on budget and preferences.

Rear Projection Television. Television technology has been based on the cathode ray tube (CRT) up until the 21st century. In a rear projection TV, there are three tubes, each representing one of the primary colors. This colors mix along with quality wiring and a good screen, provide a very high resolution picture. Manufacturers are starting to drop rear project televisions from their product lines however. Research your manufacturer's warranty before purchasing a rear projection television to make sure that customer service and repairs will be available down the line.

Liquid Crystal Display (LCD) Television. An LCD TV can be found as both a rear projection and as a flat screen. LCD rear projection TVs are much more compact than their CRT cousins and use less power. I have written about LCD televisions extensively in other articles so I will forego further explanation here.

Plasma Screen Televisions. In this technology, different gases are trapped between two panes of glass and an electronic signal can modify them to allow them to display a picture. These televisions are produced with a sleek thin design and can produce excellent resolution.

No matter which video display you are leaning toward, make sure to measure the area you want to put the TV so it fits when you bring it home. Also look into whether the screen is able to handle high definition (HD) television and DVDs.

Audio Elements

The sound system is going to make a huge difference in the enjoyment and functionality of your home theater. A good audio system includes the following elements:

Receiver. This component takes the audio signal, and often the video signal, and distributes it to the proper part of your system.

Amplifier. This component is what increases the signal strength before it is sent to the speakers. Often times, a purchased receiver will have an amplifier already built into it, making an additional piece of equipment unnecessary.

Surround Sound Speakers. Standard speaker sets of five are typical for most home theaters. There is a center channel, a right front, right rear, left front and left rear. These different speakers, when properly positioned, make the sound come from the appropriate direction.

Data / Signal Source

A basic DVD player is a standard signal source in most theater systems. The signal information sent from the player contains the video data as well as your 5.1 surround sound. Your cable box or digital satellite is also signal sources for a home theater. These sources can all be used in one system with the proper wiring and remote programming.

~Ben Anton, 2008

Ricardo

Steve Faber asked:




How to Pick the Correct Projector for Your Home Theater

You're finally making the jump to the holy grail of home theater video displays; the front projection system. There's nothing else that delivers that really big, impressive video image like a front projection system. It's how you get that real cinema experience in your home theater. Home theater projector prices have plummeted in recent years, and the size of the units have shrunk right along with the prices. No more do have to live with a coffin sized box on your ceiling. As sizes have decreased, the image quality and brightness have actually improved dramatically. You'll notice image quality and brightness are two separate issues.

How do choose the correct home theater projector for your application from the myriad of projectors on the market today? There are so many different units, each with their strengths and weaknesses. First of all, there are two main projection technology categories, analog and digital. Analog projectors are based on CRTs, a mature technology that's been around for decades. Those are the projectors with the separate red, green and blue picture tubes and three lenses on the front. The other projectors use one of the newer digital technologies. These projectors have a single lens on the front. There are three major types of digital projectors on the market today; LCD (Liquid Crystal Display), DLP (Digital Light Processing) and LCOS (Liquid Crystal On Silicon). Each type of digital projector has it's advantages too.

You need to evaluate your specific requirements in order to make the proper decision. First of all, look at the room. Is it a dedicated home theater or a multi use room? Do you have complete control of the light? What aesthetic concerns are you dealing with? What is your projector budget? How large of an image do you want? Do you watch primarily DVD movies, TV movies, sports, or other TV programming? What specific source components will you be using with your projector now or in the future? Is picture quality the most important thing, or are other concerns, such as noise, size or brightness more important? Are you installing the projector yourself, or are you hiring a custom installer to do the installation for you? Where must the projector be placed? Can you get the required video and control cables to that location? These questions must be answered to ensure you get the proper projector for your home theater. If you are using a custom installer, they will take into account these factors and specify the appropriate unit for you.

Dramatic improvements in the picture quality of digital projectors notwithstanding, CRT projectors still deliver the most film like image. They have no pixel structure and deliver rich, deep blacks. Properly set up and calibrated, with a good video processor, and with the proper size screen, a CRT projector will deliver simply stunning picture quality. You'll need to use a good quality projection screen, typically with 1.3 - 2.5 gain depending upon the size, viewing angel and ambient light in the room. Prices on really great CRT projectors have fallen like a rock in the last year or two. You can get a 9" CRT projector that used to cost $35,000 to $50,000, for less than a third of that figure now. Many firms no longer make CRT projectors due to the decreased demand for projectors using this technology. In addition, the required video processors have decreased dramatically as well. Ten years ago a great video processor used to cost $10,000 to $20,000. Now you can get one for well under $5,000 and as little as $2,000, brand new. They also easily last 8,000 - 10,000 hours when properly set up.

If they are so fantastic, why doesn't everybody still use CRT projectors? Well, there are many detriments to a CRT projector as well. The best ones, with the 9" tubes, are simply huge. It's like hanging an upside down bathtub on your ceiling. If you want to put one under a coffee table, it'll be one large table. They are also very heavy, around 150 - 200lbs, so you need the proper structure to support them. CRT projectors also require precise placement. They must be perfectly square with the screen, at the correct elevation for good picture quality. In addition, while many digital projectors have zoom lenses, allowing the projector to be placed at a range of distance from the screen, CRT projectors must be at a very precise distance for a specific screen size. These factors severely limit placement options. While the larger CRT projectors put out more light than their smaller counterparts, they have pretty dim images compared to even the least expensive digital projectors. Finally, CRT projectors require specialized setup in order to get a watchable, much less an optimum image. Every 6 months to a year, they must be re-calibrated to ensure you are still getting optimum picture quality.

There are some very good reasons why most people are using digital projectors in their home theaters today. Many are small and light, require minimal setup and calibration (compared to a CRT), are quiet and have a bright, sharp image. But, there are many different digital projectors, ranging in price from around $700.00 to over $100,000.00. Which one is the best for your specific application? Thankfully, the situation is changing, but many of the digital projectors marketed for home theater use are really just re-badged presentation units. Presentation projectors sacrifice good video quality for brightness. Brightness is much more important when giving a Powerpoint presentation in a lit room than the correct color palate or the black level. The red on the pie chart looks great, no matter what, as long as you can see it from the back row.

You want to choose one of the newer units that has been truly designed for home theater applications. The actual technology used for the imaging chip is not all that important, there are great examples using all three of the digital technologies. Companies such as Sony, Runco, InFocus, Vidikron, Marantz, Benq, Panasonic, Sharp, Optima and Sanyo and some others all make great home theater projectors. The projector will have great black levels, to accurately reproduce detail in the darker areas of the picture and give great contrast. Absolute brightness is not extremely important, unless you have a multi-use room without complete light control or you have a lot of people over for sporting events. If you are entertaining many people for sports, it's nice to have some light on in the room, so a brighter projector is advantageous.

Projectors come in a number of different resolutions. The lower the resolution, the smaller the screen you can use before you can see pixel structure. Also, the lower resolutions will not support true HDTV. Most will display HD, but at a decreased resolution. The lowest end projectors typically have resolutions of 800 x 600. The Texas Instruments Matterhorn chip is popular on budget priced wide screen projectors, and has a resolution of 1024 x 576. Anything over a resolution of 720 will allow for true HDTV. The TI series of HD-2 DLP chips has a resolution of 1280 x 720. In April of 2005, TI announced new DLP chips with 1920 x 1080 was ready for production, allowing for true 1080p resolutions. Projectors with this chip will begin shipping in Q1 of 2006. Blu-Ray Disc has stated they will support 1080p, so by late 2006 there will be commercially available 1080p content besides Microsoft's WMHD discs.

Another very important aspect of home theater projectors is the internal video processing. This is one of the primary differences between good home theater projectors and presentation projectors. Digital projectors must display progressive scan images at the native resolution of the chip, so any interlaced signal, such as 1080i HDTV, must be de-interlaced and then scaled to the native chip resolution. Poor quality video processors, weather in the projector or external units, cause all sorts of video artifacts that can get in the way of a satisfying video presentation. This subject alone is too in depth for this article, as entire texts have been written on the subject. However, one common video artifact is "jaggies" where diagonal lines are jagged instead of straight. Another annoying artifact caused by poor video processing is moire'. This is a pattern seen as alternating light and dark lines that change position as the image moves.

You'll want to be sure your projector supports the HDMI or DVI with HDCP copy protection to allow you to connect a HD-DVD, scaling DVD player or Blu-Ray Disc player. These devices will only allow maximum resolution on a display that has a digital video input with HDCP copy protection. In the future, cable TV and satellite providers may restrict the maximum resolution to their digital outputs too.

When choosing your new home theater projector, make sure it has the video quality, brightness, size, auditory and budget characteristics that you need. Projectors are a large investment, choose carefully and you will be rewarded with years of thrilling video in your home theater.

Kim

Chet Holcomb asked:




Having your own Home Theater is something for the entire family to enjoy that can be rather fun while shopping for your home theater and setting up your system. The biggest problem is most people do not understand the terms used and so born is our Home Theater Buyers Guide.

I will honestly say that most people are overwhelmed by the terms used in electronic equipment like AC3, Aspect Ratio, Bridging and the list goes on. Most of the term relating to home electronics are baffling to the majority and really intended for technical purposes...So do not get discouraged and give up. You can see our Home Theater Dictionary for an explanation of the terms used in home theater electronics.

The two most important thing in your home theater is to know what viewing quality you want and what sound you desire.
By visiting your local Electronics store you can get a good idea from viewing the equipment up close for picture and sound quality and most sales people have the knowledge of there equipment that can convey to you in laymen terms.

Once you have decided on a practical system you can buy from the Electronic store, or go online where the best deals are made.

The items listed below are what you should be concerned with in selecting a home theater system.

Video Selection #1 in Level Of Importance

1. Choose a TV at least 27 inches, preferably the bigger the better that will fit in your home theater area with plenty of room left over for comfort and a screen size that you do not have to strain to view.
Most larger TVs are as cheap as the smaller Tvs today...so get what you want the first time around.

The items listed below are what you should be concerned with in selecting a home theater system.

2. Flat screen TVs are the most common for good non glare viewing and are LCD (liquid crystal display) and have optional Plasma screens which is a display technology that you may not notice unless you have the two side by side.

3. Some TVs have built in DVD/VCR and we recommend purchasing a DVD/VCR as a separate component in case of failure.

4. Rear projection TVs are available in TVs with larger screen size of 42 inch and above and is not a advantage in viewing quality.

5. DLP (Digital Light Processing) projection system bring more light from lamp to screen. It also features better color uniformity over time--no burn-in, screen aging or color-shifting possible and is recommended feature for crisp, clear picture viewing.

6. HDTV (High Definition TV) is on the way is and will be the future of TV and is recommended as a must have.

7. HD Ready (High Definition Ready) is a TV that supports high definition signal when using a separate set box.

8. AVR Receivers(see audio section)for TVs relate more to audio, but do play a role in the refresh rate of the screen, provide video input for games, other devices and synchronizes the sound to the picture. Other type receivers are satellite and HDTV.

9. DVD player/recorder/VCR play and or, record from DVD disks and can be separate components, or all in one unit called combo units. Some DVDs support Windows media such as CD/CD-RW for playing music and, or showing your stored pictures and music.

Sound Selection #2 In Level Of Importance.

Sound is not as important to some as related to the core of the home theater....which is the picture they see.
TVs have speakers built in that will suffice for the better part of us, but add a few good speakers and you have quality sound.

Your home theater room, or area plays a major part in how the sound is interpreted in relation to the acoustics of the room,size, furniture, walls, curtains, carpet etc that absorb the signal. As an example a long rectangle room with carpet will have better acoustics than a square room with hardwood floors.
Really do not expect exact movie theater sound from your existing rooms because a theater is designed especially for this purpose, unless you plan to build a special room. Whatever you decide you will experience better sound with the right components.

1. AVR Receivers control every aspect of your sound system and video and is the brain that takes the video portion then transmits signals into sound. AVR Receivers come in various watts that have separate channels to control and balance speakers.

2. Speakers come in all sizes and shapes and are a good investment if you want the most out of sound . The quality of sound is determined by the watts of power they produce..ie a 100W will produce more sound quality than a 50W. The receiver is matched in wattage to correspond with the wattage of the speaker. Of all the audio components below, speakers are the most important of all so get the best you can.

3. Sub woofers increase the bass capabilities of your sound system. Not a necessity unless you like the sound of thundering explosions in an action movie.

4. Surround Sound will deliver a cinematic sound quality to your home theater, but is not an essential component.

Home Theatre Mini System ("In A Box")

With a mini system all you need is the TV and installation is much easier than using separate components which may require you hiring a professional. You can get a mini system with just about any feature you want to include DVD/DVR/VCR/AVR/CD, speakers, sub woofers, surround sound etc...The systems are much cheaper in cost than purchasing separate components and the drawbacks are you may be limited on what you can output if you want additional add-on such as video games,extra speakers etc. The mini home theater is basically to run the components provided in the kit and if you want to add on you may not be able to. Another drawback is you may be sacrificing superior video and sound quality for lower a price. Just like anything else there are good mini home theaters and better ones...So get the best if you go this route.

Elmer