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What You Should Know About HDTV

From http://www.hometheatermag.com/gearworks/1106gear:

1080i v. 1080p

By Geoffrey Morrison, November, 2006

Less than meets the eye. The most frequently asked questions I've received this year have been about the difference between 1080i and 1080p. Many people felt—or others erroneously told them—that their brand-new 1080p TVs were actually 1080i, as that was the highest resolution they could accept on any input. I did a blog post on this topic and received excellent questions, which I followed up on. It is an important enough question—and one that creates a significant amount of confusion—that I felt I should address it here, as well.

Illustration of how 24 frames of video are sent from a video source to a 1080i and a 1080p display

There Is No Difference Between 1080p and 1080i

My bold-printed, big-lettered breaker above is a little sensationalistic, but, as far as movies are concerned, this is basically true. Here's why. Movies (and most TV shows) are shot at 24 frames per second (either on film or on 24-frame-per-second HD cameras). Every TV sold in the United States has a refresh rate of 60 hertz. This means that the screen refreshes 60 times per second. In order to display 24-frame-per-second content on a display that essentially shows 60 frames per second, you need to make up or create new frames. This is accomplished by a method called 3:2 pulldown (or, more accurately, 2:3 pulldown). It doubles the first frame of film, triples the second frame, doubles the third frame, and so on, creating a 2-3-2-3-2-3 sequence. (Check out Figure 1 for a more colorful depiction.) So, the new frames don't have new information; they are just duplicates of the original film frames. This process converts 24-frame-per-second film to be displayed on a 60-Hz display.

It's Deinterlacing, Not Scaling

HD DVD and Blu-ray content is 1080p/24. If your player outputs a 60-Hz signal (that is, one that your TV can display), the player is adding (creating) the 3:2 sequence. So, whether you output 1080i or 1080p, it is still inherently the same information. The only difference is in whether the player interlaces it and your TV deinterlaces it, or if the player just sends out the 1080p signal directly. If the TV correctly deinterlaces 1080i, then there should be no visible difference between deinterlaced 1080i and direct 1080p (even with that extra step). There is no new information—nor is there more resolution, as some people think. This is because, as you can see in Figure 1, there is no new information with the progressive signal. It's all based on the same original 24 frames per second.

In the case of Samsung's BD-P1000 Blu-ray player, the player interlaces the image and then deinterlaces it to create 1080p. So, you get that step regardless.

Two caveats: Other Blu-ray players can output 1080p/24. If your TV can accept 1080p/24, then it is adding the 3:2 sequence, unless it is one of the very few TVs that can change its refresh rate. Pioneer plasmas can change their refresh rate to 72 Hz, and they do a simple 3:3 pulldown (showing each film frame three times). This looks slightly less jerky.

If you're a gamer, then there is a difference, as 1080p/60 from a computer can be 60 different frames per second (instead of 24 different frames per second doubled and tripled, as with movie content). It is unlikely that native 1080p/60 content will ever be broadcast or distributed in wide numbers. The reasons for this are too numerous to get into here, but I list them in my follow-up blog.

So Don't Worry (Or Only Worry a Little)

Without question, it would be better if all TVs accepted a 1080p input. (Read that again before you start sending your e-mails.) What I hope this article points out is that, if you have a 1080p TV that only accepts 1080i, you're not missing any resolution from the Blu-ray or HD DVD source. If a TV doesn't correctly deinterlace 1080i, on the other hand. . .well, that's a different article (which is conveniently located on page 64).

From http://www.tigerdirect.ca:

Damned if I know!
Image of cables Need cables for your new Plasma, LCD or DLP TV?
We carry a full line of home electronics cables for much less than you expect!  We have hard to find extra-long cables, S-Video cables, DVI cables and more. We have cables for any specific need or to accommodate any option you'd like to add to your system!

Click Here for Cables Matched to This Item.

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Digital-ready logo ATSC - Means 2009 Digital TV Ready
Buy with confidence that ATSC TVs are designed for the future!
The ATSC Standard for Digital Television (DTV) encompasses a number of Standards, Practices, and Guidelines for Digital Television. What it means for today's television consumer is that ATSC TVs are ready for the future!  They comply with the requirements for the transition to Digital TV sets and all digital transmission to occur by February 17th, 2009.  ATSC Digital Ready TVs have digital tuners already.  TVs and related Tuner products that are not ATSC will require a separate digital tuner after the transition date.

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Image showing size of display using diagonal measuring How To Pick Your Best TV Size? How Do You Watch TV?
Does your family gathers together on movie nights?  Are you a lone sports fan who really gets into your favorite game, or has the whole neighborhood over?  Do you have an intimate TV room, or a huge home theater?  Do you watch in the bedroom, or the living room?

The size of the TV that's best for you and your family depends on how you like to spend your time and the size of your room.

  • FAMILY ROOMS
    For family rooms and other spaces with high TV use, 37 inch and larger are the most popular choices.  In large rooms, the largest size possible is usually best.
  • BEDROOMS
    For bedrooms, offices and other medium-sized spaces, look in the 26 to 37 inch size range.
  • KITCHENS & SMALL ROOMS
    For kitchens and smaller rooms where you are closer to the TV, consider a 15 to 19 inch screen.
wide screen
diagonal size
minimum
viewing distance
maximum
viewing distance
26 inch 3 ft 6 ft
32 inch 3 ft 7 ft
37 inch 4 ft 8 ft
42 inch 5 ft 10 ft
47 inch 6 ft 12 ft
60 inch 7 ft 15 ft

Limited Space?

Click Here For Our Unique TV Sizer!Are you limited in the space you have available on the wall or in a piece of furniture?  We have the perfect tool to help you calculate the exact size that will fit!

Just Click Here

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tv type How To Pick Your Best TV Type?
Several important factors determine the quality of your HDTV picture.  So how do you find a picture you like?
  • TV TECHNOLOGY
    As you probably already know, there are several TV technologies available.  LCD televisions are thin and lightweight with a high-quality picture, even in brightly lit rooms.  Plasma screens are heavier than LCDs but may deliver a slightly picture in dark rooms with more intense colors.  DLP TVs offer brilliant screens, but are thicker than LCDs or Plasma.
  • RESOLUTION
    Think about TV resolution as the number of pixels contained in one "frame" of a television show or movie.  More pixels in each frame will give you better picture detail.  720P and 1080P are the two most common resolution standards for HDTV now.  With about 1 million pixels in each frame, 720P provides a vivid, high definition picture. 1080P offers the highest level of HDTV quality with over 2 million pixels in each frame, creating even greater picture details.  While broadcast is mostly limited to 720P, 1080P is the standard for high definition disc players like Blu-Ray.
  • CONTRAST RATIO
    Contrast ratio is a number that measures the difference in light intensity between the brightest white and the darkest black on the screen.  In general the higher the contrast ratio number, the better the image quality.  Most times, you will find Dynamic Contrast Ratio specified, but be sure you are comparing the same type of contrast ratio.
  • CONTRAST ENHANCEMENT
    Another way to improve contrast ratio is with contrast enhancement technology. Most of the time, this uses back lighting to improve apparent contrast.  This is especially helpful in dark rooms, as it helps your eyes adjust to the best light levels.  This dynamically improves contrast, resulting in deep blacks in darker scenes without losing fine details in shadows and other dark areas of the picture.
  • BIT COLOR
    Another important contributor to picture quality is what is called "bit depth".  This is the size of the number that is used to assign colors on the screen.  The higher the number, the more displayable colors will appear (see the image below).  Of course this is only true if both the display processor and the panel support that number of bits!

Unknown
More Bits = More Colors

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HDTV connection pictured

What Is High Definition And How Is It Different From Standard Definition?
High Definition or "HD" is a technological leap forward from standard definition, with up to 6x the picture resolution, so that what you see is sharper and more realistic.  Regular TVs and the TV channels you watch at home are typically in standard definition (unless you watch HD channels).  DVD are also in standard definition.  Standard definition (480i & 480p) is lower quality than high definition.  Many older TV sets are standard def, and can only show standard def content (programming).  Many new TVs are called High Definition TVs (HDTV).  They are capable of showing high def content in: 720p, 1080i, and 1080p, all high definition formats, but 1080p provides the highest picture quality of them all.
Click Here To Learn More »

Graphic displaying differences between screen resolutions

TV rear connections displayed

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Logo for HDTV reseller value protection plan How To Protect Your HDTV And Make It All Work!
You've bought your ideal television or home theater, but have you considered how you will protect it, or make it all work together?  It's not as complex as it might seem, but it is important to consider, since devices may work differently, and have incompatible modes.  Plus after investing in your hardware, bad things can happen to damage them.
  • MOST IMPORTANT: SURGE PROTECTION
    Power Protection For Your HDTV & Home TheaterIf you have a computer, you know all about surge suppressors and battery back-up UPS devices.  But do you have a UPS for your HDTV and Home Theater system?  HDTVs and Home Theater systems are just as susceptible to surge and power damage as computers, so it is critical you add a very good surge suppressor or UPS to your setup at once! Plus if you have a UPS, you'll be able to watch TV or listen to music if the power goes off! (for as long as the battery lasts of course!)

    Click Here for Power Protection products.
     
  • CONTROLLING IT ALL: ADVANCED REMOTE CONTROLS
    Advanced Remote Controls For Your HDTV & Home TheaterAlmost every device you have came with a remote control, some even are called Universal Remote Controls.  But every device, HDTV, or Home Theater component has special features and functions, not supported by the generic Universal Remotes, especially if you want "One Button" control of several devices at once.  For these you need Advanced Remote Controls, that not only control everything, but reduce it all down to One Button tasks that even a Cave Man could operate! 

    Click Here for Advanced Remote Controls.
     
  • GOT HELP? GET AN INSTALLATION & SETUP SERVICE
    Expert Certified Installation & Setup Help!With some of today's HDTV and Home Theater systems, you may want to consider getting expert help from certified technicians that can quickly install your HDTV on your wall, hide the cables and wires, balance the display settings and the 7.1 surround sound, for the maximum in sound and picture quality.  You can still tell your friends and family that you did it, it will just be our secret! 

    Click Here for expert installation services available when YOU want!
     
  • GET A GUARANTEED BUYBACK FOR YOUR HDTV
    Guaranteed Buyback For Your HDTVAnother way to protect your investment, given the changing pace of technology, is to add a Guaranteed Buyback to your HDTV purchase.  This will guaranty the trade-in value of your HDTV a year or two in the future, when you will be ready to upgrade to the latest technology. 

    Click Here to view Guaranteed Buyback options.

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HDTV logo icon
EDTV logo
SDTV logo
A Quick Guide To TV Definition Terms

HDTV -
(High Definition) television monitors reveal either 720 progressive (720p), or a minimum of 1080 interlaced lines, known as 1080i. An HDTV will show 540 lines at a time. These resolutions create extraordinarily sharp, lifelike images as well as the truest and most vivid colors ever seen on a television screen.
EDTV -
stands for Enhanced Definition Television. EDTV monitors display at least 480 progressive lines (480p). Because EDTV shows more lines simultaneously than SDTV, its pictures are sharper, richer and more realistic.
SDTV - Standard Definition TV is what’s rapidly becoming old-fashioned television. Although SDTV offers a decent picture we’ve grown accustomed to, it features up to 480 interlaced lines (480i), but can show only 240 of them at any given time. Although SDTV produces a sharp picture and good color, its performance is dramatically inferior to HDTV or EDTV.
For More Information - Visit Our Guide To Plasma & LCD TVs

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HDMI logo How Compatible Is HDMI?
HDMI is fully backward compatible with PCs, displays and consumer electronics devices incorporating the Digital Visual Interface (DVI) standard. Both HDMI and DVI were pioneered by Silicon Image and are based on TMDS®, Silicon Image's powerful, high-speed, serial link technology. HDMI supports standard, enhanced, or high-definition video, plus multi-channel digital audio on a single cable. It transmits all ATSC HDTV standards and supports 8-channel digital audio, and with 5 Gbps of bandwidth, HDMI can accommodate future enhancements and requirements. Because HDMI was designed specifically for consumer electronics applications, it offers an array of additional consumer enhancements. As digital content can manifest itself in a variety of sizes, resolutions and formats, HDMI-enabled systems will automatically configure to display content in the most effective format. In addition, if implemented in a specific device, HDMI enables a single remote point and click, allowing manufacturers to deliver home theater systems that automatically configure from a single command from a remote control -- turning on or off the components necessary to view a DVD, listen to a CD, or watch cable or satellite TV.

What is the difference between HDMI 1.3 and HDMI 1.3a, or 1.3b?
For consumers, there is no difference between HDMI version 1.3 and 1.3a or 1.3b. These minor revisions to the specification typically relate to manufacturing or testing issues and do not impact features or functionality in a specific product. In addition, HDMI Licensing, LLC is actively working with manufacturers to reduce confusion for consumers by de-emphasizing version numbers and focusing instead on product features and functionality.

How can I identify which HDMI products support a specific feature, such as DVD Audio or Deep Color?
The key for consumers to remember is that HDMI has consistently enabled a variety of the most innovative new technologies (whether they are DVD Audio, SACD, 1080p/60, etc.). However, in many cases, it is up to each manufacturer to choose which features to implement in any given product. The manufacturer can choose the mix of features that makes sense for its customers and products. So, customers must choose devices that have the features that they want (instead of focusing on which version of HDMI is implemented by the device.). Consumers interested in confirming whether a particular consumer electronics product supports DVD-Audio or any other feature over HDMI are urged to review users’ manuals and product reviews, or check with manufacturers directly.

What Is Firmware Upgradeable?
Many of today's electronics product are designed for today's standards.  Yet like personal computers, they have advanced capabilities that will let them be upgraded for use with new technologies and standards.  The ability to upgrade the firmware of an electronics product allows you to extend the useful lifespan of the device you purchase, and be able to expect support for many (if not all) of the emerging new standards.

What is the difference between Active HDMI and Passive HDMI?
There is no active or passive HDMI in the HDMI specification. These terms apply to cables. Active cables have built-in electronics to enable long cable runs, and typically these cables require a power supply. These cables use active electronics to help push the signal farther than typical passive cables.

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Diagram of a VESA standard mounting bracket for flat panel displays What Is A VESA Mount?
A VESA mount is one that has been designed to be compatible with the Flat Display Mounting Interface (FDMI) Standard.  The standard defines all aspects of the mount dimensions and characteristics, to assure full compatibility between compliant TV manufacturers and the manufacturers of compliant or certified mounting hardware.

Remember, if you are looking to mount your monitor or TV on a VESA compatible mount or stand, check the individual product specificiations to make sure it is a VESA Mount compatible device!

 

Click Here For Our Flat Panel TV & Monitor Mounts »

Who Is VESA?
VESA logoVESA is an organization that supports and sets industry-wide interface standards for the PC, workstation, and consumer electronics industries. VESA promotes and develops timely, relevant, open standards for the display and display interface industry, ensuring interoperability and encouraging innovation and market growth. 
Click Here To Learn More About VESA »

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viewing angle diagram About HDTV Viewing Angles
The Viewing Angle of any TV is an important specification.  The wider the viewing angle, the more enjoyable your experience.  Viewing angles above 150° means you can view your TV from a reasonable range - from the front and off to the sides.  However, viewing angles above 170° are best!  Many of today's Plasma and LCD HDTVs offer viewing angles of 178°, and their images do not suffer from degradation at very high viewing angles.   LCD TVs were originally designed for a one user experience, as a computer monitor, but the technology has kept pace with the demands for ever increasing viewing angles, and most offer excellent viewing experiences.  Between LCD and Plasma; Plasma TVs have the advantage, but by a small margin.

Diagram showing the maximum viewing ngle for standard and wide-angle viewing respectively

Viewing angles are not an issue with projectors because the light source is coming from in front of the screen, and not from behind. However, the surface on which you project (screen or wall surface) may have a slight impact on viewing angles, so it is important to choose the best screen possible.

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LCD Monitor & TV Cleaning Tips
Technology Knowledge, Information, and Resources: Technology News, Information Articles, Product Manuals, How To Guides, Brochures and Fact Sheets, Computer Glossary, and Technical Encyclopedia

TechTip: Cleaning Your LCD Monitor or TV
Now that you have your new LCD Monitor or Widescreen TV, it is important to use the right products to clean it.  The wrong cleaner can damage the surface of your display.  However, there are many new cleaning products on the market designed especially for LCD displays. We recommend using a soft, lint-free cloth and a special LCD cleaner.  (You can also use a cleaner that contains any of the following:  Water, Vinegar (mixed with water), or Isopropyl alcohol).  BUT Do Not Use cleaners that contain any of the following agents: Acetone, Ethyl alcohol, Ethyl acid, Ammonia, Methyl chloride!  Important: Do not spray any liquids directly on the LCD screen. Always apply the solution to your cloth first, not directly to the parts you are cleaning. Always use a soft cotton cloth. Some materials, such as paper towels or old rags can cause scratches and damage the LCD screen.
CLICK HERE FOR OUR SPECIAL LCD CLEANING PRODUCTS »

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Icon for LCD monitor response rates LCD Technology: Response Time - Enabling crisp full-motion video
With the recent widespread use of PC and online games, and PCs equipped with DVD drives give users more opportunities to see moving images such as those in 3D games or action movies on screen. This increase in motion picture content means computer monitors must be able to display not only still images, but moving ones as well. Manufacturers and IT publications often cite a fast response time as an indication that a display can play videos or games with little or no blurring. Hence, we would like to share with you what response time is, and how helpful it is in determining how well an LCD display (TV or Monitor) can portray moving images.  Click here for our Guide To LCD Response Times »

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