Mikael R asked:




Prices of HDTV sets are falling rapidly and the experts anticipate that they continue to drop over the next years. Because of this there is a lot of interest in all of the types of TV technologies available right now.

If you are shopping around for a TV right now, you can choose among a large variety of flat screen technologies including Plasma screens and LCD screens. Each technology has its own advantages over the other.

Why choose Plasma?
Plasma screen TV's technology is based on exotic gases that can glow in different colors when different amounts of electric current are passed through them. For every pixel you seed in the Plasma screen there is a small pocket of gas that can be excited individually to glow at different wavelengths.

The result is an incredible range of colors that quickly reacts to changes of the images. Plasma screens re often easier to make in larger sizes than LCD screens and they are better at displaying fast action without blurring. However the do have a number of disadvantages. First of all the Plasma screens consume more than twice the amount of electricity that LCD screens do. Secondly Plasma screens aren't bright enough to function well in higher light levels and their brightness fades with time and use and third they also tend to produce and annoying buzzing sound if they are operating at altitudes in excess of six thousand feet.

Why choose LCD?
Differently than the Plasma screens the LCD screens are based on a special type of crystals that react to electrical current by changing shape (not changing color like the gasses in a Plasma screen). In a normal LCD TV screen, the crystals are arranged in a grid pattern and they are supported by a transparent film transistor. A transparent film transistor applies the current to each individual crystal in the screen and, depending on the voltage that is applied to the individual crystal it will change its shape in various ways to block out light coming from a fluorescent lamp behind it.

The crystals will not only block out light completely to make black, but they will also block out different wavelengths of light to let through different colors. Every crystal represents one pixel on the screen. Compared to Plasma screens the LCD screens have the advantages of being extremely energy efficient and they render a great "crystal clear" picture in a variety of light levels, and lend themselves well to displaying output from computers.

The disadvantages of the LCD displays are that they are slightly blurring when displaying fast movement due to the time that the crystals need to change shape. Secondly the LCD screens are not that good at showing very deep shades of black due to the amount of energy that the crystals need to block out the light completely. Luckily both of these problems are almost unnoticeable as the technology has advanced.

In conclusion
There is not right or wrong choice when it comes to picking either a LCD or a Plasma screen. It all depends on the size your want, the contrast of colors you need and the things (watching movies or using as a computer screen) that you are planning using the new screen for. Always be sure to test the screens before you buy them. You might even be lucky to be able to borrow a screen for a test in your own living room to make sure that it is the right choice.

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Nash Trout asked:




There are lots of ways nowadays to watch regular TV programs on PC, but what provides High Definition TV?

First off, you will need a flat screen monitor on your PC that has HDTV-quality resolution. Most of the PC manufacturers offer discount on package when you buy the new PC model with dual-core processors and with HDTV-ready flat screen. You can be better-off avail of this package.

Otherwise, using your not-so-old PC, just buy a reasonable size flat screen with HDTV-quality resolution. You will connect the PC's output to your HDTV-ready flat screen. There are two interfaces available that you can choose from: HDMI (High-Definition Multimedia Interface) cable and DVI (Digital Visual Interface) cable. Be sure to choose the right cable when connecting to your flat screen. The most common one is the DVI interface.

Above is to output the signal from your PC to flat-screen display with high-definition quality.

Secondly, you will need a source of HDTV programs - this is the input. There are two ways to get digital-quality TV sources:

1. Using an HDTV Tuner Card and subscription to HDTV cable and satellite services. The tuner cards are available on your local PC shops that you can install to your PC through USB (Universal Serial Bus) or PCI (Peripheral Component Interconnect) interface. Your local cable service provider will provide the HDTV-ready channels for a monthly subscription.

2. Using PC software to access HDTV-channels through high-speed internet connection. Very important to have a broadband connection with at least 2MB download speed. This is more practical and easy option to watch HDTV channels instantly. Just need the software to access the channels to be installed on your PC.

That's about it. It's not difficult to setup, and it's really worthwhile, especially when you are already watching high-quality TV and at the same time checking your e-mail or chatting online, it's cool!

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Brian Bradshaw asked:




The technologies of television and computers are converging. With HDTV, the signal is digital, and the barriers to integration are minimal. Many customers of a high-def video system want to take advantage of the associated benefits, including high definition audio, and merging their computer systems with the theater.

The primary forces impacting this trend include internet capacity constraints caused by video download demand, property rights of the movie producers (and the technical solutions), and an analysis of the who is likely to reap the financial windfall from it all.

Do We have the Internet Bandwidth to Support Downloaded Movies?

According to Google, the popularity of video downloads, especially High-Def downloads, could overwhelm internet bandwidth capacity. Services such as YouTube (owned by Google) are problematic, and new developments could create even more problems.

Joshua Danovitz, general manager and vice-president international for TiVo, said the issue of download limits differs in each country. In the United States and Asia, where bandwidth capacity is still available, users have few constraints (though not truly unlimited), while other countries, including Canada, ISPs are restricting users to some degree. The problem will only get worse with the increased popularity of video downloads. Currently, more than half of internet bandwidth utilization in the United States is peer to peer, and most of that is video download.

Time Warner said that it was going to start testing a new rate plan in Beaumont (Texas) that would limit the amount of bandwidth each customer can use each month before additional charges applied. New plans would offer between 5 gigabytes and 40 gigabytes of download a month. The top plan would cost roughly the same as the company's highest-speed service ($50 and $60 a month).

Time Warner wants to test bandwidth limits to crack down on a minority of customers who are heavy downloaders. Only five percent of Time Warner's customers use over half of its total bandwidth.

Bell Canada has imposed bandwidth limits on its customers. Bell Canada charges as much as $7.50 for each gigabyte when customers exceed the 30-gigabyte limit on a plan that costs about $30 a month. Since the average high-definition movie is 4 gigabytes to 5 gigabytes, that would mean a charge of at least $30 a download for customers on a plan like that who were over their limit.

On more expensive plans, the over-limit charges at Bell Canada are as low as $1 a gigabyte. That would represent a $4 to $5 charge for an HD movie for people over their monthly limits. Standard-definition movies are typically 1 gigabyte to 2 gigabytes.

A lot of the movies are not downloaded from authorized vendors.

Property Control (reference: Downloaded Music)

One fifth of U.S. citizens have pirated a major film and two thirds of this group have downloaded a film at least monthly. 80% of overall movie downloaders use unauthorized services to get their movies for free, as opposed to using a legal solution. The RIAA and MPAA have already resorted to legal action against thousands of U.S. citizens.

If we assume a parallel path with the audio recording industry, then the business implications are huge. MP3 players have now been around for about 10 years. Audio CD sales are down about 15% last year, 20% in 2006. The best estimate is that only about 42% of music acquisitions being paid. NPD (a retail tracking group) estimates that one million consumers "dropped out of the CD buyer market" in 2007, a trend led by teenagers, 48% of whom did not purchase a single CD in 2007.

Thomson is exploring methods for preventing bootlegging by the covert camcorder user. The company's technique involves inserting "artifacts" (extra frames, flashes of light, pixelated grid patterns, etc.) into the movie before it's shipped to theaters. The idea is to mark a camcorder recording without degrading the images moviegoers see.

The artifacts exploit the differences in the way a human brain and a camcorder receive images. In the technique that's furthest along, extra frames with the words like "Pirated Copy, You Are Scum" are inserted into the frame. These warning words appear at a frequency too fast for the human brain to process, but they will appear in a camcorder recording.

From a technical standpoint, it is probably impossible to completely prevent users from making copies of the media they purchase, as long as a "writer" is available that can write to blank media. The basic technical fact is that all types of media require a player. The player has to be able to read the media in order to display it to a human, then a player could be built that first reads the media, and then writes out an exact copy of what was read.

In practice, almost-perfect copies can typically be made by tapping into the analog output of a player (e.g. the speaker output or headphone jacks) and, once redigitized into an unprotected form, duplicated.

Since these basic technical facts exist, it follows that a determined individual will definitely succeed in copying any media, given enough time and resources. Media publishers understand this; copy protection is not intended to stop professional operations involved in the unauthorized mass duplication of media, but rather to stop "casual copying".

Copying of media which is downloaded (rather than being mass-duplicated as with physical media) can be inexpensively customized for each download, and thus restricted more effectively. They can be encrypted in a fashion which is unique for each user's computer, and the decryption system can be made tamper-resistant.

Publishers of music and movies have turned to encryption to make copying more difficult. CSS is a form of copy protection that uses 40-bit encryption. Copies will not be playable since they will be missing the key, which is not writable on DVD-R or DVD-RW discs. The work is encrypted using a key only included in the firmware of authorized players, which allow only legitimate uses of the work (usually restricted forms of playback, but no conversion or modification).

The Digital Millennium Copyright Act would make it illegal to distribute unauthorized players was supposed to eliminate the possibility of building a DVD copier. However, encryption schemes designed for mass-market standardized media such as DVD suffer from the fundamental weakness that once implemented, they can never be changed without breaking the standard. Manufacturers have been prevented from enhancing their DRM technology until recently, with the release of next-generation media such as HD DVD and Blu-ray Disc. This period represents more than enough time for the encryption scheme to be defeated by determined attackers. For example, the CSS encryption system used on DVD Video was broken within three years of its market release in November 1996 (see DeCSS), but has not been changed since, because doing so would immediately render all DVD players sold prior to the change incapable of reading new DVDs. This would not only provoke a furious backlash amongst consumers. More recent DVDs have attempted to augment CSS with additional protection schemes. Most modern schemes like ARccOS Protection use tricks of the DVD format in an attempt to trip up pirating programs, though it is noted that any scheme must stay within the bounds of the DVD Video format, limiting the possible avenues of protection and making it easier for hackers to learn the details of the scheme and find ways around it.

HD DVD and Blu-ray Disc, attempt to address this issue. Both formats employ the Advanced Access Content System (AACS), which provides for several hundred different encryption keys, each of which can be invalidated should one of the keys be compromised. Revoked keys simply will not appear on recorded discs, rendering the compromised players useless for future titles unless they are updated to fix the issue. For this reason, all HD-DVD players and some Blu-ray players include an ethernet port, so that they can download updates. Blu-ray Disc goes one step further with a separate technique called BD+, a virtual machine that can execute code included on discs to verify, authorize, revoke, and update players as the need arises. Since the protection program is on the disc rather than the player, this allows for updating protection programs within BD's working life by simply having updated programs included on newer discs.

The Rich Get Richer

Everyone from Apple and Microsoft, and smaller companies such as TiVo and Netflix, are marketing their version of the "digital living room". Since the software is the most challenging (read value add) component of these systems, the author believes companies with a track record of success in the software arena are likely to end up on top.

These home theater systems are basically PCs designed to be connected to home theater systems. One benefit is the ability to access and use all your home media files in the living room, on the big screen. These systems have been popular for dire hard enthusiasts, but are only now becoming mainstream.

Microsoft

Windows Media Center (included on premium editions of Windows Vista, Vista Home Premium and Vista Ultimate) is critical in Microsoft's vision of the digital lifestyle that the company aims to push as a standard of entertainment for consumers. This in the context of the intimate connection between the Windows client and Windows Media Center, but also because of Microsoft's strategy focused on connected entertainment.

With the addition of a TV tuner card, Media Center can play back and record TV shows from a High-definition TV, Digital Cable (1080i Premium HDTV), standard antenna, cable, or satellite signal.

Like TiVo, Windows Media Center allows fast-forwarding through commercials of recorded programs. Some users deliberately wait 10-15 minutes to start watching a program in the live buffer so they can fast-forward through the commercials and catch up to "live TV" by the end of the program.

Commercials can be skipped automatically (not supported by Microsoft) by installing external plug-ins like DVRMSToolbox or Lifextender.

The problems that Microsoft Vista has experienced are well documented, but buggy software has never prevented Microsoft from dominating other software applications.

Our Recommendation: use XP MCE until Vista gets the bugs worked out.

Apple

Owners of the Apple TV set-top box are able to rent movies directly from their living rooms and begin watching them within minutes. "It will do for movies what iTunes has done for music," said Michael Gartenberg (JupiterResearch).

Apple will offer about 1,000 movies, 100 of them in high-definition. The new service will also offer movies from all the major studios. That's a big step, Apple has also tried to make Apple TV easier to use.

Apple faces more competition than it did when it launched the iPod. There is Sony, with its PlayStation 3 and Blu-ray disc players, and Comcast, which plans to offer 6,000 movies on demand each month, including more than 3,000 in high-definition.

Even the local Blockbuster has a larger selection of videos for rent than Apple, said John Barrett, director of research at Parks Associates, a market research firm focused on emerging technologies. And instead of worrying about a movie expiring within a day of starting to watch it, as with iTunes, Netflix customers can hang on to movies rented from its service for practically as long as they like, Barret added.

Should Apple's product prove popular, cable providers are likely to start integrating similar features into their set-top boxes.

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Curtis Hoskins asked:




With the popularity of the HDTV, gone are the days when a TV was just used for broadcasting Television and simply connecting your cable box was all you needed to do. All kinds of different gadgets are now being connected to your Television set. Your TV screen provides various functions in your home entertainment as it is used for gaming, watching movies, photos, and it can even be used as a computer monitor.

In order to get the optimal performance out of your HDTV, it usually comes down to how it is connected. Some people become frustrated when dealing with the endless multi-colors rows of inputs and outputs. It can be a daunting task if you do not know which connection to use; not only on your HDTV, but also on the many devices you are connecting such as DVRs, Blu-ray players, cable boxes, sound receivers, and gaming systems. All provide you with many options to use for connecting to your HDTV and make no mistake about it, how your HDTV is connected does make a difference in both image and sound quality.

What ways can you connect?

There are usually 5 ways to connect your HDTV to other devices: HDMI, DVI, Component, S-video and Composite. Some HDTVs may not have all of these connections, however, most newer ones will at least come with HDMI, DVI, and component. So, what exactly are these connections?

HDMI - or High Definition Multimedia Interface is the standard for high definition home theater. It gives you uncompressed 1080p high definition video and up to 7.1 channels of surround sound in one cable.

DVI - Digital Visual Interface was the best option with older HDTVs. It can give you 1080p high definition video, but you will have to use a separate cable for audio.

Component - Component Video splits video signal into three separate signals, two for color, and one for brightness. Highest resolution it can achieve is 720p and 1080i.

S-video - S-Video splits the video signal into two parts, one for color, and one for brightness.

Composite or RCA - Composite has color and brightness delivered over one cable.

Which one is best?

The easy answer to this question is the HDMI cable. With the ease of connecting just one cable you get the best quality in image and sound. HDMI cables have up to 5 Gbps of bandwidth, which is more than enough to carry uncompressed high definition video images and up to 8 channels of 24-bit high definition audio. This limits any affect on video or audio quality, since there is no converting of signals (digital to analog) or any compressed signals. And blu-ray players are all about achieving the highest quality of image and sound possible.

There are four main versions of HDMI that most hardware will have. They are: 1.0, 1.1, 1.2 and 1.3. All versions of HDMI has the capacity to carry HD video up to 1080p.

1.0 - First version of HDMI. Will decode most audio codecs found in DVDs and digital TV signals, as well as Dolby Digital and DTS.

1.1 - This version allowed for 5.1 channels audio, eliminating the need for 6 separate audio RCA cables.

1.2/1.2a - Allows for the use of Super Audio CD (SACD).

1.3/1.3a/1.3b - This version allows for the transmitting of Dolby TrueHD and DTS-HD Audio, which are used with Blu-ray players. This version also increases the bandwidth to 10 Gbps.

The drawback to the HDMI cable is the cost. HDMI cables can run anywhere from $20 to $150. Some argue there is no difference in HDMI cables, no matter what the cost. DVI may be another option for you, with this cable you should be able to get the best high definition, 1080p. However, other cables will be needed for audio. Your best option if purchasing a HDMI cable, is to find a modestly price HDMI cable and work your way up until you find the one that suits you best.

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Rashme Wong asked:




HDTV is getting more and more popular these days as the new High definition TV are the best way to watch really great quality TV and it is far much better than other TV available in the market now. This is because they have a higher number of pixels on the screen than the normal plasma TV has. But in order to get the most from them, you will then need watch some high definition programs. It is not a problem watch such programs these days as there are a lot of them being made now. If you switch from using the common TV to HDTV when watching some good quality HDTV, you will surely notice how big difference it is. You will find that the whole picture is much more clearer to watch and easier to control.

In fact, the image quality on the high definition TV is always much better than it is on an LCD TV as they have a much better sharpness and contrast. Therefore, the quality of the image is better. Plasma TV also let you have the same view when you view it. It is similar in the picture when comparing with a traditional TV and even an LCD TV when it is viewed from the side. But an HDTV looks almost the same from each area so you can always get a good view on it.

Another great advantage of watching with plasma TV is that they are really flat that you can even put them on the wall. It is really a great way to watch your favourite programs as if you are staying in the theater as well as it saves a lot of space for you. In case you already have a good 42" HD TV, then you should make sure that your dvd player can also play high definition dvd's as not all of the dvd players can do that. Also, if you have an older model, then you might have to buy a new one to get the best view for your new HDTV.

In short, HDTV is the latest thing and are well worth your extra spending. When you see the screen at the first time, you will then understand that the high definition technology really makes a big difference to the quality of the image and it makes it well worthwhile. But you do not need to buy them just form retailer shop. If you search around online, you can find some really good deals that can save a lot and get the best one for yourself.

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David Z asked:




Are you looking to buy a HDTV? Take a look at our guide to find out what HDTV is about.

1. What does HDTV stand for?

High Definition Television

2. What is HTDV?

It is a new technology and way of filming that has a higher bit depth resolution and gives you a sense or realism while watching the program. Sports are one of the leading industries in high definition programming. To film in HDTV requires a special camera.

3. How can I tell if my TV is HDTV?

It should say it directly on the box or with the model number. EDTV is not HDTV! There is another side aspect most people overlook due to pricing schemes and that is pixel depth. The cheaper plasmas and LCD have lower clarity or pixels. Therefore, to buy a great HDTV, you need to look for higher pixel resolutions.

4. Why Should I Buy One?

Because you will never go back, it is like night and day. A true HDTV and HD Television Program are ten times better picture clarity than at the movie theaters. HDTV's also have lots of additional features that standard old televisions do not. They usually have ports for connecting to computers to act as a computer monitor, split screen, more aspect ratios for watching in different formats. Since the cameras have have been improved to record HD programs, they also went ahead and improved the sound recording system and so you have even higher quality sound to go along with the improved picture.

HDTV has been out for a few years now and therefore there are less bugs and defunct screens. In addition, the price has drastically fallen, for around $2000 you can buy an excellent 32-42¡± screen with high resolution and all the extra options.

5. Is there anything else I should know when buying a HDTV screen?

Yes, the cables can be very expensive. HDMI cables, RGB, and others that maximize the picture and sound (which are necessary) can cost between $35-$50 each and you need several. It is not necessary to buy name brand cables, so go to places like radio shack and buy the off brand for half the price. In addition, please research whether you should buy an LCD or Plasma screen, because based on you use and room arrangements you will require one or the other.

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Whitney Alen asked:




You know there must be something special about digital television if Scooby-Doo endorses the technology (the Great Dane sold out and did a spot for DIRECTV!). High-Definition Television, also known as HDTV, is a digital television broadcasting system with enhanced resolution and superior qualities to traditional television sets. HDTV and digital television are usually related in a conversation, since HDTV is always digitally broadcast, since it required less bandwidth thanks to video compression.

High-Definition Television can yield a much better-quality image than standard television because of its great number of resolution lines. Digital signals do not have the problems with snowy or pale images, which are direct results of very weak signals or signal interference. Shows broadcasting in HDTV and received on digital-ready receivers, allow for better reception, more realistic image colors and a visual sharpness about 2-5 times greater than standard TV transmission. This is because the gaps between scan lines are much narrower. This means that nature shows, films, sporting events and the like can be photographed on 35 mm film and viewed at home with nearly the same original resolution. (Try watching Coppola's Apocalypse Now Redux the way the director saw it!) Additionally, HDTV systems usually bring along Dolby Digital 5.1 Surround Sound to the media package, allowing TV or movie viewers to hear full surround sound features.

Not only does High-Definition Television boast several advantages over SDTV and other standard systems; but the casual home viewer (primarily used to an ordinary analog-based TV set) also has to factor in the advantages that a digital system brings to the table. (Or dining room, or living room-wherever!) As stated with HDTV, DTV takes up less bandwidth and the bandwidth is also continuously variable, depending on the compression level. Therefore, digital broadcasters can provide more digital channels in the same space, allowing for special features like HDTV, and allow for more interactivity between viewer and network channel. Digital TV also allows for multiplexing capability, which lets viewers tune into more than one program on the same channel. Imagine watching more than one sporting event at the same time and on the same screen! Imagine watching two movies side by side and comparing notes. This is the perfect compromise for analog veterans who love to channel flip. DTV also allows for electronic program guides, additional languages and subtitles.

There is a huge race in the broadcasting industry to offer the largest choice in HD programming. Satellite companies seem to have the edge over cable providers with Direct TV HD leading the pack in the number of high definition channels to choose from. Most providers offer HD receivers or upgrade options to HD DVR boxes.

All in all, nearly everyone-particularly a casual TV viewer who has been watching the Discovery Channel on a small rectangular screen-agrees that DTV, and especially High-Definition TV have superior picture quality, enhanced audio quality and much easier reception than the analog generation ever dreamed.

If you're a casual viewer wondering if the difference between HDTV and regular analog television is worth it, then now is really the best time to switch over-because soon enough, all of your favorite networks will be making the same switch, with or without you. On February 17, 2009, US network television will terminate all full power station terrestrial analog broadcasting in favor of digital broadcasting.

While you could try and request a rebate from the government to receive a converter box with digital tuning, the TV viewer in you surely begs, not just for the status quo, but for hundreds of additional channels-all available in High Definition Television. With all the additional color, sound and interactivity television's simulation of life is one-step closer to the real world.

hdtv

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