May
24
Filed Under (HDTV) by Bill
hdtv
Kamal asked:


Introduction

HDTV technology was first introduced in the US during the 1990s by a group of electronics companies called the Digital HDTV Grand Alliance. HDTV is capable of "theater-quality" audio because it uses the Dolby Digital (AC-3) format to support "5. HDTV offers a degree of clarity that is much closer to this. HDTV can be recorded to D-VHS (Data-VHS), W-VHS (analog only), to a HDTV-capable digital video recorder (for example DirecTV’s high-definition Digital video recorder, Sky HD’s set-top box, or TiVo’s Series 3 or HD recorders), or an HDTV-ready HTPC. HDTV is just one part of the DTV transition. HDTV is best viewed on a new high-definition television. HDTV requires an HDTV tuner to view and the most detailed HDTV format is 1080i.

Definition

The term "high-definition" can refer to the resolution specifications themselves, or more loosely to media capable of similar sharpness, such as photographic film and digital video. High-definition television (HDTV) potentially offers a much better picture quality than standard television. NTSC system, established in 1941, were high definition only in comparison with previous mechanical and electronic television systems, and NTSC, along with the later European 625-line PAL and SECAMs, is described as standard definition today.

Television

While some early analog HDTV formats were broadcast in Europe and Japan, HDTV is usually broadcast digitally, because digital television (DTV) broadcasting requires much less bandwidth if it uses enough video compression. To get a better picture HDTV televisions require a High Definition (HD) signal. As of 2007, broadcasters may demand, or cable-television operators may elect, to place HD signals in a premium band that requires higher cable fees. HDTV has at least twice the linear resolution of standard-definition television (SDTV), thus allowing much more detail to be shown compared with analog television or regular DVD.

Resolution

It should be noted that while HDTV is more like a theater in quality than conventional television, 35 mm and 70 mm film projectors used in theaters still have the highest resolution and best viewing quality on very large screens. Digital NTSC- and PAL/SECAM-like signals (480i60 and 576i50 respectively) are transmitted at a horizontal resolution of 720 or 704 "pixels". In Australia, the 576p50 format is also considered a HDTV format, as it has doubled temporal resolution though the use of progressive scanning. For example, you can get a 72" projection HDTV that has 1920×1080 resolution from $2500 to $5000 depending on the brand and model.

Satellite

Satellite services and a Cable TV providers are providing an increasing number of HDTV feeds. Satellite-based TV companies, such as Optimum, DirecTV, Sky Digital (In the UK and Ireland) and DishNetwork, offer HDTV to customers as an upgrade. To receive an HDTV broadcast you need either a TV with a built-in HDTV tuner, like this Panasonic plasma HDTV, an HDTV receiver which can pick-up off the air HDTV channels, cable HDTV, or satellite HDTV receiver like Dish Network HDTV and this DirecTV H10 receiver.

Technology

While high definition has become a reality for many consumers, the technical jargon associated with this exiting new technology is causing much confusion. Through the evolution of display technology, a new television has emerged; so totally different, a new TV ‘paragon’ has been created. it doesn’t require a degree in TV Technology.

In addition, lack of enthusiastic co-operation between broadcasters, cable/satellite providers, and manufacturers has injected further confusion for retailers on how to sell HDTV and consumers as what products to buy, how to use them, and to what programs are actually available in HDTV. On the other hand, a very high resolution source may require more bandwidth than is available in order to be transmitted without loss of fidelity.

To watch high definition television or HDTV you will need three things: A Satellite or Cable program subscription to HD Programming; An HDTV Satellite Receiver or Digital Set Top Box; A high definition television set (HDTV). But beyond all argument, HDTV offers the ultimate in TV Picture Quality. We believe you’re interested in what you need to know, to buy and enjoy a Digital-HDTV – NOT, how to build one.



Beitris

hdtv
Michael Hehn asked:


As everyone knows for a fact, today HDTV or high definition television has taken over from DTV or digital television and is the latest in television technology thus requiring programs to be in widescreen format so that you can view the high resolution pictures as well as listen to surround sound and thus get superior ambience and a more theater-like experience right there in your home, which is what HDTV is all about. So, if you have a HDTV at home and need to receive as well as output HDTV signals, you just cannot do so without first having a HDTV tuner.

Receives Signals As ATSC And Converts To HDTV Signals

A HDTV tuner is also referred to as a receiver, decoder and even a set-top box, and it is usual for the HDTV tuner to receive signals in ATSC format which are decoded in HDTV signals so that they are fit to be displayed on a HDTV screen, and it also means that the HDTV tuner will provide your HDTV with aspect ratio of 16:9 as well as picture quality in the range between 720p to 1080i.

In addition, it is also normal that the HDTV tuner is able to receive all HDTV signals which include cable and satellite as well as over-the-air (OTA) broadcasts, and it must also be suitable for receiving any kind of digital VHS recordings. In most instances, the HDTV tuner is used as an external box or it can even is integrated with the HDTV itself and even with a HDTV receiver, and it is generally connected between the television and the antenna. However, should you buy a HDTV that already has a HDTV tuner, then there is no need to use an external HDTV tuner for receiving regular cable channels.

The HDTV tuner is also very handy should you need to view HDTV programs as it can perform the necessary conversion for use even when using an analog television as well as with digital televisions. These tuners are readily available though they come in different prices while an average one would cost you between hundred and four hundred dollars, though the price really will vary from one maker to the other. And, some of the leading makers of such tuners include Sharp and Panasonic, Mitsubishi and Thomson as well as Samsung, and, in addition, it is also possible for you to get your HDTV tuner from any local dealer as too from online stores.

Finally, you can expect different HDTV tuners to come with various features meant to suit different user needs including having program guide displays for each and every channel, self-guided setup as well as interactive program guides. Some of these tuners even come with a hard drive which can record standard TV programs both digital as well as HDTV, and the many features available in these tuners make it possible for you to enjoy a true home theater experience.



Daisie

Jan
14
Filed Under (HDTV) by Bill
hdtv
L Chan asked:


HDTV: Reasons For Getting It

As soon as supporters of HDTV introduced it back in 1998, word spread that people would have a radically new TV viewing experience. With high definition television, you would be watching your favorite TV shows with improved picture quality and hear it through digital surround sound that made you feel as though you were part of the scenes.

HDTV: What Is It?

HDTV surpasses regular analog television technology. With HDTV you’ll notice crisper and clearer images that your older analog television can’t match. With the older analog technology, the television receives wave signals on the air. The quality of the picture is diminished when these signals are converted to the screen. Signals to LCD HDTV or plasma HDTV are sent digitally, without losing the overall quality of the images received.

HDTV: Function and Benefits

The US is phasing out analog broadcasting and replacing it with digital broadcasting. When the deadline arrives in 2009, your analog TV will not work, unless it has a converter. Right now, your analog TV set will still work so you might be wondering why you would want to have an HDTV right now:

The picture quality of HDTV is better and you can see tiny details even on bigger screens.

HDTV multicasting allows stations to broadcast several programs in one line.

Viewers can participate in shows or movies, which have interactive content, such as games or contests.

HDTV will use the entire screen to display its signal, whereas analog sets use only every other pixel line.

You can expect to see all the brilliant colors and images from channels that broadcast HD.

HDTV Problems

Some HDTV models are quite expensive. It’s impossible to get High Definition programming through your older analog television. However, new televisions are built to be able to receive HD signals. If the television you buy doesn’t have a built-in tuner, you’ll need to look at HDTV antennas or HDTV tuners.

Shopping For An HDTV?

It’s best to see HDTV for yourself. By studying HDTV reviews and listening to only good buying advice, you’ll soon be enjoying a new way of watching television you’ve never seen before.

Copyright (c) 2006 by Leroy Chan



Envoy