HDTV

High Definition Television HDTV is not like any TV you are likely to have experienced before. It generates the most life-like images you will have ever seen on the small screen, with colour and clarity that is totally superior in every way". Not only will you get much better pictures, you also get far better sound quality.

All HDTV programmes will offer superior CD-quality sound, and HDTV sets with 5.1 Dolby digital surround-sound will be able to take full advantage of this, thus offering the audience a true home-cinema experience. Other key features are that the Video is fed digitally from the receiver box to screen and you will no longer get "flaring" on fast moving action.

Televisions in Europe today display 576-625 lines, but HD video increases this line count and so improves the picture quality. to either 720 or 1080 (depending which standard is selected by the broadcaster).

Satellite with the BBC in the UK plan to offer HD content to viewers soon, while the BBC has plans to produce all of its content in HD by 2010. In fact in 20 years from now all of Europe will broadcast television only in High Definition. Market research already suggests that more than 4.5 million households in Europe will switch over to HDTV as early as 2008.

Many people will be aware that some satellite providers began broadcasting in HD in 2006. Freesat's high definition service will use two new formats. The first 1080i increases the number of rows in the picture to 1080 - over 500 more than a standard PAL picture and is interlaced. The other, the 720p, has 720 rows but this time they are progressively scanned. This means that every row of pixels is shown in every frame.

Some FAQ about HDTV:

How does HDTV work?

HDTV gives viewers vivid clear high-resolution images integrated with Dolby Digital 5.1 channel surround sound - creating a truly new viewing experience never seen before on domestic television sets. HDTV reproduces cinema-quality viewing by digitising TV programming, allowing it to be transmitted and received in the same way that a DVD player can reproduce films with cinema-screen special effects.

Why is HDTV better?

Better Quality Picture: Programmes that are filmed in HD offer a far superior picture quality, with vivid rich colours, razor-sharp images and greater levels of detail. To understand how this is achieved it is worth understanding where we are now. At present, all television images are made up of pixels going across the screen and scan lines going down. Currently British TV is transmitted using a format called PAL. A PAL picture displays 576 visible rows of pixels on the screen and these are interlaced. This means the whole picture is not displayed in one screen but instead all the odd rows are shown first then all the even rows. That means that the complete picture is only created after every second frame. HDTV's picture boosts the vertical lines (lines the TV screen is composed of) from the standard 576 to 1080 - nearly doubling the amount of lines on-screen. To truly receive the full impact, programmes need to be broadcasted in this format and the viewer needs to have receive the programme via a HDTV set (or HDTV-enabled set).

What else is better about HDTV?

Better Screen Size: Most televisions in homes today were manufactured in a 4 by 3 aspect ratio. All HDTV signals are sent in a 16 by 9 aspect ratio. This gives the viewer a fuller picture as it works in a similar way to your eye, and is therefore a more compelling visual experience. Currently most new television screens have a 16:9 screen.

How do I make the right choice?

When choosing an HDTV look out for televisions which are described as having all the features listed below, as this will ensure that your TV is fully capable of displaying HDTV. Please note: HD is only available on TVs that are highlighted as HD or HD ready and have to meet stringent standards to advertise under that name.

1) An XGA screen with a minimum resolution of 720 horizontal lines

2) HDMI or DVI connection supporting HDCP (content protection) which disables piracy

3) Component video input (YPbPr) accepting 720P & 1080i input.