What is the Difference Between SDTV & HDTV?

HDTV (high definition television) and SDTV (standard definition television) are both television formats that you view on your television, either via cable or over-the-air through an antenna.

HDTV sets can display both HDTV and SDTV signals, but SDTV television sets can only display SDTV signals.

Defining Standard Definition Television

SDTV formats differ around the world, but the basic picture resolution in North America is 720x480 pixels, in a 4:3 ratio.

SDTV signals are usually broadcast interlaced, which means the picture is shown in alternating lines. This provides a better quality picture for programs with a lot of fast motion on-screen, such as an action movie or a sports game.

Defining High Definition Television

HDTV is an international format that provides a much higher-quality picture.

HDTV can be 1280x720 pixels or 1920x1080 pixels in a 16:9 ratio (known as "widescreen").

HDTV signals are usually broadcast in progressive format, which means all the lines are sent to the screen at the same time. This provides a more 'film-like' viewing picture.

HDTV vs SDTV

HDTV television sets are more expensive than SDTV sets, but they are coming down in price.

HDTV sets have larger screens and consume more power than SDTVs.

Considerations

Most people will only notice the benefits of an HDTV set on larger televisions (27" screens or bigger). On smaller screens, it is difficult to notice the difference in resolution.

HDTVs now come with integrated tuners that allow you to receive HDTV signals in your home.

What about HD movies?

Movies on Blu-ray or HD-DVD discs are encoded at HDTV resolution. You will need an HDTV and an HDMI or component video cable connection between your player and your television to watch them at their highest quality,

References

• Use your viewing distance to determine whether you need an HDTV or SDTV