There are a lot of nonsense talked about HDTV and much of the noise comes
manufacturers and retailers from advertising, which is extreme in some cases
misleading.

One of the areas of greatest confusion is resolution. The resolution is defined as the
Number of pixels - the elements that make up a digital image - an image and is
generally axb, where a quote from the number of pixels on the screen
(Horizontal) and b is the number of pixelsup and down (vertically, also known as
the number of lines). In this article we will explain everything you need to know about
the number of pixels required for HDTV.

HDTV specifications

The HDTV specification provides three different types of HDTV, characterized by the
Number of lines of resolution and give the signal. They are:

1080p (1080 lines, progressive scan)

1080i (1080 lines, interlaced)

720p (720Pixel, progressive)

Each TV can not display at least 720 lines is not “HD-ready and all
Signal less than 720 lines is not an HDTV signal.

Interlaced or progressive?

The “i” and “p” in the HD, see interlaced and progressive scan. The
Analog TV, we have observed for years is interlaced. It simply means that each
Part of the video (of which there are 30 per second for NTSC and 24 per secondPAL)
is divided into two areas. Each field contains alternate lines of the signal (it has the
odd, the other too) and is intended to 1/60th of a 1:48 second (PAL) is displayed.
Because it happens so fast, the brain interprets each frame as a single image.
Progressive scan signals do not have fields, they simply show each frame in its
Parts 1/30th (or 1/24th) of a second. This results in better image quality,
Particularly susceptible to early actionPrograms such as sporting events.

So everyone that can display 720 lines TV is HDTV ready?

No, this is one of the main areas of confusion. The other important element of
specification is that HDTV signals must be widely disseminated, 16:9. This
known as aspect ratio, where “16” refers to the width of the image and “9” on the
Height. In other words, the height of the image 9/16ths of the width.
Some manufacturers promoteTV with a maximum resolution of 1024 x 768 pixels
as HD-ready. This is wrong. Although the total number of vertical pixels
more than the minimum required for HDTV 720, a ratio of 16:9 to it
1280 pixels horizontal photo should show a line HDTV 720. The only
Solution is to squash the image is cut, none satisfactory.
So to properly HDTV Ready, TV takes you toPosting at least
1280 pixels horizontally and vertically at least 720.

Remember to buy at least consider before you, if the resolution of your HDTV is
1280 x 720 pixels and leave the logo on the box.

Tags : Sony KDL-40W5100