“HD ready” is the resolution of the screen, HD ready means the screen can display at a resolution of 1280 * 720p.
Whereas a “Full HD” screen can display at a resolution of 1920 * 1080p.
Want to find out more? Read on…
Understanding different screen resolutions.
“Screen resolution” is used to describe the video quality that the TV screen can show.
To understand resolution first let’s understand,
How does the TV display videos?
Well the TV shows a large number of images at a very fast rate to make a video.
(Generally 25 frames per second)
And each image on the screen is made up of lakhs of tiny dots called as pixels.
Each pixel can display different colors in varying levels of brightness. And the number of pixels the TV screen can show is called the resolution of the screen.
Higher the number of pixels higher will be the screen’s resolution and better will be the video quality. A high resolution thus translates into clear and sharper videos.
image source: Wikipedia
And how do you find out the resolution?
Well, the format used to describe the resolution of a screen is– (the number of pixels shown horizontally) * (number of pixels shown vertically).
So, a screen with (1280 * 720) resolution shows 1280 horizontal pixel lines multiplied by 720 vertical pixel lines or a total of 9,21,600 pixels. Such a screen will commonly be called a screen with resolution of 720p.
As you must have figured out 720 is the number of vertical pixel lines the screen can display.
But saying ‘this TV has a resolution on 720p’ is a bit difficult, so the industry started calling TVs with display resolution of 720p as ‘HD ready’ TVs.
Other most commonly available resolutions and the terms used to describe them are as follows:
720p (1280x720p)— High Definition (HD) or HD ready TV
1080p (1920 x 1080p)— Full HD TV
2160p (3840 x 2160p)— UHD or Ultra HD or 4K
(4K, because it displays 4 times the number of pixels shown by Full HD)
“p” vs “i”
If you notice most of resolution descriptions end with “p”
Or “i” like 720p, 1080i, 1080p, etc.
The “p” in 1080p stands for progressive and “i” in 1080i stands for interlace.
As you know, the TV shows multiple images in a second. In Progressive TVs the entire image is displayed in a single frame.
Whereas, in Interlaced TVs only odd numbered horizontal lines (that form the image) are displayed in one frame and only even numbered horizontal lines are displayed in the next frame. As the frames are shown at a fast speed the interlaced TVs try to trick us into believing we are seeing a complete picture. This results in some lags while watching TV.
So my advice is, stick with 1080p or 720p or anything with p after it.