Which resolution is considered HD?

The resolution that is considered HD is 1280 x 720, which is often referred to as "720p." This resolution was one of the first to be recognized as high definition, providing a significant improvement in clarity and detail compared to standard definition resolutions such as 640 x 480 (VGA).

720p means that the image has a vertical resolution of 720 pixels and a horizontal resolution of 1280 pixels, making it suitable for various media forms, including streaming video and television broadcasts. It delivers a better viewing experience than lower resolutions, allowing for a more detailed and clearer picture.

In contrast, 1920 x 1080 is referred to as "Full HD" and provides even higher clarity. The resolution of 2560 x 1440 is classified as "Quad HD," which is higher than both standard HD and Full HD. Therefore, while these other resolutions are associated with high-definition displays, only 1280 x 720 is categorized as the original HD resolution.