High-definition, or HD, video refers to a digital video with a minimum resolution of 1280 by 720 pixels. In video technology, it is considered as third generation.Know More
The first generation of video technology started with analog video before proceeding to standard definition, or SD, digital video. HD video is bigger in file size, screen size and resolution compared to the other two. It is not based on PAL or ASTC standard, unlike the other two.
There are three main types of HD video, 720p, 1080p and 1080i. The letter "i" stands for interlaced frame while "p" stands for progressive frame. Both 1080p and 1080i have a resolution of 1920 by 1080, while 720p has a resolution of 1280 by 720.Learn more about Television & Video
How the pictures on a television are made depends on what kind of technology it uses, but they all take advantage of the human brain's capacity to assemble a coherent scene out of tiny colored dots called pixels. The three most common technologies used to transmit these pixels are the cathode ray tube, liquid crystal display and plasma display, according to HowStuffWorks.Full Answer >
Plasma TVs can be distinguished primarily by their resolution, brightness and integrated features. According to PC Magazine, with pixelated-display devices, like plasma screens, resolution is essentially a measure of the number of picture elements contained in the screen's area. The higher the pixel count, the finer the details the screen can display.Full Answer >
Pixels per inch, a measurement of pixel density, depends on the resolution of a document or device. The average PPI is about 72 dots per inch. The input resolution can be measured by pixels per inch (PPI), and a good photograph usually requires 300 DPI.Full Answer >
Depending on required resolution, the maximum length of a VGA cable varies between 30 meters for lower resolutions to only 7.5 meters for higher resolutions. The signal that travels through a VGA cable is analog, which degrades and fades as it travels longer distances.Full Answer >