What is the resolution of regular TV broadcasts or video sources?
Short Answer: If we equate the visible resolution (viewable area) for SDTV to a pixel per inch measurement that we commonly use to describe HDTV and computer monitors, SDTV is equal to 720 x 480 interlaced lines or simply 480i. Long Answer: Standard Definition TV (SDTV) also known as NTSC (National Television Standards Committee) is the type of TV and video we have been watching since the 1950s. All of your non-HDTV video sources (camcorder, VCR, DVD player, etc.) are NTSC SDTV video sources. SDTV provides a signal that is made up of horizontal lines and not pixels per inch like a computer monitor. For NTSC there are 525 horizontal lines drawn across and down the TV screen that make up each second of video. Half of these 525 lines or 262 lines are drawn across and down the TV screen in the first second of a video frame and another 262 lines are drawn across and down the TV screen in the second second in alternating lines. This process is called Interlacing. In the last century Interlac
