Standard Definition (SD)
Standard Definition (SD) video refers to a video format that has a lower resolution compared to High Definition (HD) video. It typically has a resolution of 480i or 576i, with an aspect ratio of 4:3. SD videos are commonly used in older television sets, DVDs, and older video streaming platforms.
SD videos have a lower pixel count, resulting in less sharpness and detail compared to HD videos. They also have a lower bandwidth requirement, making them easier to transmit over networks with limited capacity.
With the advent of HD and Ultra HD (4K) video formats, SD videos are becoming less common. However, they still hold relevance in certain applications where lower resolution is acceptable or preferred.