When it comes to video quality, high definition (HD) has become the standard for most consumers. But what exactly does HD mean, and how do you know if the video you’re watching is in HD?
What is HD?
HD stands for high definition, which refers to a higher resolution video format than standard definition (SD). HD videos have more pixels, or tiny dots that make up the image, resulting in sharper and clearer visuals.
Types of HD
There are several types of HD resolutions, including:
- 720p (1280 x 720 pixels)
- 1080i (1920 x 1080 pixels)
- 1080p (1920 x 1080 pixels)
- 4K Ultra HD (3840×2160 pixels)
720p is the lowest form of HD. It has a resolution of 1280 x 720 pixels and is often used for streaming and online videos. While it may not be as sharp as other HD resolutions, it still provides a significant improvement over SD.
1080i has a resolution of 1920 x 1080 pixels and is often used for live television broadcasts. The “i” stands for interlaced, which means that the image is made up of alternating lines that are displayed one after another.
1080p also has a resolution of 1920 x 1080 pixels but differs from 1080i in that it’s progressive scan. This means that each frame of the video is displayed sequentially, resulting in smoother motion and sharper images.
4K Ultra HD
4K Ultra HD has a resolution of 3840×2160 pixels and is the highest form of HD currently available. It provides four times the resolution of 1080p, resulting in incredibly sharp and detailed images.
How to know if a video is in HD?
Most streaming services and video players will display the video quality next to the playback controls. You can also check the video’s settings or properties to see what resolution it’s in.
In summary, HD refers to a higher resolution video format than SD, with several types of HD resolutions available, including 720p, 1080i, 1080p, and 4K Ultra HD. To know if a video is in HD, check the video quality displayed next to the playback controls or check the video’s settings or properties.