Teräväpiirtotekniikka

Teräväpiirtotekniikka, commonly known as HD (High Definition), refers to a set of video display resolutions that are significantly higher than traditional standard-definition television (SDTV). The most common HD resolutions are 720p and 1080p. The "p" in these resolutions stands for progressive scan, meaning each frame is displayed as a complete picture in a single pass. This contrasts with interlaced scanning (denoted by "i"), where odd and even lines of the image are displayed alternately, which can sometimes lead to motion artifacts.

The increased pixel count in HD compared to SD provides a much sharper and more detailed image. For instance, 720p resolution has 1,280 pixels horizontally and 720 pixels vertically, totaling approximately one million pixels. 1080p resolution offers 1,920 pixels horizontally and 1,080 pixels vertically, resulting in over two million pixels. This higher pixel density allows for finer details, clearer text, and a more immersive viewing experience, especially on larger screens.

The adoption of teräväpiirtotekniikka has revolutionized television broadcasting, home entertainment, and digital media. It became the standard for digital television broadcasting and is widely used in Blu-ray discs, video streaming services, and video games. The transition from SD to HD required upgrades in cameras, displays, and transmission infrastructure, but the improved visual quality has made it a worthwhile advancement for consumers and content creators alike.