lähetysväriä

Lähetysväriä refers to the colors used in the visual representation of broadcast television signals. These colors are part of the video signal's chroma component, which carries information about hue and saturation. In analog television systems, such as NTSC, PAL, and SECAM, the chroma information is modulated onto a subcarrier frequency and combined with the luminance (brightness) signal to form the composite video signal. The specific color space and encoding methods used determine how these colors are represented and transmitted.

Digital television, on the other hand, digitizes the video signal, including its color components, at various stages. The concept of "lähetysväriä" in digital broadcasting relates to the color subsampling formats and color spaces employed. Common color subsampling formats include 4:4:4, 4:2:2, and 4:2:0, which define the resolution at which the chroma information is sampled relative to the luminance. Different color spaces, such as Rec. 601, Rec. 709, and Rec. 2020, are used to define the range and primaries of the colors that can be represented. The choice of color space and subsampling affects the fidelity and quality of the displayed image. Understanding lähetysväriä is crucial for ensuring accurate color reproduction across broadcasting equipment and display devices.