What is rec 709 nedir?

Rec 709 is a standard for high-definition television (HDTV) that was developed by the International Telecommunication Union (ITU). It defines the color space that is used in HDTV broadcasting, video production, and post-production. Specifically, Rec 709 specifies the chromaticity coordinates for the primary and secondary colors that are used in HDTV, as well as the gamma curve that is used for encoding luminance values. It is often referred to as "BT.709" because it was originally introduced as ITU Recommendation BT.709. Rec 709 has been widely adopted in the broadcasting and video production industry, but has since been supplemented by more advanced standards such as Rec 2020 for ultra-high-definition (UHD) video.