I. Introduction
With the development of large-screen display production technology and the development of broadcasting communication technology, high-quality ultra-high definition (UHD) contents are spreading to home beyond high definition (HD). The UHDTV service is characterized not only by increasing the resolution and frame rate, but also by implementing technologies that pursue color reproduction and faithful content reproduction. In recent years, interest in HDR and WCG-supporting technologies has been increasing, and related research and standardization are actively being carried out to faithfully reproduce the contents and to feel the same reality as the original content.