Patent ID: 9712781
Date: 2017-07-18
CPC Classifications: H04N

Claim:
1. An apparatus for receiving an UHD (ultra high definition) broadcast signal, comprising: a receiving unit receiving the UHD broadcast signal including an UHD broadcast content and high dynamic range metadata indicating luminance information represented in the UHD broadcast content and transformation information for transforming the UHD broadcast content to fit on a display of a receiver, wherein the high dynamic range metadata includes maximum luminance information indicating a maximum luminance value represented in the UHD broadcast content, minimum luminance information indicating a minimum luminance value represented in the UHD broadcast content, essential maximum luminance information indicating a maximum luminance value of an essential dynamic range which is represented essentially to represent the UHD broadcast content and essential minimum luminance information indicating a minimum luminance value of an essential dynamic range which is represented essentially to represent the UHD broadcast content; a decoder configured to decode the received UHD broadcast content; a dividing unit configured to classify the display of the receiver into a high dynamic range display, a mid dynamic range display and a low dynamic range display using the maximum luminance information, the essential maximum luminance information, the essential minimum luminance information and luminance values of the display of the receiver; a control unit configured to transform the UHD broadcast content when the display of the receiver is classified into the mid dynamic range display or the low dynamic range display, wherein the control unit divides an entire dynamic range of the UHD broadcast content into plural regions using the maximum luminance information, the minimum luminance information, the essential maximum luminance information and the essential minimum luminance information, and transforms the UHD broadcast content according to different transformation curves applied to each of the plural regions using the transformation information; and a play unit configured to play the UHD broadcast content.