verscan. Instead, they should be displayed using either an exact match between the display area and the cropping rectangle, or using underscan. As used in this paragraph, the term "overscan" refers to display processes in which some parts near the borders of the cropped decoded pictures are not visible in the display area. The term "underscan" describes display processes in which the entire cropped decoded pictures are visible in the display area, but they do not cover the entire display area. For display processes that neither use overscan nor underscan, the display area exactly matches the area of the cropped decoded pictures. NOTE 2 - For example, overscan_appropriate_flag equal to 1 might be used for entertainment television programming, or for a live view of people in a videoconference, and overscan_appropriate_flag equal to 0 might be used for computer screen capture or security camera content. video_signal_type_present_flag equal to 1 specifies that video_format, video_full_range_flag and colour_description_present_flag are present. video_signal_type_present_flag equal to 0, specify that video_format, video_full_range_flag and colour_description_present_flagare not present. video format indicates the representation of the pictures as specified in Table E-2, before being coded in accordance with this Recommendation | International Standard. When the video_format syntax element is not present, video_format value shall be inferred to be equal to 5. Table E-2 - Meaning of video_format video_format Meaning Component SECAM Unspecified video format Reserved Reserved video_full_range_flag indicates the black level and range of the luma and chroma signals as derived from E'y, E'PB, and E'B real-valued component signals. When the video_full_range_flag : syntax element is not present, the value of video_full_range_flag shall be inferred to be equal to 0. colour_description_present_flag equal to 1 specifies that colour_primaries, transfer_characteristics and natrix_coefficients are present. colour_description_present_