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ETSI EN 300 743 V1.3.1 (2006-11)
The size and position of this window within the display is defined by the parameters signalled in this display definition segment as display_window_horizontal_position_minimum, display_window_horizontal_position_maximum, display_window_vertical_position_minimum and display_window_vertical_position_maximum. If display_window_flag = 0, the DVB subtitle display set associated with this display_definition_segment is intended to be rendered directly within the display size defined by display_width and display_height. display_width: Specifies the maximum horizontal width of the display in pixels minus 1 assumed by the subtitling stream associated with this display definition segment. The value in this field shall be in the region 0..4095. display_height: Specifies the maximum vertical height of the display in lines minus 1 assumed by the subtitling stream associated with this display definition segment. The value in this field shall be in the region 0..4095. display_window_horizontal_position_minimum: Specifies the left-hand most pixel of this DVB subtitle display set with reference to the left-hand most pixel of the display. display_window_horizontal_position_maximum: Specifies the right-hand most pixel of this DVB subtitle display set with reference to the left-hand most pixel of the display. display_window_vertical_position_minimum: Specifies the upper most line of this DVB subtitle display set with reference to the top line of the display. display_window_vertical_position_maximum: Specifies the bottom line of this DVB subtitle display set with reference to the to the top line of the display. subtitle “window�
image display
display_window_ vertical_position_ minimum
display_height
A DVB Subtitle
display_window_ vertical_position_ maximum
display_window_ horizontal_position_minimum
display_window_ horizontal_position_maximum
display_width
Figure 4: Use of Display definition segment parameters
ETSI