Osd Core Region Definition; Figure 75: Definition Of Osd Region; Table 37: Regions Used For Osd Components - Analog Devices ADV8003 Hardware Manual

Function
osd_reset
0 
1

4.2.5.1. OSD Core Region Definition

A region defines an area on the plane, as shown in
OSD software and, therefore, contain the different elements of the OSD, for example, the text, images, icons, and so on. In other words, the
regions define how the OSD pixels to be displayed are stored in DDR2 memory. The equivalence between OSD components and regions
can be found in Table 37. A maximum of 256 regions can be displayed simultaneously on the screen.
Note: Only the regions being displayed at a given time count (and not the total on the whole OSD), so this number should be more than
enough for even the most complex OSD.
For example, if the designed OSD uses the OSD Menu bar component shown in
there will be three regions in use at the time when the selected icon is Node1 (that is, the elements from the same level, Node1, Node5 and
Node6). When the selected icon is Node3, there will be three regions in use, that is, Node2, Node3, and Node4. When the selected icon is
Node7, there will be two regions in use, that is, Node7 and Node8.
Note how the efficient translation of components to regions means that it is almost impossible to run out of regions while designing even
the most complex OSD.
Rev. B, August 2013
Description
Default
Resets OSD core
75. The regions are derived from the OSD components defined in the Blimp
Figure
OSD region
OSD plane
Background Video

Figure 75: Definition of OSD Region

Table 37: Regions Used for OSD Components

Component Number of Regions Needed in Hardware
OSDLabel 1
OSDImage 1
OSDHistogram 1
OSDKeyboard 2
OSDProgressbar 2
OSDTextbox 1
OSDMenubar One region per item on each level
OSDListbox One region per item
OSDTimer 0
OSDIptextbox 1
Figure 76, and the user is moving through the icon menu,
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