Hi Kevin,
In ADV7625, we have global alpha which can be applied for the whole OSD and Fbox alpha which is for full Fbox.
You can refer ADV7625 Register control manual for the same.
https://ez.analog.com/docs/DOC-10766
OSD Map
Register | Bits | Description |
OSD_GLOBAL_ALPHA[5:0] | ||
Ox03 | 00111111 | This signal is used to control the transparency of the whole OSD. A higher vlaue means less transparent. 000000 - 100% Transparent, - … 111111 - 100% Opaque |
OSD_FBOX_ALPHA[5:0] |
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Ox04 | 00110000 | This signal is used to control the transparency of filled boxes within the OSD. A higher value means less transparent. 000000 - 100% Transparent, - … 111111 - 100% Opaque |
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But in ADV7623, we have only Fbox alpha.
In general, the transparency effect is for the full Fbox which includes Border also. We can’t make the Border alone visible.
In Blimp software, this feature is not yet added and we are planning to add it in the future
Best Regards,
Jeyasudha.M