Patent attributes
A device for realizing on screen display (OSD) in video signals includes a comparator (430) and an outputting control unit (440). The comparator (430) is used for receiving OSD signals and identification signals on a background color selected to be transparent in the OSD signals, identifying the background color in the OSD signals based on the identification signals, and generating a control signal based on the identification. The outputting control unit (440) is connected to the comparator (430), and is used for receiving UV components of the OSD signals, UV components of the video signals, and the control signal, and for selectively outputting UV data of the video signals or UV data of the OSD signals according to the control signal. The device simulates translucent OSD by preparing the Y and UV components of displayable YUV signals respectively from the video signals and the OSD signals.
