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Altera_Forum
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15 years ago

Scaler II vs Scaler problems

Hi, I have a working video processing design that includes the Scaler (v 9.1sp2). In the design I need to convert from 4:2:2 to 4:4:4, scale the video, and then go back to 4:2:2. With the Sc...
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Altera_Forum
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15 years ago

Hi Kieron,

Yes, I use the Megawizard.

The Scaler II is generated with 3x8bit parallel video data input. Runtime controlling option ha already been tried with both disabled and enabled state without any change in the result. Resolution is 1920x1200. 4:2:2 option is unchecked (4:4:4 input) and "No blanking in video" option has also been tried both checked and unchecked.

Scaler algorithm is polyphase with shared hor/ver coefficients. Default settings are left unchanged for the precision.

The older Scaler did not have byte enable pins while the new one has them. I modified my Scaler controller modul corresponding to the standard found in the Altera Avalon Interface Specification (p. 3.23). The new register set was also included into the Scaler II controller, of course but I use only the 0, 1, 3 and 4 registers for changing the output width and height.

Best regards,

Istvan