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Altera_Forum
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16 years ago

scaler usage in run time control

I am using vip suite 9.0 and quartus 9.0 for out new project. I am able to process frames with scaler in static parameters mode there is problem with runtime controle mode.I had following ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
16 years ago

According to my calculations:

You did not mention the color space you are working in. I'm going to assume 4:4:4 YCbCr. Your 16 bit wide DDR2 has a bandwidth of 10.656 Gbps if operated at 333MHz (666 data rate). Obviously the calculations change if you run it slower or faster than this. This gives you a local interface width of 64 bits using the Altera high performance controller.

Here are the calculations for the MA deinterlacer.

1 - Converting 4:4:4 1080i60 to 4:4:4 1080p60 - MA deinterlacer bandwidth is ~11.281Gbps (106% of your available bandwidth). Not enough bandwidth

2 - Converting 4:4:4 1080i60 to 4:4:4 1080p30 - MA deinterlacer bandwidth is ~7.299Gbps (68% of your available bandwidth).

The above calculations are valid for either 10bit 4:4:4 YCbCr or 10bit RGB.

In 9.1, Altera is supposed to release the 4:2:2 version of the deinterlacer. So if you are doing YCbCr and you can process it in 4:2:2

1 - Converting 1080i60 to 1080p60 results in a bandwidth of ~8Gbps or ~75% of your available bandwidth.

Jake