In our project, our video encoder programe product the YUV422 signal, but the LCD need RGB signal. But a converting from YUV to RGB on 25fps spending too much performance of CPU. I want to know where can get a LCD display support YUV signal directly.
There is no such thing. An LCD "natively" supports RGB ONLY because that is the actual color model of the physical display. Although it's possible to imagine an LCD with colorspace conversion bolted onto the front-end, I've never seen or heard of such a thing as a standard product, and it would be expensive. Either upgrade your CPU horsepower, use a huge lookup table, or look at rolling your own hardware conversion.
All modern video chips include YUV overlay support in hardware. But generally this phase is not the most CPU-intensive, it's normally the MC that really gobbles the cycles.
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