Is the video processor necessary for led display?

When asking an offer from led display manufacturers, frequently the clients see the option of video processor which costs not little. So is the video processor necessary for led display?
To find the answer, we need to learn the function of the video processor. Simply speaking, the video processor is to covert the external signal to the signal type compliant with the led display. And during this process, the led video processor need to accomplish the steps as below:

1. The improvement of the processing depth. Now the grey level of led screen has reached 16 bits, while the input signal source are mostly 8 bits. Hence, following with the HD display times, 10 bits or even 12 bits processing technology would be adopted widely.
2. The convert of resolution spec. Most the video signal sources such as blue ray DVD, PC, HD player have the defined spec (refer to VESA, ITU, SMPTE standards), but the modular design of led screen makes the resolution any value. And the video processor is going to covert all kinds of signal resolution to the physical resolution of led display screen.
3. Zoom Scale: during the process of resolution spec convert, the image need the zoom, no matter to let it bigger of smaller, there would be complete image on the led screen.
4. Color space conversion: the colour gamut of the led display is very wide, while most the signal's color gamut is small, for example NTSC. To achieve the excellent color and image performance on the led screen, the color space conversion should be done.
5. The image process and enhance technology: the digital image process technology has been developing since 20's of 20th century. And there are a lot of patent technology such as DCDi, ACC2, ACM3D etc of Faroudja Lab. Those technology has improved greatly the visual effect of the images.

In practical usage, the video processor is not quite necessary if the led display is for common use and the video source is only from computer; but if you'd need the input from DVD, Video camera etc external signal sources, the video processor would be necessary. And if there's very strict requirement on the convenience and video quality of led screen, it's better to choose the led video processor.