What's the difference between the ISP and the DSP?

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ISP - Image Signal Processor
DSP - Digital Signal Processor

ISP is a HW accelerator for known algorithms in the realm of image processing.
There is no access to modify ISP FW or running your own programs on an ISP.
There is a certain amount of control through the driver to impact the behaviour.
DSP is more general purpose in which Hailo utilizes to do the pre & post processing.

The following table summarizes the main functionality utilized on Hailo-15: