It is fundamentally different than YUV (PAL)/YIQ (NTSC). In those systems, the IQ/UV regions are monotonic. In the Jaguar color space, axes have different meanings depending on which quadrant you're in. In the (-1,-1),(0,0),(1,-1) triangle the vertical dimension appears to have no effect.
When Nintendo natively used the YIQ color space for the NES, that makes sense, because it simplified the hardware, because it's the color space used by NTSC. It's not apparent to me that there's an easy way to convert this non monotonic color space into YUV/YIQ.
When Nintendo natively used the YIQ color space for the NES, that makes sense, because it simplified the hardware, because it's the color space used by NTSC. It's not apparent to me that there's an easy way to convert this non monotonic color space into YUV/YIQ.