What level is the TT ECL, I'm guessing it's negative ECL? SVGA is TTL right? You need to convert from EVL to TTL.
ECL:
V(H) = -0.9 V
V(L) = -1.7 V
You might be able to get away with using a couple of capacitors and resistors. You may require a 5v power source. Think about using the TTL Hsync, rectified to DC as the power requirments should be pretty low.