about the use of avalon streaming interface

1. Yes, VS and HS should be inverted:

From video and image processing suite user guide.pdf:

Table 5–13:

Clocked Video Input Signals for Separate Sync Format Video:

vid_datavalid: When asserted the video is in an active picture period (not horizontal or vertical blanking).

vid_h_sync / vid_v_sync: When 1, the video is in a horizontal /vertical sync period.

My panel is active low for HS and VS, that's why they are inverted.

2. I don't use modelsim

Thanks