t_HP = Horizontal Total
t_WH = Horizontal Sync Width
t_HBP = Horizontal Back Porch
t_HV = Horizontal Active
t_HFP = Horizontal Front Porch

t_VP = Vertical Total
t_WV = Vertical Sync Width
t_VBP = Vertical Back Porch
t_VV = Vertical Active
t_VFP = Vertical Front Porch