  The noncommutative standard model apparently violates the Lorentz symmetry.
We compare the Lorentz violating terms in the Higgs sector of the
noncommutative standard model with their counterparts in the standard model
extension. We show that the Lorentz violating parameters in the Higgs sector
can be expressed directly in terms of the noncommutative parameter without any
background field. The absence of the background field enhances the obtained
bounds on the noncommutative parameter from the standard model extension.
