<p>I think the "Californian schools" you have heard about are probably the UCs and CSUs (state schools) which do not use freshman year grades to determine eligibility. USC is not a UC or CSU. </p>
<p>As for USC, the admission standards webpage says: "Grade Point Average*
When assessing grade point average, consideration is also given to class rank and to the strength and frequency of Advanced Placement/International Baccalaureate course work in a student's curriculum. Naturally, we are interested in consistently strong academic performance throughout your four-year high school record. However, we realize that some bright students, for one reason or another, don't always get off to a great start in ninth grade. In these cases, special attention is given to steady and substantial improvement throughout the sophomore, junior and senior years."*
<a href="http://www.usc.edu/admission/undergraduate/apply/fresh_standards.html%5B/url%5D">http://www.usc.edu/admission/undergraduate/apply/fresh_standards.html</a>
So it sounds as though they will look at your improvement favorably. Good luck!</p>