CoVi Technologies, an Austin-based company focused on creating an integrated, comprehensive video surveillance system, has raised an additional $4.1 million in equity financing.  The company, which has raised nearly $60 million in equity financing since 2003, designs, develops and manufactures high-definition, television-quality systems, as well as offering a systems-based approach to high-definition video surveillance.  Given the size of this round, and the fact that each of the last few rounds have  been around $15 million, this funding may be an amount which the investors hope will be enough to push the company to either be acquired or go public.