John Ryan has stepped down as CEO of homevid and software copy protection firm Macrovision Corp. He will continue to serve as the Sunnyvale, Calif.-based company’s chairman. The change will allow Ryan to concentrate on the expansion of the company’s business, technology and intellectual property base. Macrovision prexy and chief operating officer William Krepick takes over as CEO. Krepick joined Macrovision in 1988 as veep of sales and marketing. He has served as prexy and COO since 1995.