In the legal battle between RealDVD and Hollywood studios, RealNetworks is fighting back by filing a antitrust violation suit against the studios and the DVD CCA (DVD Copy Control Association).
Real is accusing both groups of violating antitrust laws by collaborating together to prevent the copying of DVDs in association with the "Fair Use" act.
Fair use is a legal concept that allows the reproduction of copyrighted material for certain purposes without obtaining permission and without paying a fee or royalty.
The studios (MPAA) claim the RealDVD software violates the Content Scramble System, or CSS, that is licensed by the DVD Copy Control Association. According to the DMCA, circumventing or breaking copyright protection is illegal.