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DVD盘片标准是由DVD论坛(DVD Forum)来统一制定,所以它的标准一般用Book X(X=A,B,C…)来表示。DVD论坛是由Philips和SONY的MMCD联盟和由日立和松下等7家公司组成的SD联盟在Holly-wood的介入下,由这9家公司和时代华纳共10家公司组成。由这一联盟统一制定标准,验证质量,发放许可证。这一DVD标准中的专利分布如下:松下拥有25％约4000个专利,先锋和SONY各拥有20％,Philips、日立和东芝各拥有10％,汤姆森拥有5％,剩下的成员:三菱、JVC和时代华纳只占有微不足道的份额。
The DVD disc standard is standardized by the DVD Forum, so its standard is generally expressed in Book X (X = A, B, C ...). The DVD Forum is comprised of the MMCD consortium of Philips and SONY and the SD Consortium of seven companies, including Hitachi and Matsushita, consisting of 10 companies from 9 companies and Time Warner, with Holly-wood’s involvement. By this alliance to develop a unified standard, verify the quality, licensing. The patents in this DVD standard are distributed as follows: Panasonic owns 25% and 4,000 patents, Pioneer and SONY each have 20%, Philips, Hitachi and Toshiba each own 10%, and Thomson owns 5%. The remaining members: Mitsubishi, JVC and Time Warner have only a negligible share.