DVD-Video is a consumer video format used to store digital video on DVD discs, and is currently the dominant consumer video format in Asia, North America,Europe, and Australia. Discs using the DVD-Video specification require a DVD drive and a MPEG-2 decoder (e.g., a DVD player, or a computer DVD drive with a software DVD player). Commercial DVD movies are encoded using a combination of MPEG-2 compressed video and audio of varying formats (often multi-channel formats as described below). Typically, the data rate for DVD movies ranges from 3 Mbit/s to 9.5 Mbit/s, and the bit rate is usually adaptive. It was first available for retail around 1997.

The DVD-Video specification was created by DVD Forum and can be obtained from DVD Format/Logo Licensing Corporation for a fee of $5,000. The specification is not publicly available, because every subscriber must sign a non-disclosure agreement. Certain information in the DVD Book is proprietary and confidential.

To record moving pictures, DVD-Video uses either MPEG-2 compression at up to 9.8 Mbit/s (9,800 kbit/s) or MPEG-1 compression at up to 1.856 Mbit/s (1,856 kbit/s).

John Corvino (born 1969) is an American author, lecturer, and professor of philosophy at Wayne State University.

Corvino attended St. John's University in New York City, graduating with a bachelor of arts degree in 1990. He earned his PhD in philosophy at University of Texas at Austin in 1998.

Dr. Corvino is an associate professor in the Department of Philosophy at Wayne State University in Detroit, Michigan. He began teaching there in 1998 and received tenure in 2007. His focii are ethics, applied ethics, and early modern philosophy. Other areas of philosophy which he has concentrated are the philosophy of religion, social philosophy, and political philosophy. His dissertation involved David Hume, and Corvino has taught classes focusing on Hume as well as British empiricism.

He has written and lectured extensively on gay rights. He has also written on business ethics.

Corvino has contributed to many academic journals and periodicals, including Gay and Lesbian Review Worldwide, Southwest Philosophy Review, Business Ethics Quarterly, Philosophical Quarterly, and Ethics. He is a columnist for Between the Lines and the online Independent Gay Forum.