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| Definition | A form of optical media that, unlike DVD, stores video as a composite analog signal. The laser disc was first introduced by Philips and MCA in 1972, and has been on the market since 1978. Laser discs can be glass or plastic. There are essentially two types of laser disc: those mastered for constant linear velocity (CLV) and those mastered for constant angular velocity (CAV). CAV store approximately 30 minutes of video, can be controlled in a frame-accurate way and can be still framed. CLV discs can store approximately one hour of video but cannot be controlled frame-accurately and cannot be still-framed. Once a popular display format for many artists, the laser disc has now largely been superseded by DVD. http://www.bavc.org/index.php?option=com_content&task=view&id=568&Itemid=932#lase |
| Alternate Terms = | Compact disc Optical disc |
| Broader Term ↑ | Storage carrier |
| Related Term ↔ | Constant bit rate |