either the WHD-3AL0 or the WHD-33A0 optical disc; WHD-3Al0 for CLV mode (up to 10 minute video or 18,000 still frames per side); WHD-33A0 for CAV mode (up to 3 minute video or 5400 still frames per side). The HDL-2000 was a full band high definition video disc player. Video cassettes W-VHS allowed home recording of Hi-Vision programmes. See also Analog high-definition television system HD-MAC, a planned high-definition analog video standard in Europe Clear-Vision The analog TV systems these systems were meant to replace: SECAM NTSC PAL Related standards: NICAM-like audio coding is used in the HD-MAC system. Chroma subsampling in TV indicated as 4:2:2, 4:1:1 etc... ISDB References External links Example of an early MUSE LaserDisc player Hi-Vision, MUSE, and the Optical Disc Television technology High-definition television History of television Japanese inventions ISDB