The Digital Fact Book - Quantel

MoiréRefers to a distortion that appears as patterning seen on images where two similar finepatterns overlap, for example two fine gratings can appear to produce diagonal lines.The affect can appear even when one to the patterns is normally invisible, such as thesampling frequency of the image. In a good image system this should be avoided by useof filters but, for instance, the fine detail of a grid pattern may suddenly collapse andappear as curves or diagonal lines as the camera zooms in and the pattern detail nearsthe digital sampling frequency.MOSMedia Object Server (protocol) – a communications protocol for newsroom computersystems (NCS) and broadcast production equipment. It is a collaborative effort betweenmany companies to enable journalists to see, use, and control a variety of devices from theirdesktop computers, effectively allowing access to all work from one screen. Such devicesinclude video and audio servers and editors, still stores, character generators and specialeffects machines.MMOS uses a TCP/IP-based protocol and is designed to allow integration of productionequipment from multiple vendors with newsroom computers via LANs, WANs and theInternet. It uses a ‘one-to-many’ connection strategy – multiple MOSs can be connectedto a single NCS, or a single MOS to many NCSs.Website: www.mosprotocol.comMotion vectorsSee MPEG-2124