Method of storing information on and retrieving information from a magnetic drum

摘要: The disclosed embodiment of the present invention is a method storing pictorial information on and retrieving from movable storage media to permit rapid access retrieval such for displaying either whole or submultiple in minimum time. comprises writing blocks magnetic drum, with each block being formed one more lines scanned information. are arranged step fashion drum successive spaced along direction travel distance equal line length smallest picture be displayed. In embodiment, four scan written 16-bit parallel format spacing occupied by onefourth Since greater than displayed information, that portion which read compressed means logic circuits, supplied display storage. continuously CRT an operator.