DYNAMIC COPY WINDOW CONTROL FOR DOMAIN EXPANSION READING

摘要

Method and apparatus for reading a magneto-optical domain expansion recording medium (10), wherein the size of a spatial copy window of a domain copying process is controlled by varying a predetermined reading parameter in response to a control information derived from a readout pulse. A predetermined additional pattern of change is applied to said predetermined parameter and the control information is then derived from a deviation of a clock signal. The size of the copy window can thus be controlled dynamically to obtain a robust and reliable readout process.