| 摘要 |
<p>The present invention relates to a method and a parameter-determining unit (100) for determining a first focus offset parameter value. The method of determining this parameter value for writing content data to a multilayer storage medium (114) comprises the steps of writing test data sequences using different estimated first focus offset parameter values (step 206), reading the test data sequences (step 206), determining values of at least one data deviation measure of the read test data sequences (step 206), and determining the first focus offset parameter value in dependence upon the determined values of at least one data deviation measure (steps 210,222), such that the block error rate of the read-out of content data, written to the multilayer storage medium (114) while using the determined first focus offset parameter value and read from the multilayer portable storage medium (114) while using the determined second focus offset parameter value, is minimized.</p> |
