Recorded at high density on an optical disk are at least one title set and a volume information file. The title set consists of a plurality of files aligned on a boundary between logical sectors. The files store title set management information and data objects to be reproduced. To retrieve data from...http://www.google.com/patents/US5778142?utm_source=gb-gplus-sharePatent US5778142 - Large capacity recording medium, method and apparatus for reproducing data from a large-capacity recording medium, and method and apparatus for recording data on a large-capacity recording medium 
