Data recording medium, contents data, recording medium, data recording method and apparatus, and data reproducing method and apparatus

摘要

A recording medium in which data of contents in which additional information including management information each having a data length corresponding to one packet has been embedded in a state where it has been distributed to a plurality of packets has been recorded, wherein the management information includes an information portion where information is rewritable and an information portion where information is not rewritable and an identifier for identifying the rewritable information portion and the unrewritable information portion is provided for each of the information portions.