Optical disc and method of recording data into same
AssigneeSony Corporation
InventorHideo Owa
Life of this patent
Estimating the term…
Abstract
An optical disc (1) has a plurality of sectors each including a header area and a recording area, in which a position where a predetermined amount of data is recorded provides an ID information (medium ID peculiar to the optical disc). The ID information in the optical disc (1) is used by a first encryption circuit (12) to encrypt a disc key to encrypt AV data as a whole, the encrypted disc key is used by a second encryption circuit (13) to encrypt a sector key to encrypt the AV data for each program, and the encrypted sector key is used by a third encryption circuit (14) to encrypt the AV data for each program. The AV data subjected to at least the first to third encryptions is recorded into the recording area of the optical disc (1).
Claims24
An optical disc having a plurality of sectors each including a header area and recording area, in which an actual position at which data, which includes audio and video information, is recorded in the recording area of each sector provides ID information, wherein said ID information uniquely identifies the optical disc.
A method of recording data into an optical disc having a plurality of sectors each including a header area and recording area, comprising the steps of:
- encrypting a disc key using identification (ID) information provided by a position where data which includes audio and video information is recorded in the recording area in which said ID information identifies said optical disc;
- encrypting a sector key using the encrypted disc key;
- encrypting user data using the encrypted sector key;
- and
- recording the encrypted user data into the recording area of the optical disc.
An optical disc having a plurality of segments each including a header area and recording area, in which an actual position at which data, which includes audio and video information, is recorded in the recording area of each segment provides ID information, wherein said ID information uniquely identifies the optical disc.
A method of recording data into an optical disc having a plurality of segments each including a header area and recording area, comprising the steps of:
- encrypting a disc key using identification (ID) information obtained by a position where data which includes audio and video information is recorded in the recording area in which said ID information identifies said optical disc;
- encrypting a sector key using the encrypted disc key;
- encrypting user data using the encrypted sector key;
- and
- recording the encrypted user data into the recording area of the optical disc.
Dependencies are inferred from the claim text.