发明名称 |
Access controlled optical disc and method therefor. |
摘要 |
An optical disc is disclosed having a set of primary tracks and a set of alternate tracks. At least some of the primary and alternate tracks are associated. When a CD-DA reader accesses the optical disc, it locates only the primary tracks. By contrast, when a data reader such as a CD-Rom drive accesses the disc, modifications to the Table of Contents (TOC) cause the data reader not to access a given primary track but instead to be directed to its associated alternate track. This alternate track may contain audio (CD-DA) data which may or may not correspond with the CD-DA data in the associated primary track. The alternate tracks may be copy protected, and/or may include compressed (not CD-DA) data which is the subject of digital rights management. |
申请公布号 |
ZA200501201(B) |
申请公布日期 |
2005.09.01 |
申请号 |
ZA20050001201 |
申请日期 |
2005.02.10 |
申请人 |
H.T.A. HIGH TECH APPLICATIONS HOLDINGS LIMITED |
发明人 |
ALISTAIR JOHN KNOX;ARIE MARINUS WIJNEN |
分类号 |
G11B20/10;G11B19/04;G11B19/12;G11B20/00;G11B20/12 |
主分类号 |
G11B20/10 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|