发明名称 |
Optical disc hidden data technique |
摘要 |
An optical disc having a plurality of user data written to the disc from a lead-in zone to a lead-out zone, the disc comprising a plurality of control display data composed of a plurality of subcode registers, each having a value, where the control display data are written to the disc interposed with the user data and written to the lead-out zone and hidden data encoded within one of the subcode registers in the lead-out zone. The p-bit register in the lead-out zone of the optical disc required to toggle at a rate of 2 Hz. In one second, the optical disc reader reads 75 p-bit registers, therefore a perfect 2 Hz toggling cannot be achieved. The location of a p-bit state composed of a fewer number of p-bit sector is used to represent a bit value of hidden data.
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申请公布号 |
US6717899(B1) |
申请公布日期 |
2004.04.06 |
申请号 |
US20010792164 |
申请日期 |
2001.02.23 |
申请人 |
DOUG CARSON & ASSOCIATES, INC. |
发明人 |
CARSON DOUGLAS M.;KELLY HENRY B. |
分类号 |
G11B20/00;G11B20/10;(IPC1-7):G11B5/76 |
主分类号 |
G11B20/00 |
代理机构 |
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地址 |
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