| 摘要 |
<p>To prevent dissemination of content stored on a DVD-RW disc, CPRM is provided.However, this does not provide a watertight system. The invention proposes toarrange a stream to be recorded such that the input for verification data and thereforeverification data is different for different authorisation levels. Variousembodiments for implementing the invention are disclosed and comprise re-arrangingdata packs to be recorded and /or modifying data in data packets.</p> |
