| 摘要 |
<p>Briefly, the present invention provides an optical disc and method for distributing protected content. Promotional content is provided on the disc in an area that is freely accessible by a consumer. The disk also has commercial content, such as a movie, that is accessible only after the consumer completes an activation process. More specifically, the commercial content is in an area of the disc protected by an optical shutter. In its initial state, the shutter interferes with the player's ability to read the protected data. But, after the activation process, the protected data is fully accessible. In this way, a single optical disc may be used to distribute free promotional content, as well as facilitate the selling of commercially valuable content.</p> |
