MAM-A (Mitsui) DVD-R Copy Protection
Posted: 06/21/2005 3:59 pm
< < MAM-A Technology
There are various copy protection systems and programs to prevent illegal copying of DVD video and audio content. Here is the state of play :
 | Analogue Protection System (APS) involves the activation of circuitry in the DVD player by so-called trigger bits. An integral part of the DVD format, the Macrovision Copy Protection is to date, the only such system in use. |
| Copy Generation Management System (CGMS) is a means of marking and identifying the permitted status of the material on the disc. This analogue system has a planned digital implementation. |
| Content Scrambling System (CSS) is a form of data encryption, developed under the auspices of the multi-industry Copy Protection Technical Working Group (CPTWG) and now administered by the DVD Copy Control Association. |
| Content Scrambling System 2 (CSS2) is focusing on DVD-Audio copy protection (Due to security concerns expressed by the recording industry, among others, as a result of the recent hack of the CSS video technology, the DVD CCA has withdraw the CSS2 technology from consideration for use with DVD Audio products. A substitute encryption system is under devlopment). |
| Digital Transmission Content Protection (DTCP), backed by Intel, Sony, Hitachi, Matsushita and Toshiba. |
| Content Protection System Architecture (CPSA). Establish overall system architecture for protected content. Proposed by the 4C group (Toshiba, MEI, IBM and Intel). |
| Content Protection for Prerecorded Media (CPPM). DVD-Audio copy protection scheme proposed by 4C. |
| Content Protection for Recordable Media (CPRM). Provides effective protection against unauthorized casual consumer copying of audio/video entertainment content. Proposed by 4C. |
| Content Protection Framework, a DVD-Audio copy protection scheme. |
| 3DCD, a joint venture between Technicolor and Applied Holographics, which has developed a proprietary edge-to-edge holographic technology. |
| Secure Digital Music Interactive (SDMI), through which the music industry is promoting a secure copy protection system for its material. |
| Galaxy The group (Hitachi, IBM, NEC, Pioneer, Sony) proposed a video watermark technology for CSS. |
| Verance. An audio watermark for DVD-Audio and SDMI. |
| Copy Protection Technical Working Group (CPTWG) is a voluntary group chaired by IBM. It meets monthly in Los Angeles. Attendees include consumer electronics maker, the IT, movie and music Industries, CEMA, MPAA, RIAA, etc... |
 | Copy Protection situation |
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| Items | Method | Technical Answers |
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| Media Identification | Media recognition | 1. Book Type in the Control Data zone |
| Never Copy (CSS) | CSS Key protection | Embossed or pre-recorded |
| Once Copy (Revocation) | Serialization | NBCA for DVD-RW Under discussion for DVD-R General |
| CSS KEY System |
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| NBCA Copy Protection |
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