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The Copy Generation Management System - Analog (CGMS-A) is a copy protection system for analog video signals. Various countries and regions use different versions of CGMS-A. A hardware vendor must ensure that their display miniport driver supports the appropriate CGMS-A version.
For example, a driver for a graphics adapter to be used in Japan should probably support the Association of Radio Industries and Businesses (ARIB) TR-B15 standard, which is the operational guideline for digital satellite broadcasting. However, a driver for a graphics adapter to be used in the United States should support the International Electrotechnical Commission (IEC) 61880 standard or the Consumer Electronics Association (CEA) CEA-608-B standard. The standard that a graphics adapter's display miniport driver supports depends on the type of signal that the adapter transmits.
The following list describes various standards that define CGMS-A. Redistribution control is defined only in the CEA-805-A standard.
CEA-805-A
- Data on Component Video Interfaces
- Defines how CGMS-A and redistribution control information should be encoded in an analog 480p, 720p, or 1080i signal that is transmitted from a component video output (Y/Pb/Pr output).
- This standard is published by the Consumer Electronics Association (CEA).
CEA-608-B and EIA-608-B
- Line 21 Data Services
- Defines how CGMS-A information should be encoded in a 480i signal that is transmitted from an RF, composite, or S-Video output.
- This standard is published by CEA and Electronic Components Industry Association (ECIA).
EN 300 294 V1.3.2 (1998-04)
- Television systems; 625-line television - Wide Screen Signaling (WSS)
- Defines how CGMS-A should be encoded in a 576i Phase Alternation Line (PAL) or Sequential Color with Memory (SECAM) signal.
- This standard is published by the European Telecommunications Standards Institute (ETSI).
IEC - 61880 - First edition - Video systems (525/60)
- Video and accompanied data using the vertical blanking interval - Analog interface
- A method of encoding CGMS-A information in a 480i video signal that is transmitted from an analog or digital video output.
- This method is published by International Electrotechnical Commission (IEC).
IEC - 61880-2 - First edition - Video systems (525/60)
- Video and accompanied data using the vertical blanking interval - Analog interface - Part 2: 525 progressive scan system
- A method of encoding CGMS-A information in a 480p video signal that is transmitted from an analog or digital video output.
IEC - 62375 - Video systems (625/50 progressive)
- Video and accompanied data using the vertical blanking interval - Analog interface
- A method of encoding CGMS-A information in a 576p video signal that is transmitted from an analog or digital video output.
ARIB TR-B15
- Operational Guideline for Digital Satellite Broadcasting
- Defines how CGMS-A information should be encoded in an analog 480i, 480p, 720p, or 1080i signal that is transmitted from a video output.
- This standard applies only to Japan.
- This standard is published by the Association of Radio Industries and Businesses (ARIB).