D2-MAC was created to solve D-MAC's bandwidth problem on European cable systems.
- D2-MAC uses half the data rate of D-MAC {10.125Mb/s}
- D2-MAC has a reduced vision bandwidth, about 1/2 that of D-MAC.
- D2-MAC retains most of the quality of a D-MAC signal -- but consumes only 5MHz of bandwidth.
MAC FAQ
MAC transmits luminance and chrominance data separately in time rather than separately in frequency (as other analog television formats do, such as composite video).
Audio and Scrambling (selective access)
- Audio, in a format similar to NICAM was transmitted digitally rather than as an FM sub-carrier.
- The MAC standard included a standard scrambling system, EuroCrypt, a precursor to the standard DVB-CSA encryption system.
See also
Web links:
- Multiplexed Analogue Components in "Analog TV Broadcast Systems" by Paul Schlyter
TV transmission systems
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