D2-MAC
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[edit] History of D2-MAC
D2-MAC was created to solve D-MAC's bandwith 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.
[edit] 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 subcarrier.
- The MAC standard included a standard scrambling system, EuroCrypt, a precursor to the standard DVB-CSA encryption system.
[edit] See Also
Weblinks
- Multiplexed Analogue Components in "Analog TV Broadcast Systems" by Paul Schlyter
TV transmission systems
- Analog_high-definition_television_systems
- PAL, what MAC technolgy tried to replace
- SECAM, what MAC technolgy tried to replace
- A-MAC
- B-MAC
- C-MAC
- D-MAC
- E-MAC
- S-MAC
- D2-MAC
- HD-MAC, an early high-definition television standard allowing for 2048x1152 resolution.
- DVB-S, MAC technolgy was replaced by this standard
- DVB-T, MAC technolgy was replaced by this standard
