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Megabit Per Second




A megabit per second (abbreviated as '''Mbps''', '''Mbit/s''', or '''mbps''') is a Unit of Data Transfer Rate s equal to 1,000,000 Bits Per Second (this equals about 976 Kilobits Per Second ). Because there are 8 bits in a Byte , a transfer speed of 8 megabits per second (8 Mbps) is equivalent to 1,000,000 '''bytes''' per second (approximately 976 KiB/s).


USAGE EXAMPLES

The Bandwidth of consumer Broadband Internet services is often rated in Mbps.

Data streams representing Compressed Video are often measured in Mbit/s:
  • 2 Mbit/s — VHS quality

  • 8 Mbit/s — DVD quality

  • 55 Mbit/s — HDTV quality


More specific examples found on standard Comcast digital streams (transmitted in MPEG2 format):
  • 2-3 Mbit/s — a low-definition digital channel with a very clean signal

  • 5-6 Mbit/s — a low-definition digital channel with a digitized ("dirty") analog signal (or just an analog channel)

  • 8-12 Mbit/s — a medium to high-definition digital channel with DVD quality data (equivalent to HBO -HD)

  • 18-20 Mbit/s — a high-definition digital channel at 1080i (equivalent to Discovery HD)


Another example, Network Card s and Cable s are typically available in 10/100/1000 Mbit/s. This means they can support a transfer rate of 10 or 100 or 1000 Mbit/s.


INTERFACE AND DEVICE SPEEDS



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