A group of data bits that are processed together. Typically, a byte consists of 8, 16, 24 or 32 bits.

1 Byte = 8 bits = 256 discrete values (brightness, color, etc.)

1 kilobyte = 210 bytes = 1,024 bytes: (not 1000 bytes)

1 Megabyte = 220 bytes = 1,048,576 bytes: (not 1 million bytes)

1 Gigabyte = 230 bytes = 1,073,741,824 bytes: (not one billion bytes)

1 Terabyte = 240 bytes = 1,099,511,627,776 bytes: (not one trillion bytes)

A full frame of digital television, sampled according to ITU-R 601, requires just under 1 Mbyte of storage (701 kbytes for 525 lines, 829 kbytes for 625 lines). HDTV frames are 4-to-5 times as large and digital film frames may be that much larger again.