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9 results for “bits”

Formulae (9)

bits = bytes \times 8

Convert bytes to bits.

H = -\sum_i p_i \log_2 p_i

Average information content of a random source (bits).

d(x,y) = \sum_i [x_i \ne y_i]

Number of positions at which two strings differ.

b = \lceil \log_2(n) \rceil

Minimum number of bits to represent n distinct values.

a \oplus b = (a \lor b) \land \lnot(a \land b)

Exclusive OR: true when exactly one input is true.

-N = \lnot N + 1

Represents negative integers in binary by inverting bits and adding one.

N = 2^n

Number of addressable locations for n bits.

p = b_1 \oplus b_2 \oplus \cdots \oplus b_n

XOR of data bits used for error detection.

2^r \geq m + r + 1

Parity bits r needed to protect m data bits.