Programming

textual information – information expressed using natural and formal languages in written or printed form.

Encoding text information

symbols 0-32: Operations, line feed, space input

symbols 33-127: International, Latin alphabet, numbers, punctuation marks and mathematical operations

symbols 128-255: National, symbols of Russian alphabet or other languages

2ⁱ =256=2ⁱ=2⁸=i= 8bit = 1 byte

Table Unicode

2 bytes are allocated for each character

_{Windows, MS-DOS, КОI-8, Mac}

N = 2⁸ = 256

_Unicode

N = 2¹⁶ = 65536

Encoding graphic information

The spatial resolution of a monitor is the number of pixels that make up the image on its screen.

системы цветопередачи

dead pixel

Encoding pixel dots

2ⁱ = N

N – Amount of colors

I – Color depth, the length of the binary code that is used to encode the color of a pixel

Encoding sound information

Sound – elastic waves propagating in a medium and creating mechanical vibrations in it

amplitude – volume

frequency – height

Information volume of digitized sound

2b = N

I = H * t * b

N – Number of volume levels

b – Audio coding depth, quantization bit depth

H – Sampling frequency

I – Information volume of the file

In duration of 25 seconds, sound was recorded into a computer at a sampling frequency of 22.050 kHz and a quantization depth of 16bit. Determine the information volume of the resulting sound file.

Encoding video information