1 track corresponds to the number of bytes

Bits Bytes of data

information = Knowledge (details) about things or processes

Data = standardized / systematic (comparable) information on processing and storage

Whether text, music, images or video - so that a computer can process information, all data must first be available in a binary number system (digital data), i.e. a system that only knows two states: 0 or 1, or electricity flows or flows Not.

The smallest storable unit, that is
a 0 or a 1 is called 1 bit

Magnetic: South Pole - North Pole

(e.g. on the hard drive)
Current flows - does not flow

(e.g. in the main memory or processor)
Optical: deepening - no deepening

(e.g. CD / DVD)

For example, to be able to save all letters of the alphabet, numbers and special characters, you need several bits. In the history of data processing, a sequence of 8 bits - called 1 byte - has established itself as a unit for one character. Which pattern of bits should represent which character was specified in the ASCII character code.

1 byte consists 8 bit
With 1 byte, 256 (= 28)
represent different characters.

1 bit   2    3   n 8 bit (= 1Byte)
2 options 482n28 = 256 possibilities

Each 8-digit combination of bits (= 1 byte) stands for an alphanumeric character or a number between 0 and 255.


e.g. for one of 256 colors ...

If characters other than the ones we usually use (e.g. Cyrillic characters) are to be processed, the type of character each byte contains must be determined beforehand - further character codes have been invented for this. If that is no longer enough - e.g. if characters from different cultures appear in a text, color values ​​of a pixel, amplitudes of a sound signal, etc. are to be saved - several bytes have to be combined into one information unit.

Memory size prefixes

The size of files or the capacity of storage media is specified in the unit byte and the prefix kilo-, mega-, giga-, etc.

 Kilobytes (KB)= 1000 bytesor= 1024 bytes (210 Byte)
  Megabytes (MB)= 1000 KBor= 1024 KB (210 KB)
  Gigabytes (GB)= 1000 MBor= 1024 MB (210 MB)
 Terabytes (TB) = 1000 GB or= 1024 GB (210 GB)

In fact, both different interpretations occur in practice. The latter variant also has its own prefixes: KiB (Kibibyte), MiB (Mebibyte), GiB (Gibibyte), TiB (Tebibyte). Strictly speaking, this should always be used if the prefixes with a factor of 1024 are understood.

For the user it is sufficient to understand the prefixes kilo-, mega, etc. (SI * -prefixes) with a factor of 1000 to the previous one.

*) international system of units - since the byte is not an SI unit, the prefixes were not always understood in a uniform manner.

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