In telecommunications and computing, bit rate (sometimes written bitrate, data rate or as a variable R) is the number of bits that are conveyed or processed per unit of time.
The bit rate is quantified using the bits per second (bit\/s or bps) unit, often in conjunction with an SI prefix such as kilo- (kbit\/s or kbps), mega- (Mbit\/s or Mbps), giga- (Gbit\/s or Gbps) or tera- (Tbit\/s or Tbps). Note that, unlike many other computer-related units, 1 kbit\/s is traditionally defined as 1,000-bit\/s, not 1,024-bit\/s, etc., also before 1999 when SI prefixes were introduced for units of information in the standard IEC 60027-2.
The formal abbreviation for "bits per second" is "bit\/s" (not "bits\/s", see writing style for SI units). In less formal contexts the abbreviations "b\/s" or "bps" are often used, though this risks confusion with "bytes per second" ("B\/s", "Bps"). 1 Byte\/s (Bps or B\/s) corresponds to 8-bit\/s (bps or b\/s).
We often mention bit rate, let us refer bit rate in multimedia;
In digital multimedia, bit rate often refers to the number of bits used per unit of playback time to represent a continuous medium such as audio or video after source coding (data compression). The encoding bit rate of a multimedia file is the size of a multimedia file in bytes divided by the playback time of the recording (in seconds), multiplied by eight.
For realtime streaming multimedia, the encoding bit rate is the goodput that is required to avoid interrupt:
Encoding bit rate = Required goodput
The term average bitrate is used in case of variable bitrate multimedia source coding schemes. In this context, the peak bit rate is the maximum number of bits required for any short-term block of compressed data.
A theoretical lower bound for the encoding bit rate for lossless data compression is the source information rate, also known as the entropy rate.Entropy rate ≤ Multimedia bit rate

Audio and video glossary. 2014.

Look at other dictionaries:

  • Bit rate — Bit rates Decimal prefixes (SI) Name Symbol Multiple kilobit per second kbit/s 103 megabit per second Mbit/s 106 gigabit per second Gbit/s 109 …   Wikipedia

  • bit-rate — bitˈ rate noun The rate of transmission of bits, usu measured in bits per second • • • Main Entry: ↑bit …   Useful english dictionary

  • Bit Rate — VP This a unit of measurement used to assess the transfer of data per unit over time. WikiV a) The rate at which the compressed bit stream is delivered from the storage medium to the input of a decoder. The digital equivalent of analog bandwidth …   Audio and video glossary

  • Bit rate — En telecomunicación e informática, el término bit rate (en español, velocidad binaria) es la velocidad a la cual se transmiten los bit vía radio o cable. Así pues, el bit rate es la velocidad de transferencia de datos. Además de bit rate y… …   Enciclopedia Universal

  • bit rate — ● ►en lof. m. ►NETATM►COMM Quantité moyenne de bits transitant sur un réseau. C est une mesure de son débit. Les quatre variantes ABR (Available Bit Rate), UBR (Unspecified Bit Rate), CBR (Constant Bit Rate) et VBR (Variable Bit Rate) sont… …   Dictionnaire d'informatique francophone

  • Bit rate — Débit binaire Pour les articles homonymes, voir bps. Le débit binaire mesure une quantité de données numériques transmises en bits par seconde (bit/s, b/s ou bps). Ses principaux multiples sont : le kilobit par seconde (symbole kbit/s)… …   Wikipédia en Français

  • bit rate — pralaidumas statusas T sritis informatika apibrėžtis Ryšio linijos arba kanalo pajėgumas praleisti tam tikrą duomenų kiekį per laiko vienetą. Matuojamas bitais (kilobitais, megabitais) per sekundę (b/s, Kb/s, Mb/s), kartais baitais (kilobaitais,… …   Enciklopedinis kompiuterijos žodynas

  • Bit Rate — Die Datenübertragungsrate (auch Datentransferrate, Datenrate oder umgangssprachlich Verbindungsgeschwindigkeit, Übertragungsgeschwindigkeit, und nicht ganz zutreffend auch „Kapazität“, „Bandbreite“ genannt) bezeichnet die digitale Datenmenge, die …   Deutsch Wikipedia

  • bit rate —    The rate at which bits are transmitted over a communications channel, described in terms of bits per second (bps).    See also baud rate …   Dictionary of networking

  • bit rate — noun The transmission rate of binary symbols (‘0’ and ‘1’), equal to the total number of bits transmitted in one second sent or received across a network or communications channel, abbreviated as bps (bits per second), a measure of data… …   Wiktionary

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