Bit rate

In telecommunications and computing, bit rate (sometimes written bitrate 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 unit (symbol: "bit/s"), often in conjunction with an SI prefix such as "kilo" (1 kbit/s = 1000 bit/s), "mega" (1 Mbit/s = 1000 kbit/s), "giga" (1 Gbit/s = 1000 Mbit/s) or "tera" (1 Tbit/s = 1000 Gbit/s). The non-standard abbreviation "bps" is often used to replace the standard symbol "bit/s", so that, for example, "1 Mbps" is used to mean one million bits per second.

One byte per second (1 B/s) corresponds to 8 bit/s.

Prefixes

When quantifying large bit rates, SI prefixes (also known as metric prefixes or decimal prefixes) are used, thus:

Binary prefixes are sometimes used for bit rates . The International Standard (IEC 80000-13) specifies different abbreviations for binary and decimal (SI) prefixes (e.g. 1 KiB/s = 1024 B/s = 8192 bit/s, and 1 MiB/s = 1024 KiB/s).

In data communications

Rate

Rate may refer to:

Science and finance

Human growth

Other uses

Rates (tax)

Rates are a type of property tax system in the United Kingdom, and in places with systems deriving from the British one, the proceeds of which are used to fund local government. Some other countries have taxes with a more or less comparable role, for example France's taxe d'habitation.

Rates by country

Australia

Local government authorities levy annual taxes, which are called council rates or shire rates. The basis on which these charges can be calculated varies from state to state, but is usually based in some way on the value of property. Even within states, individual local government authorities can often choose the specific basis of rates - for example, it may be on the rental value of property (as in Western Australia) or on the unimproved land value (as in New South Wales). These rateable valuations are usually determined by a statutory authority, and are subject to periodic revision.

Canada

Rates are referred to as property taxes in Canada. These taxes are collected primarily by municipal governments on residential, industrial and commercial properties and are their main source of funding.

Rates (Póvoa de Varzim)

Rates (Portuguese pronunciation: [ˈʁatɨʃ]) is a Portuguese parish and a former township located in the municipality of Póvoa de Varzim. The population in 2011 was 2,505, in an area of 13.90 km². The township has records dating to the 13th century and, still today, it preserves landmarks such as the townsquare and a well-preserved and notable Romanesque temple.

History

Rates is a medieval township that developed around the Monastery of Rates, established by Henry, Count of Portugal in 1100 AD on the site of an older temple dating to the 9th century or earlier and with sculpture elements dating to the Roman empire. A Roman road crossed near the monastery.

Rates naming seems pre-Roman in origin. The town gained importance due to the legend of Saint Peter of Rates, mythical first bishop of Braga and martyr while attempting to convert Roman pagans to Christianity, becoming in a central place in the Portuguese Way of Saint James and the local myth was used by Braga archbishops to justify their primacy in Hispania.