Lossless compression

Lossless compression is a class of data compression algorithms that allows the original data to be perfectly reconstructed from the compressed data. By contrast, lossy compression permits reconstruction only of an approximation of the original data, though this usually improves compression rates (and therefore reduces file sizes).

Lossless data compression is used in many applications. For example, it is used in the ZIP file format and in the GNU tool gzip. It is also often used as a component within lossy data compression technologies (e.g. lossless mid/side joint stereo preprocessing by the LAME MP3 encoder and other lossy audio encoders).

Lossless compression is used in cases where it is important that the original and the decompressed data be identical, or where deviations from the original data could be deleterious. Typical examples are executable programs, text documents, and source code. Some image file formats, like PNG or GIF, use only lossless compression, while others like TIFF and MNG may use either lossless or lossy methods. Lossless audio formats are most often used for archiving or production purposes, while smaller lossy audio files are typically used on portable players and in other cases where storage space is limited or exact replication of the audio is unnecessary.

Calgary

Calgary ⁱ/ˈkælɡᵊri/ is a city in the province of Alberta, Canada. It is situated at the confluence of the Bow River and the Elbow River in the south of the province, in an area of foothills and prairie, about 80 km (50 mi) east of the front ranges of the Canadian Rockies. In the 2011 census, the City of Calgary had a population of 1,096,833 and a metropolitan population of 1,214,839, making it the largest city in Alberta, and the third-largest municipality and fifth-largest census metropolitan area (CMA) in Canada.

The economy of Calgary includes activity in the energy, financial services, film and television, transportation and logistics, technology, manufacturing, aerospace, health and wellness, retail, and tourism sectors. The Calgary CMA is home to the second-highest number of corporate head offices in Canada among the country's 800 largest corporations.

Calgary anchors the south end of what Statistics Canada defines as the "Calgary–Edmonton Corridor".

In 1988, Calgary became the first Canadian city to host the Olympic Winter Games.

Calgary (disambiguation)

Calgary is a city in Alberta, Canada.

Calgary may also refer to:

See also

Calgary (N.W.T. electoral district)

Coordinates: 51°02′42″N 114°03′26″W / 51.04500°N 114.05722°W / 51.04500; -114.05722 Calgary was a territorial electoral district for the Legislative Assembly of Northwest Territories, Canada.

The riding was created by royal proclamation in 1884.

The riding was split into East Calgary, West Calgary and High River in 1894.

Members of the Legislative Assembly (MLAs)

Election results

1891 election

1888 election

1886 election

1884 election

See also

References

External links