A-law - significado y definición. Qué es A-law
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Qué (quién) es A-law - definición

ALGORITHM
A-law; A law; Alaw; ALaw; A-Law
  • Plot of ''F''(''x'') for A-Law for ''A'' = 87.6
  • Graph of μ-law and A-law algorithms

A-law         
<standard> The <a href="">ITU-Ta> <a href="">standarda> for {nonuniform quantising logarithmic compression}. The equation for A-law is | A | ------- (m/mp) |m/mp| =< 1/A | 1+ln A y = | | sgn(m) | ------ (1 + ln A|m/mp|) 1/A =< |m/mp| =< 1 | 1+ln A Values of u=100 and 255, A=87.6, mp is the Peak message value, m is the current quantised message value. (The formulae get simpler if you substitute x for m/mp and sgn(x) for sgn(m); then -1 <= x <= 1.) Converting from <a href="">u-LAWa> to A-LAW introduces {quantising errors}. u-law is used in North America and Japan, and A-law is used in Europe and the rest of the world and international routes. [The Audio File Formats FAQ] (1995-02-21)
A-law algorithm         
An A-law algorithm is a standard companding algorithm, used in European 8-bit PCM digital communications systems to optimize, i.e.
A Manifesto for Labour Law         
Manifesto for Labour Law; A Manifesto for Labour Law: towards a comprehensive revision of workers’ rights; A Manifesto for Labour Law: towards a comprehensive revision of workers' rights
A Manifesto for Labour Law: towards a comprehensive revision of workers’ rights (Institute of Employment Rights, 2016) is a set of reform proposals for UK labour law, written by fifteen labour rights experts in academia and legal practice from the UK, Europe and the Commonwealth.Alan Bogg, Nicola Countouris, Ruth Dukes, Keith Ewing, Michael Ford QC, Mark Freedland QC, John Hendy QC, Phil James, Carolyn Jones, Aileen McColgan, Sonia McKay, Tonia Novitz, David Walters, David Whyte, and Frank Wilkinson.

Wikipedia

A-law algorithm

An A-law algorithm is a standard companding algorithm, used in European 8-bit PCM digital communications systems to optimize, i.e. modify, the dynamic range of an analog signal for digitizing. It is one of two versions of the G.711 standard from ITU-T, the other version being the similar μ-law, used in North America and Japan.

For a given input x {\displaystyle x} , the equation for A-law encoding is as follows:

where A {\displaystyle A} is the compression parameter. In Europe, A = 87.6 {\displaystyle A=87.6} .

A-law expansion is given by the inverse function:

The reason for this encoding is that the wide dynamic range of speech does not lend itself well to efficient linear digital encoding. A-law encoding effectively reduces the dynamic range of the signal, thereby increasing the coding efficiency and resulting in a signal-to-distortion ratio that is superior to that obtained by linear encoding for a given number of bits.

Ejemplos de uso de A-law
1. I think you shouldnt be a law–breaker and a law–maker, he said.
2. A law–governed State and an equal and civilised society cannot exist without a law–governed society. (VNA)
3. This is not a law that bypasses the High Court, but a law that bypasses Attorney General Menachem Mazuz.
4. "A law is a law, and it doesn‘t matter if it was passed by the City Council or by referendum.
5. Several activists attacked a law enforcement officer.