Log Area Ratios (LAR) can be used to represent Reflection Coefficients (another form for Linear Prediction Coefficients) for transmission over a channel. While not as efficient as Line Spectral Pairs (LSPs), Log Area Ratios are much simpler to compute. Let be the kth reflection coefficient of a filter, the kth LAR is:
:
Use of Log Area Ratios have now been mostly replaced by Line Spectral Pairs, but older codecs, such as GSM-FR use LARs.
See also
Wikimedia Foundation. 2010.
Linear predictive coding — (LPC) is a tool used mostly in audio signal processing and speech processing for representing the spectral envelope of a digital signal of speech in compressed form, using the information of a linear predictive model. It is one of the most… … Wikipedia
LAR — может обозначать: Метод кодирования Log Area Ratios Альтернативное название белка PTPRF Список значений слова или словосочетания со ссылками на соответствую … Википедия
Naive Bayes classifier — A naive Bayes classifier is a simple probabilistic classifier based on applying Bayes theorem with strong (naive) independence assumptions. A more descriptive term for the underlying probability model would be independent feature model . In… … Wikipedia
WEIGHTS AND MEASURES — From the earliest period of their history the Jews were alive to the necessity of an accurate system of weights and measures, and an honest handling of them. The first legislation in the interest of economic righteousness in general is found in… … Encyclopedia of Judaism
analysis — /euh nal euh sis/, n., pl. analyses / seez /. 1. the separating of any material or abstract entity into its constituent elements (opposed to synthesis). 2. this process as a method of studying the nature of something or of determining its… … Universalium
Logarithm — The graph of the logarithm to base 2 crosses the x axis (horizontal axis) at 1 and passes through the points with coordinates (2, 1), (4, 2), and (8, 3) … Wikipedia
Dimensional analysis — In physics and all science, dimensional analysis is a tool to find or check relations among physical quantities by using their dimensions. The dimension of a physical quantity is the combination of the basic physical dimensions (usually mass,… … Wikipedia
Data transformation (statistics) — A scatterplot in which the areas of the sovereign states and dependent territories in the world are plotted on the vertical axis against their populations on the horizontal axis. The upper plot uses raw data. In the lower plot, both the area and… … Wikipedia
African music — Introduction the musical sounds and practices of all indigenous peoples of Africa, including the Berber in the Sahara and the San (Bushmen) and Khoikhoin (Hottentot) in Southern Africa. The music of European settler communities and that of… … Universalium
star — starless, adj. /stahr/, n., adj., v., starred, starring. n. 1. any of the heavenly bodies, except the moon, appearing as fixed luminous points in the sky at night. 2. Astron. any of the large, self luminous, heavenly bodies, as the sun, Polaris,… … Universalium
