FIELD: physics.
SUBSTANCE: quantising apparatus that quantises a value related to transformation coefficients when performing a principal component analysis transformation of a first vector signal and a second vector signal, the apparatus comprising: a power and correlation calculating section that calculates power of the first vector signal, power of the second vector signal and a correlation value between the first vector signal and the second vector signal; an intermediate value calculating section that calculates, as an intermediate value, a result of performing a difference computation using the power of the first vector signal and the power of the second vector signal; a codebook that holds a plurality of pairs of a first coefficient and a second coefficient, which are related to the transformation coefficients and numbered; and a quantising section that calculates, as a reference value, an addition result of a first multiplication result acquired by multiplying the first coefficient by the correlation value and a second multiplication value acquired by multiplying the second coefficient by the intermediate value, and, based on magnitude of the reference value, selects the number as a code.
EFFECT: reduced computation load when quantising values.
5 cl, 5 dwg
