Linear prediction device of the speech signal, linear prediction method of speech signal

摘要

[Challenge] asked to facilitate the weighting factor at the time of linear prediction, linear prediction device that can reduce the amount of signal at the time of encoding to obtain a high prediction accuracy, provides a method. Linear prediction apparatus A voice signal 1 calculates a weighting factor for calculating a prediction error signal value of the audio signal, weighting the calculated weighting factor for weighting by applying to each of the audio signals a setting unit 3, were weighted by weighting coefficients, and a prediction unit 4 for calculating a predicted value of the audio signal by using the time series signal of the past, the weighting setting unit 3, an audio signal to calculate a predicted value past a plurality of audio signals in one series as the same series, it sets the weighting factor to each of the plurality of past audio signals in other sequences correlated with one of the sequence, the prediction unit 4, the weighting calculates the predicted value using a past plurality of audio signals of a plurality of past audio signals and other sequences of one series are.FIELD 1