Patent ID: 9318123
Filing Date: 2016-04-19
CPC Classification: G10L,H04M

Claim Text:
1. An apparatus for reproducing sound, the apparatus comprising: a sound signal generator configured to generate a sound signal by receiving sound from around the apparatus; a signal processor configured to perform a process on a residual signal that is obtained by canceling a feedback signal from the sound signal; a coefficient determiner configured to determine a linear prediction coefficient that is adaptively adjusted according to the residual signal; a first linear predictor configured to output a first prediction signal by linearly predicting the residual signal according to the determined linear prediction coefficient; a second linear predictor configured to output a second prediction signal by linearly predicting the sound signal that is processed by the signal processor, according to the determined linear prediction coefficient; and a feedback signal canceler configured to estimate a path of the feedback signal according to an algorithm for canceling a feedback signal using the first and second prediction signals, and to cancel the feedback signal from the sound signal generated by the sound signal generator using the estimated path of the feedback signal, wherein the feedback signal canceller comprises: wherein the convergence speed adjustor is configured to adjust the convergence speed using a ratio of a first autocorrelation at a first time difference to a second autocorrelation at a second time difference.