Hearing aid with audio codec and method

摘要

A hearing aid (1a, 1b) comprising a time domain codec. The code comprises a decoder adapted to generate a decoded output signal based on an input quantization index and comprising a predictor (4) and a predictor adaptation (11) as well as a encoder for generating an output quantization index based on an input signal, said encoder comprising said decoder and a predictor (4) receiving an excitation signal and outputting a prediction signal. The output quantization index is determined by repeated decoding of the quantization indices in order to minimize the error between the input signal and the prediction signal, and the predictor adaptation (11) uses a recursive autocorrelation estimate for updating the predictor (4).The invention further provides a method of encoding an audio signal.