Audio processing compression system using level-dependent channels

摘要

Disclosed herein, among other things, are methods and apparatus for a level-dependent compression system for hearing assistance devices, such as hearing aids. The present subject matter includes a hearing assistance device having a buffer for receiving time domain input signals and a frequency analysis module to convert time domain input signals into a plurality of subband signals. A power detector is adapted to receive the subband signals and to provide a subband version of the input signals. A nonlinear gain stage applies gain to the plurality of subband versions of the input signals, and a frequency synthesis module processes subband signals from the nonlinear gain stage and to create a processed output signal. The device also includes a filter for filtering the signals, and a level-dependent compression module. The level-dependent compression module is adapted to provide bandwidth control to the plurality of subband signals produced by the frequency analysis stage.

主权项

1. A hearing assistance device, comprising:
a buffer adapted for receiving time-domain input signals; a frequency analysis module adapted to convert the time domain input signals into a plurality of subband signals; a power detector adapted to receive the subband signals and to provide a subband version of the input signals; a nonlinear gain stage adapted to apply gain to the plurality of subband versions of the input signals; a frequency synthesis module adapted to process subband signals from the nonlinear gain stage and to create a processed output signal; a filter for filtering the input signals and the output signal; and a level-dependent compression module adapted to adjust width of subbands based on a function of the detected power in the plurality of subband signals produced by the frequency analysis module.