SNR Adjusted Envelope Sampling for Hearing Implants

摘要

A signal processing system is described for a hearing implant system. A band pass filter bank processes an audio input signal to generate band pass signals. An implant signal processor processes the band pass signals to generate electrode stimulation signals. The processing includes: i. monitoring a key feature characteristic of the audio input signal, ii. using an original coding strategy to generate the electrode stimulation signals when the key feature is less than or equal to an initial value, and iii. using a different new coding strategy to generate the electrode stimulation signals when the key feature is greater than or equal to a coding change value. The implant signal processor automatically transitions from the original coding strategy to the new coding strategy over a transition period of time by adaptively changing the original coding strategy to become the new coding strategy.

主权项

1. A signal processing system for a hearing implant system having an implanted electrode array with a plurality of stimulation contacts for delivering electrode stimulation signals to adjacent auditory neural tissue, the system comprising:
a band pass filter bank configured for processing an audio input signal to generate a plurality of band pass signals each representing an associated band of audio frequencies in the audio input signal; and an implant signal processor configured for processing the band pass signals to generate the electrode stimulation signals, wherein the processing includes:
i. monitoring a key feature characteristic of the audio input signal,ii. using an original coding strategy to generate the electrode stimulation signals when the key feature is less than or equal to an initial value, andiii. using a different new coding strategy to generate the electrode stimulation signals when the key feature is greater than or equal to a coding change value; wherein the implant signal processor is configured for automatically transitioning from the original coding strategy to the new coding strategy over a transition period of time during which the implant signal processor adaptively changes the original coding strategy to become the new coding strategy.