US 11,792,578 B2
Cochlear stimulation system with an improved method for determining a temporal fine structure parameter
Manuel Segovia Martinez, Vallauris (FR); Julian Skovgaard, Smørum (DK); Pierre Stahl, Vallauris (FR); Kai Dang, Vallauris (FR); and Aswin Wijetillake, Smørum (DK)
Assigned to Oticon Medical A/S, Smørum (DK)
Filed by Oticon Medical A/S, Smørum (DK)
Filed on Jul. 30, 2019, as Appl. No. 16/525,799.
Claims priority of application No. 8186527 (EP), filed on Jul. 31, 2018.
Prior Publication US 2020/0045480 A1, Feb. 6, 2020
Int. Cl. H04R 25/00 (2006.01)
CPC H04R 25/505 (2013.01) [H04R 25/606 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A cochlear stimulation system for determining a Temporal Fine Structure parameter of a spectral component of the full frequency range of a sampled audio signal, the system comprising:
a transducer configured for receiving an incoming acoustic signal, and wherein a sampled audio signal of length N samples is provided based on the incoming acoustic signal,
an electrode array including a plurality of electrodes,
a storing unit including a plurality of window frequency differences and a plurality of window energy level differences generated based on a window spectrum of an N length window function, and
a window analyzer for providing a plurality of spectrum samples, where the plurality of spectrum samples are provided
by performing a multiplication of the sampled audio signal with the window function in time domain, and performing a time to frequency transformation of the multiplied sampled audio signal, or
by performing a time to frequency transformation of the sampled audio signal and the window function, and performing a convolution of the window function in frequency domain and the sampled audio signal in frequency domain, and
a signal processor for estimating the Temporal Fine Structure parameter of the full frequency range of the sampled audio signal by
locating a main spectrum sample having a maximum energy level of the plurality of spectrum samples provided by the window analyzer,
estimating, for a group of spectrum samples of the plurality of spectrum samples, an energy level difference for one or more of the spectrum samples of the group, the energy level difference being determined between neighboring samples of the group, and wherein each of the spectrum samples of the group has a frequency within a range of frequencies centered around the main spectrum sample,
estimating a frequency difference, for one or more of the energy level differences of the group of spectrum samples, based on the plurality of window frequency differences and the plurality of window energy level differences, and
determining the Temporal Fine Structure parameter based on the frequency difference for one or more of the energy level difference of the group of spectrum samples,
wherein each of the plurality of electrodes is configured to provide an electrical stimulation based on the Temporal Fine Structure parameter.