Patent ID: 11956604
Assignee: ALPS ALPINE CO., LTD.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G  H | IPC H

Claim 2:
3. The in-vehicle communication support system according to claim 2, wherein:
a transfer function of the second filter and a transfer function of the third filter are set in advance, by causing a second adaptive filter to perform an adaptive operation with a difference between an output of the second adaptive filter having the output of the first filter as an input and an output of the first microphone delayed by a predetermined time as an error while outputting a predetermined tuning sound from the speech position of the user in the first seat, and setting a transfer function of the converged second adaptive filter as the transfer function of the second filter, and by causing a third adaptive filter to perform an adaptive operation with a difference between an output of the third adaptive filter having the output of the first microphone delayed by the predetermined time as an input and the output of the first filter as an error while outputting the predetermined tuning sound from the speech position of the user in the first seat, and setting a transfer function of the converged third adaptive filter as the transfer function of the third filter.