公开(公告)号：US11503406B2

公开(公告)日：2022-11-15

申请号：US17378590

申请日：2021-07-16

Applicant: JVCKENWOOD Corporation

Inventor： Yumi Fujii ,  Hisako Murata ,  Kuniaki Takachi ,  Takahiro Gejo ,  Mayo Iiyama

IPC: H04R3/04 ,  H04R5/033 ,  H04R5/04

Abstract: A processor, an out-of-head localization filter generation method, and a program capable of performing appropriate processing are provided. An out-of-head localization filter determination device according to this embodiment includes a built-in microphone embedded in an output unit, a measurement unit configured to output a measurement signal to the output unit and measure a sound pickup signal output from the built-in microphone, a frequency characteristics acquisition unit configured to convert the sound pickup signal into a frequency domain and acquire first frequency characteristics, a conversion unit configured to convert the first frequency characteristics into second frequency characteristics by applying a representative conversion function to the first frequency characteristics, and an inverse filter calculation unit configured to calculate an inverse filter based on the second frequency characteristics.

公开(公告)号：US11470422B2

公开(公告)日：2022-10-11

申请号：US17372365

申请日：2021-07-09

Applicant: JVCKENWOOD Corporation

Inventor： Yumi Fujii ,  Hisako Murata ,  Kuniaki Takachi ,  Takahiro Gejo ,  Mayo Iiyama

IPC: H04R5/033 ,  H04R5/027 ,  H04R5/04 ,  H04S7/00

Abstract: An out-of-head localization filter determination system according to this embodiment includes a microphone unit that is worn on a user's ear and picks up sounds output from an output unit, a measurement unit that measures a sound pickup signal output from the microphone unit, a data storage unit that stores first preset data related to spatial acoustic transfer characteristics and second preset data related to ear canal transfer characteristics in association with each other, a frequency characteristics acquisition unit that converts the sound pickup signal into a frequency domain and acquires frequency characteristics, an extreme value extraction unit that extracts a local maximum value and a local minimum value of the frequency characteristics, and an envelope calculation unit that calculates first envelope data and second envelope data by interpolating each of the local maximum value and the local minimum value.