Processing device, processing method, and program

Patent metadata

Field	Value
Publication number	US-11044571-B2
Application number	US-202016817257-A
Country	US
Kind code	B2
Filing date	Mar 12, 2020
Priority date	Sep 27, 2017
Publication date	Jun 22, 2021
Grant date	Jun 22, 2021

Abstract

A filter determination system, a filter determination device, a filter determination method and a program with which a filter can be appropriately determined are provided.A processing device according to this embodiment includes a frequency response acquisition unit that acquires a frequency response of a filter for an audio signal, a smoothing unit that smoothes the frequency response and obtains a smoothed response, a candidate point determination unit that determines candidate split points based on a bottom position of the smoothed response, and a split point determination unit that determines one or more band split points from the candidate split points.

First claim

What is claimed is:

1. A processing device comprising:
a storage medium configured to store a program; and
at least one processor coupled to the storage medium and configured to execute the program to:
acquire a frequency response of a filter for an audio signal;
smooth the frequency response and obtain a smoothed response;
determine a plurality of candidate split points based on a bottom position as a local minimum amplitude of the smoothed response; and
determine one or more band split points based on the plurality of candidate split points.

2. The processing device according to claim 1 , wherein the at least one processor is further configured to determine the band split point based on a value of the smoothed response at the bottom position or a peak position adjacent to the bottom position.

3. The processing device according to claim 1 , wherein the at least one processor is further configured to:
split a reproduced signal into frequency bands at the band split point;
calculate a parameter based on the reproduced signal split into frequency bands; and
perform dynamic range compression of the reproduced signal by using the parameter.

4. The processing device according to claim 3 , wherein the dynamic range compression is performed on the reproduced signal on which out-of-head localization has been performed using the filter.

5. A processing method comprising:
a step of acquiring a frequency response of a filter for an audio signal;
a step of smoothing the frequency response and obtaining a smoothed response;
a step of determining a plurality of candidate split points based on a bottom position as a local minimum amplitude of the smoothed response; and
a step of determining one or more band split points based on the plurality of candidate split points.

6. A non-transitory computer readable medium storing a program causing a computer to execute a processing method comprising:
a step of acquiring a frequency response of a filter for an audio signal;
a step of smoothing the frequency response and obtaining a smoothed response;
a step of determining a plurality of candidate split points based on a bottom position as a local minimum amplitude of the smoothed response; and
a step of determining one or more band split points based on the plurality of candidate split points.

Assignees

• Jvckenwood Corp

Inventors

• TAKACHI Kuniaki
• Murata Hisako
• Fujii Yumi
• GEJO Takahiro
• Konishi Masaya

Classifications

• H04S7/307 Primary

  Frequency adjustment, e.g. tone control (H04S7/301 takes precedence) · CPC title

• H04S2420/07

  Synergistic effects of band splitting and sub-band processing · CPC title

• G10K15/00

  Acoustics not otherwise provided for · CPC title

• H04S2420/01

  Enhancing the perception of the sound image or of the spatial distribution using head related transfer functions [HRTF's] or equivalents thereof, e.g. interaural time difference [ITD] or interaural level difference [ILD] · CPC title

• H04S1/007

  in which the audio signals are in digital form (data reduction aspects thereof based on psychoacoustics G10L19/02) · CPC title