Frequency characteristics converting apparatus, method and program for the same
AssigneeNippon Telegraph and Telephone Corporation
InventorsKazunori KOBAYASHI, Shoichiro SAITO
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Abstract
Provided are a frequency characteristics converting apparatus, a frequency characteristics converting method, and a program that make natural reproduced sound of a speaker compatible with howling prevention. In the frequency characteristics converting apparatus, a sound emitter is located at a first position on an inside of a vehicle, and in response to an increase in magnitude of noise at the first position, volume of target sound, collected by a sound collector installed at a second position, is increased when the target sound is emitted by the sound emitter, and a degree of signal processing that is applied to the target sound is increased.
Claims8
A frequency characteristics converting apparatus comprising processing circuitry configured to, in response to an increase in magnitude of noise at a first position in a vehicle, increase volume of a target sound in emitting the target sound by a sound emitter and increase a degree of a signal processing applied to the target sound, the sound emitter being located at the first position, the target sound being collected by a sound collector installed at a second position.
A frequency characteristics converting apparatus comprising processing circuitry configured to, in response to an increase in magnitude of noise at a third position in a vehicle, increase volume of a target sound in emitting the target sound by a sound emitter and increase a degree of a signal processing applied to the target sound, the sound emitter being located at a first position in the vehicle, the target sound being collected by a sound collector installed at a second position, the first position and the third position being different positions.
A frequency characteristics converting apparatus comprising:
- processing circuitry and memory, wherein
- the memory holds N change settings each formed of a combination of a threshold value and a frequency characteristic representing a relationship between a frequency and a gain, N being any integer of 2 or more, and
- the processing circuitry is configured to:
- estimate magnitude of noise at a first position on an inside of a vehicle;
- select one change setting out of the N change settings based on a magnitude relationship between an estimated value of the magnitude of the noise and the threshold value;
- and
- change a frequency characteristic of a collected-sound signal, collected by a sound collector installed at a second position, based on a frequency characteristic corresponding to the selected change setting.
A frequency characteristics converting method, implemented by a frequency characteristics converting apparatus that includes processing circuitry, wherein the processing circuitry, in response to an increase in magnitude of noise at a first position in a vehicle, increases volume of a target sound in emitting the target sound by a sound emitter and increases a degree of a signal processing applied to the target sound, the sound emitter being located at the first position, the target sound being collected by a sound collector installed at a second position.
A frequency characteristics converting method, implemented by a frequency characteristics converting apparatus that includes processing circuitry, wherein the processing circuitry, in response to an increase in magnitude of noise at a third position in a vehicle, increases volume of a target sound in emitting the target sound by a sound emitter and increases a degree of a signal processing applied to the target sound, the sound emitter being located at a first position in the vehicle, the target sound being collected by a sound collector installed at a second position, the first position and the third position being different positions.
Dependencies are inferred from the claim text.