Signal processing apparatus, method, and system

Patent metadata

Field	Value
Publication number	US-12424196-B2
Application number	US-202217852980-A
Country	US
Kind code	B2
Filing date	Jun 29, 2022
Priority date	Dec 31, 2019
Publication date	Sep 23, 2025
Grant date	Sep 23, 2025

Abstract

A signal processing apparatus is configured to preprocess a sound wave signal and output a processed audio signal through an electromagnetic wave. The signal processing apparatus includes: a receiving unit, configured to receive at least one sound wave signal; a conversion unit, configured to convert the at least one sound wave signal to at least one audio signal; a positioning unit, configured to determine position information related to the at least one sound wave signal; a processing unit, configured to determine a sending time point of at least one audio signal based on the position information and a first time point, where the first time point is a time point at which the receiving unit receives the at least one sound wave signal; and a sending unit, configured to send the at least one audio signal through the electromagnetic wave.

First claim

What is claimed is:

1. A signal processing method for performing noise reduction processing, wherein the signal processing method is applied to a signal processing apparatus, the signal processing apparatus preprocesses a sound wave signal and outputs a processed audio signal through an electromagnetic wave, the signal processing method comprising:
receiving at least one sound wave signal;
converting the at least one sound wave signal to at least one audio signal;
determining position information related to the at least one sound wave signal;
determining a sending time point of the at least one audio signal based on the position information and a first time point, the first time point comprising a receiving time point at which the signal processing apparatus receives the at least one sound wave signal, the determining the sending time point comprising:
determining, based on a duration difference between a first duration and a second duration, the sending time point for sending the at least one audio signal so the at least one audio signal and the at least one sound wave signal arrive at an electronic device synchronously, the first duration comprising a ratio of a distance difference between a first distance and a second distance to a speed of sound, the second duration comprising a time difference between a second time point and the first time point, and the second time point comprising a receiving time point at which the electronic device receives the at least one audio signal;

determining the first distance between a sound source of the at least one sound wave signal and the electronic device and determining the second distance between the sound source of the at least one sound wave signal and the signal processing apparatus;
performing a transfer adjustment on the at least one sound wave signal based on the distance difference between the first distance and the second distance to determine a signal feature of the at least one audio signal, the signal feature comprising an amplitude feature; and
sending the at least one audio signal to the electronic device through the electromagnetic wave at the sending time point.

2. The method according to claim 1 , further comprising:
performing phase inversion processing on the at least one audio signal; and
the sending the at least one audio signal through the electromagnetic wave comprises:
sending, through the electromagnetic wave, the at least one audio signal on which phase inversion processing is performed.

3. The method according to claim 1 , further comprising:
determining the first distance and the second distance based on the position information.

4. The method according to claim 1 , wherein the determining, based on the duration difference between the first duration and the second duration, a sending time point for sending the at least one audio signal comprises:
when the first duration is greater than the second duration, determining, based on the duration difference between the first duration and the second duration, the sending time point for sending the at least one audio signal.

5. A signal processing method for performing noise reduction processing, the signal processing method is applied to an electronic device, the signal processing method comprising:
receiving at least one sound wave signal;
receiving at least one audio signal, a first time point, and first information through an electromagnetic wave from a signal processing apparatus, the first time point comprising a time point at which the signal processing apparatus receives the at least one sound wave signal, and the first information is position information related to the at least one sound wave signal;
determining a playing time point of the at least one audio signal based on the first time point and the first information, the at least one audio signal being provided for performing the noise reduction processing on the at least one sound wave signal, the determining the playing time point comprising:
determining a first distance between a sound source of the at least one sound wave signal and the electronic device, and determining a second distance between the sound source of the at least one sound wave signal and the signal processing apparatus; and
determining the playing time point based on a duration difference between a first duration and a second duration so that the electronic device plays the at least one audio signal when synchronously receiving the at least one sound wave signal; and

performing a transfer adjustment on the at least one audio signal based on a distance difference between the first distance and the second distance to determine a signal feature of the at least one audio signal, the signal feature comprising an amplitude feature.

6. The method according to claim 5 , further comprising:
performing phase inversion processing on the at least one audio signal.

7. The method according to claim 5 , further comprising determining the first distance and the second distance based on the first information; and
the first duration comprising a ratio of the distance difference between the first distance and the second distance to a speed of sound, the second duration is a time difference between a second time point and the first time point, and the second time point is a time point at which the at least one audio signal is received.

8. The method according to claim 5 , wherein the at least one audio signal comprises N audio signals, wherein N is a positive integer greater than 1; and the method further comprises:
calculating an arithmetic average value of M signals for a same sound source, wherein M is a positive integer not greater than N.

9. A signal processing apparatus for performing noise reduction processing, the signal processing apparatus comprising:
a microphone configured to receive at least one sound wave signal;
a communication interface;
a memory storing instructions; and
at least one processor in communication with the microphone, the communication interface, and the memory, the at least one processor configured, upon execution of the instructions, to perform the following steps:
convert the at least one sound wave signal to at least one audio signal;
determine position information related to the at least one sound wave signal;
determine a sending time point of the at least one audio signal based on the position information and a first time point, the first time point comprising a time point at which the microphone receives the at least one sound wave signal, the determining the sending time point comprising:
determine, based on a difference between a first duration and a second duration, a time point for sending the at least one audio signal so the at least one audio signal and the at least one sound wave signal arrive at an electronic device synchronously, the first duration comprising a ratio of the difference between a first distance and a second distance to a speed of sound, the second duration comprising a difference between a second time point and the first time point, and the second time point comprising a time point at which the electronic device receives the at least one audio signal;

determine the first distance between a sound source of the at least one sound wave signal and the electronic device and determining the second distance between the sound source of the at least one sound wave signal and the signal processing apparatus;
perform a transfer adjustment on the at least one sound wave signal based on a difference between the first distance and the second distance to determine a signal feature of the at least one audio signal, the signal feature comprising an amplitude feature; and
send the at least one audio signal to the electronic device

Assignees

• Huawei Tech Co Ltd

Inventors

• Yuan Tingqiu
• Zhang Libin
• Zhang Huimin
• Liu Chang

Classifications

• G10K2210/3055

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• G10K2210/3044

  Phase shift, e.g. complex envelope processing · CPC title

• G10K2210/3027

  Feedforward · CPC title

• G10K2210/3026

  Feedback · CPC title

• G10K2210/1081

  Earphones, e.g. for telephones, ear protectors or headsets · CPC title