Method and apparatus for improving signal-to-noise ratio of microphone signal
AssigneeYealink (Xiamen) Network Technology Co., Ltd.
InventorsLang Wu, Jiaxiang Liao, Chaofan Zeng
Life of this patent
Estimating the term…
Abstract
Disclosed are a method and apparatus for improving a signal-to-noise ratio of a microphone signal. The method includes: selecting a target microphone to be improved as a first microphone, and selecting a microphone whose signal-to-noise ratio is greater than a signal-to-noise ratio of the first microphone and exceeds a preset first threshold as a second microphone; and adding, by an adder, a voice signal of the first microphone and a voice signal of the second microphone in a case that a same voice signal is inputted, to obtain a first microphone signal whose signal-to-noise ratio has been improved.
Claims10
A method for improving a signal-to-noise ratio of a microphone signal, comprising:
- selecting a target microphone to be improved as a first microphone, and selecting a microphone whose signal-to-noise ratio is greater than a signal-to-noise ratio of the first microphone and exceeds a preset first threshold as a second microphone;
- and
- adding, by an adder, a voice signal of the first microphone and a voice signal of the second microphone in a case that a same voice signal is inputted, to obtain a first microphone signal whose signal-to-noise ratio has been improved;
- wherein the adding, by an adder, a voice signal of the first microphone and a voice signal of the second microphone in a case that a same voice signal is inputted comprises:
- using frequency selective filters to respectively select a target frequency band voice signal of the first microphone and a target frequency band voice signal of the second microphone, in a case that the same voice signal is inputted;
- wherein the target frequency band voice signal of the first microphone is selected according to a frequency band that needs to be output, and the target frequency band voice signal of the second microphone is selected according to a particular frequency band to be improved;
- and
- adding, by the adder, the target frequency band voice signal of the first microphone and the target frequency band voice signal of the second microphone, to obtain the first microphone signal whose signal-to-noise ratio has been improved.
A method for improving a signal-to-noise ratio of a microphone signal, comprising:
- selecting a target microphone to be improved as a first microphone, and selecting a microphone whose signal-to-noise ratio is greater than a signal-to-noise ratio of the first microphone and exceeds a preset first threshold as a second microphone;
- and
- adding, by an adder, a voice signal of the first microphone and a voice signal of the second microphone in a case that a same voice signal is inputted, to obtain a first microphone signal whose signal-to-noise ratio has been improved;
- wherein the adding, by an adder, a voice signal of the first microphone and a voice signal of the second microphone in a case that a same voice signal is inputted comprises:
- adding, by the adder, an entire frequency band voice signal of the first microphone and an entire frequency band voice signal of the second microphone, to obtain the first microphone signal whose signal-to-noise ratio has been improved.
An apparatus for improving a signal-to-noise ratio of a microphone signal, comprising:
- a microphone selection module, configured to select a target microphone to be improved as a first microphone, and select a microphone whose signal-to-noise ratio is greater than a signal-to-noise ratio of the first microphone and exceeds a preset first threshold as a second microphone;
- and
- a first signal-to-noise ratio improvement module, configured to add, by an adder, a voice signal of the first microphone and a voice signal of the second microphone in a case that a same voice signal is inputted, to obtain a first microphone signal whose signal-to-noise ratio has been improved;
- wherein the first signal-to-noise ratio improvement module comprises:
- a target frequency band first signal-to-noise ratio improvement module, configured to use frequency selective filters to respectively select a target frequency band voice signal of the first microphone and a target frequency band voice signal of the second microphone, in a case that the same voice signal is inputted;
- and add, by the adder, the target frequency band voice signal of the first microphone and the target frequency band voice signal of the second microphone, to obtain a first microphone signal whose signal-to-noise ratio has been improved;
- wherein the target frequency band voice signal of the first microphone is selected according to a frequency band that needs to be output, and the target frequency band voice signal of the second microphone is selected according to a particular frequency band to be improved.
Dependencies are inferred from the claim text.