Method of improving sound quality and headset thereof
Disclosed is a headset including at least one in-ear microphone; at least one out-ear microphone; a control unit including an in-ear signal processing module for extracting low frequency components from a signal sensed through the in-ear microphone, an out-ear signal processing module for extracting high frequency components from a signal sensed through the out-ear microphone, and a mixing module for mixing the extracted low frequency components and high frequency components and outputting the mixed signal; and a communication unit for transmitting the signal output from the mixing module of the control unit to an external device, and sound quality can be improved by removing noises in a voice signal of a user transferred through the headset and creating a signal close to the voice of the user.
1. A headset comprising:
at least one in-ear microphone;
at least one out-ear microphone;
a control unit including:
an in-ear signal processing module for extracting low frequency components from a signal sensed through the in-ear microphone,
an out-ear signal processing module for extracting high frequency components from a signal sensed through the out-ear microphone, and
a mixing module for mixing the extracted low frequency components and high frequency components and outputting the mixed signal; and
a communication unit for transmitting the signal output from the mixing module of the control unit to an external device;
wherein the at least one out-ear microphone includes a first out-ear microphone provided in a first head of the headset and a second out-ear microphone provided in a second head of the headset, and the out-ear signal processing module includes a beamforming module for performing a beamforming process of sensing only a voice emitted from a user by removing a signal having a time difference from two signals output from the first out-ear microphone and the second out-ear microphone;
wherein the out-ear signal processing module further includes a noise suppression module for removing noises from a signal output from the beamforming module; and
wherein the in-ear signal processing module includes a voice activity detection (VAD) module for determining, if there is a signal sensed through the in-ear microphone, that a user is emitting a voice, and the noise suppression module operates only when it is determined by the VAD module that the user is emitting a voice.
2. The headset according to claim 1 , wherein the in-ear signal processing module includes a voice activity detection (VAD) module for determining, if there is a signal sensed through the in-ear microphone, that a user is emitting a voice, and the mixing module operates only when it is determined by the VAD module that the user is emitting a voice.
3. The headset according to claim 1 , wherein the in-ear signal processing module includes an enhancing module for balancing a signal by increasing a high frequency sound and decreasing a low frequency sound of a signal output from the in-ear microphone before the low frequency components are extracted.
4. A method of improving sound quality of a headset provided with at least one in-ear microphone and at least one out-ear microphone, the method comprising the steps of:
extracting low frequency components from a signal sensed through the in-ear microphone;
extracting high frequency components from a signal sensed through the out-ear microphone; and
mixing and outputting the extracted low frequency components and high frequency components;
wherein before the step of extracting high frequency components,
performing a beamforming process of extracting only a voice emitted from a user by removing a signal having a time difference from signals output from a first out-ear microphone provided in a first head of the headset and a second out-ear microphone provided in a second head of the headset;
determining, if there is a signal sensed through the in-ear microphone, that the user is emitting a voice; and
removing noises from a signal output as a result of performing the beamforming process,
wherein the step of removing noises is performed only when it is determined that the user is emitting a voice.
5. The method according to claim 4 , wherein further comprising, before the step of extracting low frequency components, the enhancing step of balancing a signal by increasing a high frequency sound and decreasing a low frequency sound of a signal output from the in-ear microphone.