CROSS-REFERENCE TO RELATED APPLICATION(S)

This application is based on and claims priority under 35 U.S.C. § 119 to Korean Patent Application No. 10-2019-0001044, filed on Jan. 4, 2019, in the Korean Intellectual Property Office, the disclosure of which is incorporated by reference herein its entirety.

BACKGROUND

1. Field

The disclosure relates to audio signal processing of an electronic device.

2. Description of Related Art

An electronic device may provide a function associated with audio signal processing. For example, the electronic device may provide a user function such as a phone call for converting sound to an audio signal, and transmitting the audio signal, and a recording function for converting sound to an audio signal and recording the audio signal. When the environment around the electronic device is noisy during a phone call, the audio signal will represent, both the user's voice, and noise. Furthermore, when a lot of ambient noise is present while the electronic device is recording, the noise and voice are recorded together. During playback, it is difficult to distinguish the voice from the noise.

The above information is presented as background information only to assist with an understanding of the disclosure. No determination has been made, and no assertion is made, as to whether any of the above might be applicable as prior art with regard to the disclosure.

SUMMARY

In accordance with an aspect of the disclosure, an electronic device comprises at least one processor configured to: receive a first audio signal and a second audio signal; detect a spectral envelope signal from the first audio signal and extract a feature point from the second audio signal; extend a high-band of the second audio signal based on the spectral envelope signal from the first audio signal and the feature point from the second audio signal to generate a high-band extension signal; and mix the high-band extension signal and the first audio signal, thereby resulting in a synthesized signal.

In accordance with another aspect of the disclosure, an audio signal processing method of an electronic device comprises: receiving a first audio signal from a first microphone among a plurality of microphones and obtaining a second audio signal through a second microphone among the plurality of microphones; detecting a spectral envelope signal from the first audio signal and extracting a feature point from the second audio signal; extending a high-band signal of the second audio signal based on the spectral envelope signal and the feature point to generate a high-band extension signal; and mixing the high-band extension signal and the first audio signal.

In accordance with another aspect of the disclosure an electronic device comprises a first microphone, a communication circuit and a processor operatively connected to the first microphone and the communication circuit, wherein the processor is configured to: obtain a first audio signal through the first microphone; identify a noise level of the first audio signal obtained by the first microphone; when the noise level exceeds a specified value, activating a second microphone configured to generate a second audio signal through the communication circuit; when obtaining the second audio signal, extract a feature point from the second audio signal; extend a high-band portion of the second audio signal based on the feature point and a spectral envelope signal extracted from the first audio signal; and mixing the high-band extension signal and the first audio signal.

Other aspects, advantages, and salient features of the disclosure will become apparent to those skilled in the art from the following detailed description, which, taken in conjunction with the annexed drawings, discloses certain embodiments of the disclosure.

