Speech enhancement method and device for mobile phones

A speech enhancement device for mobile phones, a main microphone being provided on the bottom of a mobile phone, one or more auxiliary microphones being provided in the mobile phone at a position far away from the main microphone, characterized in that the device comprises a detection unit and a denoising unit, wherein:

• the detection unit is configured to judge whether a user is talking or listening according to signals from both the main microphone and the auxiliary microphones, wherein the judging whether the user is talking or listening according to signals from both the main microphone and the auxiliary microphones includes the following steps of:
• calculating a correlation value between the signal from the main microphone and the signal from the auxiliary microphones;
• judging that the user is talking if the correlation value is greater than a first threshold;
• and
• judging that the user is listening if the correlation value is less than or equal to the first threshold;
• further detect the mobile phone holding state of the user, i.e., whether the user holds the mobile phone normally or abnormally, and notify the denoising unit with the result of detection, when judging that the user is talking;
• and, do no further operation, and allow the denoising unit to keep the previous speech enhancement solution unchanged, when judging that the user is listening;
• and
• the denoising unit is configured to, when receiving a notification indicating that the user holds the mobile phone normally, employ a solution integrating multi-microphone denoising and single-microphone denoising to perform speech enhancement;
• and, when receiving a notification indicating that the user holds the mobile phone abnormally, employ a solution of single-microphone denoising only to perform speech enhancement.