Audio enhancement method and apparatus, and computer storage medium

An audio enhancement apparatus, the apparatus comprising a non-transitory computer storage medium having stored therein one or more executable instructions that, when executed by a processor, perform the following steps:

• generating a group of audio collection signals using a microphone array, wherein each audio collection signal in the group of audio collection signals is generated by one microphone in the microphone array, and each microphone in the microphone array is spaced apart from others;
• performing a delay-and-sum processing on the group of audio collection signals to generate a delay-and-sum signal YDSB(k,l), wherein k represents a frequency bin and l represents a frame index;
• performing a blocking-matrix processing on the group of audio collection signals to generate a blocking-matrix signal YBM(k,l);
• performing a filtering processing on the blocking-matrix signal YBM(k,l) using an adaptive filtering matrix WANC, and removing the filtered blocking-matrix signal from the delay-and-sum signal YDSB(k,l) to obtain an enhanced audio output signal YOUT(k,l);
• wherein the adaptive filtering matrix WANC is a weight coefficient matrix which is based on at least one attenuation function μ(t) and varies with the audio output signal YOUT(k,l) and the blocking-matrix signal YBM(k,l), and each of the at least one attenuation function is updated at a corresponding predetermined update interval T.

A non-transitory computer storage medium having stored therein one or more executable instructions that, when executed by a processor, perform an audio enhancement method comprising:

• generating a group of audio collection signals using a microphone array, wherein each audio collection signal in the group of audio collection signals is generated by one microphone in the microphone array, and each microphone in the microphone array is spaced apart from others;
• performing a delay-and-sum processing on the group of audio collection signals to generate a delay-and-sum signal YDSB(k,l), wherein k represents a frequency bin and l represents a frame index;
• performing a blocking-matrix processing on the group of audio collection signals to generate a blocking-matrix signal YBM(k,l);
• performing a filtering processing on the blocking-matrix signal YBM(k,l) using an adaptive filtering matrix WANC, and removing the filtered blocking-matrix signal from the delay-and-sum signal YDSB(k,l) to obtain an enhanced audio output signal YOUT(k,l);
• wherein the adaptive filtering matrix W ANC is a weight coefficient matrix which is based on at least one attenuation function μ(t) and varies with the audio output signal YOUT(k,l) and the blocking-matrix signal YBM(k,l), and each of the at least one attenuation function is updated at a corresponding predetermined update interval T.