Speech signal enhancement method and apparatus, and electronic device

An electronic device, comprising a processor, a memory, and a program or an instruction stored in the memory and runnable on the processor, wherein the program or the instruction is executed by the processor to implement:

• performing noise reduction processing on a first speech signal according to a first time-frequency spectrum and a first power spectrum to obtain a second speech signal, wherein the first time-frequency spectrum is used to indicate a time domain feature and a frequency domain feature of the first speech signal, and the first power spectrum is a power spectrum of a noise signal in the first speech signal;
• determining a voiced signal in the second speech signal, and performing gain compensation on the voiced signal, wherein the voiced signal is a signal with a cepstral coefficient greater than or equal to a preset threshold in the second speech signal;
• and
• determining a damage compensation gain of the second speech signal according to the voiced signal on which the gain compensation has been performed, and performing gain compensation on the second speech signal based on the damage compensation gain;
• wherein the determining a voiced signal in the second speech signal, and performing gain compensation on the voiced signal comprises:
• performing homomorphic positive analysis processing on the second speech signal to obtain a target cepstral coefficient of the second speech signal;
• determining a maximum cepstral coefficient in the target cepstral coefficient, and determining a signal corresponding to the maximum cepstral coefficient in the second speech signal as the voiced signal;
• and
• performing gain amplification processing on the maximum cepstral coefficient, to perform gain compensation on the voiced signal.

A non-transitory readable storage medium, storing a program or an instruction, wherein when the program or the instruction is executed by a processor, following steps are implemented:

• performing noise reduction processing on a first speech signal according to a first time-frequency spectrum and a first power spectrum to obtain a second speech signal, wherein the first time-frequency spectrum is used to indicate a time domain feature and a frequency domain feature of the first speech signal, and the first power spectrum is a power spectrum of a noise signal in the first speech signal;
• determining a voiced signal in the second speech signal, and performing gain compensation on the voiced signal, wherein the voiced signal is a signal with a cepstral coefficient greater than or equal to a preset threshold in the second speech signal;
• and
• determining a damage compensation gain of the second speech signal according to the voiced signal on which the gain compensation has been performed, and performing gain compensation on the second speech signal based on the damage compensation gain;
• wherein the determining a voiced signal in the second speech signal, and performing gain compensation on the voiced signal comprises:
• performing homomorphic positive analysis processing on the second speech signal to obtain a target cepstral coefficient of the second speech signal;
• determining a maximum cepstral coefficient in the target cepstral coefficient, and determining a signal corresponding to the maximum cepstral coefficient in the second speech signal as the voiced signal;
• and
• performing gain amplification processing on the maximum cepstral coefficient, to perform gain compensation on the voiced signal.