Voice enhancement methods and systems

A voice enhancement device, comprising:

• collection devices located at different voice collection positions;
• at least one terminal;
• at least one storage medium;
• and
• at least one processor,
• wherein the at least one storage medium is configured to store a computer instruction;
• and the at least one processor is configured to execute the computer instruction to implement operations including:
• obtaining a first signal and a second signal of a target voice, the first signal and the second signal being voice signals of the target voice by the collection devices located at the different voice collection positions;
• determining a target signal-to-noise ratio (SNR) of the target voice based on the first signal or the second signal;
• determining a processing mode for the first signal and the second signal based on the target SNR;
• and
• obtaining a voice-enhanced output voice signal corresponding to the target voice by processing the first signal and the second signal based on the determined processing mode;
• the at least one terminal is configured to receive the voice-enhanced output voice signal corresponding to the target voice;
• wherein the determining a processing mode for the first signal and the second signal based on the target SNR comprises:
• in response to determining that the target SNR is smaller than a first threshold, processing the first signal and the second signal in a first mode;
• and
• in response to determining that the target SNR is greater than a second threshold, processing the first signal and the second signal in a second mode,
• wherein
• the first threshold is not larger than the second threshold, and
• computing resources allocated to the first mode is more than computing resources allocated to the second mode;
• wherein the processing the first signal and the second signal in a first mode comprises:
• obtaining a first output voice signal with a low frequency part of the target voice enhanced by processing a low frequency part of the first signal and a low frequency part of the second signal using a first processing technique, wherein the first processing technique includes:
• obtaining a first downsampling signal by performing a downsampling on the first signal, and
• obtaining a second downsampling signal by performing a downsampling on the second signal;
• obtaining a frequency domain signal of the first downsampling signal by translating the first downsampling signal from a time domain to a frequency domain, and obtaining a frequency domain signal of the second downsampling signal by translating the second downsampling signal from the time domain to the frequency domain;
• obtaining an enhanced frequency domain signal corresponding to the target voice by processing the frequency domain signal of the first downsampling signal and the frequency domain signal of the second downsampling signal;
• determining an enhanced voice signal based on the enhanced frequency domain signal;
• obtaining the first output voice signal with the low frequency part of the target voice enhanced by upsampling a part of the enhanced voice signal;
• obtaining a second output voice signal with a high frequency part of the target voice enhanced by processing a high frequency part of the first signal and a high frequency part of the second signal using a second processing technique;
• and
• obtaining the voice-enhanced output voice signal by combining the first output voice signal and the second output voice signal.