Speech encoding and decoding methods and apparatuses, computer device, and storage medium

A computer device, comprising a memory and a processor, the memory storing computer-readable instructions that, when executed by the processor, cause the computer device to implement a speech encoding method including:

• performing subband decomposition on a target speech signal to obtain a plurality of subband excitation signals;
• obtaining an auditory perception representational value that corresponds to each subband excitation signal;
• determining at least one first subband excitation signal and at least one second subband excitation signal from the plurality of subband excitation signals, the auditory perception representational value of the at least one first subband excitation signal being less than or equal to a preset auditory perception threshold, and the auditory perception representational value of the at least one second subband excitation signal being greater than the auditory perception threshold;
• obtaining a gain of each of the at least one first subband excitation signal relative to a preset reference excitation signal as an encoding parameter that corresponds to the first subband excitation signal;
• obtaining a corresponding encoding parameter that is obtained by quantizing each of the at least one second subband excitation signal;
• and
• performing encoding on each subband excitation signal based on the encoding parameter corresponding to the subband excitation signal.

A non-transitory computer-readable storage medium, having computer-readable instructions stored therein, the computer-readable instructions, when being executed by a processor of a computer device, causing the computer device to implement a speech encoding method including:

• performing subband decomposition on a target speech signal to obtain a plurality of subband excitation signals;
• obtaining an auditory perception representational value that corresponds to each subband excitation signal;
• determining at least one first subband excitation signal and at least one second subband excitation signal from the plurality of subband excitation signals, the auditory perception representational value of the at least one first subband excitation signal being less than or equal to a preset auditory perception threshold, and the auditory perception representational value of the at least second subband excitation signal being greater than the auditory perception threshold;
• obtaining a gain of each of the at least one first subband excitation signal relative to a preset reference excitation signal as an encoding parameter that corresponds to the first subband excitation signal;
• obtaining a corresponding encoding parameter that is obtained by quantizing each of the at least one second subband excitation signal;
• and
• performing encoding on each subband excitation signal based on the encoding parameter corresponding to the subband excitation signal.