Audio signal processing method, terminal device and storage medium
An audio signal processing method including the following steps: acquiring a bone conduction audio signal collected by a bone conduction vibration pickup device; acquiring a low frequency transfer function which matches the bone conduction audio signal and a high frequency transfer function corresponding to the low frequency transfer function, wherein the low frequency transfer function and the high frequency transfer function are corresponding transfer functions between the bone conduction audio signal and an air conduction audio signal which correspond to the same voice; and performing frequency domain extension on the bone conduction audio signal on the basis of the low frequency transfer function and the high frequency transfer function, and taking the extended initial audio as output audio. The effect of improving the integrity pf a voice signal collected by a terminal device is achieved.
1. An audio signal processing method, wherein, the audio signal processing method comprises:
acquiring a bone conduction audio signal collected by a bone conduction vibration pickup device;
acquiring a low frequency transfer function which matches the bone conduction audio signal and a high frequency transfer function corresponding to the low frequency transfer function, wherein the low frequency transfer function and the high frequency transfer function are corresponding transfer functions between the bone conduction audio signal and an air conduction audio signal which correspond to the same voice; and
performing frequency domain extension on the bone conduction audio signal on the basis of the low frequency transfer function and the high frequency transfer function, and taking the extended initial audio as output audio.
2. The audio signal processing method according to claim 1 , wherein, the step of acquiring a low frequency transfer function which matches the bone conduction audio signal and a high frequency transfer function corresponding to the low frequency transfer function comprises:
acquiring a low frequency characteristic of the bone conduction audio signal; and
acquiring the low frequency transfer function which matches the low frequency characteristic and the high frequency transfer function corresponding to the low frequency transfer function.
3. The audio signal processing method according to claim 2 , wherein the audio signal processing method of is applied to a terminal device, and wherein acquiring the low frequency transfer function which matches the low frequency characteristic and the high frequency transfer function corresponding to the low frequency transfer function comprises:
transmitting the low frequency characteristic to a server, wherein the server is configured to acquire the low frequency transfer function which matches the low frequency characteristic, and the high frequency transfer function corresponding to the low frequency transfer function stored in a cloud database, according to the received low frequency characteristic, and transmit the low frequency transfer function and the high frequency transfer function to the terminal device; and
receiving the low frequency transfer function and the high frequency transfer function transmitted by the server.
4. The audio signal processing method according to claim 1 , wherein the audio signal processing method is applied to a terminal device and wherein acquiring the low frequency transfer function matches the bone conduction audio signal and the high frequency transfer function corresponding to the low frequency transfer function comprises:
transmitting the bone conduction audio signal to a server, wherein the server is configured to acquire the low frequency which matches the initial audio, and the high frequency transfer function corresponding to the low frequency transfer function stored in a cloud database, according to the received bone conduction audio signal, and transmit the acquired low frequency transfer function and high frequency transfer function to the terminal device; and
receiving the low frequency transfer function and the high frequency transfer function transmitted by the server.
5. The audio signal processing method according to claim 1 , wherein the low frequency transfer function one-to-one corresponds to the high frequency transfer function, and the low frequency transfer function and the high frequency transfer function are stored in a database in an associated manner.
6. The audio signal processing method according to claim 1 , wherein, after the acquiring a bone conduction audio signal collected by a bone conduction vibration pickup device, the audio signal processing method further comprises:
acquiring an air conduction audio signal collected by the microphone;
determining the low frequency transfer function and the high frequency transfer function according to the bone conduction audio signal and the air conduction audio signal; and
storing the low frequency characteristic of the initial audio, the low frequency transfer function and the high frequency transfer function in an associated manner.
7. The audio signal processing method according to claim 6 , wherein determining the low frequency transfer function and the high frequency transfer function according to the bone conduction audio signal and the air conduction audio signal comprises:
acquiring a first low frequency characteristic of the bone conduction audio signal and a second low frequency characteristic of the air conduction audio signal;
acquiring a first high frequency characteristic of the bone conduction audio signal and a second high frequency characteristic of the air conduction audio signal; and
determining the low frequency transfer function according to the first low frequency characteristic and the second low frequency characteristic, and determining the high frequency transfer function according to the first high frequency characteristic and the second high frequency characteristic.
8. The audio signal processing method according to claim 1 , wherein the low frequency transfer function and the high frequency transfer function are acquired on the basis of a training voice signal, wherein the training voice signal comprises the bone conduction audio signal and the air conduction audio signal corresponding to the same voice.
9. A terminal device, wherein the terminal device comprises a memory, a processor and an audio signal processing program stored on the memory and operable on the processor, wherein the audio signal processing program, when executed by the processor, implements steps of the audio signal processing method according to claim 1 .
10. A computer readable storage medium, wherein an audio signal processing program is stored on the computer readable storage medium, wherein the audio signal processing program, when executed by the processor, implements the steps of the audio signal processing method according to claim 1 .