Method for recording sound of video-recorded object and mobile terminal

1. A method for recording sound of a video-recorded object, the method comprising:

obtaining, by a mobile terminal in an image recording process by means of facial recognition, position information of the video-recorded object relative to the mobile terminal;

converting, by the mobile terminal, the position information into beam configuration information, wherein the beam configuration information is an input parameter of a beamforming technology; and

performing, by the mobile terminal according to the beam configuration information, beamforming processing on recorded sound signals to enhance signal intensity of a sound signal at a position of the video-recorded object, and attenuate signal intensity of a sound signal at another position, to obtain sound at the position of the video-recorded object.

2. The method according to claim 1 , wherein the position information comprises angle information and distance information of the video-recorded object relative to the mobile terminal.

3. The method according to claim 1 , wherein:

the beam configuration information comprises a sound source position angle, a beam direction, and a beam width; and

converting, by the mobile terminal, the position information into beam configuration information comprises:

converting, by the mobile terminal, the angle information of the video-recorded object relative to the terminal into the sound source position angle and the beam direction, and

converting, by the mobile terminal, the distance information of the video-recorded object relative to the terminal into the beam width, wherein a longer distance indicates a narrower beam width.

4. The method according to claim 3 , wherein:

the mobile terminal comprises at least two microphones; and

performing, by the mobile terminal according to the beam configuration information, beamforming processing on the recorded sound signals comprises:

adjusting, by the mobile terminal according to the beam configuration information, a parameter of a sound signal acquired by each microphone, so that after sound signals acquired by all the microphones in the mobile terminal are synthesized, only a sound signal at the position of the video-recorded object exits.

5. A mobile terminal, configured to record sound of a video-recorded object, the mobile terminal comprising:

a processor; and

memory coupled to the processor, the memory comprising instructions that, when executed by the processor, cause the mobile terminal to:

obtain, in an image recording process by means of facial recognition, position information of the video-recorded object relative to the mobile terminal,

convert the position information into beam configuration information, wherein the beam configuration information is an input parameter of a beamforming technology; and

perform, according to the beam configuration information, beamforming processing on recorded sound signals to enhance signal intensity of a sound signal at a position of the video-recorded object, and attenuate signal intensity of a sound signal at another position, to obtain sound at the position of the video-recorded object.

6. The mobile terminal according to claim 5 , wherein the position information comprises angle information and distance information of the video-recorded object relative to the mobile terminal.

7. The mobile terminal according to claim 5 , wherein:

the beam configuration information comprises a sound source position angle, a beam direction, and a beam width; and

the instructions, when executed by the processor, cause the mobile terminal to:

convert the angle information of the video-recorded object relative to the mobile terminal into the sound source position angle and the beam direction, and

convert the distance information of the video-recorded object relative to the mobile terminal into the beam width, wherein a longer distance indicates a narrower beam width.

8. The mobile terminal according to claim 5 , further comprising:

at least two microphones; and

wherein the instructions, when executed by the processor, cause the mobile terminal to adjust, according to the beam configuration information, a parameter of a sound signal acquired by each microphone, so that after sound signals acquired by all the microphones in the mobile terminal are synthesized, only a sound signal at the position of the video-recorded object exits, and the sound at the position of the video-recorded object is obtained.

9. A mobile terminal, configured to record sound of a video-recorded object, the mobile terminal comprising:

a camera configured to:

obtain, in an image recording process by means of facial recognition, position information of the video-recorded object relative to the mobile terminal, and

transmit the obtained position information;

a microphone configured to record sound signals around the mobile terminal; and

a processor configured to:

receive the position information;

convert the position information into beam configuration information by invoking an operation instruction stored in the memory, where the beam configuration information is an input parameter of a beamforming technology; and

perform, according to the beam configuration information obtained through conversion, beamforming processing on the recorded sound signals to enhance signal intensity of a sound signal at a position of the video-recorded object, and attenuate signal intensity of a sound signal at another position, to obtain sound at the position of the video-recorded object.

10. The mobile terminal according to claim 9 , wherein the position information comprises angle information and distance information of the video-recorded object relative to the mobile terminal.

11. The mobile terminal according to claim 9 , wherein:

the beam configuration information comprises a sound source position angle, a beam direction, and a beam width; and

the processor is configured to:

convert the angle information of the video-recorded object relative to the mobile terminal in the position information into the sound source position angle and the beam direction, and

convert the distance information of the video-recorded object relative to the mobile terminal in the position information into the beam width, wherein a longer distance indicates a narrower beam width.

12. The mobile terminal according claim 9 , further comprising:

at least a second microphone; and

the processor is configured to adjust, according to the beam configuration information obtained through conversion, a parameter of a sound signal acquired by each microphone, so that after sound signals acquired by all the microphones in the mobile terminal are synthesized, only a sound signal at the position of the video-recorded object exits.