Method for extracting voice signals of plurality of users, and terminal device and robot implementing same

A terminal device in a vehicle, comprising;

• a memory storing one or more instructions;
• and
• a processor executing the one or more instructions,
• wherein a plurality of users and a plurality of microphones corresponding to the plurality of users are located in an inner space of the vehicle,
• the processor extracts a plurality of voice signals output by each of the plurality of users using a plurality of sound signals received by each of the plurality of microphones, and
• the processor generates a noise-canceling signal using at least one of other sound signals received respectively by at least one of other microphone except an i-th microphone among the plurality of microphones, offsets an i-th sound signal received by an i-th microphone among the plurality of microphones, and the noise-canceling signal, and extracts an i-th voice signal output by an i-th user corresponding to the i-th microphone among the plurality of users.

A method for extracting voice signals of a plurality of users, which is performed in a device including a plurality of microphones and a processor, comprising:

• receiving, by the plurality of microphones, a plurality of sound signals respectively;
• and
• extracting, by a processor, a plurality of voice signals output by each of the plurality of users using the plurality of sound signals,
• the step of extracting a plurality of voice signals, comprising:
• reversing a phase of at least one of other sound signal received respectively by at least one of other microphone except an i-th microphone among the plurality of microphones;
• and
• extracting an i-th voice signal output by an i-th user corresponding to the i-th microphone among the plurality of users based on a i-th sound signal received by the i-th microphone and at least one of other sound signal, in which the phase is reversed.