Method and display device for recognizing voice

A display device for performing an operation according to a control command of a remote control device, the display device comprising:

• an inputter configured to receive, from the remote control device, an audio signal comprising at least one of a voice signal and a noise signal;
• an outputter configured to output guide information of the received audio signal;
• and
• a processor configured to extract a signal characteristic of the received audio signal, to identify a noise type related to the extracted signal characteristic with reference to signal characteristics for each of a plurality of pre-stored noise types, and to control the outputter to output guide information corresponding to the identified noise type,
• wherein the processor is further configured to identify a noise type that has a characteristic value that is similar to a characteristic value included in the signal characteristic of the audio signal, from among characteristic values included in signal characteristics for each of the plurality of noise types, as the noise type included in the audio signal,
• wherein the processor is further configured to, based on a similarity between feature values of at least two consecutive frames among a plurality of frames included in the audio signal and a feature value of a first noise type among the plurality of noise types being greater than or equal to a preset threshold value, identify the first noise type as the noise type included in the audio signal and acquire the guide information corresponding to the first noise type to be output, and
• wherein the inputter is further configured to select an audio signal input of a preset microphone among a plurality of microphones as the audio signal for determining the noise type.