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US 11,887,588 B2Granted
Display device
AssigneeLG Electronics Inc.
InventorWoojin Choi
Life of this patent
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Abstract
A display device including an external device interface configured to connect the display device to an external speaker; a microphone configured to receive a microphone signal; and a controller configured to: transmit an inaudible test signal to the external speaker to measure a signal delay between the external speaker and the display device, and extract a voice signal by removing an acoustic signal output from the external speaker from the microphone signal based on the measured signal delay.
Claims17
A display device comprising:
- an external device interface configured to connect the display device to an external speaker;
- a microphone configured to receive a microphone signal;
- and
- a controller configured to:
- transmit an inaudible test signal to the external speaker to measure a signal delay between the external speaker and the display device, and
- extract a voice signal by removing an acoustic signal output from the external speaker from the microphone signal based on the measured signal delay,
- wherein the controller is further configured to:
- in response to the external speaker not being initially connected to the display device, determine if a volume of the display device is set to zero,
- in response to the volume of the display device being set to zero, transmit the inaudible test signal to the external speaker, and
- in response to the volume of the display device not being set to zero, transmit the audible test signal to the external speaker.
7 more elements
Dependencies are inferred from the claim text.