Patent ID: 8903097

Claim:
An information processing device comprising: a hardware processor; and a memory storing instructions, wherein the hardware processor executes the instructions to: estimate an environmental sound by removing from a received ambient sound a ringing sound included in the ambient sound; determine a time feature quantity for the estimated environmental sound and the ringing sound using a time waveform analysis of the estimated environmental sound and the ringing sound; determine a frequency feature quantity for the estimated environmental sound and the ringing sound using a frequency waveform analysis of the estimated environmental sound and the ringing sound; compare the time feature quantities of the estimated environmental sound and the ringing sound to determine a time feature quantity difference; compare the frequency feature quantities of the estimated environmental sound and the ringing sound to determine a frequency feature quantity difference; and adjust a sound quality of the ringing sound to be output based on the time feature quantity difference and the frequency feature quantity difference, wherein adjusting the sound quality of the ringing sound includes: identifying a highest power frequency band of the estimated environmental sound; and emphasizing a frequency band of the ringing sound which is different from the highest power frequency band of the estimated environmental sound.