Nippon Telegraph and Telephone Corporation

Sumitaka Sakauchi

Yoichi Haneda

Kenta Niwa

Kenichi Furuya

A sound enhancement technique that uses transfer functions aof sounds that come from each of one or more positions/directions that are assumed to be sound sources arriving at each microphone to obtain a filter for a position that is a target of sound enhancement, where i denotes a direction and g denotes a distance for identifying each of the positions. Each of the transfer functions ais represented by sum of a transmission characteristic of a direct sound that directly arrives from the position determined by the direction i and the distance g and a transmission characteristic of one or more reflected sounds produced by reflection of the direct sound off an reflective object. A filter that corresponds to the position that is the target of sound enhancement is applied to frequency-domain signals transformed from M picked-up sounds picked up with M microphones to obtain a frequency-domain output signal.

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Tokyo, Japan

Sumitaka Sakauchi