DEVICE AND METHOD OF CALCULATING DRIVE COEFFICIENT OF SPEAKER IN SPEAKER FACILITY BASED ON AUDIO SIGNAL RELATED TO VIRTUAL SOUND SOURCE, AND DEVICE AND METHOD OF SUPPLYING DRIVE SIGNAL OF SPEAKER IN SPEAKER FACILITY

摘要

PROBLEM TO BE SOLVED: To reduce artifact and/or to improve the audio quality of an audio signal reproduced by a speaker facility, by calculating the drive coefficient of a speaker in the speaker facility.SOLUTION: A device for calculating the drive coefficient of a speaker in a speaker facility with regard to an audio signal 806 related to a virtual sound source is provided. When the position 802 of the virtual sound source is located in the inner region of speaker transition zone, first sub-drive coefficient of a speaker in a speaker facility is calculated according to a first calculation rule, a second sub-drive coefficient of the same speaker is calculated according to a second calculation rule, and the drive coefficient of the same speaker is calculated based on the first sub-drive coefficient and second sub-drive coefficient by a multichannel renderer 820.