ACOUSTIC PROCESSING DEVICE AND PROGRAM

To reproduce an acoustic signal of program sound produced by an acoustic system having any channel arrangement with a plurality of layers in a vertical direction, by an acoustic system having another channel arrangement, without significantly impairing the intention of a producer.SOLUTION: An acoustic processing device 1 includes: a conversion destination channel dividing section 11 to divide a playback position of a conversion destination multichannel acoustic signal into a plurality of layers in an elevation angle direction; a conversion source channel playback position determination section 12 to determine a playback position of a conversion source multichannel acoustic signal on each divided layer; a channel quantity conversion coefficient determination section 13 to determine channel quantity conversion coefficients on the basis of a playback position of the conversion destination multichannel acoustic signal and a playback position of the conversion source multichannel acoustic signal having been determined; and an output signal generating section 15 to generate the conversion destination multichannel acoustic signal from the conversion source multichannel acoustic signal by using a channel quantity conversion coefficient matrix including channel quantity conversion coefficients as each element.SELECTED DRAWING: Figure 1 【課題】上下方向に複数の層を持つ任意のチャンネル配置を持つ音響方式で制作された番組音声の音響信号を、制作者の意図を大きく損なうことなく、別のチャンネル配置を持つ音響方式で再生する。【解決手段】音響処理装置１は、変換先マルチチャンネル音響信号の再生位置を仰角方向の複数層に分割する変換先チャンネル分割部１１と、変換元マルチチャンネル音響信号の再生位置を、各分割層上に決定する変換元チャンネル再生位置決定部１２と、変換先マルチチャンネル音響信号の再生位置と決定された変換元マルチチャンネル音響信号の再生位置とに基づいてチャンネル数変換係数を決定するチャンネル数変換係数決定部１３と、チャンネル数変換係数を各要素とするチャンネル数変換係数行列を用いて、変換元マルチチャンネル音響信号から変換先マルチチャンネル音響信号を生成する出力信号生成部１５と、を備える。【選択図】図１