Patent ID: 8184817

Claim:
A multi-channel acoustic signal processing device which divides an input signal into audio signals of m channels, where m is larger than 1, the input signal being generated by down-mixing the audio signals, said device comprising: a decorrelated signal generation unit operable to generate a decorrelated signal by performing reverberation processing on the input signal, the decorrelated signal representing a sound represented by the input signal and reverberation; a matrix operation unit operable to generate the audio signals of the m channels by performing an arithmetic operation on the input signal and the decorrelated signal generated by said decorrelated signal generation unit, the arithmetic operation using a matrix which indicates distribution of a signal intensity level and a distribution of the reverberation wherein said matrix operation unit includes: a matrix generation unit operable to generate an integrated matrix which indicates multiplication of a level distribution matrix by a reverberation adjustment matrix, the level distribution matrix indicating the distribution of the signal intensity level and the reverberation adjustment matrix indicating the distribution of the reverberation; and an arithmetic unit operable to generate the audio signals of the m channels by multiplying (i) a matrix indicated by the decorrelated signal and the input signal by (ii) the integrated matrix generated by said matrix generation unit, and wherein said multi-channel acoustic signal processing device further comprises a phase adjustment unit operable to adjust a phase of the input signal according to the decorrelated signal and the integrated matrix.