ACOUSTIC SIGNAL PROCESSING DEVICE AND ACOUSTIC SIGNAL PROCESSING METHOD
摘要
There is provided an acoustic signal processing device capable of reducing the calculation amount of the matrix calculation. The acoustic signal processing device (24) converts an acoustic signal down-mixed into NI channels into an acoustic signal of NO (NO > NI) channels. The acoustic signal processing device (24) includes: a first matrix calculation unit (241) for calculating a matrix of K (NO > K = NI) rows and NI columns for the acoustic signal down-mixed into the NI channels and outputting K signals subjected to the matrix calculation; K pieces of decorrelation units (242, 243) for generating a signal incoherent to the signal subjected to the matrix calculation for the time characteristic while maintaining the frequency characteristic of the signal subjected to the matrix calculation; and a second matrix calculation unit (244) for performing matrix calculation of NO rows and (NI+K) columns for the acoustic signal down-mixed into the NI channels and the K incoherent signals and outputting acoustic signals of NO channels.
申请公布号
WO2007043388(A1)
申请公布日期
2007.04.19
申请号
WO2006JP319757
申请日期
2006.10.03
申请人
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.;MIYASAKA, SHUJI;TAKAGI, YOSHIAKI;NORIMATSU, TAKESHI;KAWAMURA, AKIHISA;ONO, KOJIRO;CHONG, KOK SENG
发明人
MIYASAKA, SHUJI;TAKAGI, YOSHIAKI;NORIMATSU, TAKESHI;KAWAMURA, AKIHISA;ONO, KOJIRO;CHONG, KOK SENG