| 摘要 |
<P>PROBLEM TO BE SOLVED: To easily estimate a speaker arranged position in a multi-channel audio system and to perform optimum sound field reproduction. <P>SOLUTION: Pulses for measurement from a measurement signal generator 5 are generated from the selected one of speakers 10-1-10-5 by switching means 6-1-6-5 and received by microphones 11-1 and 11-2 provided in the other speakers and rear speakers RR and RL and delay time between the respective speakers is measured in a delay time measuring part 13. In a processing part 14, the three-dimensional coordinates of the respective speakers are estimated on the basis of the delay time, and in order to reproduce an optimum sound field at a listening position obtained from them or the listening position inputted from a listening position input part 16, the delay time, level and mixing ratio of the reproducing signals of respective channels are decided and set to delay circuits 2-1-2-5 and a level control and mixing circuit 4. <P>COPYRIGHT: (C)2003,JPO |
