In place voice spreading method, in-field loudspeaker and its program

摘要

PROBLEM TO BE SOLVED: To provide a public-address method that can inform a speaker at a near-end side of how the speaker's voice sounds at a far-end side.;SOLUTION: A public-address method of the invention is comprised of an echo canceller process and a transmission signal arithmetic addition process. The transmission signal arithmetic addition process comprises a far-end side pseudo acoustic transmission vector receiving step, a reverberation addition step, and an arithmetic addition step. The far-end side pseudo acoustic transmission vector receiving step receives a far-end side pseudo acoustic transmission vector at a far-end side from a public-address system at the far-end side. The reverberation addition step generates a far-end side transmission signal which is a transmission signal with far-end side reverberation added thereto, by performing computation of convolution of the far-end side pseudo acoustic transmission vector and the transmission signal. The arithmetic addition step outputs a public-address audio signal by adding the far-end side transmission signal to the received signal.;COPYRIGHT: (C)2013,JPO&INPIT