| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a voice conference system which can obtain a sufficient echo cancel effect in such a case that a resource amount is limited. <P>SOLUTION: A PC 2 transmits a synchronous output control signal to a voice emitting/collecting device 1 when an echo cancel section of the device itself is selected. When the synchronous output control signal is received, the voice emitting/collecting device 1 stops functioning an echo cancel section 122, synchronizes a voice collecting beam signal MB from a voice collection control section 14 and voice signals FE1-FE3 for voice emission to generate a voice emission/collection synchronized signal SS and transmits it to the PC 2. The PC 2 separates the voice collecting beam signal MB and the voice signals FE1-FE3 for voice emission from the voice emission/collection synchronized signal SS while maintaining the synchronized state and gives the separated signals to a soft echo cancel section 212. The soft echo cancel section 212 of the PC 2 performs echo cancellation according to the voice collecting beam signal MB and the audio signals FE1-FE3 for voice emission to generate a PC-side echo-canceled sound collecting beam signal MBe2. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
