| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To suppress the generation of receiving errors in the transmission/reception of acoustic signals. <P>SOLUTION: The acoustic signal transmission system which is a system for transmitting information by acoustic waves is provided with a modulation device 4A, a plurality of speakers 6L, 6R, a microphone, and a demodulation device. The modulation device 4A encodes a transmission signal by a transmission diversity system and generates transmitting acoustic signals 5L, 5R allocated to a plurality of transmission paths. The plurality of speakers 6L, 6R respectively output the transmitting acoustic signals 5L, 5R as acoustic waves on the basis of the allocation. The microphone receives the acoustic waves outputted from the plurality of speakers 6L, 6R and outputs received acoustic signals. The demodulation device demodulates the received acoustic signals by the transmitting diversity system by using the transmission functions of respective acoustic waves from the plurality of speakers 6L, 6R up to the microphone. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
