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1. WO2007097157 - ACOUSTIC SIGNAL TRANSMISSION SYSTEM, MODULATION DEVICE, DEMODULATION DEVICE, AND ACOUSTIC SIGNAL TRANSMISSION METHOD

Publication Number WO/2007/097157
Publication Date 30.08.2007
International Application No. PCT/JP2007/051278
International Filing Date 26.01.2007
IPC
H04B 11/00 2006.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
BTRANSMISSION
11Transmission systems employing ultrasonic, sonic or infrasonic waves
H04B 7/06 2006.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
BTRANSMISSION
7Radio transmission systems, i.e. using radiation field
02Diversity systems; Multi-antenna systems, i.e. transmission or reception using multiple antennas
04using two or more spaced independent antennas
06at the transmitting station
H04J 1/00 2006.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
JMULTIPLEX COMMUNICATION
1Frequency-division multiplex systems
H04J 11/00 2006.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
JMULTIPLEX COMMUNICATION
11Orthogonal multiplex systems
H04J 99/00 2009.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
JMULTIPLEX COMMUNICATION
99Subject matter not provided for in other groups of this subclass
H04R 3/00 2006.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
3Circuits for transducers
CPC
H04B 11/00
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
BTRANSMISSION
11Transmission systems employing sonic, ultrasonic or infrasonic waves
H04B 7/0613
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
BTRANSMISSION
7Radio transmission systems, i.e. using radiation field
02Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
04using two or more spaced independent antennas
06at the transmitting station
0613using simultaneous transmission
H04J 3/0611
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
JMULTIPLEX COMMUNICATION
3Time-division multiplex systems
02Details
06Synchronising arrangements
0602Systems characterised by the synchronising information used
0605Special codes used as synchronising signal
0611PN codes
H04R 3/12
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
3Circuits for transducers ; , loudspeakers or microphones
12for distributing signals to two or more loudspeakers
Applicants
  • 株式会社エヌ・ティ・ティ・ドコモ NTT DoCoMo, Inc. [JP]/[JP] (AllExceptUS)
  • 松岡 保静 MATSUOKA, Hosei [JP]/[JP] (UsOnly)
Inventors
  • 松岡 保静 MATSUOKA, Hosei
Agents
  • 長谷川 芳樹 HASEGAWA, Yoshiki
Priority Data
2006-04559122.02.2006JP
Publication Language Japanese (JA)
Filing Language Japanese (JA)
Designated States
Title
(EN) ACOUSTIC SIGNAL TRANSMISSION SYSTEM, MODULATION DEVICE, DEMODULATION DEVICE, AND ACOUSTIC SIGNAL TRANSMISSION METHOD
(FR) SYSTEME DE TRANSMISSION DE SIGNAL ACOUSTIQUE, DISPOSITIF DE MODULATION ET DE DEMODULATION ET PROCEDE DE TRANSMISSION DE SIGNAL ACOUSTIQUE
(JA) 音響信号伝送システム、変調装置、復調装置、及び音響信号伝送方法
Abstract
(EN)
An acoustic signal transmission system transmits information by a sound wave. The system includes a modulation device, a plurality of speakers, a microphone, and a demodulation device. The modulation device encodes a transmission signal by the transmission diversity method and generates a transmission acoustic signal allocated to a plurality of transmission paths. The plurality of speakers output the transmission acoustic signal as a sound wave according to the allocation. The microphone receives the sound wave outputted from the speakers and outputs the received acoustic signal. The demodulation device decodes the received acoustic signal by the transmission diversity method by using a transfer function of each of the sound waves from the speakers to the microphone.
(FR)
La présente invention concerne un système de transmission de signaux acoustiques qui transmet des informations par le biais d'une onde sonore. Le système comprend un dispositif de modulation, une pluralité de haut-parleurs, un microphone et un dispositif de démodulation. Le dispositif de modulation encode un signal de transmission par le biais du procédé de diversité de transmission et génère un signal acoustique de transmission attribué à une pluralité de voies de transmission. La pluralité de haut-parleurs émettent le signal acoustique de transmission comme onde sonore selon l'attribution. Le microphone reçoit l'onde sonore émise par les haut-parleurs et émet le signal acoustique de réception. Le dispositif de démodulation décode le signal acoustique reçu par le procédé de diversité de transmission en utilisant la fonction de transfert de chacune des ondes sonores acheminées des haut-parleurs au microphone.
(JA)
 本発明の音響信号伝送システムは、音波で情報を伝送するシステムであって、変調装置と複数のスピーカと、マイクロフォンと、復調装置とを備える。変調装置は、伝送信号を送信ダイバーシチ方式で符号化すると共に複数の送信パスに割り当てた送信音響信号を生成する。複数のスピーカは、割り当てに基づいて送信音響信号を音波としてそれぞれ出力する。マイクロフォンは、複数のスピーカから出力された音波を受信して受信音響信号を出力する。復調装置は、複数のスピーカからマイクロフォンまでのそれぞれの音波の伝達関数を用いて、受信音響信号を送信ダイバーシチ方式で復号する。
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