(54) ACOUSTIC SIGNAL TRANSMISSION METHOD AND APPARATUS WITH INSERTION SIGNAL
(75) Inventors: Satoshi Iwaki, Iruma (JP); Akira
Nakayama, Hachioji (JP); Tamotsu
Machino, Tokorozawa (JP); Ikuo
Kitagishi, Hachioji (JP); Yukihiro
Nakamura, Higashiyamato (JP)
(73) Assignee: Nippon Telegraph, Tokyo (JP)
( * ) Notice: Subject to any disclaimer, the term of this patent is extended or adjusted under 35 U.S.C. 154(b) by 956 days.
This patent is subject to a terminal disclaimer.
(21) Appl.No.: 11/200,288
(22) Filed: Aug. 8, 2005
(65) Prior Publication Data
US 2006/0153390 Al Jul. 13, 2006
Related U.S. Application Data
(63) Continuation of application No. 09/712,945, filed on Nov. 16, 2000, now Pat. No. 6,947,893.
(30) Foreign Application Priority Data
Nov. 19, 1999 (JP) 11-329914
Dec. 16, 1999 (JP) 11-356827
Dec. 22, 1999 (JP) 11-363811
Dec. 24, 1999 (JP) 11-366345
Dec. 24, 1999 (JP) 11-366346
May 10,2000 (JP) P2000-136716
May 10,2000 (JP) P2000-136717
Aug. 18, 2000 (JP) P2000-248800
Kitawaki, "Speech Communication Technology—Speech and Acoustics Technologies for Multimedia Services", Corona Publishing Co., Ltd., 1996 (with abstract).
(Continued) Primary Examiner—Martin Lerner (74) Attorney, Agent, or Firm—Nixon Peabody LLP
The acoustic signal transmission method is based on generating a synthesized sound electrical signal by electrically synthesizing an audible sound signal and another signal different than the audible sound signal at the sending side, and transmitting the synthesized sound electrical signal, and extracting the another signal different than the audible sound signal from the synthesized sound electrical signal at the receiving side. Here, generation of the synthesized sound electrical signal is made by using a data hiding technique, for example. Accordingly, the acoustic signal represented by the synthesized sound electrical signal can be heard by human ears in the same way as the audible sound signal, and the synthesized another signal cannot be detected by human ears. Here, the synthesized sound electrical signal can be transmitted as a sound wave in air space, as electrical signal through a transmission line or as radio signals such as infrared and electromagnetic waves.
23 Claims, 54 Drawing Sheets