H - Electricity – 04 – R
Patent
H - Electricity
04
R
H04R 23/00 (2006.01) H04B 10/12 (2006.01) H04R 1/44 (2006.01)
Patent
CA 2604950
The present invention relates to the communication or reproduction of sound, in particular audible sound. There is provided a method of communicating a sound, including the steps of: transmitting, onto an optical link, pairs of signal copies, the signal copies of a given pair having a time offset relative to one another; applying the audible sound to the optical link, such that the audible sound causes a phase modulation to the transmitted signal copies; receiving modulated signal copies previously transmitted onto the link; and, for received pairs of signal copies, causing one signal copy of a pair to mix with the other signal copy of that pair so as to produce a signal representative of the sound. The sound is an audible sound. It has been found that a delay of at least 75 micro seconds allows for a better reproduction of audio sounds, since these have a relatively low frequency content.
La présente invention concerne la communication ou la reproduction d~un son, en particulier d~un son audible. La présente invention concerne également un procédé de communication d~un son, comprenant les étapes de : transmission, sur une liaison optique, de paires de copies de signaux, les copies de signaux d~une paire donnée ayant un décalage temporel l~une par rapport à l~autre ; application du son audible sur la liaison optique, de telle sorte que le son audible provoque une modulation de phase sur les copies de signaux transmises ; réception des copies de signaux modulées transmises précédemment sur la liaison ; et, pour les paires de copies de signaux reçues, déclenchement du mélange d~une copie de signal d~une paire avec l~autre copie de signal de cette paire afin de produire un signal représentatif du son. Le son est un son audible. Il a été trouvé qu~un retard d~au moins 75 microsecondes permet une meilleur reproduction de sons audio, étant donné que ceux-ci ont un contenu de fréquence relativement faible.
Healey Peter
Sikora Edmund Sergio Robert
British Telecommunications Public Limited Company
Perry + Currier
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