Devices for the open-loop and closed-loop controlling of signals and information which are created, transmitted and/or reproduced by electrical means, electronic means and/or laser

摘要

Devices for the open-loop and closed-loop controlling of signals and information which are created, transmitted, stored and/or reproduced by electrical means, electronic means and/or laser. The said devices have tracks for the acoustic data which are separate from the optical component. Technical features for the open-loop and closed-loop control are specified.