Patents Assigned to Lincoln Center for the Performing Arts, Inc.
  • Method and apparatus for secure audio channel transmission in a CATV system
    Patent number: 4586081
    Abstract: A secure audio channel transmission system method and apparatus in which an FM signal is generated on an FM broadcast frequency, such as 107.5 megahertz, divided in frequency by 2 and distributed via a cable television system to subscribers equipped with frequency doubler circuits that reconstitute the FM signal for reception on a standard FM broadcast receiver. Unauthorized reception is prevented by the use of the non-standard, frequency-divided signal which is not receivable by standard broadcast channel television or FM receivers.
    Type: Grant
    Filed: April 28, 1980
    Date of Patent: April 29, 1986
    Assignee: Lincoln Center for the Performing Arts, Inc.
    Inventors: William J. St. Arnaud, Israel Switzer
  • Secure television system
    Patent number: 3936594
    Abstract: A secure system for television transmission wherein a television signal is transmitted on one frequency channel and a composite high fidelity stereophonic audio signal is transmitted on a separate unrelated frequency channel. Unauthorized reception of the audio portion of the signal is prevented by using non-standard multiplex transmission and by transmitting the audio signal in a frequency band which is preferably non-receivable by a standard television or FM receiver.
    Type: Grant
    Filed: August 5, 1974
    Date of Patent: February 3, 1976
    Assignee: Lincoln Center for the Performing Arts, Inc.
    Inventors: Mark Schubin, George Andersen