Patents by Inventor Clarence D. Perr

Clarence D. Perr has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 4600942
    Abstract: Parts of a composite video signal, such as segments of each horizontal scan line, are stored in analog storage devices and retrieved therefrom in a cyclic manner to rearrange them and thereby encode the signal. The cyclic retrieval of the information from the storage devices is carried out on a selective basis in accordance with the binary state of a pseudo-random signal that is generated independently at each of the encoding and decoding stations. Synchronization of the two independently generated signals is provided by a control word and an initialization word that are transmitted with the encoded video signal, one of which is encrypted. Decryption of the word is carried out with a master key at each of the encoding and decoding stations.
    Type: Grant
    Filed: November 27, 1984
    Date of Patent: July 15, 1986
    Assignee: Telease, Inc.
    Inventors: Robert W. Field, Clarence D. Perr, Ronald R. Gerlach
  • Patent number: 4410911
    Abstract: A method and system for scrambling a plurality of input signals for secure transmission thereof, as well as various methods and systems for television transmission, are disclosed. The disclosed scrambling technique, in one form, includes modulating an in-phase component of at least one carrier signal in response to one and then another of a plurality of input signals in a sequence of time intervals such that parts but not all of the one and another of the input signals are carried by the in-phase component. A quadrature component of the at least one carrier signal is modulated in response to the one and another of the plurality of input signals in the sequence of time intervals such that parts but not all of the one and another of the input signals are carried by the quadrature component and such that the in-phase and quadrature components together carry the one and another of the input signals in their entireties. The modulated in-phase and quadrature components are combined for transmission.
    Type: Grant
    Filed: July 14, 1982
    Date of Patent: October 18, 1983
    Assignee: Telease, Inc.
    Inventors: Robert W. Field, Ronald R. Gerlach, Clarence D. Perr, Robert S. Block
  • Patent number: 4398216
    Abstract: A method and system for scrambling a plurality of input signals for secure transmission thereof, as well as various methods and systems for television transmission, are disclosed. The disclosed scrambling technique, in one form, includes modulating an in-phase component of at least one carrier signal in response to one and then another of a plurality of input signals in a sequence of time intervals such that parts but not all of the one and another of the input signals are carried by the in-phase component. A quadrature component of the at least one carrier signal is modulated in response to the one and another of the plurality of input signals in the sequence of time intervals such that parts but not all of the one and another of the input signals are carried by the quadrature component and such that the in-phase and quadrature components together carry the one and another of the input signals in their entireties. The modulated in-phase and quadrature components are combined for transmission.
    Type: Grant
    Filed: September 19, 1980
    Date of Patent: August 9, 1983
    Assignee: Telease, Inc.
    Inventors: Robert W. Field, Ronald R. Gerlach, Clarence D. Perr, Robert S. Block