Patents by Inventor Guenther Pexa

Guenther Pexa 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).

  • Method for transmitting differential pulse code modulation (DPCM) values
    Patent number: 4734768
    Abstract: A method for transmitting DPCM values provides that a plurality of successive DPCM values are converted into data words of identical, optimally-minimal length and are combined with a preamble identifying the word length, the combination being undertaken to form a data block of constant length for transmission.
    Type: Grant
    Filed: April 29, 1987
    Date of Patent: March 29, 1988
    Assignee: Siemens Aktiengesellschaft
    Inventor: Guenther Pexa
  • Method and apparatus for monitoring modulation devices for video signals
    Patent number: 3997842
    Abstract: A method for monitoring modulation devices for video signals includes the transmission of a selected carrier portion for carrier recovery. The carrier portion is produced at the input of a modulation device by removing the direct voltage contained in the video signal. A predetermined direct voltage is then injected and the direct voltage obtained at the output of a demodulation device is fed to a monitoring device to determine breakdown of a transmission assembly, or the direct voltage signal, or an out of phase condition between the modulation and demodulation devices.
    Type: Grant
    Filed: May 19, 1975
    Date of Patent: December 14, 1976
    Assignee: Siemens Aktiengesellschaft
    Inventor: Guenther Pexa