Patents by Inventor Lee Vern Hedlund

Lee Vern Hedlund 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: 4093959
    Abstract: In a still frame playback mode, a video disc player reproduces a carrier signal which is frequency modulated in accordance with a composite video signal representative of successive repetitions of two interlaced image fields constituting a single image frame and comprising a luminance signal component, a chrominance signal component and synchronizing information, including a color burst. An FM demodulator develops a composite video signal, which is characterized by a 180.degree. phase discontinuity in the chrominance signal component between the frame end and the succeeding frame start. A first inverter circuit inverts the phase of the color burst every other image frame piror to the processing of the composite video signal output in time base correction and drop-out compensation circuits.
    Type: Grant
    Filed: March 14, 1977
    Date of Patent: June 6, 1978
    Assignee: RCA Corporation
    Inventor: Lee Vern Hedlund