Patents by Inventor David I. Wright

David I. Wright 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: 4250521
    Abstract: A video signal dropout compensator stores information from at least one incoming television line which is represented by a plurality of samples of combined liminance and chrominance signal components. The samples occur at a rate equal to four times the chrominance subcarrier frequency. When a signal dropout is detected in one or more of the samples, a replacement sample is generated using samples from at least one adjacent television line. The value of the sample on the adjacent line at the horizontal location, corresponding to the dropout sample, is subtracted from the sum of the samples before and after this corresponding location sample. The resultant value gives a dropout replacement sample with proper chrominance phase having a close approximation of the correct luminance value.
    Type: Grant
    Filed: July 19, 1979
    Date of Patent: February 10, 1981
    Assignee: RCA Corporation
    Inventor: David I. Wright
  • Patent number: 4142209
    Abstract: Apparatus for optically recording and reading information on a disc medium rotating surface. The information is recorded on concentric or spiral tracks continuously or in parts. The information, which can represent, for example, television video, x-ray, or digital data signals, are addressed by codes that identify the track on which the information is recored preceded by the address code. The recording mechanism can record a new track adjacent to the previous track if the disc has been moved between recordings. There are also means for compensating for eccentricity errors introduced by small changes in the radial dimensions of the disc. The spacing between tracks is typically 2.5 microns although the eccentricity errors may exceed the span of ten tracks. Typically, 4,000 tracks per cm can be recorded.
    Type: Grant
    Filed: March 14, 1977
    Date of Patent: February 27, 1979
    Assignee: RCA Corporation
    Inventors: Lee V. Hedlund, Ronald P. Fink, David I. Wright