Digital Patents (Class 348/660)
  • Patent number: 5499058
    Abstract: This invention provides a digital color encoder for digitizing color video signals. The encoder forms a digitized color video signal using logic function processing of the digitized luminance signal and color difference signals. The encoder provides an output signal equivalent to the luminance signal added to the color difference signals modulated by triangular wave functions and sampled at the sampling frequency. The sampling frequency is eight times the crominance subcarrier frequency. An analog video signal can easily be recovered from the digital video signal because the fundamental frequency of the triangular wave is easily separated from the higher order harmonics.
    Type: Grant
    Filed: February 27, 1995
    Date of Patent: March 12, 1996
    Assignee: Industrial Technology Research Institute
    Inventors: Chun-Hsien Horng, Guang-Nan Tzeng