Including Adaptive Artifacts Removal (e.g., Switchable Trap Or Lpf In Luma Channel) Patents (Class 348/666)
  • Motion-and nonstandard-adaptive three-dimensional YC separating circuit for NTSC signal
    Patent number: 5339113
    Abstract: In a three-dimensional YC separating circuit including an intra-field YC separating circuit and an inter-frame YC separating circuit, when an NTSC composite video signal is nonstandard and is used for a static image part of an image, a low pass filtering is performed upon a C signal of the inter-frame YC separating circuit, and the low pass filtered C signal is added to a C signal of the intra-field YC separating circuit. Then, a Y signal is obtained by subtracting the combination of the two C signals from the NTSC composite video signal.
    Type: Grant
    Filed: September 24, 1993
    Date of Patent: August 16, 1994
    Assignee: NEC Corporation
    Inventor: Kiyoshi Iwasaki
  • Apparatus for reducing noise in a video signal by processing a luminance and chrominance component
    Patent number: 5333054
    Abstract: A video signal processing apparatus capable of improving a signal to noise ratio of a video signal by providing for a first luminance/chrominance separation circuit for still pictures and a second luminance/chrominance separation circuit for moving pictures. Color disturbances on the screen can be avoided by switching between a parallel configuration and a serial configuration of the first and second separation circuits without generating differences in signal delay times.
    Type: Grant
    Filed: December 9, 1992
    Date of Patent: July 26, 1994
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Seiichi Tanaka, Masahiko Mawatari