Patents by Inventor Man C. Choi

Man C. Choi 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: 5532831
    Abstract: A recording apparatus for a high definition video cassette recorder, comprises a tape discriminator for checking for the presence of a hole on a specified position of a tape to discriminate whether the tape is of the normal-VHS type or the super-VHS type, a clock signal generator for generating a clock signal of a desired period in response to an output signal from the tape discriminator, a frequency divider for frequency-dividing the clock signal from the clock signal generator by an integer N, a first switch for selecting either the clock signal from the clock signal generator or the frequency divided clock signal in response to the output signal from the tape discriminator, a video data separator for separating intra-frame data and inter-frame data from an input digital video signal in response to the clock signal selected by the first switch and outputting the separated intra-frame data, a second switch for selecting either the input digital video signal or the intra-frame data from the video data separat
    Type: Grant
    Filed: March 10, 1994
    Date of Patent: July 2, 1996
    Assignee: Goldstar Company, Ltd.
    Inventors: Man C. Choi, Soo K. Kim, Je H. Lee, Tae S. Yang, Sang J. Woo
  • Patent number: 5506733
    Abstract: An apparatus for recording and reproducing digital/analog video signals including a single head drum attached with heads for processing analog video signals and heads for processing digital video signals, and switches performing switching operations on the basis of the kind of input video signals. The head drum is variable in speed, depending on the kind of input video signals. In accordance with the apparatus, both analog and digital signals can be recorded and reproduced by a single recording unit and a single reproducing unit both capable of varying in characteristic, based on a video signal received thereto. This provides a reduction in manufacture cost and a light, thin, simple and compact construction of the existing VCRs.
    Type: Grant
    Filed: January 4, 1994
    Date of Patent: April 9, 1996
    Assignee: Goldstar Co., Ltd.
    Inventors: Soo K. Kim, Mun C. Joung, Yong H. Shin, Man C. Choi, Yoon S. Seoh, Soon K. Lim, Joong K. Joh