Patents by Inventor Hi-Chul Jang

Hi-Chul Jang 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).

  • Digital television test stream generator, method thereof, and test stream recording medium using the same
    Patent number: 7180538
    Abstract: A DTV receiver test stream generator which prevents discontinuity phenomenon of a video and an audio, a method for generating the DTV receiver test stream, and a recording medium where the DTV test stream having no discontinuity phenomenon is recorded. To this end, a test stream for a function test or a performance valuation of the DTV receiver is generated and a reproduction time is equalized on the basis of the least common multiple of a video frame time, an audio frame time, and a TS packet time when the test stream is repeatedly reproduced. According to this, when used at a DTV production field where a test pattern is used or at a broadcasting system which repeatedly transmits the DTV stream of a limited length such as a stationary image, a reliability of the DTV receiver test can be ensured.
    Type: Grant
    Filed: April 11, 2003
    Date of Patent: February 20, 2007
    Assignee: LG Electronics Inc.
    Inventors: Jong-Sik Kim, Douk-Hwan Park, Hi-Chul Jang, Ki-Sun Song, Kyu-Ik Sohng, Chan-Ho Han
  • Digital television test stream generator, method thereof, and test stream recording medium using the same
    Publication number: 20030234889
    Abstract: A DTV receiver test stream generator which prevents discontinuity phenomenon of a video and an audio, a method for generating the DTV receiver test stream, and a recording medium where the DTV test stream having no discontinuity phenomenon is recorded. To this end, a test stream for a function test or a performance valuation of the DTV receiver is generated and a reproduction time is equalized on the basis of the least common multiple of a video frame time, an audio frame time, and a TS packet time when the test stream is repeatedly reproduced. According to this, when used at a DTV production field where a test pattern is used or at a broadcasting system which repeatedly transmits the DTV stream of a limited length such as a stationary image, a reliability of the DTV receiver test can be ensured.
    Type: Application
    Filed: April 11, 2003
    Publication date: December 25, 2003
    Inventors: Jong-Sik Kim, Douk-Hwan Park, Hi-Chul Jang, Ki-Sun Song, Kyu-Ik Sohng, Chan_Ho Han