Patents by Inventor Seoung Keun Ahn

Seoung Keun Ahn 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).

  • Method of inserting sync data in modulated data and recording medium containing the sync data
    Patent number: 7167524
    Abstract: The present invention relates to a method of inserting sync patterns of different lengths in modulated data, and a recording medium having sync patterns produced by the method. The sector sync and the frame sync pattern to be inserted in modulated data in accordance with the present invention must satisfy the given (d,k) constraints, have distinctive 0's run the modulated channel data can not have, and be as short as it can. In addition, the frame sync pattern is shorter than the sector sync pattern because the frame sync pattern is more frequently inserted than the sector one. Owing to the present sync patterns, the storage capacity reduction of a recording medium due to necessary insertion of sync patterns can be minimized under a given modulation condition.
    Type: Grant
    Filed: February 5, 2002
    Date of Patent: January 23, 2007
    Assignee: LG Electronics Inc.
    Inventors: Seoung Keun Ahn, Sang Woon Suh, Jin Yong Kim, Kees A. Schouhamer Immink
  • Method of inserting sync data in modulated data and recording medium containing the sync data
    Publication number: 20020136338
    Abstract: The present invention relates to a method of inserting sync patterns of different lengths in modulated data, and a recording medium having sync patterns produced by said method. The sector sync and the frame sync pattern to be inserted in modulated data in accordance with the present invention must satisfy the given (d, k) constraints, have distinctive 0's run the modulated channel data can not have, and be as short as it can. In addition, the frame sync pattern is shorter than the sector sync pattern because the frame sync pattern is more frequently inserted than the sector one. Owing to the present sync patterns, the storage capacity reduction of a recording medium due to necessary insertion of sync patterns can be minimized under a given modulation condition.
    Type: Application
    Filed: February 5, 2002
    Publication date: September 26, 2002
    Inventors: Seoung Keun Ahn, Sang Woon Suh, Jin Yong Kim, Kees A. Schouhamer Immink