Patents by Inventor Ketil Qvam Andersen

Ketil Qvam Andersen 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).

  • N-dimensional iterative ECC method and apparatus with combined erasure—error information and re-read
    Patent number: 7840872
    Abstract: In an iterative error correction method and apparatus for correcting errors in digital data read from a storage medium, re-reads are combined with the error correction procedure in a single error recovery procedure. The data read from the storage medium are represented as a multi-dimensional data structure, and the error recovery procedure is undertaken for each dimension of the data structure. In each dimension, an erasure map is generated that contains errors in the initial read of the data for that dimension, and the errors in the erasure map are deducted as they are corrected in subsequent re-reads. After a predetermined number of re-reads, or when no further errors exist, the error recovery procedure is ended.
    Type: Grant
    Filed: October 10, 2006
    Date of Patent: November 23, 2010
    Assignee: O-Mass AS
    Inventor: Ketil Qvam Andersen
  • N-dimensional iterative ECC method and apparatus with combined erasure - error information and re-read
    Publication number: 20080098280
    Abstract: In an iterative error correction method and apparatus for correcting errors in digital data read from a storage medium, re-reads are combined with the error correction procedure in a single error recovery procedure. The data read from the storage medium are represented as a multi-dimensional data structure, and the error recovery procedure is undertaken for each dimension of the data structure. In each dimension, an erasure map is generated that contains errors in the initial read of the data for that dimension, and the errors in the erasure map are deducted as they are corrected in subsequent re-reads. After a predetermined number of re-reads, or when no further errors exist, the error recovery procedure is ended.
    Type: Application
    Filed: October 10, 2006
    Publication date: April 24, 2008
    Inventor: Ketil Qvam Andersen