Patents by Inventor Lakshmi Anantha Challa

Lakshmi Anantha Challa 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 and apparatus for data error recovery using defect threshold detector and viterbi gain
    Patent number: 6657803
    Abstract: A method and apparatus are provided for reading from a storage medium to form data values. A signal is generated from a sector on the storage medium and a section of that signal is identified as having a change in amplitude. A gain multiplier is activated to multiply that section of the signal by a gain value. The gain multiplier is deactivated at the end of the section so that the remaining portion of the sector signal is not multiplied by the gain value. This results in a defect adjusted signal that is applied to a detector to detect data values.
    Type: Grant
    Filed: November 21, 2000
    Date of Patent: December 2, 2003
    Assignee: Seagate Technology LLC
    Inventors: Khong Mau Ling, Myint Ngwe, Kah Liang Gan, Lakshmi Anantha Challa, Quek Leong Choo