Patents by Inventor Song I. Choi

Song I. 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).

  • Parallel distributed sample descrambling circuit for cell-based asynchronous transfer mode physical layer
    Patent number: 5448640
    Abstract: A parallel distributed sample descrambler part for a cell-based ATM physical layer, comprising a PRBS generator for generating an 8-bit random number when being set to any value other than "0" in response to an initial value set signal upon initialization, to execute a generation polynomial for distributed sample descrambling given by x.sup.31 +x.sup.28 +1, and a descrambler for adding 8 bits of reception data to 8 bits of the random number from the PRBS generator, respectively, to perform the descrambling of the reception data and outputting the descrambled data bits. A sample processor extracts two bits for synchronization of the descrambler from the 8-bit random number from the PRBS generator as first and second samples in response to an external sampling clock and an external synchronous clock.
    Type: Grant
    Filed: March 16, 1994
    Date of Patent: September 5, 1995
    Assignees: Electronics and Telecommunications Research Institute, Korea Telecommunications Authority
    Inventors: Young S. Kim, Song I. Choi, Hong S. Park