Patents by Inventor Sim Hak Keong

Sim Hak Keong 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).

  • Trellis modulation protocols for a VDSL system
    Patent number: 8644405
    Abstract: A new protocol is proposed for transmission of data through lines such as telephone lines. The tones of a signal are grouped, and Trellis encoding is performed only of the members of a group. The computational cost of coding and decoding the data is reduced (compared to treating all the tones of a given direction equivalently), and the invention makes it possible to significantly reduce the computational and memory requirements of the encoder and decoder. Furthermore, Trellis decoding errors are not propagated between the groups.
    Type: Grant
    Filed: July 16, 2012
    Date of Patent: February 4, 2014
    Assignee: Lantiq Deutschland GmbH
    Inventors: Raj Kumar Jain, Sim Hak Keong
  • Trellis modulation protocols for a VDSL system
    Publication number: 20130058430
    Abstract: A new protocol is proposed for transmission of data through lines such as telephone lines. The tones of a signal are grouped, and Trellis encoding is performed only of the members of a group. The computational cost of coding and decoding the data is reduced (compared to treating all the tones of a given direction equivalently), and the invention makes it possible to significantly reduce the computational and memory requirements of the encoder and decoder. Furthermore, Trellis decoding errors are not propagated between the groups.
    Type: Application
    Filed: July 16, 2012
    Publication date: March 7, 2013
    Applicant: LANTIQ DEUTSCHLAND GMBH
    Inventors: Raj Kumar Jain, Sim Hak Keong
  • Trellis modulation protocols for a VDSL system
    Patent number: 8238474
    Abstract: A new protocol is proposed for transmission of data through lines such as telephone lines. The tones of a signal are grouped, and Trellis encoding is performed only of the members of a group. The computational cost of coding and decoding the data is reduced (compared to treating all the tones of a given direction equivalently), and the invention makes it possible to significantly reduce the computational and memory requirements of the encoder and decoder. Furthermore, Trellis decoding errors are not propagated between the groups.
    Type: Grant
    Filed: March 4, 2005
    Date of Patent: August 7, 2012
    Assignee: Lantiq Deutschland GmbH
    Inventors: Raj Kumar Jain, Sim Hak Keong
  • Allocating data between tones
    Patent number: 7796699
    Abstract: A new protocol is proposed for transmission of data through lines such as telephone lines. The tones of a signal are associated into groups 10, 11, and tone ordering, gain selection, and/or bit swapping within the processing system are done within the members of a group 10, 11. This idea is applicable both to tone ordering etc., following the training stage, and also to the dynamic configuration changes subsequently, for example, bit swapping. The computational cost of coding and decoding the data is reduced (compared to treating all the tones of a given direction equivalently), and the invention makes it possible to significantly reduce the memory requirements of the encoder and decoder.
    Type: Grant
    Filed: November 26, 2008
    Date of Patent: September 14, 2010
    Assignees: Infineon Technologies AG, Infineon Technologies AG
    Inventors: Raj Kumar Jain, Sim Hak Keong