Patents by Inventor Doohee Han

Doohee Han 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).

  • Visible light communication system and transmission control method therein
    Patent number: 10439717
    Abstract: Disclosed are a visible light communication system and a method for controlling transmission in the same. In the system, a transmission control server receives video data and encodes the received video data into a layer signal of a scalable video coding (SVC) bitstream and controls a signal for each layer to be allocated and transmitted to a plurality of illuminations of a channel corresponding to a priority for each channel decided according to a channel state depending on an interference amount fed back from a reception apparatus according to an importance of the signal for each layer of the SVC bitstream. A reception apparatus receives video signals of SVC bitstreams transmitted from the plurality of illuminations and SVC-decoding the received video signals to generate video data and calculates the interference amount for each channel based on reception power measured for each channel of the received video signal and feeds back the calculated interference amount to the transmission control server.
    Type: Grant
    Filed: November 25, 2016
    Date of Patent: October 8, 2019
    Assignee: UNIVERSITY-INDUSTRY COOPERATION GROUP OF KYUNG HEE UNIVERSITY
    Inventors: Kye San Lee, Doohee Han, Kyun-Tak Kim, Hyun Song Shin
  • VISIBLE LIGHT COMMUNICATION SYSTEM AND TRANSMISSION CONTROL METHOD THEREIN
    Publication number: 20180269969
    Abstract: Disclosed are a visible light communication system and a method for controlling transmission in the same. In the system, a transmission control server receives video data and encodes the received video data into a layer signal of a scalable video coding (SVC) bitstream and controls a signal for each layer to be allocated and transmitted to a plurality of illuminations of a channel corresponding to a priority for each channel decided according to a channel state depending on an interference amount fed back from a reception apparatus according to an importance of the signal for each layer of the SVC bitstream. A reception apparatus receives video signals of SVC bitstreams transmitted from the plurality of illuminations and SVC-decoding the received video signals to generate video data and calculates the interference amount for each channel based on reception power measured for each channel of the received video signal and feeds back the calculated interference amount to the transmission control server.
    Type: Application
    Filed: November 25, 2016
    Publication date: September 20, 2018
    Inventors: Kye San Lee, Doohee Han, Kyun-Tak Kim, Hyun Song Shin