Patents Assigned to Electronics and Telecommunications Resarch Institute
  • Patent number: 9905234
    Abstract: Methods and apparatuses for hiding and extracting data based on a pilot code sequence are provided. A data hiding method may include converting an input audio signal to a frequency domain, distorting phase information of the audio signal converted to the frequency domain based on a pilot code sequence representing data to be hidden, and converting the audio signal with the distorted phase information to a time domain and transmitting the audio signal converted to the time domain. The pilot code sequence may be a set of phase values corresponding to a bit value “0” or “1” of data.
    Type: Grant
    Filed: February 23, 2016
    Date of Patent: February 27, 2018
    Assignee: Electronics and Telecommunications Resarch Institute
    Inventors: Seung Kwon Baeck, Tae Jin Park, Jong Mo Sung, Yong Ju Lee, Tae Jin Lee, Jin Soo Choi
  • Patent number: 7659983
    Abstract: A method and apparatus for performing an assay process, featuring providing microbeads in a solution, each microbead having a particle substrate with a grating with a superposition of different predetermined regular periodic variations of the index of refraction disposed in the particle along a grating axis and indicative of a code; placing the microbeads on an alignment substrate; reading codes of the microbeads and the position thereof on the alignment substrate; reading the fluorescence on each microbead and the position order thereof on the alignment substrate; and determining an assay result based on bead position order and bead code of the earlier reading steps.
    Type: Grant
    Filed: November 30, 2006
    Date of Patent: February 9, 2010
    Assignee: Electronics and Telecommunications Resarch Institute
    Inventors: John A. Moon, Alan D. Kersey, Martin A. Putnam, Tuo Li