Patents by Inventor Jae Chul Ahn

Jae Chul Ahn 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).

  • Patent number: 11949881
    Abstract: The present invention discloses an encoding apparatus using a Discrete Cosine Transform (DCT) scanning, which includes a mode selection means for selecting an optimal mode for intra prediction; an intra prediction means for performing intra prediction onto video inputted based on the mode selected in the mode selection means; a DCT and quantization means for performing DCT and quantization onto residual coefficients of a block outputted from the intra prediction means; and an entropy encoding means for performing entropy encoding onto DCT coefficients acquired from the DCT and quantization by using a scanning mode decided based on pixel similarity of the residual coefficients.
    Type: Grant
    Filed: April 1, 2021
    Date of Patent: April 2, 2024
    Assignees: Electronics and Telecommunications Research Institute, Kwangwoon University Research Institute for Industry Cooperation, Industry-Academia Cooperation Group of Sejong University
    Inventors: Se-Yoon Jeong, Hae-Chul Choi, Jeong-Il Seo, Seung-Kwon Beack, In-Seon Jang, Jae-Gon Kim, Kyung-Ae Moon, Dae-Young Jang, Jin-Woo Hong, Jin-Woong Kim, Yung-Lyul Lee, Dong-Gyu Sim, Seoung-Jun Oh, Chang-Beom Ahn, Dae-Yeon Kim, Dong-Kyun Kim
  • Publication number: 20230217047
    Abstract: A method, a system, and a computer-readable recording medium implement a fast-switching mode between channels in a multi-live transmission environment. A composite image in which images of multiple channels are synthesized into one image in a live transmission environment is received as one stream to configure a multi-view composed of the images of the multi-channels and, as an image of a specific channel is selected in the multi-view, the original image of the specific channel is received and the multi-view may be switched to a full-view of the image of the specific channel.
    Type: Application
    Filed: March 9, 2023
    Publication date: July 6, 2023
    Inventors: Joon-kee CHANG, Sung Ho KIM, Hyesung NO, Yun Ho JUNG, Jinhoon KIM, Yeong Jin JEONG, Jeongki KIM, In Cheol KANG, Jonghyeok LEE, Jae Chul AHN, Sung Taek CHO
  • Patent number: 10519312
    Abstract: The present invention relates to an ultra-thin black polyimide film and a method for preparing the same. The ultra-thin black polyimide film according to the present invention has a thickness of 8 ?m or less, and has not only an excellent gloss and a low light transmittance in the range of visible light, but also an excellent dimensional stability so as to be effectively used in products such as slim devices, coverlays, insulating films, or semiconductor devices, which need to have a good mechanical or thermal properties.
    Type: Grant
    Filed: September 29, 2017
    Date of Patent: December 31, 2019
    Assignee: SKC KOLON PI Inc.
    Inventors: Kil Nam Lee, Jae Chul Ahn, In Seok Oh, Sang Hak Lee, Jae Baek Lee, Hyun Jai Lim
  • Publication number: 20180346720
    Abstract: The present invention relates to an ultra-thin black polyimide film and a method for preparing the same. The ultra-thin black polyimide film according to the present invention has a thickness of 8 ?m or less, and has not only an excellent gloss and a low light transmittance in the range of visible light, but also an excellent dimensional stability so as to be effectively used in products such as slim devices, coverlays, insulating films, or semiconductor devices, which need to have a good mechanical or thermal properties.
    Type: Application
    Filed: September 29, 2017
    Publication date: December 6, 2018
    Applicant: SKC KOLON PI Inc.
    Inventors: Kil Nam LEE, Jae Chul AHN, In Seok OH, Sang Hak LEE, Jae Baek LEE, Hyun Jai LIM
  • Publication number: 20170330598
    Abstract: Provided is a method and system for creating and using a video tag. A method configured as a computer may include creating tagging information by connecting information about at least one partial playback section in an entire playback section of a video to a tag designated by a user; and storing the tagging information in association with the at least one partial playback section instead of storing the at least one partial playback section.
    Type: Application
    Filed: August 3, 2016
    Publication date: November 16, 2017
    Inventors: Byung Gyou Choi, Jae Chul Ahn, Song Hyun Park