Patents by Inventor Kyu Chan Roh

Kyu Chan Roh 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).

  • Apparatus and method for partitioning moving picture data
    Patent number: 7474697
    Abstract: An apparatus for partitioning moving picture data comprises a first quantizing unit for first-quantizing a received video signal and outputting a first-quantized signal; and a second quantizing unit for second-quantizing the first-quantized signal and partitioning the first-quantized signal into a preceding part and a succeeding part.
    Type: Grant
    Filed: July 25, 2005
    Date of Patent: January 6, 2009
    Assignee: LG Electronics Inc.
    Inventor: Kyu Chan Roh
  • Fine granularity scalability encoding/decoding apparatus and method
    Patent number: 7003034
    Abstract: A fine granularity scalability encoding/decoding apparatus includes a first quantizer for performing a DCT on a motion-compensated image and quantizing a resulting value, a second quantizer for re-quantizing the value obtained by the first quantizer, an inverse-quantizer for re-quantizing a value re-quantized by the second quantizer, and a number of subtracters. A first subtracter obtains a difference between a value of N times the re-quantized value and the inverse-quantized value. A second subtracter obtains a difference between the value quantized by the first quantizer and the value quantized by the inverse-quantizer. And, a third subtracter subtracts the output value of the first subtracter from the output value of the second subtracter. Coding efficiency is increased and a bit-rate reduction of an entire coding stream is achieved by making an enhancement layer signal and a base layer signal have the same code.
    Type: Grant
    Filed: September 11, 2003
    Date of Patent: February 21, 2006
    Assignee: LG Electronics Inc.
    Inventor: Kyu-Chan Roh
  • Transcoding method and apparatus therefor
    Patent number: 6999512
    Abstract: A transcoding method and apparatus for converting a digital bitstream complying with a certain compression method into a digital bitstream complying with a different (or the same) compression method is provided. The transcoding apparatus performs conversion between compressed bitstreams having at least syntax elements and video elements corresponding to video data.
    Type: Grant
    Filed: May 25, 2001
    Date of Patent: February 14, 2006
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Kook Yeol Yoo, Yoon Soo Kim, Jae Kyoon Kim, Kwang Deok Seo, Kyu Chan Roh, Seong Cheol Heo
  • Apparatus and method for partitioning moving picture data
    Patent number: 6956900
    Abstract: An apparatus for partitioning moving picture data comprises a first quantizing unit for first-quantizing a received video signal and outputting a first-quantized signal; and a second quantizing unit for second-quantizing the first-quantized signal and partitioning the first-quantized signal into a preceding part and a succeeding part.
    Type: Grant
    Filed: August 25, 2003
    Date of Patent: October 18, 2005
    Assignee: LG Electronics Inc.
    Inventor: Kyu Chan Roh
  • Apparatus and method for partitioning moving picture data
    Publication number: 20040184536
    Abstract: An apparatus for partitioning moving picture data comprises a first quantizing unit for first-quantizing a received video signal and outputting a first-quantized signal; and a second quantizing unit for second-quantizing the first-quantized signal and partitioning the first-quantized signal into a preceding part and a succeeding part.
    Type: Application
    Filed: August 25, 2003
    Publication date: September 23, 2004
    Applicant: LG Electronics Inc.
    Inventor: Kyu Chan Roh
  • Fine granularity scalability encoding/decoding apparatus and method
    Publication number: 20040101052
    Abstract: A fine granularity scalability encoding/decoding apparatus includes a first quantizer for performing a DCT on a motion-compensated image and quantizing a resulting value, a second quantizer for re-quantizing the value obtained by the first quantizer, an inverse-quantizer for re-quantizing a value re-quantized by the second quantizer, and a number of subtracters. A first subtracter obtains a difference between a value of N times the re-quantized value and the inverse-quantized value. A second subtracter obtains a difference between the value quantized by the first quantizer and the value quantized by the inverse-quantizer. And, a third subtracter subtracts the output value of the first subtracter from the output value of the second subtracter. Coding efficiency is increased and a bit-rate reduction of an entire coding stream is achieved by making an enhancement layer signal and a base layer signal have the same code.
    Type: Application
    Filed: September 11, 2003
    Publication date: May 27, 2004
    Applicant: LG ELECTRONCIS INC.
    Inventor: Kyu-Chan Roh
  • Transcoding method and apparatus therefor
    Publication number: 20020110193
    Abstract: A transcoding method and apparatus for converting a digital bitstream complying with a certain compression method into a digital bitstream complying with a different (or the same) compression method is provided. The transcoding apparatus performs conversion between compressed bitstreams having at least syntax elements and video elements corresponding to video data.
    Type: Application
    Filed: May 25, 2001
    Publication date: August 15, 2002
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Kook Yeol Yoo, Yoon Soo Kim, Jae Kyoon Kim, Kwang Deok Seo, Kyu Chan Roh, Seong Cheol Heo