Patents by Inventor Teiichi Ichikawa

Teiichi Ichikawa 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: 6026232
    Abstract: A method and system in which a section of a previously encoded digital bit stream is replaced with another section of encoded video. In order to remove a section of encoded video, it is necessary to determine the beginning and ending points of the encoded video in the digitally encoded bit stream. The addresses of the beginning and ending points of the encoded data cannot be simply looked up but are calculated by summing the bits consumed by each picture, the number of bits of the sequence header of each picture, the number of bits of each Group of Pictures (GOP) header, and all stuff bits. In order to encode the video which is to be inserted in place of the removed video, a process is performed which prevents decoding artifacts from appearing. This is accomplished by determining the last P-picture before the edit point and using it as a reference frame for frames after the edit point.
    Type: Grant
    Filed: July 13, 1995
    Date of Patent: February 15, 2000
    Assignees: Kabushiki Kaisha Toshiba, Time Warner Entertainment Co., L.P.
    Inventors: Jay Yogeshwar, Sheau-Bao Ng, Teiichi Ichikawa, Hiroaki Unno, Hideki Mimura, Tetsuya Kitamura, Christopher J. Cookson, Greg B. Thagard, Andrew Drusin Rosen
  • Patent number: 5838874
    Abstract: An audiovisual encoding system using a multipass video encoder and a plurality of one-pass audio encoders. The number of audio encoders used by the system is equal to the number of audio tracks to be encoded divided by the number of passes required for the video encoding rounded up to the nearest integer, if necessary. The system allows the video encoder and audio encoders to be used at the same time so that the encoding of the video is completed at the same time as the encoding of all audio tracks is completed, using the minimum number of audio encoders.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: November 17, 1998
    Assignees: Kabushiki Kaisha Toshiba, Time Warner Entertainment Co., L.P.
    Inventors: Sheau-Bao Ng, Mikhail Tsinberg, Masaru Sakurai, David Lehmann, Jay Yogeshwar, Faramarz Azadegan, Teiichi Ichikawa, Hiroaki Unno, Hideki Mimura, Tetsuya Kitamura, Christopher J. Cookson, Greg B. Thagard, Andrew Drusin Rosen
  • Patent number: 5742732
    Abstract: A data stream multiplexing apparatus having a stream modifier for producing modified sub-picture data stream from a sub picture data stream where a first sub-picture data unit containing pixel data forming a sub-picture image with a preset display time period is located along a time axis by additionally locating at least one of second sub-picture data unit having almost same contents as the first sub-picture data unit within the display time period of the first sub-picture data unit on the sub-picture data stream, and a multiplexer responsive to input modified sub-picture data stream produced by the stream modifying means and other data streams reproduced in synchronous with the modified sub-picture data stream, for multiplexing these streams after packetizing them by a prescribed length.
    Type: Grant
    Filed: May 31, 1996
    Date of Patent: April 21, 1998
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Yumiko Kubo, Teiichi Ichikawa