Patents by Inventor Tomoo Yamakage

Tomoo Yamakage 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).

  • Publication number: 20040117629
    Abstract: A digital watermark embedding apparatus includes a detector detecting a signal characteristic of at least one of an input image signal and the output image signal, and a controller controlling an embedding intensity of a digital watermark signal with respect to the input image signal in accordance with the signal characteristic.
    Type: Application
    Filed: August 28, 2003
    Publication date: June 17, 2004
    Inventors: Shinichiro Koto, Wataru Asano, Tomoo Yamakage
  • Patent number: 6741723
    Abstract: A specific frequency extraction unit extracts a specific frequency component signal from an input image signal, a phase controller and amplitude controller control at least one of the phase and amplitude of the specific frequency component signal in accordance with watermark information, and a watermark information superposition unit superposes the specific frequency component signal on the input image signal to generate an image signal embedded with the watermark information.
    Type: Grant
    Filed: December 24, 2002
    Date of Patent: May 25, 2004
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Tomoo Yamakage, Hirofumi Muratani, Hisashi Yamada, Toru Kambayashi, Shinichiro Koto
  • Publication number: 20030215091
    Abstract: A rendering device comprises a reader configured to read medium type information showing a classification of a content storage medium, encryption status information relating to an encryption status of content data stored in the content storage medium, and the content data from a target content storage medium, a detector configured to obtain copy control information embedded as a watermark in the content data, and a controller configured to control reproduce of the content data based on the medium type information, the encryption status information and the copy control information.
    Type: Application
    Filed: April 29, 2003
    Publication date: November 20, 2003
    Inventors: Toru Kambayashi, Hirofumi Muratani, Tomoo Yamakage, Hisashi Yamada, Taku Kato
  • Publication number: 20030108219
    Abstract: A digital watermark embedding apparatus comprises a digital watermark generating unit which transforms embedding target contents by using a filter having a coefficient with a periodic number sequence to generate a digital watermark, and an embedding unit which superposes the digital watermark on the embedding target contents to generate watermark embedded contents.
    Type: Application
    Filed: November 27, 2002
    Publication date: June 12, 2003
    Inventors: Hirofumi Muratani, Tooru Kambayashi, Tomoo Yamakage, Shinichiro Koto, Tomoya Kodama, Hisashi Yamada
  • Publication number: 20030098345
    Abstract: A recording apparatus includes a generation section configured to embed a new watermark in an original content containing an original watermark to generate a new content, and a recording section configured to record the new content.
    Type: Application
    Filed: March 22, 2002
    Publication date: May 29, 2003
    Inventors: Tadashi Kobayashi, Hideo Ando, Tomoo Yamakage, Hisashi Yamada
  • Publication number: 20030091213
    Abstract: A specific frequency extraction unit extracts a specific frequency component signal from an input image signal, a phase controller and amplitude controller control at least one of the phase and amplitude of the specific frequency component signal in accordance with watermark information, and a watermark information superposition unit superposes the specific frequency component signal on the input image signal to generate an image signal embedded with the watermark information.
    Type: Application
    Filed: December 24, 2002
    Publication date: May 15, 2003
    Inventors: Tomoo Yamakage, Hirofumi Muratani, Hisashi Yamada, Toru Kambayashi, Shinichiro Koto
  • Publication number: 20030065621
    Abstract: A rendering device to render a contents data comprises a reader, an information acquisition unit and a controller. The reader reads the contents data. The information acquisition unit acquires a copy control information. The controller controls rendering of the contents data while updating the acquired copy control information.
    Type: Application
    Filed: September 20, 2002
    Publication date: April 3, 2003
    Inventors: Toru Kambayashi, Tomoo Yamakage, Hisashi Yamada, Hirofumi Muratani
  • Patent number: 6108040
    Abstract: In a method of detecting motion vector data indicative of motion of a partial area in an input picture from any area on a reference picture, a first distortion between a partial area constructed by fields of the input picture and a partial area constructed by fields of the reference picture is calculated as a first evaluation value; a position of the partial area constructed by the fields of the reference picture at which the first evaluation value becomes the minimum value is detected; a search window on a frame of the reference picture is set on the basis of a detected position of the partial area constructed by the fields of the reference picture previously detected; and a second distortion between a partial area constructed by a frame in the set search window and a partial area constructed by a frame of the input picture is calculated as a second evaluation value, and a position of the partial area constructed by the frame of the reference picture at which the second evaluation value becomes the minimum v
    Type: Grant
    Filed: July 27, 1995
    Date of Patent: August 22, 2000
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Masataka Moteki, Yoshiharu Uetani, Tadahiro Oku, Tadaaki Masuda, Tomoo Yamakage, Toshinori Odaka
  • Patent number: 6016162
    Abstract: A video coding apparatus comprising a memory for storing a coded picture signal used as a reference picture signal, a vector detecting circuit for detecting, from plural field picture signals or plural frame picture signals which are read out from the memory and the reference picture signals, an optimum motion regarding a picture to be coded, a prediction signal producing circuit for subjecting a spatial-temporal filtering to a reference picture designated by the optimum motion vector to produce a prediction signal, and a coding circuit for coding the to-be coded picture signal on the basis of the prediction signal.
    Type: Grant
    Filed: April 3, 1998
    Date of Patent: January 18, 2000
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Toshinori Odaka, Yoshiharu Uetani, Tadaaki Masuda, Tomoo Yamakage, Hideyuki Ueno, Noboru Yamaguchi, Yoshihiro Kikuchi, Tadahiro Oku
  • Patent number: 6005627
    Abstract: A video coding apparatus comprising a memory for storing a coded picture signal used as a reference picture signal, a vector detecting circuit for detecting, from plural field picture signals or plural frame picture signals which are read out from the memory and the reference picture signals, an optimum motion regarding a picture to be coded, a prediction signal producing circuit for subjecting a spatial-temporal filtering to a reference picture designated by the optimum motion vector to produce a prediction signal, and a coding circuit for coding the to-be coded picture signal on the basis of the prediction signal.
    Type: Grant
    Filed: June 11, 1998
    Date of Patent: December 21, 1999
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Toshinori Odaka, Yoshiharu Uetani, Tadaaki Masuda, Tomoo Yamakage, Hideyuki Ueno, Noboru Yamaguchi, Yoshihiro Kikuchi, Tadahiro Oku
  • Patent number: 5986713
    Abstract: A video coding apparatus comprising a memory for storing a coded picture signal used as a reference picture signal, a vector detecting circuit for detecting, from plural field picture signals or plural frame picture signals which are read out from the memory and the reference picture signals, an optimum motion regarding a picture to be coded, a prediction signal producing circuit for subjecting a spatial-temporal filtering to a reference picture designated by the optimum motion vector to produce a prediction signal, and a coding circuit for coding the to-be coded picture signal on the basis of the prediction signal.
    Type: Grant
    Filed: June 11, 1998
    Date of Patent: November 16, 1999
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Toshinori Odaka, Yoshiharu Uetani, Tadaaki Masuda, Tomoo Yamakage, Hideyuki Ueno, Noboru Yamaguchi, Yoshihiro Kikuchi, Tadahiro Oku
  • Patent number: 5872597
    Abstract: A moving picture signal decoding system includes a processing order determination element having a logic calculation device for decoding additional data, determining as to whether an orthogonal transformation is performed with respect to a divided signal of each block or a residual signal after motion compensation, and changing a processing order in accordance with a determined content; a decoding element for decoding transformation coefficient data; an inverse scanning element for inversely scanning the transformation coefficient decoded by the decoding element; an inverse quantization element for inversely quantizing the transformation coefficient after inversely scanning; an inverse orthogonal transformation element for inversely and orthogonally transforming the inverse quantized signal; and a motion compensation element for compensating a motion on the basis of the additional data decoded by the processing order determination element; wherein the processing order determination element decompresses the ad
    Type: Grant
    Filed: July 16, 1996
    Date of Patent: February 16, 1999
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Tomoo Yamakage, Toshinori Odaka
  • Patent number: 5754231
    Abstract: A method for allocating bits to be used to compression code digital data signals representing a group of pictures in a motion video sequence. The pictures within each group of pictures to be coded are identified as being one of a plurality of different picture types. The total number of bits to be used in compression coding the group of pictures is determined based on a fixed target bit-rate. The number of bits for use in compression coding a picture in said group of pictures is allocated from said total number of bits using a number of pictures in each of the plurality of picture types in order to produce an allocation of bits which meet the fixed target bit-rate.
    Type: Grant
    Filed: April 3, 1996
    Date of Patent: May 19, 1998
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Toshinori Odaka, Yoshiharu Uetani, Tadaaki Masuda, Tomoo Yamakage, Hideyuki Ueno, Noboru Yamaguchi, Yoshihiro Kikuchi, Tadahiro Oku
  • Patent number: 5742344
    Abstract: A video coding apparatus comprising a memory for storing a coded picture signal used as a reference picture signal, a vector detecting circuit for detecting, from plural field picture signals or plural frame picture signals which are read out from the memory and the reference picture signals, an optimum motion regarding a picture to be coded, a prediction signal producing circuit for subjecting a spatial-temporal filtering to a reference picture designated by the optimum motion vector to produce a prediction signal, and a coding circuit for coding the to-be coded picture signal on the basis of the prediction signal.
    Type: Grant
    Filed: April 3, 1996
    Date of Patent: April 21, 1998
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Toshinori Odaka, Yoshiharu Uetani, Tadaaki Masuda, Tomoo Yamakage, Hideyuki Ueno, Noboru Yamaguchi, Yoshihiro Kikuchi, Tadahiro Oku
  • Patent number: 5647049
    Abstract: A video recording/reproducing apparatus having an encoder for encoding a video signal, and a recording unit for recording encoded information from the encoder on a digital recording medium, the encoder comprising a memory for storing at least first and second reference pictures, a prediction circuit for forming a prediction signal for an input signal, using a first reference signal from the first reference picture designated by a first motion vector, and a second reference signal from the second reference picture designated by a second motion vector, a first motion vector detector for determining a third motion vector from a point of intersection of the first motion vector and the second motion vector to a point in the second reference picture where the first motion vector intersects the second reference picture, a second motion vector detector for determining a differential motion vector by subtracting the third motion vector from the second motion vector, and an encoding circuit for encoding the first motio
    Type: Grant
    Filed: April 28, 1995
    Date of Patent: July 8, 1997
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Toshinori Odaka, Yoshiharu Uetani, Tadaaki Masuda, Tomoo Yamakage, Hideyuki Ueno, Noboru Yamaguchi, Yoshihiro Kikuchi, Tadahiro Oku
  • Patent number: 5623424
    Abstract: A method and system for re-encoding frames of a digital video stream in which selected areas are designated to have increased or reduced image quality, i.e., decreased or increased quantization levels, respectively, as compared to a previously run automatic encoding process, but without changing the previously calculated bit length of the stream. A set of macroblocks at a time are re-encoded, the number of resulting bits is calculated and the deviation from an estimated number of bits is calculated, either set-by-set or cumulatively. Based on the accuracy of the estimate and the remaining number of sets of macroblocks to re-encode, a correction factor for the quantization level of the next set of macroblocks is chosen from a lookup table. The correction factor is added to the quantization level of the next set of macroblocks and the results stored as the new quantization level of the set.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: April 22, 1997
    Assignees: Kabushiki Kaisha Toshiba, Time Warner Entertainment Co., L.P.
    Inventors: Faramarz Azadegan, Tomoo Yamakage, Shin-ichiro Koto, Hiroaki Unno, Hideki Mimura, Tetsuya Kitamura, Christopher J. Cookson, Greg B. Thagard, Andrew D. Rosen
  • Patent number: 5541661
    Abstract: A video coding apparatus includes a memory for storing a coded picture signal used as a reference picture signal, a vector detecting circuit for detecting, from plural field picture signals or plural frame picture signals which are read out from the memory and the reference picture signals, an optimum motion vector regarding a picture to be coded, a prediction signal producing circuit for subjecting a spatial-temporal filtering to a reference picture designated by the optimum motion vector to produce a prediction signal, and a coding circuit for coding the to-be-coded picture signal on the basis of the prediction signal.
    Type: Grant
    Filed: August 25, 1994
    Date of Patent: July 30, 1996
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Toshinori Odaka, Yoshiharu Uetani, Tadaaki Masuda, Tomoo Yamakage, Hideyuki Ueno, Noboru Yamaguchi, Yoshihiro Kikuchi, Tadahiro Oku
  • Patent number: 5467136
    Abstract: A video decoding apparatus including a memory for storing at least first and second reference pictures, a prediction signal forming circuit for forming a prediction signal to produce an output signal, using a first reference signal designated by a first motion vector for the first reference picture and a second reference signal designated by a second motion vector for the second reference picture read out of the memory. Also included is a decoding circuit for decoding the transmitted first motion vector and a transmitted motion vector difference, and for further decoding the second motion vector by adding a scaled motion vector and the motion vector difference. The scaled motion vector is derived by scaling the first motion vector to a motion vector for the second reference picture. Further included is a decoding circuit for decoding a transmitted difference signal and for obtaining the output signal by adding the difference signal and the prediction signal.
    Type: Grant
    Filed: February 17, 1994
    Date of Patent: November 14, 1995
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Toshinori Odaka, Yoshiharu Uetani, Tadaaki Masuda, Tomoo Yamakage, Hideyuki Ueno, Noboru Yamaguchi, Yoshihiro Kikuchi, Tadahiro Oku
  • Patent number: 5424779
    Abstract: A video coding apparatus comprises a memory for storing a coded picture signal used as a reference picture signal, a vector detecting circuit for detecting, from plural field picture signals or plural frame picture signals which are read out from the memory and the reference picture signals, an optimum motion vector regarding a picture to be coded, a prediction signal producing circuit for subjecting a spatial-temporal filtering to a reference picture designated by the optimum motion vector to produce a prediction signal, and a coding circuit for coding the to-be-coded picture signal on the basis of the prediction signal.
    Type: Grant
    Filed: November 24, 1993
    Date of Patent: June 13, 1995
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Toshinori Odaka, Yoshiharu Uetani, Tadaaki Masuda, Tomoo Yamakage, Hideyuki Ueno, Noboru Yamaguchi, Yoshihiro Kikuchi, Tadahiro Oku
  • Patent number: 5398078
    Abstract: A method of detecting a motion vector in an image coding apparatus, including blocking an input image block to be coded into a plurality of input blocks each consisting of a plurality of pixels; sub-sampling a coded image signal to obtain a coded and sub-sampled image signal; sub-sampling the input image block at a predetermined pixel interval to obtain a sub-sampled input block; searching a primary block most correlated with the sub-sampled input block from the coded and sub-sampled image signal in a predetermined range, to output a primary motion vector which indicates the primary block most correlated with the sub-sampled input blocks; and controlling at least one of a central position of a searching area and a searching pel accuracy in accordance with a type of the primary motion vector, to search a secondary block most correlated with one of the input blocks from a coded image signal, to obtain a secondary motion vector.
    Type: Grant
    Filed: October 30, 1992
    Date of Patent: March 14, 1995
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Tadaaki Masuda, Yoshiharu Uetani, Toshinori Odaka, Tadahiro Oku, Tomoo Yamakage