Patents by Inventor Katsuji Yoshimura

Katsuji Yoshimura 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: 4947448
    Abstract: An image information signal transmitting system for transmitting an image information signals which continuously forms a temporally correlated group of image planes is arranged to divide each image plane portions of the image information signal into a plurality of blocks; and, in determining for every divided block included in each of the image planes the adoption of one of a plurality of information transmitting modes provided for different information transmitting density values, the information transmitting modes for the plurality of blocks of a presently transmitting image plane portion of the signal are determined at least according to the information transmitting modes which hae been used for the plurality of blocks of a previously transmitted image plane portion of the signal.
    Type: Grant
    Filed: November 21, 1988
    Date of Patent: August 7, 1990
    Assignee: Canon Kabushiki Kaisha
    Inventors: Tadayoshi Nakayama, Chikara Sato, Kenichi Nagasawa, Tomohiko Sasatani, Koji Takahashi, Susumu Kozuki, Katsuji Yoshimura
  • Patent number: 4932066
    Abstract: A system for transmitting information signal in which a temporally correlated group of image planes are continuously formed comprises: dividing means which divides the information signal into separate image planes and further divides each image plane portion of the signal into a plurality of blocks; first transmitting means for transmitting in a first degree of information density the first of the plurality of blocks obtained from the dividing means; second transmitting means for transmitting in a second degree of information density the second of the plurality of divided blocks obtained from the dividing means; and transmission inhibiting means for inhibiting transmission of the third of the plurality of divided blocks obtained from the dividing means by dividing a present image plane portion of the information signal.
    Type: Grant
    Filed: November 23, 1988
    Date of Patent: June 5, 1990
    Assignee: Canon Kabushiki Kaisha
    Inventors: Tadayoshi Nakayama, Chikara Sato, Kenichi Nagasawa, Tomohiko Sasatani, Katsuji Yoshimura, Koji Takahashi, Susumu Kozuki
  • Patent number: 4916537
    Abstract: An image information signal transmitting system according to the present invention is structured in such a manner that an image information signal composed of a plurality of picture element data corresponding to one picture is stored in units of blocks each of which is composed of a predetermined number of picture element data, the image information signal composed of a plurality of picture element data corresponding to one picture is divided into the blocks, and picture element data is extracted from the thus-divided blocks by a number smaller than the number of picture element data forming the block, and the extracted picture element is stored in units of corresponding blocks.
    Type: Grant
    Filed: March 27, 1989
    Date of Patent: April 10, 1990
    Assignee: Canon Kabushiki Kaisha
    Inventors: Tadayoshi Nakayama, Hisashi Ishikawa, Susumu Kozuki, Koji Takahashi, Katsuji Yoshimura, Kenichi Nagasawa, Tomohiko Sasatani
  • Patent number: 4901148
    Abstract: A data processing device having a memory which permits writing and reading of digital data and a digital-to-analog converter which converts digital data read out from the memory into an analog signal. The operating frequency of the converter obtained when the memory is solely performing data reading is arranged to be twice as high as the operating frequency of the converter obtained when the memory is performing both data writing and data reading.
    Type: Grant
    Filed: January 14, 1988
    Date of Patent: February 13, 1990
    Assignee: Canon Kabushiki Kaisha
    Inventors: Tadayoshi Nakayama, Chikara Satoh, Akio Fujii, Katsuji Yoshimura, Koji Takahashi
  • Patent number: 4901119
    Abstract: A video signal recording and/or reproduction apparatus in which an analog video signal from the inlet is digitized to form video data, then the video data are stored in a memory means for a time, then the stored video data are read out from the memory means before they are recorded on a recording medium. When reproducing the recorded video data from the recording medium, the reproduced video data are stored in a memory means for a time, then the stored video data are read out from the memory means, then the analog video signal is restored from the read video data, and then the analog video signal is produced at the output of the apparatus. Further, by taking the synchronism of the write and read control signals of different frequency for either of the memory means of the recording and reproducing systems, it is made possible to assure accurate and reliable conversion between the analog and digital forms of the video signals when either in the record or in the reproduction mode.
    Type: Grant
    Filed: November 15, 1988
    Date of Patent: February 13, 1990
    Assignee: Canon Kabushiki Kaisha
    Inventors: Katsuji Yoshimura, Toshiyuki Masui, Chikara Sato, Tadayoshi Nakayama
  • Patent number: 4901152
    Abstract: An image pickup apparatus which alternately performs 1/n-sec light storage and 1/m-sec light storage (m>n), and outputs an image pickup signal obtained by mixing a 1/n-sec stored image and a 1/m-sec stored image. The apparatus has a circuit for separately controlling white balance of the 1/n-sec stored image portion and the 1/m-sec stored image portion.
    Type: Grant
    Filed: August 25, 1988
    Date of Patent: February 13, 1990
    Assignee: Canon Kabushiki Kaisha
    Inventors: Teruo Hieda, Toshiyuki Masui, Koji Takahashi, Katsuji Yoshimura
  • Patent number: 4896219
    Abstract: A color video signal reproducing apparatus for reproducing a color video signal from a recording medium on which at least luminance and chrominance signals are recorded in the form of a multiplexed signal is arranged to reproduce the multiplexed signal from the recording medium; to separate the luminance and chrominance signals from the reproduced multiplexed signal; and to demodulate and convert the chrominance signal into a plurality of different base-band signals. This arrangement permits a correcting operation to be accomplished on the color information of the reproduced color video signal wihtout deteriorating the color information with simple structural arrangement.
    Type: Grant
    Filed: April 16, 1987
    Date of Patent: January 23, 1990
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hiroto Yasumura, Masahide Hirasawa, Minoru Noji, Susumu Kozuki, Koji Takahashi, Katsuji Yoshimura
  • Patent number: 4882615
    Abstract: The video processing apparatus according to this invention is constructed to receive a composite television signal having frequency-multiplexed luminance and chrominance signals. The composite color television signal is divided into a plurality of picture element signals by sampling it, and the luminance and chrominance signals frequency-multiplexed in each of the plurality of picture element signals are separated. An arbitrary one of the plurality of picture element signals is extracted as a remark picture element. A plurality of picture element signals whose chrominance signal frequency multiplexed therein is of the same phase as that of the chrominance signal frequency multiplexed in said remark picture element signal is extracted as first reference picture element signals.
    Type: Grant
    Filed: September 28, 1988
    Date of Patent: November 21, 1989
    Assignee: Canon Kabushiki Kaisha
    Inventors: Katsuji Yoshimura, Tadayoshi Nakayama, Hisashi Ishikawa, Chikara Sato
  • Patent number: 4882632
    Abstract: The present invention is directed to a reproducing apparatus for reproducing a composite signal from a record bearing medium on which said composite signal is recorded, said composite signal being formed by frequency multiplexing a frequency-modulated luminance signal and a low-band converted carrier chrominance signal which is obtained by frequency-converting a carrier chrominance signal from a high frequency band to a low frequency band. The recording apparatus is constructed to separate the frequency-modulated luminance signal and the low-band converted carrier chrominance signal from the composite signal reproduced from said record bearing medium, to demodulate the frequency-modulated luminance signal to restore the luminance signal, to convert the low-band converted carrier chrominance signal into two kinds of color difference signals and to form R, G and B signals from the luminance signal and the two kinds of color-difference signals thus obtained.
    Type: Grant
    Filed: October 21, 1987
    Date of Patent: November 21, 1989
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hiroto Yasumura, Masahide Hirasawa, Minoru Noji, Susumu Kozuki, Koji Takahashi, Katsuji Yoshimura
  • Patent number: 4878128
    Abstract: A video signal reproducing apparatus having a video camera part which produces a video signal by picking up an image of an object and is arranged in one unified body at least with a reproducing part which reproduces a video signal from a reducing medium is arranged to selectively supply the video signal obtained by picking up the object's image or the reproduced video signal obtained from the recording medium to one and the same signal processing means. The disclosed arrangement not only permits simplification of the apparatus but also enables the apparatus to reproduce a high quality video signal.
    Type: Grant
    Filed: May 5, 1987
    Date of Patent: October 31, 1989
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hiroto Yasumura, Masahide Hirasawa, Minoru Noji, Susumu Kozuki, Koji Takahashi, Katsuji Yoshimura, Tomohiko Sasatani
  • Patent number: 4873587
    Abstract: A video signal reproducing apparatus for reproducing video signals from a record bearing medium on which many recording tracks are formed in parallel to each other with a given-period portion of the video signal recorded in each of the tracks are arranged: To compare, on the basis of signals reproduced by a reproducing head, the level of a reference signal with that of a reproduced state detection signal the level of which varies according to the reproduced state of the video signal; to determine, on the basis of the result of comparison, whether or not the video signal reproduced by the reproducing head is to be written into a memory device which is capable of storing the given-period portion of the video signal therein; and to change a level relation between the reproduced state detection signal and the reference signal from one level relation over to another according to the track pitch of the recording tracks which is detected using the signals reproduced by the reproducing head.
    Type: Grant
    Filed: August 25, 1987
    Date of Patent: October 10, 1989
    Assignee: Canon Kabushiki Kaisha
    Inventors: Katsuji Yoshimura, Susumu Kozuki, Hiroo Edakubo, Chikara Sato
  • Patent number: 4870510
    Abstract: In a video signal reproducing apparatus of the kind reproducing a video signal from a record bearing medium on which a predetermined period portion of the video signal is recorded together with a pilot signal in each of many recording tracks formed in parallel with each other: a tracking error signal is generated on the basis of pilot signals reproduced by a reproducing head; and each of the predetermined period portions of the video signal reproduced by the reproducing head is determined to be or not to be stored at a memory which is capable of storing the portion of said video signal covering a predetermined period of time.
    Type: Grant
    Filed: June 4, 1987
    Date of Patent: September 26, 1989
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hiroo Edakubo, Chikara Sato, Susumu Kozuki, Katsuji Yoshimura
  • Patent number: 4864430
    Abstract: A video signal reproducing apparatus is provided with a memory which is capable of storing a portion of a video signal covering a predetermined period of time and is arranged: To allow a record bearing medium on which the predetermined period portion of the video signal is recorded in each of many recording tracks formed in parallel to travel at a given speed different from a speed employed in recording; and to decide whether or not each of the video signal portions reproduced by a reproducing head is to be stored by making the decision on the basis of the signal reproduced from each of the tracks by the reproducing head.
    Type: Grant
    Filed: June 16, 1987
    Date of Patent: September 5, 1989
    Assignee: Canon Kabushiki Kaisha
    Inventors: Katsuji Yoshimura, Susumu Kozuki, Hiroo Edakubo, Chikara Sato, Koji Takahashi
  • Patent number: 4862292
    Abstract: A digital information signal recording apparatus has a first mode in which a digital information signal of one channel is recorded on a recording medium at a given bit rate and a second mode in which digital information signals of n channels (n: an integer which is at least 2) are simultaneously recorded on the recording medium at a bit rate which is 1/n of the given bit rate.
    Type: Grant
    Filed: August 22, 1988
    Date of Patent: August 29, 1989
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masahiko Enari, Katsuji Yoshimura, Akio Aoki, Shinichi Yamashita, Makoto Shimokoriyama, Motokazu Kashida, Tetsuya Shimizu, Yoshiki Ishii, Akio Fujii
  • Patent number: 4849833
    Abstract: An image signal recording apparatus of the kind handling and recording on a recording medium an image signal which corresponds to a still image consisting of a plurality of horizontal scanning lines and which consists of a plurality of horizontal scanning line information signals corresponding to the horizontal scanning lines is arranged to receive the image signal by the unit of the horizontal scanning line information signal; to obtain horizontal scanning line information data by digitizing the horizontal scanning line information signals; and to form an n number (n: an integer which is at least one) of recording tracks on the recording medium by recording on the medium the horizontal scanning line information data which corresponds to an m number (m: an integer which can be expressed as 1.ltoreq.m.ltoreq.10) of horizontal scanning lines.
    Type: Grant
    Filed: July 27, 1987
    Date of Patent: July 18, 1989
    Assignee: Canon Kabushiki Kaisha
    Inventors: Katsuji Yoshimura, Toshiyuki Masui, Chikara Sato, Tadayoshi Nakayama
  • Patent number: 4843334
    Abstract: A frequency demodulating device is arranged to supply a frequency modulated signal and a separately generated signal to an analog multiplying circuit and to perform frequency demodulation by supplying the output signal of the analog multiplying circuit to a frequency demodulation circuit via a high-pass filter.
    Type: Grant
    Filed: December 2, 1987
    Date of Patent: June 27, 1989
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hisashi Ishikawa, Katsuji Yoshimura
  • Patent number: 4812920
    Abstract: A wide band video signal recording apparatus is arranged to simultaneously record, on a recording medium, multi-channel video signals which are obtained by frequency modulating a luminance signal included in a wide band video signal; by frequency dividing the frequency modulated luminance signal at different phases thereof to obtain multi-channel luminance signals; and by multiplexing a carrier chrominance signal included in the video signal with the low band of at least one of the multi-channel luminance signals.
    Type: Grant
    Filed: July 1, 1987
    Date of Patent: March 14, 1989
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yoshitake Nagashima, Hisashi Ishikawa, Susumu Kozuki, Katsuji Yoshimura, Koji Takahashi, Kenichi Nagasawa
  • Patent number: 4772944
    Abstract: A stereoscopic image signal processing device provides that, while a stereoscopic image signal in the form of a plurality of types of time-divisionally multiplexed image information signals is input thereto, a prescribed one of the plurality of types of image information signals is sampled from the input stereoscopic image signal by detecting the time of changeover between any two types of all the image information signals, and is memorized so that, by using the memorized image information signal, only the prescribed type of image information signal is output.
    Type: Grant
    Filed: July 15, 1987
    Date of Patent: September 20, 1988
    Assignee: Canon Kabushiki Kaisha
    Inventor: Katsuji Yoshimura
  • Patent number: 4755878
    Abstract: A system for transmitting an image information signal which continuously forms a temporally correlated group of image planes is arranged to divide each image plane portion of the image information signal into a plurality of blocks; to have a plurality of different information transmitting modes of transmitting the image information signal in different degrees of information density including a mode in which a present image plane portion of the image information signal is not transmitted; to form a transmitting information signal on the basis of applicable one of the plurality of the different information transmitting modes; to generate for each of the blocks a transmitting mode signal including information indicating use or nonuse of the information transmitting mode in which the present image plane portion of the image information signal is not transmitted; and to transmit the transmitting information signal and the transmitting mode signal in a multiplexing manner.
    Type: Grant
    Filed: November 19, 1986
    Date of Patent: July 5, 1988
    Assignee: Canon Kabushiki Kaisha
    Inventors: Tadayoshi Nakayama, Chikara Sato, Kenichi Nagasawa, Tomohiko Sasatani, Koji Takahashi, Susumu Kozuki, Katsuji Yoshimura