Patents by Inventor Kenichi Imai

Kenichi Imai 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: 6036438
    Abstract: An optimum axial distance is secured by varying the distance between a nozzle blade and a moving blade along the length of a nozzle blade (11). The nozzle blades (11) are curved so that a middle portion of each nozzle blade has a section (b2) dislocated in the flowing direction of a fluid which flows through the fluid passage relative to the root section (b3) and the tip section (b1) of the blade with respect to a circumferential direction and an axial direction. Outlet flow angle of the nozzle is varied with distance along the blade length to vary optimum axial distance properly.
    Type: Grant
    Filed: December 5, 1997
    Date of Patent: March 14, 2000
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Kenichi Imai
  • Patent number: 5864800
    Abstract: A digital signal processing method and apparatus processes a signal obtained on splitting the entire frequency band of an input digital signal into a plurality of sub-bands. The entire frequency band of the input digital signal is split into a plurality of sub-bands, and signals of each sub-band are allocated to a plurality of sub-words divided from a word of the input digital signal. In allocating the signals, the information for reducing the noise in at least one of the sub-bands is allocated to the sub-word different from the sub-word to which is allocated the signal of the sub-band whose noise is to be reduced.
    Type: Grant
    Filed: January 4, 1996
    Date of Patent: January 26, 1999
    Assignee: Sony Corporation
    Inventors: Kenichi Imai, Mitsuru Hanajima, Kenzo Akagiri
  • Patent number: 5687157
    Abstract: An audio signal recording and reproduction apparatus enabling a low frequency band signal component to be reproduced by existing reproduction apparatuses and a high frequency band component to be processed as well. A digital audio signal is divided into a low frequency band signal component and high frequency band signal component by a frequency band division filter. The low band signal component is subjected to straight PCM processing to maintain compatibility with existing reproduction methods. The high frequency band signal component is subjected to high frequency coding through a requantization circuit and entropy coding circuit. A comparison circuit compares the straight PCM signals and the high efficiency coded signals to determine if they will fit into a predetermined bit length and, when not fitting, causes the requantization circuit to perform requantization to shorten the bit length.
    Type: Grant
    Filed: July 18, 1995
    Date of Patent: November 11, 1997
    Assignee: Sony Corporation
    Inventors: Kenichi Imai, Tadao Suzuki, Kenzo Akagiri, Makoto Akune