Patents by Inventor Shenghung Shih

Shenghung Shih 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: 7472147
    Abstract: A random number sequence output apparatus (101) includes a sequence acceptance unit (102) for accepting input of a numerical sequence, an initial value setting unit (103) for accepting an initial value and causing a storage unit (104) to store this, an output unit (105) for outputting a new value stored in the storage unit (104), a calculation unit (106) for applying a predetermined rational map stored in he storage unit (104) each time the output unit (105) outputs a value and further applying a predetermined calculation unit to the value and value extracted from the numerical sequence accepted by the sequence acceptance unit (102), and an updating unit (104) to store the value of the result of calculation performed by the calculation unit (106), thereby performing updating.
    Type: Grant
    Filed: November 5, 2002
    Date of Patent: December 30, 2008
    Assignees: Japan Science and Technology Agency
    Inventors: Ken Umeno, Shenghung Shih
  • Patent number: 7411997
    Abstract: A filter (201) accepts spreading code sequences or the like as input sequences of a chip rate 1/D, the accepted spreading code sequences are sequentially delayed and distributed by delay circuits (202) connected in series, delay times of individual signals are an arithmetical progression with a chip length D being a common difference D, the individual signals are amplified with spreading codes by amplifiers (203), amplification factors for the individual signals are a geometrical progression of a common ratio r, the sum of the amplified signals is obtained by addition in an adder (204), and the result is sequentially output as an output sequence.
    Type: Grant
    Filed: March 26, 2002
    Date of Patent: August 12, 2008
    Assignees: Japan Science and Technology Corporation, Chaosware Inc.
    Inventors: Ken Umeno, Shenghung Shih, Akihiro Yamaguchi
  • Publication number: 20050033785
    Abstract: A random number sequence output apparatus (101) includes a sequence acceptance unit (102) for accepting input of a numerical sequence, an initial value setting unit (103) for accepting an initial value and causing a storage unit (104) to store this, an output unit (105) for outputting a new value stored in the storage unit (104), a calculation unit (106) for applying a predetermined rational map stored in he storage unit (104) each time the output unit (105) outputs a value and further applying a predetermined calculation unit to the value and value extracted from the numerical sequence accepted by the sequence acceptance unit (102), and an updating unit (104) to store the value of the result of calculation performed by the calculation unit (106), thereby performing updating.
    Type: Application
    Filed: November 5, 2002
    Publication date: February 10, 2005
    Inventors: Ken Umeno, Shenghung Shih
  • Publication number: 20040146095
    Abstract: A filter (201) accepts spreading code sequences or the like as input sequences of a chip rate 1/D, the accepted spreading code sequences are sequentially delayed and distributed by delay circuits (202) connected in series, delay times of individual signals are an arithmetical progression with a chip length D being a common difference D, the individual signals are amplified with spreading codes by amplifiers (203), amplification factors for the individual signals are a geometrical progression of a common ratio r, the sum of the amplified signals is obtained by addition in an adder (204), and the result is sequentially output as an output sequence.
    Type: Application
    Filed: March 1, 2004
    Publication date: July 29, 2004
    Inventors: Ken Umeno, Shenghung Shih, Akihiro Yamaguchi