Patents by Inventor Akihiko Umehara

Akihiko Umehara 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: 20010016856
    Abstract: An electronic-form preparation system is disclosed. The system includes a coordinate-input device, and a data processor. The coordinate-input device includes an input pen having a writing member for handwriting characters into a form, and a transmitter provided in the vicinity of a tip of the writing member for emitting a signal when making entries into the form by the pen is started. The coordinate-input device further includes a plurality of receivers spaced from each other and receiving the signal emitted from the transmitter, and a signal processing circuit for determining coordinates of a series of points constituting a part of a locus of a character handwritten into the form by the pen on the basis of timing of reception of the signal by each of the receivers. The data processor generates data of an electronic form to be displayed on a display on the basis of the determined coordinates.
    Type: Application
    Filed: January 30, 2001
    Publication date: August 23, 2001
    Applicant: Oki Data Corporation
    Inventors: Kenzo Tsuji, Akihiko Umehara
  • Patent number: 4513436
    Abstract: Speech recognition with time warp is simplified by finding a certain portion of a word whose time duration is the same for all speakers. In comparing an unknown speech with a reference speech, the time duration of an unknown speech is coincided with the time length of a reference speech with the two processes. According to the invention, an element vector of a speech is classified to the first portion and the second portion. The former is a consonant and co-articulation which couples the two sounds, and the latter is a vowel. The length of the first portion is almost independent from a speaker, and the length of the second portion depends upon a speaker. Therefore, the present invention matches the first portion of an unknown speech with that of the reference speech directly without changing the time length. Next, the sample elements in the second portion of the unknown speech is linearly matched with that of a reference speech. Thus, excellent recognition is obtained using a simple calculation.
    Type: Grant
    Filed: February 23, 1984
    Date of Patent: April 23, 1985
    Assignee: Oki Electric Industry, Co., Ltd.
    Inventors: Isamu Nose, Akihiko Umehara