Patents by Inventor Tadashi Takaba

Tadashi Takaba 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).

  • SIP server
    Patent number: 7639676
    Abstract: The number of simultaneous connections to a SIP server is increased without degrading overall performance. If it is judged that, when a newly requested call is accepted, the number of calls whose call control data is stored in a call processing memory or the amount of the call control data stored in the call processing memory would exceed an upper limit, the call control data stored in the call processing memory for a busy call is saved in an external storage device. As the frequency of occurrence of an event is low in the case of a busy call, it becomes possible to accept the new call without degrading overall performance.
    Type: Grant
    Filed: September 21, 2004
    Date of Patent: December 29, 2009
    Assignee: Fujitsu Limited
    Inventors: Minoru Nishida, Kousei Kataoka, Miwa Kususe, Tadashi Takaba
  • Multimedia signal processing apparatus
    Patent number: 6978145
    Abstract: A multimedia signal processing apparatus comprises communication service units having a plurality of types of signal processing modes corresponding to a plurality of types of communication service classifications, a communication service classification identifying unit for identifying, on the basis of signal processing request information on one call communicated from a higher-rank node, a communication service classification for that call, and a mode control unit for controlling a signal processing mode of the communication service unit to a mode suitable for the communication service classification identified in the communication service classification identifying unit.
    Type: Grant
    Filed: March 8, 2001
    Date of Patent: December 20, 2005
    Assignee: Fujitsu Limited
    Inventors: Tadashi Takaba, Masanobu Shigyo, Yukimasa Takahira, Junji Satoh, Kusuo Yonezawa, Hidetoshi Kawakami, Koji Kawase, Hiroshi Itoh
  • SIP server
    Publication number: 20050207358
    Abstract: The number of simultaneous connections to a SIP server is increased without degrading overall performance. If it is judged that, when a newly requested call is accepted, the number of calls whose call control data is stored in a call processing memory or the amount of the call control data stored in the call processing memory would exceed an upper limit, the call control data stored in the call processing memory for a busy call is saved in an external storage device. As the frequency of occurrence of an event is low in the case of a busy call, it becomes possible to accept the new call without degrading overall performance.
    Type: Application
    Filed: September 21, 2004
    Publication date: September 22, 2005
    Inventors: Minoru Nishida, Kousei Kataoka, Miwa Kususe, Tadashi Takaba
  • Multimedia signal processing apparatus
    Publication number: 20020028695
    Abstract: A multimedia signal processing apparatus comprises communication service units having a plurality of types of signal processing modes corresponding to a plurality of types of communication service classifications, a communication service classification identifying unit for identifying, on the basis of signal processing request information on one call communicated from a higher-rank node, a communication service classification for that call, and a mode control unit for controlling a signal processing mode of the communication service unit to a mode suitable for the communication service classification identified in the communication service classification identifying unit.
    Type: Application
    Filed: March 8, 2001
    Publication date: March 7, 2002
    Inventors: Tadashi Takaba, Masanobu Shigyo, Yukimasa Takahira, Junji Satoh, Kusuo Yonezawa, Hidetoshi Kawakami, Koji Kawase, Hiroshi Itoh