Patents by Inventor Akira Mukaiyama

Akira Mukaiyama 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: 8386973
    Abstract: Disclosed is a behavioral synthesis apparatus for generating a test bench where the same test vector can be used in both the behavioral simulation and the RTL simulation. The apparatus includes input application/output signal observation timing signal generation means that generates an input application timing signal, an output observation timing signal, and logic circuits for the input application timing signal and the output observation timing signal; and test bench generation means that generates a test bench that observes the signals, applies inputs, and observes outputs.
    Type: Grant
    Filed: December 23, 2011
    Date of Patent: February 26, 2013
    Assignee: NEC Corporation
    Inventors: Takashi Takenaka, Akira Mukaiyama, Kazutoshi Wakabayashi
  • Publication number: 20120096418
    Abstract: Disclosed is a behavioral synthesis apparatus for generating a test bench where the same test vector can be used in both the behavioral simulation and the RTL simulation. The apparatus includes input application/output signal observation timing signal generation means that generates an input application timing signal, an output observation timing signal, and logic circuits for the input application timing signal and the output observation timing signal; and test bench generation means that generates a test bench that observes the signals, applies inputs, and observes outputs.
    Type: Application
    Filed: December 23, 2011
    Publication date: April 19, 2012
    Applicant: NEC CORPORATION
    Inventors: Takashi TAKENAKA, Akira MUKAIYAMA, Kazutoshi WAKABAYASHI
  • Patent number: 8091051
    Abstract: Disclosed is a behavioral synthesis apparatus for generating a test bench where the same test vector can be used in both the behavioral simulation and the RTL simulation. The apparatus includes input application/output signal observation timing signal generation means that generates an input application timing signal, an output observation timing signal, and logic circuits for the input application timing signal and the output observation timing signal; and test bench generation means that generates a test bench that observes the signals, applies inputs, and observes outputs.
    Type: Grant
    Filed: January 30, 2008
    Date of Patent: January 3, 2012
    Assignee: NEC Corporation
    Inventors: Takashi Takenaka, Akira Mukaiyama, Kazutoshi Wakabayashi
  • Publication number: 20100088656
    Abstract: Checking efficiency of property checking is improved. The operation synthesis tool synthesizes an RTL circuit description from a behavioral level circuit description. In addition, the property generating unit generates a behavioral level property from the behavioral level circuit description. Subsequently, the property converting unit converts the generated behavioral level property into an RTL property. The model checking unit then checks the RTL circuit description by model checking technique using the RTL property.
    Type: Application
    Filed: March 25, 2009
    Publication date: April 8, 2010
    Inventor: Akira MUKAIYAMA
  • Publication number: 20090249269
    Abstract: Checking efficiency of property checking is improved. The operation synthesis tool synthesizes an RTL circuit description from a behavioral level circuit description. In addition, the property generating unit generates a behavioral level property from the behavioral level circuit description. Subsequently, the property converting unit converts the generated behavioral level property into an RTL property. The model checking unit then checks the RTL circuit description by model checking technique using the RTL property.
    Type: Application
    Filed: March 24, 2009
    Publication date: October 1, 2009
    Inventor: AKIRA MUKAIYAMA
  • Publication number: 20080184180
    Abstract: Disclosed is a behavioral synthesis apparatus for generating a test bench where the same test vector can be used in both the behavioral simulation and the RTL simulation. The apparatus includes input application/output signal observation timing signal generation means that generates an input application timing signal, an output observation timing signal, and logic circuits for the input application timing signal and the output observation timing signal; and test bench generation means that generates a test bench that observes the signals, applies inputs, and observes outputs.
    Type: Application
    Filed: January 30, 2008
    Publication date: July 31, 2008
    Applicant: NEC CORPORATION
    Inventors: Takashi TAKENAKA, Akira MUKAIYAMA, Kazutoshi WAKABAYASHI
  • Publication number: 20080072195
    Abstract: A validation processing apparatus is to be provided, which allows a user to easily check whether a request designated by the user is satisfied by a data processing system, which is the object to be validated, and to easily check a result of coverage measurement in the data processing system based on a coverage metrics designated by the user. The validation processing apparatus acquires a state transition graph of the data processing system, being the object to be validated; acquires the request to the data processing system; and acquires a coverage metrics indicating events to be included in the validation range of the data processing system. Then the validation processing apparatus validates whether the acquired state transition graph satisfies the request; measures the coverage in the state transition graph according to the acquired coverage metrics; and outputs a result.
    Type: Application
    Filed: September 13, 2007
    Publication date: March 20, 2008
    Applicant: NEC Corporation
    Inventor: Akira MUKAIYAMA
  • Patent number: 6163876
    Abstract: A complete procedure for verifying register-transfer logic against its scheduled behavior in a high-level synthesis environment is provided. A new method that is both complete and practical for verification is provided. Hardware verification is known to be a hard problem and the proposed verification technique leverages off the fact that high-level synthesis--performed manually or by means of high-level synthesis software--proceeds from the algorithmic description of the design to structural RTL through a sequence of very well defined steps, each limited in its scope. Equivalence checking task is partitioned into two simpler subtasks, verifying the validity of register sharing, and verifying correct synthesis of the RYL interconnect and control. While state space traversal is unavoidable for verifying validity of the register sharing, irrelevant portions of the design are automatically abstracted out, significantly simplifying the task that must be performed by a back-end model checker.
    Type: Grant
    Filed: November 6, 1998
    Date of Patent: December 19, 2000
    Assignee: NEC USA, Inc.
    Inventors: Pranav Ashar, Subhrajit Bhattacharya, Anand Raghunathan, Akira Mukaiyama