Patents by Inventor Makoto Oohashi

Makoto Oohashi 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).

  • DTMF signal transmission method and communication apparatus
    Patent number: 7532606
    Abstract: A communication apparatus connected to a PBX and an ATM network is provided with a DTMF signal detecting portion for detecting whether or not a DTMF signal is contained in a voice signal from the PBX, a DTMF signal monitoring portion, a DTMF cell generating portion for coding and sending out a DTMF signal, a DTMF cell decomposing portion for decoding a coded DTMF signal and a DTMF signal generating portion for generating a DTMF signal on the basis of the information content of a decoded DTMF signal and sending out this DTMF signal to the PBX, and the transmission side communication apparatus codes a DTMF signal in a specified form and transmits the DTMF signal and the reception side communication apparatus decodes the coded DTMF signal and, on the basis of this content information, restores the DTMF signal in a DTMF signal generating portion.
    Type: Grant
    Filed: February 23, 2004
    Date of Patent: May 12, 2009
    Assignee: Hitachi Telecom Technologies, Ltd
    Inventors: Shinya Suzuki, Kimitoshi Takeuchi, Toru Yoshihara, Makoto Oohashi
  • DTMF signal transmission method and communication apparatus
    Patent number: 7062033
    Abstract: A communication apparatus connected to a PBX and an ATM network is provided with a DTMF signal detecting portion for detecting whether or not a DTMF signal is contained in a voice signal from the PBX, a DTMF signal monitoring portion, a DTMF cell generating portion for coding and sending out a DTMF signal, a DTMF cell decomposing portion for decoding a coded DTMF signal and a DTMF signal generating portion for generating a DTMF signal on the basis of the information content of a decoded DTMF signal and sending out this DTMF signal to the PBX, and the transmission side communication apparatus codes a DTMF signal in a specified form and transmits the DTMF signal and the reception side communication apparatus decodes the coded DTMF signal and, on the basis of this content information, restores the DTMF signal in a DTMF signal generating portion.
    Type: Grant
    Filed: February 23, 2004
    Date of Patent: June 13, 2006
    Assignee: Hitachi Telecom Technologies, Ltd.
    Inventors: Shinya Suzuki, Kimitoshi Takeuchi, Toru Yoshihara, Makoto Oohashi
  • DTMF signal transmission method and communication apparatus
    Patent number: 7050570
    Abstract: A communication apparatus connected to a PBX and an ATM network is provided with a DTMF signal detecting portion for detecting whether or not a DTMF signal is contained in a voice signal from the PBX, a DTMF signal monitoring portion, a DTMF cell generating portion for coding and sending out a DTMF signal, a DTMF cell decomposing portion for decoding a coded DTMF signal and a DTMF signal generating portion for generating a DTMF signal on the basis of the information content of a decoded DTMF signal and sending out this DTMF signal to the PBX, and the transmission side communication apparatus codes a DTMF signal in a specified form and transmits the DTMF signal and the reception side communication apparatus decodes the coded DTMF signal and, on the basis of this content information, restores the DTMF signal in a DTMF signal generating portion.
    Type: Grant
    Filed: February 23, 2004
    Date of Patent: May 23, 2006
    Assignee: Hitachi Telecom Technologies, Ltd.
    Inventors: Shinya Suzuki, Kimitoshi Takeuchi, Toru Yoshihara, Makoto Oohashi
  • DTMF signal transmission method and communication apparatus
    Publication number: 20040161098
    Abstract: A communication apparatus connected to a PBX and an ATM network is provided with a DTMF signal detecting portion for detecting whether or not a DTMF signal is contained in a voice signal from the PBX, a DTMF signal monitoring portion, a DTMF cell generating portion for coding and sending out a DTMF signal, a DTMF cell decomposing portion for decoding a coded DTMF signal and a DTMF signal generating portion for generating a DTMF signal on the basis of the information content of a decoded DTMF signal and sending out this DTMF signal to the PBX, and the transmission side communication apparatus codes a DTMF signal in a specified form and transmits the DTMF signal and the reception side communication apparatus decodes the coded DTMF signal and, on the basis of this content information, restores the DTMF signal in a DTMF signal generating portion.
    Type: Application
    Filed: February 23, 2004
    Publication date: August 19, 2004
    Applicant: HITACHI TELECOM TECHNOLOGIES, LTD.
    Inventors: Shinya Suzuki, Kimitoshi Takeuchi, Toru Yoshihara, Makoto Oohashi
  • DTMF signal transmission method and communication apparatus
    Publication number: 20040160965
    Abstract: A communication apparatus connected to a PBX and an ATM network is provided with a DTMF signal detecting portion for detecting whether or not a DTMF signal is contained in a voice signal from the PBX, a DTMF signal monitoring portion, a DTMF cell generating portion for coding and sending out a DTMF signal, a DTMF cell decomposing portion for decoding a coded DTMF signal and a DTMF signal generating portion for generating a DTMF signal on the basis of the information content of a decoded DTMF signal and sending out this DTMF signal to the PBX, and the transmission side communication apparatus codes a DTMF signal in a specified form and transmits the DTMF signal and the reception side communication apparatus decodes the coded DTMF signal and, on the basis of this content information, restores the DTMF signal in a DTMF signal generating portion.
    Type: Application
    Filed: February 23, 2004
    Publication date: August 19, 2004
    Applicant: HITACHI TELECOM TECHNOLOGIES, LTD.
    Inventors: Shinya Suzuki, Kimitoshi Takeuchi, Toru Yoshihara, Makoto Oohashi
  • DTMF signal transmission method and communication apparatus
    Publication number: 20040160966
    Abstract: A communication apparatus connected to a PBX and an ATM network is provided with a DTMF signal detecting portion for detecting whether or not a DTMF signal is contained in a voice signal from the PBX, a DTMF signal monitoring portion, a DTMF cell generating portion for coding and sending out a DTMF signal, a DTMF cell decomposing portion for decoding a coded DTMF signal and a DTMF signal generating portion for generating a DTMF signal on the basis of the information content of a decoded DTMF signal and sending out this DTMF signal to the PBX, and the transmission side communication apparatus codes a DTMF signal in a specified form and transmits the DTMF signal and the reception side communication apparatus decodes the coded DTMF signal and, on the basis of this content information, restores the DTMF signal in a DTMF signal generating portion.
    Type: Application
    Filed: February 23, 2004
    Publication date: August 19, 2004
    Applicant: HITACHI TELECOM TECHNOLOGIES, LTD.
    Inventors: Shinya Suzuki, Kimitoshi Takeuchi, Toru Yoshihara, Makoto Oohashi
  • System for transmitting DTMF signal and communication equipment thereof
    Patent number: 6700973
    Abstract: A communication apparatus 1 or 2 connected to a PBX 4 or 5 and an ATM network 3, is provided with a DTMF signal detecting portion 102 for detecting whether or not a DTMF signal is contained in a voice signal from the PBX 4 or 5, a DTMF signal monitoring portion 103, a DTMF cell generating portion 105 for coding and sending out a DTMF signal, a DTMF cell decomposing portion 110 for decoding a coded DTMF signal and a DTMF signal generating portion 113 for generating a DTMF signal on the basis of the information content of a decoded DTMF signal and sending out this DTMF signal to the PBX 4 or 5, and the transmission side communication apparatus 1 or 2 codes a DTMF signal in a specified form and transmits the DTMF signal and the reception side communication apparatus 1 or 2 decodes the coded DTMF signal and, on the basis of this content information, restores the DTMF signal in a DTMF signal generating portion 113.
    Type: Grant
    Filed: September 14, 1999
    Date of Patent: March 2, 2004
    Assignee: Hitachi Telecom Technologies, Ltd.
    Inventors: Shinya Suzuki, Kimitoshi Takeuchi, Toru Yoshihara, Makoto Oohashi