Patents by Inventor Kazunori Ozawa

Kazunori Ozawa 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: 8649371
    Abstract: A gateway apparatus 110 includes: a communication unit 111 communicating a frame signal conforming to an IuUP (Iu User Plane) protocol with a wireless base station controller connected to a circuit switching network 101; a determination unit 112 for determining whether the frame signal received by the communication unit indicates a time alignment request for a sound signal to a circuit switching network or not; a conversion unit 113, converting information included in the frame signal to information to be set in a call control signal of an IMS (IP Multimedia Subsystem) when the frame signal indicates a time alignment request; and a call control signal transmission unit 114 transmitting the call control signal including the converted information to a communication apparatus in the IMS 102.
    Type: Grant
    Filed: February 10, 2009
    Date of Patent: February 11, 2014
    Assignee: NEC Corporation
    Inventor: Kazunori Ozawa
  • Publication number: 20140032702
    Abstract: A control apparatus calculates an access frequency for a content item stored in each of a plurality of cache servers temporarily holding the content item based on a number of accesses to the content item, determines an arrangement of content items to the plurality of cache servers using at least one of load status of the plurality of cache servers, topology information of the mobile network, location information of a terminal requesting a content item, and the access frequency, instructs the plurality of cache servers to hold a content item according to the determined arrangement, and, upon reception of a request for a content item from a terminal, instructs a cache server holding the requested content item among the plurality of cache servers to send the requested content item via a packet forwarding apparatus.
    Type: Application
    Filed: April 20, 2012
    Publication date: January 30, 2014
    Applicant: Nec Corporation
    Inventor: Kazunori Ozawa
  • Patent number: 8617257
    Abstract: There is provided a simple-structured and inexpensive device for stacking a successive separator and sheet electrodes which can protect an end portion of a sheet electrode when folding the successive separator, and which enables smooth folding of the separator to improve the productivity. The device comprises a stacking stage 10 which adsorbs and holds a leading end of the tape-like separator S, and on which sheet electrodes P, N and the separator S are successively stacked, separator reciprocating means for reciprocating the tape-like separator S on the stacking stage 10 with the stacking stage 10 being as a center, and a folding guide member 20 which comes close/moves apart relative to the stacking stage 10, covers both side ends of the stacked sheet electrode P, N in the moving direction of the separator S, and guides folding of the separator S accompanied by a reciprocal movement of the separator S at both side ends of the sheet electrode.
    Type: Grant
    Filed: May 2, 2007
    Date of Patent: December 31, 2013
    Assignee: Enax, Inc.
    Inventors: Munehiro Kadowaki, Kiyoko Abe, Kazunori Ozawa
  • Patent number: 8588379
    Abstract: At one of the timings: during a period between the moment when one of terminals which performs transmission calls out a communication partner and the moment of response and at the timing after the communication between the terminals is complete; content data is read out from a database and the read out content data is transmitted to the terminal.
    Type: Grant
    Filed: June 19, 2008
    Date of Patent: November 19, 2013
    Assignee: NEC Corporation
    Inventors: Kazuhiro Koyama, Kazunori Ozawa
  • Patent number: 8564639
    Abstract: At one of the timings: during a period between the moment when one of terminals which performs transmission calls out a communication partner and the moment of response and at the timing after the communication between the terminals is complete; content data is read out from a database and the read out content data is converted according to conversion information based on reproduction at the terminal. The converted content data is transmitted to the terminal.
    Type: Grant
    Filed: June 19, 2008
    Date of Patent: October 22, 2013
    Assignee: NEC Corporation
    Inventors: Kazuhiro Koyama, Kazunori Ozawa
  • Publication number: 20130242741
    Abstract: A gateway apparatus transmits and receives control signal indicative of whether bit rates of voice transmitted and received by mobile terminal connected to packet forwarding apparatus on mobile high-speed network can be changed when congestion is detected in mobile high-speed network and of notification scheme of changed bit rate. When congestion is detected on mobile high-speed network and bit rate of voice transmitted or received by the mobile terminal has been changed, the gateway apparatus converts voice compressed-and-encoded bit stream stored in packet supplied from packet forwarding apparatus from the changed bit rate into bit rate transmittable and receivable by a mobile terminal connected to radio network controller on mobile circuit-switched network and transmits the converted compressed-and-encoded bit stream to radio network controller.
    Type: Application
    Filed: December 7, 2011
    Publication date: September 19, 2013
    Applicant: NEC CORPORATION
    Inventor: Kazunori Ozawa
  • Patent number: 8509460
    Abstract: A sound mixing apparatus includes mixing processing units 11 to 1k provided according to sampling frequencies and speaker detector 400 that selects at least one speaker sound signal out of plural sound signals inputted to mixing processing units 11 to 1k. Each of mixing processing units 11 to 1k adds up speaker sound signals having the same sampling frequency selected by speaker detector 400 to generate a first added-up sound signal, converts the sampling frequency of the first added-up sound signal into a sampling frequency processable by the other mixing processing units, and further adds up the first added-up sound signal and the first added-up sound signal converted into a sampling frequency processable by the processing unit and supplied from the other mixing processing units.
    Type: Grant
    Filed: January 28, 2009
    Date of Patent: August 13, 2013
    Assignee: NEC Corporation
    Inventors: Hironori Ito, Kazunori Ozawa
  • Patent number: 8503538
    Abstract: There are provided a system, an apparatus, and a method for suppressing increase in an amount of distribution data when performing content distribution via a network, improving reliability of the data received by a receiver in the distribution through an unstable transmission path such as a wireless transmission path, enabling provision of the content with a stable quality, and realizing the provision of the content with an optimal quality for the reception environment of content receiver, while suppressing an increase in an amount of processing for improving reliability of the distribution data on both of reception side and a transmission side.
    Type: Grant
    Filed: January 24, 2005
    Date of Patent: August 6, 2013
    Assignee: NEC Corporation
    Inventors: Hiroaki Dei, Daisuke Mizuno, Kazunori Ozawa
  • Patent number: 8489216
    Abstract: A sound mixing apparatus includes mixing processing units 11 to 1k provided according to sampling frequencies. Each of mixing processing units 11 to 1k adds up input sound signals of the same sampling frequency to generate a first added-up sound signal, converts the sampling frequency of the first added-up sound signal into a sampling frequency processable by the other mixing processing units, and supplies sound signals that are converted to the sampling frequency, to the other mixing processing units, adds up, to generate a second added-up sound signal, the first added-up sound signal generated by itself and the first added-up sound signals that are converted to a sampling frequency processable by itself and that are supplied from the other mixing processing units.
    Type: Grant
    Filed: January 28, 2009
    Date of Patent: July 16, 2013
    Assignee: NEC Corporation
    Inventors: Hironori Ito, Kazunori Ozawa
  • Publication number: 20130174203
    Abstract: A server apparatus includes: a compression and encoding unit that compresses and encodes screen information or image information downloaded from a Web serve on the Internet in response to an instruction from a mobile terminal; a packet transmission unit that stores an output signal from the compression and encoding unit into a packet and transmits the packet to the mobile terminal via a packet forwarding apparatus(es); and a video image quality measurement unit that measures video image quality by referring to an input signal to the compression and encoding unit, a signal decoded from the output signal of the compression and encoding unit, a transmission timing of the packets, and a timing at which the mobile terminal receives the packet.
    Type: Application
    Filed: August 26, 2011
    Publication date: July 4, 2013
    Applicant: NEC CORPORATION
    Inventor: Kazunori Ozawa
  • Patent number: 8477918
    Abstract: At one of the timings: during a period between the moment when one of terminals which performs transmission calls out a communication partner and the moment of response and at the timing after the communication between the terminals is complete; a server reads out content data from a database, converts the read out content data according to the conversion information based on reproduction at the terminal, and transmits the converted content data to the terminal. At this timing, the terminal reproduces the content data transmitted from the server.
    Type: Grant
    Filed: June 19, 2008
    Date of Patent: July 2, 2013
    Assignee: NEC Corporation
    Inventors: Kazunori Ozawa, Kazuhiro Koyama
  • Publication number: 20130110918
    Abstract: A thin client system includes: first thin client server that includes first virtual client unit connected to mobile terminal via packet forwarding apparatus, and first storage unit storing user data received from mobile terminal via first virtual client unit; second thin client server that includes second virtual client unit connected to mobile terminal via packet forwarding apparatus, and second storage unit storing user data received from mobile terminal via second virtual client unit; and management server that, when destination of connection of mobile terminal is changed from first virtual client unit to second virtual client unit, reads out user data of mobile terminal from first storage unit, based on position information of mobile terminal, and writes read-out user data in second storage unit.
    Type: Application
    Filed: July 5, 2011
    Publication date: May 2, 2013
    Applicant: NEC CORPORATION
    Inventor: Kazunori Ozawa
  • Patent number: 8428939
    Abstract: A voice mixing device for mixing a plurality of voice signals, comprises: a speaker selection unit selecting at least one voice signal among said plurality of voice signals; a full signal adder unit adding all of at least one voice signal selected by said speaker selection unit; respective subtractor unit subtracting only one of said selected voice signals from an addition result of said full signal adder unit; a common noise suppression unit suppressing noise of a common voice signal, being an addition result of said full signal adder unit; individual noise suppression unit suppressing noise of respective individual voice signals, being subtraction results of said subtractor unit; and memory switching unit copying information of noise suppression obtained in said common noise suppression unit based on a selection result of said speaker selection unit, to information of noise suppression in said individual noise suppression unit.
    Type: Grant
    Filed: July 28, 2008
    Date of Patent: April 23, 2013
    Assignee: NEC Corporation
    Inventors: Hironori Ito, Kazunori Ozawa
  • Patent number: 8423593
    Abstract: A contents distribution system distributes contents to the reproduction terminals (103). A contents distribution system comprises a first contents distribution server (101) and one or more contents storage servers (102). This system makes it possible that the CM contents recorded in each of CM distribution servers (101) is distributed to multiple CM storage servers (102) and the multiple CM storage servers (102) distribute the CM contents to the reproduction terminals (103). Using multiple CM storage servers (102), the processing load of CM distribution can be shared. Compared with the case in which the CM distribution server (101) directly distributes CM to the reproduction terminals (103), the processing load of each of CM distribution servers (101) can be reduced.
    Type: Grant
    Filed: August 25, 2009
    Date of Patent: April 16, 2013
    Assignee: NEC Corporation
    Inventors: Ryota Takeshima, Kazunori Ozawa
  • Publication number: 20130085750
    Abstract: A server apparatus acquires content based on instruction information; decodes image data of the acquired content compression encodes captured image data using a predetermined encoding scheme; decodes an audio signal and compression encodes the decoded audio signal using the predetermined encoding scheme, stores the image and the audio signal and sends the packet to a packet forwarding apparatus. A mobile terminal receives the packet, decodes and displays the compression encoded image data stored in the packet; and decodes and reproduces the compression encoded audio signal.
    Type: Application
    Filed: May 31, 2011
    Publication date: April 4, 2013
    Applicant: NEC CORPORATION
    Inventor: Kazunori Ozawa
  • Publication number: 20130058213
    Abstract: A server device includes: a storage unit that, upon receiving content storage instruction information from a mobile terminal via a packet forwarding device in a mobile network and a content stream or content file, stores the content stream or content file; a virtual client unit that, upon receiving content reproduction instruction information from the mobile terminal, reads, decodes and reproduces a content stream or content file stored in the storage unit to generate display screen data; and an encoder unit that transmits an encoding result obtained by compression-encoding part or all of the display screen data as a packet to the packet forwarding device.
    Type: Application
    Filed: May 9, 2011
    Publication date: March 7, 2013
    Applicant: NEC CORPORATION
    Inventor: Kazunori Ozawa
  • Publication number: 20130049737
    Abstract: An electric current detection circuit for detecting an electric current flowing to a load includes a voltage generation circuit, a plurality of comparators, and a reference voltage shift circuit. The voltage generation circuit includes a plurality of resistors coupled in series and generates different voltages by dividing a reference voltage with the resistors. The comparators determine a current level of the electric current flowing to the load using the voltages generated by the voltage generation circuit as threshold values. The reference voltage shift circuit shifts the reference voltage. The electric current flowing to the load is detected based on the current level determined by the plurality of comparators before shifting the reference voltage and the current level determined by the plurality of comparators after shifting the reference voltage.
    Type: Application
    Filed: August 7, 2012
    Publication date: February 28, 2013
    Applicant: ANDEN CO., LTD.
    Inventors: Takeshi HATTORI, Kazunori OZAWA, Fukuo ISHIKAWA, Nobutomo TAKAGI
  • Publication number: 20130041943
    Abstract: A distribution system includes: a plurality of cache servers that are connected to at least one of a plurality of packet forwarding devices forwarding a packet supplied from a content distribution server and temporarily hold a content; and a distribution control device that stores a content map representing a content held by the each of the plurality of cache servers, extracts, when receiving a request for a content from a terminal, a cache server near the terminal from among the plurality of cache servers based on information about an area in which the terminal exists, and instructs the extracted cache server to transmit the content requested by the terminal.
    Type: Application
    Filed: April 19, 2011
    Publication date: February 14, 2013
    Applicant: NEC CORPORATION
    Inventor: Kazunori Ozawa
  • Publication number: 20130039177
    Abstract: A server device includes: a virtual client unit that causes an application program to generate screen data, based on instruction information from a mobile terminal received via a packet forwarding device in a mobile network; an encoder unit that compression-encodes an entirety or a portion of the screen data and transmits to the packet forwarding device a packet including the encoded result; and a rate control unit that measures response times of a series of response signals received from the mobile terminal with respect to the transmitted packet, and controls, based on the measurement result, at least one of a bit rate and a frame rate of the compression-encoding performed by the encoder unit.
    Type: Application
    Filed: May 9, 2011
    Publication date: February 14, 2013
    Applicant: NEC CORPORATION
    Inventor: Kazunori Ozawa
  • Patent number: 8327209
    Abstract: A sound data decoding apparatus based on a waveform coding method includes a loss detector, sound data decoder, sound data analyzer, parameter modifying section and sound synthesizing section. The loss detector detects whether a loss exists in a sound data. The sound data decoder decodes the sound data to generate a first decoded sound signal. The sound data analyzer extracts a first parameter from the first decoded sound signal. The parameter modifying section modifies the first parameter based on a result of the detection of loss. The sound synthesizing section generates a first synthesized sound signal by using the modified first parameter. Thus, a deterioration of sound quality is prevented in the error compensation of sound data.
    Type: Grant
    Filed: July 23, 2007
    Date of Patent: December 4, 2012
    Assignee: NEC Corporation
    Inventors: Hironori Ito, Kazunori Ozawa