Patents by Inventor Kazumichi SATO
Kazumichi SATO 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: 10681416Abstract: A quality-of-experience optimization system configured to optimize quality (QoE: Quality of Experience) that a user experiences in a content distribution service, including: a recommend request apparatus configured to output a distribution parameter candidate of content distribution for optimizing QoE of content distribution, and to receive a distribution parameter for optimizing the QoE as a recommend value; and a quality-of-experience optimization apparatus configured to estimate QoE from the distribution parameter candidate received from the recommend request apparatus, and to calculate a distribution parameter for optimizing the QoE as a recommend value to output the recommend value.Type: GrantFiled: December 24, 2015Date of Patent: June 9, 2020Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Hiroshi Yamamoto, Kazumichi Sato, Taichi Kawano, Kei Takeshita
-
Patent number: 10608981Abstract: A name identification device includes a generation unit configured to generate graph information in which each node represents one of names and IP addresses included in A records and CNAME records included in a DNS response observed in a network, and each edge represents a correspondence relationship between one and another of the names and the IP addresses in the A records and the CNAME records, and to associate the generated graph information with a client corresponding to the DNS response; and an identifying unit configured to identify a name related to a leaf node that is reachable from a node corresponding to the IP address of a server by tracing the edges in the graph information having been associated with the client, for a packet between the client and the server that is observed in the network.Type: GrantFiled: February 16, 2016Date of Patent: March 31, 2020Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Takeru Inoue, Keisuke Ishibashi, Akihiro Shimoda, Kazumichi Sato, Tatsuya Mori, Shigeki Goto
-
Publication number: 20200037636Abstract: The present invention provides means for reducing the culture medium odor of a beverage resulting from lactic acid bacteria while maintaining the clean sensation of the beverage, for a beverage containing a lactic acid bacterium powder and a high-intensity sweetener. The beverage according to the present invention contains a lactic acid bacterium powder, a high-intensity sweetener, 10 to 5000 ppb of nootkatone and 2.5 to 2000 ppb of linalool. It is preferable that the mass ratio of linalool and nootkatone be nootkatone/linalool=1 to 1000.Type: ApplicationFiled: March 15, 2017Publication date: February 6, 2020Applicants: Asahi Soft Drinks Co., Ltd., Asahi Group Holdings, Ltd.Inventors: Keiichi MATSUURA, Kazumichi SATO
-
Patent number: 10511500Abstract: An estimation device is provided that measures a number of DNS requests for each of a plurality of domain names and for each IP address in observed flows. The device measures a total number of the flows, and total amounts of data, estimates a relationship between the amount of data for each IP address corresponding to a node, and the number of DNS requests for each domain name corresponding to a non-intermediate node; and based on a value obtained by multiplying the number of requests for each domain name by the amount of data for each flow of each domain name, obtains the amount of data for each flow of each domain name, multiplies the amount of data by the number of the DNS requests for each domain name, so as to calculate an estimate of the amount of data for each domain name.Type: GrantFiled: February 16, 2016Date of Patent: December 17, 2019Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Akihiro Shimoda, Keisuke Ishibashi, Takeru Inoue, Kazumichi Sato, Tatsuya Mori, Shigeki Goto
-
Patent number: 10499266Abstract: A communication-speed-limited user extraction apparatus for extracting a user whose communication speed is limited based on communication histories includes a communication history storage unit configured to store the communication histories including throughput information on a user-by-user basis; and a communication-speed-limited user determination unit configured to extract a communication history with a same communication environment at a communication date and time within a predetermined period of time from the communication history storage unit and determine that a user with a different throughput distribution is the user whose communication speed is limited.Type: GrantFiled: April 19, 2016Date of Patent: December 3, 2019Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Kei Takeshita, Hiroshi Yamamoto, Kazumichi Sato, Taichi Kawano
-
Patent number: 10491903Abstract: A delivery rate selection device, for selecting a delivery rate when delivering a video image from a video delivery server to a client in a video delivery service. When a delivery rate calculating unit receives from an inquiry source an inquiry of delivery rate for delivering a video image to a given user, a delivery rate calculating unit acquires presence or absence of a playback stall tolerance and presence or absence of an image quality deterioration tolerance of the given user from the user characteristic storage unit, selects an encoding rate from a plurality of encoding rates of the video image according to a combination of the presence or absence of a playback stall tolerance and the presence or absence of an image quality deterioration tolerance of the given user, and returns the selected encoding rate as the delivery rate to the inquiry source.Type: GrantFiled: June 9, 2016Date of Patent: November 26, 2019Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Takuto Kimura, Masahiro Yokota, Ken Nishimatsu, Hiroshi Yamamoto, Kei Takeshita, Kazumichi Sato, Taichi Kawano
-
Patent number: 10412182Abstract: A communication speed estimation apparatus configured: to generate communication log information representing history of communication executed by a user, and store the communication log information in a communication history information storage unit; to calculate, based on the stored communication log information, throughput result information for each of a server, a network, and a user terminal that were used for the communication for each time slot, and store the calculated throughput result information in a quality information storage unit; and, when the user performs new communication, in advance, to read out corresponding throughput result information from the quality information storage unit based on at least one of a terminal, a server, and a network that the user intends to use, and a time slot including a time when the user intends to perform communication, and to estimate a communication speed in the new communication based on the read-out throughput result information.Type: GrantFiled: December 17, 2015Date of Patent: September 10, 2019Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Kei Takeshita, Hiroshi Yamamoto, Kazumichi Sato, Taichi Kawano
-
Patent number: 10397625Abstract: A moving-image parameter selection device includes a storage unit configured, for each distribution of a video in a past, to associate a combination of values of moving-image parameters used for the distribution, with a KPI related to the distribution, to store the associated combination; and a selector configured, for each of the combinations, to calculate an average of the KPI, to execute a significance test for each of the averages of the KPIs with respect to one of the averages of the KPIs of the combinations, and based on results of the significance tests, to select a part of combinations among the combinations, and thereby, enables selection of moving-image parameters that contribute to increasing the profit of a video distribution service.Type: GrantFiled: April 8, 2016Date of Patent: August 27, 2019Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Taichi Kawano, Hiroshi Yamamoto, Kei Takeshita, Kazumichi Sato
-
Patent number: 10154266Abstract: A video quality estimation apparatus used for an encoded video, to estimate a video quality value being a value quantifying a video quality being quality of the video felt by a user when viewing and listening to the video. The apparatus includes a maximum value calculator to calculate a maximum value of the video quality value from a resolution of the video and a frame rate of the video, and a video quality calculator to calculate an estimated video quality value corresponding to an encoding bit rate having been input, based on a predetermined relationship between the encoding bit rate of the video and the video quality value. The predetermined relationship is a relationship in which the video quality value increases while the encoding bit rate increases, and the video quality value converges on the maximum value calculated by the maximum value calculator.Type: GrantFiled: November 16, 2015Date of Patent: December 11, 2018Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Taichi Kawano, Hiroshi Yamamoto, Kei Takeshita, Kazumichi Sato
-
Publication number: 20180220178Abstract: A moving-image parameter selection device includes a storage unit configured, for each distribution of a video in a past, to associate a combination of values of moving-image parameters used for the distribution, with a KPI related to the distribution, to store the associated combination; and a selector configured, for each of the combinations, to calculate an average of the KPI, to execute a significance test for each of the averages of the KPIs with respect to one of the averages of the KPIs of the combinations, and based on results of the significance tests, to select a part of combinations among the combinations, and thereby, enables selection of moving-image parameters that contribute to increasing the profit of a video distribution service.Type: ApplicationFiled: April 8, 2016Publication date: August 2, 2018Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Taichi KAWANO, Hiroshi YAMAMOTO, Kei TAKESHITA, Kazumichi SATO
-
Publication number: 20180213234Abstract: A delivery rate selection device, for selecting a delivery rate when delivering a video image from a video delivery server to a client in a video delivery service. When a delivery rate calculating unit receives from an inquiry source an inquiry of delivery rate for delivering a video image to a given user, a delivery rate calculating unit acquires presence or absence of a playback stall tolerance and presence or absence of an image quality deterioration tolerance of the given user from the user characteristic storage unit, selects an encoding rate from a plurality of encoding rates of the video image according to a combination of the presence or absence of a playback stall tolerance and the presence or absence of an image quality deterioration tolerance of the given user, and returns the selected encoding rate as the delivery rate to the inquiry source.Type: ApplicationFiled: June 9, 2016Publication date: July 26, 2018Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Takuto KIMURA, Masahiro YOKOTA, Ken NISHIMATSU, Hiroshi YAMAMOTO, Kei TAKESHITA, Kazumichi SATO, Taichi KAWANO
-
Publication number: 20180189654Abstract: A data prediction device includes a predictor configured, among a plurality of data prediction schemes each of which has an application condition and a priority, among the data prediction schemes each of which has the application condition satisfied by a set of past observation data, to use a first data prediction scheme having a highest priority, so as to calculate a predicted value of next observation data, based on the set of the observation data; an accuracy calculator configured, in response to receiving the next observation data as input, to compare the predicted value with the observation data, so as to calculate precision of the first data prediction scheme; and a changer configured to change the priority of the first data prediction scheme, based on the precision calculated by the accuracy calculator; and thereby, enables selection of a scheme that makes the prediction accuracy higher among the data prediction schemes.Type: ApplicationFiled: May 27, 2016Publication date: July 5, 2018Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Kazumichi SATO, Hiroshi YAMAMOTO, Taichi KAWANO, Kei TAKESHITA
-
Publication number: 20180176804Abstract: A communication-speed-limited user extraction apparatus for extracting a user whose communication speed is limited based on communication histories includes a communication history storage unit configured to store the communication histories including throughput information on a user-by-user basis; and a communication-speed-limited user determination unit configured to extract a communication history with a same communication environment at a communication date and time within a predetermined period of time from the communication history storage unit and determine that a user with a different throughput distribution is the user whose communication speed is limited.Type: ApplicationFiled: April 19, 2016Publication date: June 21, 2018Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Kei TAKESHITA, Hiroshi YAMAMOTO, Kazumichi SATO, Taichi KAWANO
-
Publication number: 20180048620Abstract: A name identification device includes a generation unit configured to generate graph information in which each node represents one of names and IP addresses included in A records and CNAME records included in a DNS response observed in a network, and each edge represents a correspondence relationship between one and another of the names and the IP addresses in the A records and the CNAME records, and to associate the generated graph information with a client corresponding to the DNS response; and an identifying unit configured to identify a name related to a leaf node that is reachable from a node corresponding to the IP address of a server by tracing the edges in the graph information having been associated with the client, for a packet between the client and the server that is observed in the network.Type: ApplicationFiled: February 16, 2016Publication date: February 15, 2018Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Takeru INOUE, Keisuke ISHIBASHI, Akihiro SHIMODA, Kazumichi SATO, Tatsuya MORI, Shigeki GOTO
-
Publication number: 20180026862Abstract: An estimation device measures a number of DNS requests for each domain name and for each IP address in observed flows, measures a total number of the flows, and total amounts of data; estimates a relationship between the amount of data for each IP address corresponding to a node, and the number of DNS requests for each domain name corresponding to a non-intermediate node; and based on a value obtained by multiplying the number of requests for each domain name by the amount of data for each flow of each domain name, obtains the amount of data for each flow of each domain name, and to multiply the amount of data by the number of the DNS requests for each domain name, so as to calculate an estimate of the amount of data for each domain name.Type: ApplicationFiled: February 16, 2016Publication date: January 25, 2018Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Akihiro SHIMODA, Keisuke ISHIBASHI, Takeru INOUE, Kazumichi SATO, Tatsuya MORI, Shigeki GOTO
-
Publication number: 20180027293Abstract: A quality-of-experience optimization system configured to optimize quality (QoE: Quality of Experience) that a user experiences in a content distribution service, including: a recommend request apparatus configured to output a distribution parameter candidate of content distribution for optimizing QoE of content distribution, and to receive a distribution parameter for optimizing the QoE as a recommend value; and a quality-of-experience optimization apparatus configured to estimate QoE from the distribution parameter candidate received from the recommend request apparatus, and to calculate a distribution parameter for optimizing the QoE as a recommend value to output the recommend value.Type: ApplicationFiled: December 24, 2015Publication date: January 25, 2018Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Hiroshi YAMAMOTO, Kazumichi SATO, Taichi KAWANO, Kei TAKESHITA
-
Publication number: 20170374167Abstract: A communication speed estimation apparatus configured: to generate communication log information representing history of communication executed by a user, and store the communication log information in a communication history information storage unit; to calculate, based on the stored communication log information, throughput result information for each of a server, a network, and a user terminal that were used for the communication for each time slot, and store the calculated throughput result information in a quality information storage unit; and, when the user performs new communication, in advance, to read out corresponding throughput result information from the quality information storage unit based on at least one of a terminal, a server, and a network that the user intends to use, and a time slot including a time when the user intends to perform communication, and to estimate a communication speed in the new communication based on the read-out throughput result information.Type: ApplicationFiled: December 17, 2015Publication date: December 28, 2017Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Kei TAKESHITA, Hiroshi YAMAMOTO, Kazumichi SATO, Taichi KAWANO
-
Publication number: 20170359582Abstract: A video quality estimation apparatus used for an encoded video, to estimate a video quality value being a value quantifying a video quality being quality of the video felt by a user when viewing and listening to the video. The apparatus includes a maximum value calculator to calculate a maximum value of the video quality value from a resolution of the video and a frame rate of the video, and a video quality calculator to calculate an estimated video quality value corresponding to an encoding bit rate having been input, based on a predetermined relationship between the encoding bit rate of the video and the video quality value. The predetermined relationship is a relationship in which the video quality value increases while the encoding bit rate increases, and the video quality value converges on the maximum value calculated by the maximum value calculator.Type: ApplicationFiled: November 16, 2015Publication date: December 14, 2017Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Taichi KAWANO, Hiroshi YAMAMOTO, Kei TAKESHITA, Kazumichi SATO