公开(公告)号：US20240275725A1

公开(公告)日：2024-08-15

申请号：US18569167

申请日：2021-07-01

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Toshihito FUJIWARA ,  Satoshi NARIKAWA ,  Hiroya ONO

IPC: H04L47/122 ,  H04L47/193

CPC classification number: H04L47/122 ,  H04L47/193

Abstract: An object of the present disclosure is to provide a communication path switching method for improving a throughput of TCP communication at the time of switching a communication path between a first communication path that is at least one of a low latency or high speed and a second communication path that is at least one of a high latency or low speed.
The communication path switching method according to the present disclosure is a communication path switching method for switching a communication path to a first communication path or a second communication path by using operation of a TCP accelerator in a communication path switching system including a terminal that performs TCP communication by switching a communication path between the first communication path that is at least one of a low latency or high speed and the second communication path that is at least one of a high latency or low speed, the communication path switching method including: receiving data from the terminal; and when the data is first received after the communication path is switched from the first communication path to the second communication path, transmitting again to the terminal, an acknowledgement signal transmitted last before the communication path is switched.

公开(公告)号：US20240121505A1

公开(公告)日：2024-04-11

申请号：US18276225

申请日：2021-02-18

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Hiroya ONO ,  Toshihito FUJIWARA ,  Tatsuya FUKUI

IPC: H04N23/66 ,  H04N5/262

CPC classification number: H04N23/66 ,  H04N5/2624

Abstract: An object of the present disclosure is to reduce a delay time from input of a plurality of videos to output of combined videos.
The present disclosure is a video combining device detecting a time deviation between a timing of a frame of each video and a predetermined timing when videos from a plurality of cameras are combined into one screen, giving an instruction for an imaging frame rate to the cameras such that the time deviation is reduced, and combining the videos from the plurality of cameras into one screen and outputting the combined videos.

公开(公告)号：US20230179531A1

公开(公告)日：2023-06-08

申请号：US17921078

申请日：2020-04-27

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Toshihito FUJIWARA ,  Hiroya ONO ,  Tomohiro TANIGUCHI

IPC: H04L47/263 ,  H04L67/10 ,  H04L1/00 ,  H04L43/0829 ,  H04L47/10 ,  H04N21/6405 ,  H04N21/24 ,  H04N21/238

CPC classification number: H04L47/263 ,  H04L67/10 ,  H04L1/004 ,  H04L43/0835 ,  H04L47/15 ,  H04N21/6405 ,  H04N21/2404 ,  H04N21/238

Abstract: The present disclosure aims to make it possible to transfer multicast packets at as high a rate as possible according to a state of a network, to perform high-quality and low-latency content distribution, and to perform stable multicast distribution on a network that is less likely to ensure a fixed available band such as a best-effort or wireless network.
The present disclosure is a content distribution system for converting part of communication for distribution into multicast communication, in which
a transmission-side edge server (UC/MC) applies Forward Error Correction to a multicast packet and transmits the multicast packet, a reception-side edge server (MC/UC) notifies the transmission-side edge server of information of packet loss of the received multicast packet, and
the transmission-side edge server (UC/MC) changes a transfer rate of a multicast packet to be transmitted based on the notified information of packet loss.

公开(公告)号：US20250133258A1

公开(公告)日：2025-04-24

申请号：US18681484

申请日：2021-08-11

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Toshihito FUJIWARA ,  Tatsuya FUKUI ,  Ryota SHIINA ,  Hiroya ONO

IPC: H04N21/431

Abstract: An object of the present disclosure is to reduce a time delay from inputting an asynchronous video to outputting the synthesized video.
The present disclosure relates to a device for synthesizing a plurality of video signals input asynchronously into a video signal displayed on one screen, in which, when input of an input frame is not completed for any one of the plurality of video signals, using data of a past input frame of the video signal instead of data whose input has not been completed, the video signal displayed on the one screen is synthesized.

公开(公告)号：US20250097493A1

公开(公告)日：2025-03-20

申请号：US18727399

申请日：2022-01-12

Applicant: Nippon Telegraph and Telephone Corporation

Inventor： Hiroya ONO ,  Tatsuya FUKUI ,  Toshihito FUJIWARA ,  Ryota SHIINA

IPC: H04N21/24

Abstract: Provided are a delay time measurement server, a delay time measurement method, and a program for calculating a video display delay time without arranging a special device on the client side. The delay time measurement server calculates a video transmission delay time from when a video signal obtained by encoding a specific video is transmitted toward a monitor until when a reaction signal for the specific video is received, as a video display delay time from when the video signal is transmitted toward the monitor until when the video is displayed on the monitor.

公开(公告)号：US20240283890A1

公开(公告)日：2024-08-22

申请号：US18681662

申请日：2021-08-11

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Toshihito FUJIWARA ,  Tatsuya FUKUI ,  Ryota SHIINA ,  Hiroya ONO

IPC: H04N5/66 ,  H04N5/12

CPC classification number: H04N5/66 ,  H04N5/12

Abstract: An object of the present disclosure is to reduce a delay in time from the video input of an asynchronous video to the output of a composite video.
The present disclosure is a device and a method, in which the device composes a plurality of video signals which have been input asynchronously into a video signal displayed on one screen, wherein the one screen is constituted by a plurality of sub-screens the number of which is greater than the plurality of video signals, and the plurality of video signals are arranged on a sub-screen out of the plurality of sub-screens such that an output delay of each video signal is reduced to compose the plurality of video signals.

公开(公告)号：US20240146633A1

公开(公告)日：2024-05-02

申请号：US18565466

申请日：2021-06-25

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Tatsuya FUKUI ,  Toshihito FUJIWARA ,  Ryota SHIINA ,  Hiroya ONO

IPC: H04L43/0864 ,  H04L65/1059 ,  H04L65/80

CPC classification number: H04L43/0864 ,  H04L65/1059 ,  H04L65/80

Abstract: An object of the present disclosure is to measure a delay time occurring in a device that receives or outputs a video or an audio without requiring a special apparatus or precise inter-apparatus time synchronization.
According to the present disclosure, there is provided a system including: a remote apparatus connected to a device that executes processing of outputting or receiving data of a video or an audio via a communication network; and a user terminal that transmits and receives a signal to and from the remote apparatus via the communication network, in which the system performs, in the device and the remote apparatus, processing of outputting or receiving a video or an audio having a predetermined pattern, detects, in the user terminal or the remote apparatus, outputting or receiving of the video or the audio having the pattern, and calculates a delay time in the device by setting a timing at which outputting or receiving of the video or the audio having the pattern is detected as a reference and using timings at which the device and the remote apparatus transmit the data of the video or the audio having the pattern via the communication network.

公开(公告)号：US20240119018A1

公开(公告)日：2024-04-11

申请号：US18276239

申请日：2021-02-18

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Tatsuya FUKUI ,  Toshihito FUJIWARA ,  Hiroya ONO ,  Ryota SHIINA ,  Tomohiko IKEDA

IPC: G06F13/36

CPC classification number: G06F13/36 ,  G06F2213/0042

Abstract: An object of the present disclosure is to enable data collection from a plurality of USB devices installed at remote locations.
The present disclosure is a USB transmission system including: a device-side transmitter/receiver configured to transmit/receive data to/from a USB device; and a host-side transmitter/receiver configured to transmit/receive data to/from a USB host, in which each of the device-side transmitter/receiver and the host-side transmitter/receiver includes a data transmission/reception unit configured to transmit/receive a packet of a USB protocol layer via a data network, and the host-side transmitter/receiver includes a hub configured to transfer data to be transmitted/received by the data transmission/reception unit included in the host-side transmitter/receiver to the USB host.

公开(公告)号：US20230178062A1

公开(公告)日：2023-06-08

申请号：US17925279

申请日：2020-05-21

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Satoshi NARIKAWA ,  Hiroya ONO

IPC: G10K11/178

CPC classification number: G10K11/17823 ,  G10K11/17873 ,  G10K2210/3027 ,  G10K2210/3044 ,  G10K2210/3046 ,  G10K2210/3056

Abstract: The present disclosure is a noise cancellation system including: a microphone that converts a sound wave into an electrical signal; a transmission line that propagates the electrical signal from the microphone; a speaker that reproduces a sound wave from the electrical signal from the transmission line; a phase inversion circuit that is provided between the microphone and the speaker, and inverses the phase of the electrical signal; a gain adjustment circuit that is provided between the microphone and the speaker, and adjusts a gain for amplifying the electrical signal; and a delay adjustment circuit that is provided between the microphone and the speaker, and adjusts the amount of delay of the electrical signal.

公开(公告)号：US20240163245A1

公开(公告)日：2024-05-16

申请号：US18282405

申请日：2021-04-08

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Tatsuya FUKUI ,  Toshihito FUJIWARA ,  Ryota SHIINA ,  Tomohiko IKEDA ,  Hiroya ONO

IPC: H04L61/00 ,  G06F3/14 ,  H04L9/40 ,  H04L49/35

CPC classification number: H04L61/35 ,  G06F3/14 ,  H04L49/35 ,  H04L63/08

Abstract: In order to solve the above problem, an object of the present invention is to provide a network system, a control method, a database, a controller, and a program capable of path construction in a device IF direct access network without disclosing connection information.
A network system according to the present invention (1) specifies and records a location on a network of a user and a device used by the user by using exchange of authentication data using a media signal of the device, and (2) when the user makes a connection request to content by using a user name, a controller solves location information on the network by using the user name, controls the network, and realizes connection between the content and the device.