公开(公告)号：US09614883B2

公开(公告)日：2017-04-04

申请号：US14030734

申请日：2013-09-18

Applicant: CANON KABUSHIKI KAISHA

Inventor： Julien Sevin ,  Pascal Lagrange

IPC: G06F15/16 ,  H04L29/06 ,  H04L1/08 ,  H04L1/00 ,  H04L1/18

CPC classification number: H04L65/60 ,  H04L1/0067 ,  H04L1/08 ,  H04L1/1887

Abstract: The present invention concerns a method and a device of transmitting uncompressed video streams. In particular, the method concerns the adaptation of a wireless transmission to bandwidth reduction and packet loss.There is provided a computer implemented method for sending uncompressed video data, wherein the video data comprises binary video components, the method comprising generating a plurality of SB packets from a group of video components, each SB packet being constituted by bits of the video components grouped according to their significance; determining available bandwidth for transmission and sending the most SB packets to fit the available bandwidth, beginning by the most significant ones, meaning containing the most significant bits of the video components. Accordingly, the best possible quality is obtained according to the available bandwidth.

公开(公告)号：US10135690B2

公开(公告)日：2018-11-20

申请号：US14534101

申请日：2014-11-05

Applicant: CANON KABUSHIKI KAISHA

Inventor： Pascal Lagrange ,  Julien Sevin

IPC: H04L12/24 ,  H04W8/00 ,  H04L12/26 ,  H04W48/12

Abstract: There is provided methods for node discovery in a network comprising the following steps: performing a first discovery process for discovering at least one first node of said network, using at least one first wireless communication parameter, adapting said at least one first wireless communication parameter, thereby obtaining at least one second wireless communication parameter coordinated with wireless communication parameters of nodes of at least one group of nodes discovered during the first discovery process, and performing a second discovery process for discovering at least one second node of said network, using said at least one second wireless communication parameter. Embodiments of the invention provide better coordination during node discovery thereby making the node discovery is thus made faster and reducing interferences between the nodes.

公开(公告)号：US09071768B2

公开(公告)日：2015-06-30

申请号：US13717236

申请日：2012-12-17

Applicant: CANON KABUSHIKI KAISHA

Inventor： Pascal Lagrange ,  Julien Sevin

IPC: H04N21/63 ,  H04N19/00 ,  H04N19/66

CPC classification number: H04N19/587 ,  H04N19/66 ,  H04N21/631

Abstract: The present invention a method of transmitting video information over a communication link made of several transmission paths between wireless transmitting and receiving stations. The method comprises, in the wireless transmitting station, obtaining an uncompressed video frame made of an array of pixel blocks, a pixel in the pixel blocks being represented by base pixel information and enhancement pixel information; generating at least one set of complementary pixel blocks from a given pixel block of the obtained uncompressed video frame, by applying different operations to said given pixel block for dropping different enhancement pixel information from that pixel block, so that the complementary pixel blocks comprise different enhancement pixel information and each comprises the base pixel information; and for each set, transmitting the complementary pixel blocks over respective different transmission paths to the wireless receiving station. This provides robustness of video transmission while keeping a high quality of video rendering.

Abstract translation: 本发明是一种通过无线发射台和接收台之间的若干传输路径制成的通信链路传输视频信息的方法。 该方法包括：在无线发送站中，获取由像素块阵列构成的未压缩视频帧，由基本像素信息和增强像素信息表示像素块中的像素; 通过对所述给定像素块应用不同的操作从所述像素块中丢弃不同的增强像素信息，从所获得的未压缩视频帧的给定像素块中产生至少一组互补像素块，使得所述互补像素块包括不同的增强 像素信息，并且每个包括基本像素信息; 并且对于每个集合，将各个不同传输路径上的互补像素块发送到无线接收站。 这提供了视频传输的鲁棒性，同时保持高质量的视频呈现。

公开(公告)号：US12244419B2

公开(公告)日：2025-03-04

申请号：US17926092

申请日：2021-05-18

Applicant: CANON KABUSHIKI KAISHA

Inventor： Philippe Le Bars ,  Pascal Lagrange ,  Pierre Visa

IPC: H04L1/00 ,  H04L47/34

Abstract: There is provided a method of wireless transmission of protocol data units over one or more radio link modules, the method comprising: splitting a service data unit, received from an upper layer, into a plurality of data packets; obtaining combined data packets, by applying a Network Coding to the data packets, wherein padding is added, if necessary, to the service data unit or to data packets to have data packets of equal length to which is applied the Network Coding; encapsulating the combined data packets into at least one protocol data unit, wherein each protocol data unit comprises a header and wherein the header contains a padding indication for indicating whether padding has been added or not, and transmitting the at least one protocol data unit over the one or more radio link modules.

公开(公告)号：US11509490B2

公开(公告)日：2022-11-22

申请号：US16865103

申请日：2020-05-01

Applicant: CANON KABUSHIKI KAISHA

Inventor： Pascal Lagrange

IPC: H04L12/10 ,  H04L5/00 ,  H04L12/40 ,  H04W12/50

Abstract: There are provided methods for associating an adapter controller with a device, among a plurality of devices, for instance a Power over Ethernet device or its controller, each device of the plurality being connected to a controller interconnected to other controllers by a power-over-data linear bus to which an item of power source equipment is also connected. The methods comprises an exchange of a pairing message comprising a unique identifier of the device to be paired with, wherein only said device from which is the pairing message receives power at the time of receiving the pairing message by the controller among the plurality of devices.

公开(公告)号：US20190199538A1

公开(公告)日：2019-06-27

申请号：US16213168

申请日：2018-12-07

Applicant: CANON KABUSHIKI KAISHA

Inventor： Pascal Lagrange ,  Hervé Merlet

IPC: H04L12/12 ,  H04N7/18 ,  H04N17/00 ,  H04N5/232

CPC classification number: H04L12/12 ,  G06F1/24 ,  H04L12/10 ,  H04N5/23241 ,  H04N5/268 ,  H04N7/181 ,  H04N17/002

Abstract: A method for resetting at least one processing device in a power-over-data linear bus interconnecting a plurality of processing devices, the method including, at a first processing device of said plurality of processing devices: sending a protocol data unit comprising a prior-reset notification to all other processing devices of the plurality of processing devices, and sending a physical reset signal to all other processing devices of the plurality of processing devices, wherein the prior-reset notification is configured to prevent a processing device that receives the physical reset signal from resetting, if the protocol data unit comprising the prior-reset notification has been previously processed by the processing device.

公开(公告)号：US09686516B2

公开(公告)日：2017-06-20

申请号：US13828749

申请日：2013-03-14

Applicant: CANON KABUSHIKI KAISHA

Inventor： Lionel Tocze ,  Pierre Visa ,  Pascal Lagrange

IPC: H04N9/31 ,  H04N9/12 ,  G01S1/00 ,  H04W84/20

CPC classification number: H04N9/31 ,  G01S1/00 ,  H04N9/12 ,  H04N9/3147 ,  H04W84/20

Abstract: The present invention relates to improving configuration of wireless communication paths between devices in a video projection system comprising multiple wireless video projectors. When an initial radio communication setup is required between a managing node, e.g. a node comprising a master projector, and a node comprising a slave projector, for example following the powering up of the video projection system, the slave node receives setup information by radio communication means according to a sweeping sequence and transmits information by projecting sub-images. Sub-images advantageously comprise information relative to settings of the master node allowing reception in the corresponding slave node of a radio signal transmitted by the master node.