专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

41. 发明申请

WO2021009004A1 LUMA TO CHROMA QUANTIZATION PARAMETER TABLE SIGNALING 审中-公开
公开(公告)号：WO2021009004A1
公开(公告)日：2021-01-21
申请号：PCT/EP2020/069407
申请日：2020-07-09
申请人： INTERDIGITAL VC HOLDINGS FRANCE, SAS
发明人： DE LAGRANGE, Philippe , FRANCOIS, Edouard , HIRON, Franck , CHEVANCE, Christophe
IPC分类号： H04N19/124 , H04N19/186 , H04N19/70
摘要： Compression technology comprises deriving chroma quantization parameter (Qpc) based on luma Qp using luma-to-chroma Qp mapping table. Such a table may be shared by the encoder and the decoder. However, in some cases, signaling such a table in the data stream instead of having it fixed by a standard may be advantageous. The syntax used to encode, signal and decode this table has a cost in terms of bitrate. The present principles propose to signaling of a luma-to-chroma mapping table in the data stream according to different embodiments.

42. 发明申请

WO2020260110A1 HMVC FOR AFFINE AND SBTMVP MOTION VECTOR PREDICITON MODES 审中-公开
公开(公告)号：WO2020260110A1
公开(公告)日：2020-12-30
申请号：PCT/EP2020/066850
申请日：2020-06-18
申请人： INTERDIGITAL VC HOLDINGS FRANCE, SAS
发明人： ROBERT, Antoine , LELEANNEC, Fabrice , POIRIER, Tangi , GALPIN, Franck
IPC分类号： H04N19/513 , H04N19/52
摘要： An apparatus for encoding or decoding blocks of a current picture encodes sub-blocks of a first block of a current picture. The sub-blocks encoded or decoded based on motion vectors determined according a motion information data associated with the first block. In a second step, a set of second motion information data is determined as a function of the first motion information data. These second motion information data are added to a list of motion information data, that is used to determine a motion information data for further blocks of the current picture to encode or decode.

43. 发明申请

WO2020254335A1 LOSSLESS MODE FOR VERSATILE VIDEO CODING 审中-公开
公开(公告)号：WO2020254335A1
公开(公告)日：2020-12-24
申请号：PCT/EP2020/066647
申请日：2020-06-16
申请人： INTERDIGITAL VC HOLDINGS FRANCE, SAS
发明人： POIRIER, Tangi , LELEANNEC, Fabrice , NASER, Karam , FRANCOIS, Edouard
IPC分类号： H04N19/12 , H04N19/154 , H04N19/176 , H04N19/70
摘要： A lossless coding mode is proposed in a video coding system comprising a plurality of coding tools, some being lossy by design, some of which can be adapted to become lossless or near lossless. To enable a lossless mode in such system, it is proposed to disable the tools that are lossy by design and use only lossless tools, to adapt some tools to enable lossless coding, and adapt some tools to enable near-lossless coding so that a secondary lossless coding may be applied after residual coding. In a specific embodiment, it is proposed to determine the type of residual coding by, when an information indicates that a transform skip residual coding is used, obtaining a flag representative of a special mode, and when this flag is true, determine that regular residual coding must be used instead of the transform skip residual coding that should be used.

44. 发明申请

WO2020016350A1 A METHOD AND APPARATUS FOR GENERATING AN IMMERSIVE IMAGE FROM IMAGES CAPTURED BY A PLURALITY OF CAMERAS 审中-公开
公开(公告)号：WO2020016350A1
公开(公告)日：2020-01-23
申请号：PCT/EP2019/069350
申请日：2019-07-18
申请人： THOMSON LICENSING
发明人： DANIEAU, Fabien , LEROY, Bertrand , DUMAS, Olivier , LOPEZ, Thomas
IPC分类号： H04N13/117 , H04N13/344 , G06T15/20 , H04N13/383
摘要： A device for generating an image by projecting a plurality of source images onto this image according to a center of projection and a mapping. A source image is associated with a view direction according to the center of projection and the projection itself, the device comprises a memory associated with a processor configured for obtaining a direction of interest for said image; and for a pixel of the immersive image to generate, when a plurality of source pixels from the plurality of source images are projectable onto said pixel according to the center of projection and the mapping, one of these source pixels is selected to provide the considered pixel a color value. The selecting of the source pixel is performed according to the angle formed the direction of interest and the view direction of the source image the source pixel belongs to.

45. 发明申请

WO2018220142A1 METHOD AND APPARATUS FOR NETWORK ACCESS CONTROL 审中-公开
公开(公告)号：WO2018220142A1
公开(公告)日：2018-12-06
申请号：PCT/EP2018/064379
申请日：2018-05-31
申请人： INTERDIGITAL CE PATENT HOLDINGS
发明人： ERIKSSON, Brian Charles , PUDHIYAVEETIL, Ajith , SUN, Yifan
IPC分类号： H04W12/08 , H04L29/06
摘要： A method (400) of generating guest accounts in a local area network is provided including determining (410) a presence of at least one user in a premises and generating (420) at least one guest account in a local area network established in the premises based on the determined presence. An apparatus (101, 102, 300) for generating guest accounts in a local area network is provided, the apparatus including a processor (304), and at least one memory (312) coupled with the processor, the processor being configured to determine a presence of at least one user in a premises and generate at least one guest account in a local area network (150) established in the premises based on the determined presence. A computer-readable storage medium and a non-transitory computer-readable program product are also described.

46. 发明申请

WO2018095799A1 METHOD, APPARATUS, AND SYSTEM FOR CONTROLLING ACCESS TO A LOCAL NETWORK 审中-公开
公开(公告)号：WO2018095799A1
公开(公告)日：2018-05-31
申请号：PCT/EP2017/079434
申请日：2017-11-16
申请人： THOMSON LICENSING
发明人： NEUMANN, Christoph , LOEFFLER, Siegfried , ONNO, Stephane , HEEN, Olivier , LE MERRER, Erwan
IPC分类号： H04W12/08 , H04L29/06 , H04W84/12
摘要： The invention relates to a method for controlling access to a first network, comprising receiving, by a first network access device of the first network, an access request from a visiting user device, determining, by the first network access device, if the visiting user device was granted an access to the first network, if the visiting device has not been granted an access to the first network, determining if there is a second network access device that granted the visiting user device an access to a second network and the second network access device is linked to the first network access device, and if the second network access device exists, granting the visiting user device an access to the first network by the first network access device.

47. 发明申请

WO2016202764A1 APPARATUS AND METHOD FOR VIDEO ZOOMING BY SELECTING AND TRACKING AN IMAGE AREA 审中-公开
标题翻译：通过选择和跟踪图像区域进行视频缩放的装置和方法
公开(公告)号：WO2016202764A1
公开(公告)日：2016-12-22
申请号：PCT/EP2016/063559
申请日：2016-06-14
申请人： THOMSON LICENSING
发明人： VERDIER, Alain , CAZETTES, Christophe , GANDON, Cyrille , GARNIER, Bruno
IPC分类号： G06F3/0488 , G06K9/00
CPC分类号： G06F3/0488 , G06F2203/04806 , G06K9/00221 , G06K9/00362 , G06K9/22 , G06K9/3233 , G06K2009/3291
摘要： The principles disclose a method enabling a video zooming feature while playing back or capturing a video signal on a device (100). A typical example of device implementing the method is a handheld device such as a tablet or a smartphone. When the zooming feature is activated, the user double taps to indicate the area on which he wants to zoom in. This action launches the following actions: first, a search window (420) is defined around the position of the user tap, then human faces are detected in this search window, the face (430) nearest to the tap position is selected, a body window (440) and a viewing window (450) are determined according to the selected face and some parameters. The viewing window (450) is scaled so that it is only showing a partial area of the video. The body window (440) will be tracked in the video stream and motions of this area within the video will be applied to the viewing window (450), so that it stays focused on the previously selected person of interest. Furthermore, it is continuously checked that the selected face is still present in the viewing window (450). In case of error regarding the last check, the viewing window position is adjusted to include the position of the detected face. The scaling factor of the viewing window is under control of the user through a slider preferably displayed on the screen.
摘要翻译：原理公开了一种在设备（100）上播放或捕获视频信号的同时实现视频缩放特征的方法。实现该方法的设备的典型示例是手持设备，例如平板电脑或智能电话。当激活缩放功能时，用户双击以指示他要放大的区域。此操作启动以下操作：首先，围绕用户点击的位置定义搜索窗口（420），然后是人在该搜索窗口中检测到面部，选择最接近抽头位置的面部（430），根据所选择的面部和一些参数来确定身体窗口（440）和观察窗口（450）。观看窗口（450）被缩放以使其仅显示视频的部分区域。身体窗口（440）将被跟踪在视频流中，视频内该区域的运动将被应用到观看窗口（450），使得它保持聚焦在先前选择的感兴趣的人物上。此外，持续检查所选择的脸部是否仍然存在于观看窗口（450）中。在关于最后一次检查的错误的情况下，将观察窗口位置调整为包括检测到的面部的位置。观看窗口的缩放因子由用户通过优选地在屏幕上显示的滑块来控制。

48. 发明申请

WO2015101533A1 MULTI-HOP PROXY RE-ENCRYPTION METHODS AND DEVICES 审中-公开
标题翻译：多重代码重新加密方法和设备
公开(公告)号：WO2015101533A1
公开(公告)日：2015-07-09
申请号：PCT/EP2014/078872
申请日：2014-12-19
申请人： THOMSON LICENSING
发明人： HEEN, Olivier , JOYE, Marc , LIBERT, Benoît
IPC分类号： H04L9/08 , H04L9/30 , H04L29/06
CPC分类号： H04L9/30 , H04L9/0825 , H04L63/0464 , H04L63/0478 , H04L2209/76
摘要： The disclosure is directed to a proxy re-encryption scheme with limited delegations. To generate a formula (I) ciphertext for a message, wherein formula (II) is an integer, a (I) ciphertext enabling formula (IV) levels of re-encryption and L-1 is a maximum number of possible re-encryption levels, a processor (112) generates, in a (I) group of prime order p, a (I) encryption key for the (I) ciphertext from a public key and a (I) generator for the (I) group; obtains a first ciphertext component by multiplying the message with a generator of a final group formula (III) of a multi-linear configuration with L levels, the generator being raised to the power of an integer exponent; obtains a second ciphertext component by taking the (I) encryption key to the power of the integer exponent; and outputs the (I) ciphertext comprising the integer (II), the first ciphertext component and the second ciphertext component. In a preferred embodiment, the processor (112) includes an indicator of a time period in the (I) ciphertext; and, if the integer (IV), obtains a third ciphertext component by taking a hash value over the time period to the power of the integer exponent and includes the third ciphertext component in the (I) ciphertext that is output. Also provided are the re-encryption and decryption counterparts.
摘要翻译：本公开涉及具有有限授权的代理重新加密方案。为了生成消息的公式（I）密文，其中公式（II）是整数，（I）密文使能公式（IV）再加密和L-1的级别是可能的重新加密级别的最大数量处理器（112）以（I）素数阶组p生成来自公钥的（I）密文和（I）组的（I）生成器的（I）加密密钥; 通过将消息与具有L个级别的多线性配置的最终组公式（III）的生成器相乘来获得第一密文分量，生成器被提升为整数指数的幂; 通过将（I）加密密钥乘以整数指数的幂来获得第二密文分量; 并输出包含整数（II），第一密文分量和第二密文分量的（I）密文。在优选实施例中，处理器（112）包括（I）密文中的时间段的指示符; 并且如果整数（IV）通过将该时间周期的散列值取为整数指数的幂来获得第三密文分量，并且包括输出的（I）密文中的第三密文分量。还提供了重新加密和解密对手。

49. 发明申请

WO2014090730A1 A TOOL FOR DIRECTION ASSISTANCE FOR FILM PRE-PRODUCTION 审中-公开
标题翻译：用于电影预处理的方向辅助工具
公开(公告)号：WO2014090730A1
公开(公告)日：2014-06-19
申请号：PCT/EP2013/075923
申请日：2013-12-09
申请人： THOMSON LICENSING
发明人： MAETZ, Yves , ELUARD, Marc
IPC分类号： G06Q10/06 , G06Q30/02
CPC分类号： G06F17/30554 , G06F3/0482 , G06F17/30958 , G06Q10/06 , G09C5/00 , G11B27/036 , H04L9/28
摘要： A cost estimation tool (100) for pre-production of a film comprising a processing unit (102) configured to obtain a script divided into a plurality of scenes, receive user input identifying at least one script element such as props and settings in the script; propose to a user at least two techniques for shooting at least one script unit such as a shot or a scene; receive user input selecting a technique for shooting at least one script unit; interact with a database (150) to obtain cost estimates for the identified script elements and the proposed techniques for shooting; calculate a cost estimate for the film based on the identified script elements and the selected techniques for shooting; and output the cost estimate.
摘要翻译：一种用于预制片的成本估算工具（100），包括：处理单元（102），被配置为获得分成多个场景的脚本，接收标识至少一个脚本元素（例如道具的脚本元素）的用户输入和脚本中的设置 ; 向用户提出至少两种用于拍摄至少一个脚本单元（如镜头或场景）的技术; 接收选择用于拍摄至少一个脚本单元的技术的用户输入; 与数据库（150）交互以获得所识别的脚本元素和所提出的拍摄技术的成本估计; 基于所识别的脚本元素和所选择的拍摄技术来计算电影的成本估计; 并输出成本估算值。

50. 发明申请

WO2014020030A1 CRYPTOGRAPHIC GROUP SIGNATURE METHODS AND DEVICES 审中-公开
标题翻译： CRYPTOGRAPHIC GROUP签名方法和设备
公开(公告)号：WO2014020030A1
公开(公告)日：2014-02-06
申请号：PCT/EP2013/066018
申请日：2013-07-30
申请人： THOMSON LICENSING
发明人： EL AIMANI, Laila , SANDERS, Olivier
IPC分类号： H04L9/32
CPC分类号： H04L9/3255
摘要： A processor (111) of a device (110) having a public/private key pair comprising a private key sk i , and a corresponding public key vk i , generates a group signature μ on a plaintext m by: randomizing at least part of a certificate σ cert for the public/private key pair to obtain at least a randomized part r' cert of the certificate σ cert ; obtaining a one-time signature key pair (sk ots ,vk ots ); generating, using the private key sk i ; a first signature σι on the message m, the public one-time signature key vk ots and at least the randomized part r' cert of the certificate σ cert ; generating a non-interactive zero-knowledge proof P that at least the randomized part r' cert is at least part of a valid signature for the public/private key pair; generating a second signature σ ots , using the private one-time signature key vk ots , the first signature σι and the plaintext m; and outputting the group signature μ comprising at least the randomized part r' cert of the certificate a cert , the public one- time signature key vk ots , the first signature σ 1 , the non-interactive zero-knowledge proof P, and the second signature σ ots . Also provided is a device and a method for verifying generated group signatures
摘要翻译：具有包含私钥滑雪的公共/私人密钥对的设备（110）的处理器（111）和相应的公钥vki通过以下方式生成明文m上的组签名mu：将至少部分证书sigmacert 用于公钥/私钥对至少获得证书sigmacert的随机部分r'cert; 获得一次性签名密钥对（skots，vkots）; 生成，使用私钥滑雪; 消息m上的第一个签名sigmaiota，公共一次签名密钥vkots和至少证书sigmacert的随机部分r'cert; 产生至少所述随机部分r'cert是所述公共/私人密钥对的有效签名的至少一部分的非交互式零知识证明P; 使用私有的一次性签名密钥vkots，第一个签名sigmaiota和明文m生成第二个签名sigmaots; 并输出至少包括认证书的随机化部分r'cert，公共一次性签名密钥vkot，第一签名σ1，非交互式零知识证明P和第二签名sigmaot的组签名mu。还提供了用于验证所生成的组签名的装置和方法

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式