公开(公告)号：US11109022B2

公开(公告)日：2021-08-31

申请号：US16708097

申请日：2019-12-09

Applicant: Huawei Technologies Co., Ltd.

Inventor： Dimitrios Tsilimantos ,  Zhijun Chao ,  Afef Feki ,  Amaya Nogales Gomez ,  Xianwen Shi ,  Haifeng Tang ,  Stefan Valentin

IPC: H04N19/109 ,  H04N19/159 ,  H04N19/172 ,  H04N19/177 ,  H04L29/06

Abstract: The application relates to a method and a transmitter communication device configured to provide video data to a receiver communication device, wherein the video data comprises one or more groups of frames and each group of frames comprises a plurality of temporally successive frames. The method comprises processing a first frame of a current, i.e. currently processed group of frames using a first modulation and coding scheme of a plurality of modulation and coding schemes and processing a second frame of the current group of frames using a second modulation and coding scheme of the plurality of modulation and coding schemes, and further selecting the second modulation and coding scheme of the plurality of modulation and coding schemes on the basis of a temporal position of the second frame relative to the first frame of the current group of frames.

公开(公告)号：US10999204B2

公开(公告)日：2021-05-04

申请号：US16688601

申请日：2019-11-19

Applicant: Huawei Technologies Co., Ltd.

Inventor： Dimitrios Tsilimantos ,  Stefan Valentin ,  Theodoros Karagkioules ,  Amaya Nogales Gomez ,  Xianwen Shi ,  Zhijun Chao

IPC: H04L12/851 ,  H04L12/801 ,  H04L12/853 ,  H04L12/841 ,  H04L12/835 ,  H04L29/06

Abstract: Traffic profiling in real time within a video streaming session is described. Multiple data packet flows at a lower layer of the OSI model are observed. A data packet flow pattern is obtained for each observed flow, and each obtained pattern is compared to a pre-defined characteristic streaming pattern. From the observed flows, any data packet flow that has its data packet flow pattern close to the pre-defined characteristic streaming pattern is selected as a video streaming flow. A buffer state of the video streaming flow is identified amongst a filling state, a steady state, and a depletion state, by observing a slope of accumulated data over time. Eventually, multimedia-related information of the selected video streaming flow is provided based on its data packet flow pattern.

公开(公告)号：US10680705B2

公开(公告)日：2020-06-09

申请号：US15986627

申请日：2018-05-22

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Afef Feki ,  Melissa Duarte Gelvez ,  Stefan Valentin ,  Luca Rose

IPC: H04B1/60 ,  H04B7/26 ,  H04W16/18 ,  H04W24/02 ,  H04B7/06

Abstract: The disclosure relates to a network entity for selecting a communication relay from a plurality of communication relays within the service area of a base station covering a plurality of geographic positions, wherein each communication relay is able to retransmit a communication between the base station and a user equipment, wherein the network entity comprises a divider configured to divide the service area into a plurality of different regions based on an attenuation measure at each geographic position, a determiner configured to determine for each pair of regions a spatial isolation measure based on the attenuation measures at the geographic positions within the regions, and a selector configured to select a communication relay based on the spatial isolation measures associated with the geographic position of each communication relay.

公开(公告)号：US11202099B2

公开(公告)日：2021-12-14

申请号：US16733984

申请日：2020-01-03

Applicant: Huawei Technologies Co., Ltd.

Inventor： Maxim Borisovitch Sychev ,  Alexis Decurninge ,  Dimitrios Tsilimantos ,  Alexander Alexandrovich Karabutov ,  Stefan Valentin ,  Sergey Yurievich Ikonin

IPC: H04N19/597 ,  H04N13/161 ,  H04N5/232 ,  H04N19/517 ,  H04N19/105 ,  H04N19/139 ,  H04N19/172 ,  H04N19/527 ,  G06T3/60

Abstract: A system and method for improving quality of encoding and decoding a panoramic video. The panoramic video comprises a sequence of encoded picture frames. In panoramic video picture frames are mapped on a spherical viewing area. In the method the projection center of the encoded frame is transformed before encoding. In the decoding phase the projection center is transformed back accordingly after decoding the frame.