公开(公告)号：WO2023086795A1

公开(公告)日：2023-05-19

申请号：PCT/US2022/079500

申请日：2022-11-08

Applicant: NETFLIX, INC.

Inventor： BAMPIS, Christos G. ,  LI, Zhi

IPC: H04N21/2343 ,  H04N21/25 ,  H04N21/2662 ,  H04N21/4402 ,  H04N21/466 ,  G06N3/045

Abstract: In various embodiments an endpoint application reconstructs downscaled videos. The endpoint application accesses metadata associated with a portion of a downscaled video that has a first resolution and was generated using a trained downscaling convolutional neural network (CNN). The endpoint application determines, based on the metadata, an upscaler that should be used when upscaling the portion of the downscaled video. The endpoint application executes the upscaler on the portion of the downscaled video to generate a portion of a reconstructed video that is accessible for playback and has a second resolution that is greater than the first resolution.

公开(公告)号：WO2023085559A1

公开(公告)日：2023-05-19

申请号：PCT/KR2022/012095

申请日：2022-08-12

Applicant: 삼성전자 주식회사

Inventor： 유기원

IPC: H04N21/2343 ,  H04N21/24 ,  H04N21/2662

Abstract: 본 개시의 다양한 실시예는 영상수신장치로부터 수신한 제어 정보에 기초하여 결정된 네트워크 대역 예측값 및 해상도/프레임율 변경 여부를 판단할 수 있는 기준값인 이중 대역 임계값에 기초하여 영상의 해상도/프레임율을 변경함으로써 네트워크 대역 변동성에 강건하게 대처할 수 있는 영상송신장치 및 방법에 관한 것이다. 이를 위한 영상송신장치는 영상신호를 입력받고; 상기 영상신호의 해상도 또는 프레임율의 변경 여부를 판단할 수 있는 기준값인 이중 대역 임계값을 설정하고; 영상수신장치로부터 수신한 소정의 제어 정보에 기초하여 네트워크 대역 예측값을 결정하고; 상기 네트워크 대역 예측값 및 상기 이중 대역 임계값에 기초하여 영상의 해상도 또는 프레임율의 변경 여부를 판단하고; 해상도 또는 프레임율이 변경된 경우, 프레임 시퀀스 정보를 갱신하고; 변경된 해상도 또는 프레임율에 기초하여 인코딩 파라미터를 설정하고; 상기 설정된 인코딩 파라미터에 기초하여 영상신호를 인코딩하고; 상기 인코딩된 영상신호를 상기 영상수신장치에게 송신하는 동작들을 포함할 수 있다.

公开(公告)号：WO2023076817A1

公开(公告)日：2023-05-04

申请号：PCT/US2022/078268

申请日：2022-10-18

Applicant: SENSORMATIC ELECTRONICS, LLC

Inventor： DE BOCK, Thibaut

IPC: H04N19/23 ,  H04N19/30 ,  H04N21/81 ,  H04N21/845 ,  H04N21/2343

Abstract: Apparatus and methods for processing video surveillance data includes training a data repository, using a first plurality of surveillance video files including a first plurality of video frames, to identify macroblocks of the video frames representing average content of the first plurality of surveillance video files. An ordered data structure is generated by sorting the plurality of macroblocks of video frames based on image differences within the plurality of macroblocks. The ordered data structure includes a root node. A second plurality of surveillance video files including a second plurality of video frames is received. The second plurality of video frames is inserted into the generated ordered data structure. References to the generated ordered data structure are stored in the data store for each frame of the second plurality of video frames along with a difference between corresponding video frames and references.

公开(公告)号：WO2023075012A1

公开(公告)日：2023-05-04

申请号：PCT/KR2021/018752

申请日：2021-12-10

Applicant: 한국전자기술연구원

Inventor： 장준환 ,  박우출 ,  양진욱 ,  윤상필 ,  최민수 ,  이준석 ,  송수호 ,  구본재

IPC: H04N21/81 ,  H04N21/262 ,  H04N21/4728 ,  H04N21/2343 ,  H04N21/4402 ,  H04N21/431

Abstract: 사용자의 관심영역 추정이 가능한 저지연 360 VR 스트리밍 방법이 제공된다. 상기 방법은 사용자 디바이스로부터 디바이스 포즈 정보를 수신하는 단계; 상기 디바이스 포즈 정보에 기초하여 사용자의 관심영역을 추출하는 단계; 상기 관심영역에 상응하는 관심영역 타일 정보를 생성하는 단계; 상기 관심영역이 변경될 위치에 상응하는 관심영역 추정 타일 정보를 생성하는 단계; 상기 관심영역 타일 정보 및 관심영역 추정 타일 정보에 상응하는 타일을 스트리밍 서버로 요청하여, 고품질 타일 스트림 및 전체 영상의 저품질 타일 스트림(이하, 저품질 전체 영상 타일 스트림)을 수신하는 단계; 상기 고품질 타일 스트림과 저품질 전체 영상 타일 스트림을 디코딩 및 렌더링하는 단계; 및 상기 렌더링된 영상을 사용자 디바이스로 제공하는 단계를 포함한다.

公开(公告)号：WO2023069078A1

公开(公告)日：2023-04-27

申请号：PCT/US2021/055580

申请日：2021-10-19

Applicant: BITMOVIN, INC.

Inventor： NGUYEN, Minh ,  CETINKAYA, Ekrem ,  TIMMERER, Christian ,  HELLWAGNER, Hermann

IPC: H04N21/2343 ,  G06T3/40 ,  H04N21/4402 ,  H04N21/647 ,  H04N21/6547

Abstract: A mobile device capable of device-adaptive super-resolution based adaptive streaming may include a super-resolution-based adaptive bitrate (SR-based ABR) application configured to receive an input and determine a quality of a representation of a video to request based on the input, the SR-based ABR application being able to compute a cost of requesting the quality of representation based on a cost function. The mobile device may apply an SR network to the representation of the video to upscale the representation of the video to a desired resolution. The mobile device also may include a display configured to play back a segment of the video. A method for SR-based adaptive streaming may include receiving an input, determining whether to request a lower resolution representation of a video segment based on the input, and applying an SR network to the lower resolution representation to upscale it to a desired resolution.

公开(公告)号：WO2023063711A1

公开(公告)日：2023-04-20

申请号：PCT/KR2022/015384

申请日：2022-10-12

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： ZHENG, Xinjian ,  DING, Liang

IPC: H04N21/462 ,  H04N21/4402 ,  H04N21/2662 ,  H04N21/2343 ,  H04N7/01

Abstract: The present disclosure provides a multimedia file playing method and apparatus for a rotatable device. In some embodiments, the method includes grouping, in a level-by-level grouping manner and based on a specified grouping parameter sequence, files in a multimedia file library, to obtain a plurality of groups of files. Different parameters in the specified grouping parameter sequence correspond to different grouping granularities. The method further includes generating a sub file sequence for each height-width ratio type in each group of the plurality of groups of files. The height-width ratio type includes a horizontal screen type, a vertical screen type, and a square screen type.. The method further includes generating and playing a file playing sequence according to a received file playing instruction, and based on sub file sequences of a corresponding group of the plurality of groups of files and a principle of minimum number of device rotations.

公开(公告)号：WO2023049629A1

公开(公告)日：2023-03-30

申请号：PCT/US2022/076119

申请日：2022-09-07

Applicant: NETFLIX, INC.

Inventor： VENKATRAV, Subrahmanya ,  CHEN, Chao ,  CONCOLATO, Cyril ,  LIU, Xiaomei ,  MOORTHY, Anush

IPC: H04N21/218 ,  H04N21/222 ,  H04N21/231 ,  H04N21/232 ,  H04N21/234 ,  H04N21/2343 ,  H04N21/262 ,  H04N21/845 ,  H04N21/854 ,  H04N21/84

Abstract: Various embodiments set forth a computer-implemented method for processing media files comprising receiving an index file corresponding to a source media file, wherein the index file indicates location information associated with a plurality of encoded portions of the source media file; retrieving one or more encoded portions included in the plurality of encoded portions from at least one storage device based on the index file; and generating at least part of an encoded version of the source media file based on the one or more encoded portions.

公开(公告)号：WO2023047014A1

公开(公告)日：2023-03-30

申请号：PCT/FI2022/050564

申请日：2022-08-31

Applicant: NOKIA TECHNOLOGIES OY

Inventor： ZARE, Alireza ,  AMINLOU, Alireza ,  HANNUKSELA, Miska, Matias

IPC: H04N19/174 ,  H04N19/119 ,  H04N19/33 ,  H04N19/85 ,  H04N21/2343 ,  H04N21/4728 ,  H04N19/82 ,  H04N19/117

Abstract: A method comprising: dividing pictures of one or more input picture sequences into a plurality of subpictures (1000); encoding each of the subpictures into a plurality of subpicture versions having different quality and/or resolution (1002); partitioning the plurality of subpicture versions into one or more subpicture groups (1004); and allocating a range of adaptive loop filter parameter set identifiers coefficients for each of said subpicture groups (1006).

公开(公告)号：WO2023039112A1

公开(公告)日：2023-03-16

申请号：PCT/US2022/042969

申请日：2022-09-08

Applicant: DOLBY LABORATORIES LICENSING CORPORATION

Inventor： KADU, Harshad ,  SU, Guan-Ming ,  QU, Sheng ,  KLITTMARK, Per Jonas Andreas ,  GANAPATHY KATHIRVELU, Hariharan

IPC: H04N19/30 ,  H04N19/70 ,  H04N21/2343

Abstract: Tensor-Product B-splines (TPB) have been shown to improve video quality when used to represent reshaping functions to map reshaped standard dynamic range content into high dynamic range (HDR) content; however, TPB prediction is computationally intensive and may not be supported by legacy devices. Methods and systems for backwards-compatible signaling of TPB-related metadata and a fast TPB prediction method are presented to overcome both of these limitations. Computation overhead for a TPB-based 3D look-up table is reduced by using temporary two-dimensional arrays. A remapping of the most significant bits of a legacy bit-depth parameter allows for backwards compatibility.

公开(公告)号：WO2023033803A1

公开(公告)日：2023-03-09

申请号：PCT/US2021/048423

申请日：2021-08-31

Applicant: GOOGLE LLC

Inventor： ALAKUIJALA, Jyrki ,  FIRSCHING, Moritz, Joachim

IPC: H04N19/37 ,  H04N19/132 ,  H04N19/167 ,  H04N19/136 ,  H04N19/174 ,  H04N19/86 ,  H04N21/2343 ,  H04N21/234 ,  H04N21/4728

Abstract: A computer-implemented method is provided. The method includes receiving, via a computing device, a plurality of bytes of an encoded image, wherein the encoded image comprises a salient portion. The method further includes determining a bounding region for the encoded image, wherein the bounding region is indicative of a location of the salient portion in the encoded image. The method also includes progressively rendering a decoded version of the encoded image, wherein the progressively rendering comprises rendering a high resolution version of the bounding region, and a low resolution version of a portion outside the bounding region.