公开(公告)号：US20200053282A1

公开(公告)日：2020-02-13

申请号：US16498397

申请日：2018-03-29

Applicant: MEDIATEK INC.

Inventor： Xin Wang ,  Lulin Chen ,  Wang Lin Lai

IPC: H04N5/232 ,  H04N21/2343 ,  H04N21/236 ,  H04N21/81 ,  H04N13/139 ,  H04N13/178

Abstract: A video processing method includes receiving a virtual reality (VR) content, encoding visual data obtained from the VR content to generate a part of a coded bitstream, and encapsulating the part of the coded bitstream into ISO Base Media File Format (ISOBMFF) file (s). In one exemplary implementation, the ISOBMFF file (s) may include a timed metadata track associated with a sphere visual track, where the timed metadata track is set to signal that the associated sphere visual track contains at least one spherical region contributed from at least one region visual track. In another exemplary implementation, the ISOBMFF file (s) may include a timed metadata track associated with a region visual track, where the timed metadata track is set to signal that the associated region visual track contributes to at least one spherical region carried in at least one sphere visual track. Further, an associated video processing apparatus is provided.

公开(公告)号：US10542297B2

公开(公告)日：2020-01-21

申请号：US15912413

申请日：2018-03-05

Applicant: MediaTek Inc.

Inventor： Lulin Chen ,  Shan Liu

IPC: H04N21/00 ,  H04N21/234 ,  H03M13/00 ,  H04L29/06 ,  H04N21/236

Abstract: The techniques described herein relate to methods, apparatus, and computer readable media configured to perform an asset change for video data. First video data comprises a sequence of data units separated by data unit boundaries, and a sequence of error correction data units, wherein each error correction data unit is associated with one or more data units from the sequence of data units. Based on the received first video data, it can be determined whether an error correction data unit from the sequence of error correction data units associated with an asset change point of the first video data crosses one or more data unit boundaries of the first video data. Based on the determination, an asset change operation for the first video data and second video data is performed, wherein the second video data is different than the first video data.

公开(公告)号：US20240236393A1

公开(公告)日：2024-07-11

申请号：US18407566

申请日：2024-01-09

Applicant: MEDIATEK INC.

Inventor： Xin Wang ,  Lulin Chen

IPC: H04N21/262 ,  H04N21/236 ,  H04N21/239 ,  H04N21/438 ,  H04N21/84 ,  H04N21/845

CPC classification number: H04N21/26258 ,  H04N21/236 ,  H04N21/2393 ,  H04N21/438 ,  H04N21/84 ,  H04N21/8456

Abstract: In certain aspects of the disclosure, methods, and systems of preselections for media processing, streaming and playback are provided. The method includes generating a unified manifest containing a media presentation description for a media content and preparing a media presentation of the media content accordingly, wherein the unified manifest lists all media components and tracks in ISO Base Media File Format (ISOBMFF) files related to the media content and supports preselections in Dynamic Adaptive Streaming over HTTP; and transmitting the unified manifest to a streaming and playback client.

公开(公告)号：US11652903B2

公开(公告)日：2023-05-16

申请号：US17550970

申请日：2021-12-14

Applicant: MediaTek Inc.

Inventor： Lulin Chen ,  Shan Liu ,  Wang Lin Lai

IPC: H04L67/55 ,  H04L65/80 ,  H04L67/02 ,  H04L65/612

CPC classification number: H04L67/55 ,  H04L65/612 ,  H04L65/80 ,  H04L67/02

Abstract: A method and system of multimedia streaming services using DASH (Dynamic Adaptive Streaming over HTTP) are disclosed. According to this method, one or more Push Directives are sent from a client to a server to indicate information related to media data requested. Each Push Directive comprises a Push type including Push-rate and Push-rate Directive includes information associated with a push data rate related to the media data requested. If the Push-rate Directive is received by the server, one or more groups of data for the media data requested are pushed from the server to the client according to the push data rate. According to another method, fragmented MPDS are used, where at least one fragmented MPD omits a MPD header, MPD payload, Period header or Period payload. In yet another method, a status message group includes SharedResourceAllocation message that comprises parameters including bandwidth and pacingRate.

公开(公告)号：US11509938B2

公开(公告)日：2022-11-22

申请号：US17087671

申请日：2020-11-03

Applicant: MEDIATEK INC.

Inventor： Chen-Yen Lai ,  Shih-Ta Hsiang ,  Olena Chubach ,  Tzu-Der Chuang ,  Ching-Yeh Chen ,  Lulin Chen

IPC: H04B1/66 ,  H04N7/12 ,  H04N11/02 ,  H04N11/04 ,  H04N19/70 ,  H04N19/172 ,  H04N19/184

Abstract: Methods and apparatus for video coding are disclosed. According to one method, a bitstream is generated or received, where the bitstream includes a first syntax and a second syntax. The first syntax is related to a target number of bits used to represent a set of third syntaxes and each third syntax specifies one subpicture ID for one subpicture in a set of subpictures. The second syntax is related to a total number of subpictures in the set of subpicture, where a first number that can be represented by the target number of bits is equal to or greater than the total number of subpictures. According to another method, the subpicture ID syntaxes have different values for different subpictures.

公开(公告)号：US11375182B2

公开(公告)日：2022-06-28

申请号：US17121927

申请日：2020-12-15

Applicant: MEDIATEK INC.

Inventor： Tzu-Der Chuang ,  Chih-Wei Hsu ,  Ching-Yeh Chen ,  Lulin Chen

IPC: H04N19/105 ,  H04N19/159 ,  H04N19/573 ,  H04N19/187 ,  H04N19/186

Abstract: Method and apparatus of video coding using a multi-layer prediction mode, are disclosed. According to one method, a bitstream is generated at an encoder side or received at a decoder side, where the bitstream corresponds to coded data of current video data in a current layer. The bitstream complies with a bitstream conformance requirement corresponding both the bit depth values for the current layer and the reference layer being the same and the chroma format index values for the current layer and the reference layer being the same. The current video data in the current layer is then encoded or decoded by utilizing reference video data in the reference layer.

公开(公告)号：US20220109737A1

公开(公告)日：2022-04-07

申请号：US17550970

申请日：2021-12-14

Applicant: MediaTek Inc.

Inventor： Lulin Chen ,  Shan Liu ,  Wang Lin Lai

IPC: H04L67/55 ,  H04L65/612 ,  H04L65/80 ,  H04L67/02

Abstract: A method and system of multimedia streaming services using DASH (Dynamic Adaptive Streaming over HTTP) are disclosed. According to this method, one or more Push Directives are sent from a client to a server to indicate information related to media data requested. Each Push Directive comprises a Push type including Push-rate and Push-rate Directive includes information associated with a push data rate related to the media data requested. If the Push-rate Directive is received by the server, one or more groups of data for the media data requested are pushed from the server to the client according to the push data rate. According to another method, fragmented MPDS are used, where at least one fragmented MPD omits a MPD header, MPD payload, Period header or Period payload. In yet another method, a status message group includes SharedResourceAllocation message that comprises parameters including bandwidth and pacingRate.

公开(公告)号：US11233868B2

公开(公告)日：2022-01-25

申请号：US16072908

申请日：2017-01-20

Applicant: MEDIATEK INC.

Inventor： Lulin Chen ,  Shan Liu ,  Wang-Lin Lai

IPC: H04N7/173 ,  H04L29/08 ,  H04L29/06

Abstract: A method and system of multimedia streaming services using DASH (Dynamic Adaptive Streaming over HTTP) are disclosed. According to this method, one or more Push Directives are sent from a client to a server to indicate information related to media data requested. Each Push Directive comprises a Push type including Push-rate and Push-rate Directive includes information associated with a push data rate related to the media data requested. If the Push-rate Directive is received by the server, one or more groups of data for the media data requested are pushed from the server to the client according to the push data rate. According to another method, fragmented MPDS are used, where at least one fragmented MPD omits a MPD header, MPD payload, Period header or Period payload. In yet another method, a status message group includes SharedResourceAllocation message that comprises parameters including bandwidth and pacingRate.

公开(公告)号：US10924820B2

公开(公告)日：2021-02-16

申请号：US15749562

申请日：2016-08-05

Applicant: MEDIATEK INC.

Inventor： Lulin Chen ,  Shan Liu

IPC: H04N21/845 ,  H04N21/61 ,  H04N21/462 ,  H04N21/44 ,  H04N21/2343

Abstract: A method and device for switching Representations are disclosed. On the server side, leading-picture information associated with leading pictures in an open GOP (group of picture) is signalled in a media presentation description. Each leading picture corresponds to one picture preceding a RAP (Random Access Picture) picture in a segment in an output order and being coded depending on the RAP picture. At the client side, an original Representation and a target representation are received and the leading-picture information for the target Representation is determined from the media presentation description received. A switched presentation is presented, where the switched presentation switches from the original Representation to the target Representation by switching presentation from pictures in the original Representation to pictures in the target Representation at a stream access point (SAP) corresponding to the RAP picture in one segment of the target representation determined according to the leading picture information.

公开(公告)号：US10404411B2

公开(公告)日：2019-09-03

申请号：US16074014

申请日：2017-02-17

Applicant: MEDIATEK INC.

Inventor： Lulin Chen ,  Shan Liu

IPC: H04L1/00 ,  H04L29/06

Abstract: A method and system of AL-FEC using MMT protocol performed are disclosed. For an MMT receiving entity, a bounded FEC configuration setting is received from an MMT sending entity. The bounded FEC configuration setting belongs to an FEC configuration group consisting of at least one FEC configuration setting having a bounded-number of stages or layers of FEC coding structure, where the bounded-number is a positive integer greater than 1. If the bounded FEC configuration setting corresponds to one FEC configuration setting having the bounded-number of stages or layers of FEC coding structure, one or more FEC source packets and FEC repair packets are received from the MMT sending entity are FEC decoded into one recovered MMT packet using a range of FEC schemes having a target number of stages or layers of FEC coding structure from 1 to the bounded-number. The process for an MMT sending entity is also disclosed.