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1. 发明申请

WO2021121313A1 METHOD AND APPARATUS OF CONSTRAINED LAYER-WISE VIDEO CODING 审中-公开
公开(公告)号：WO2021121313A1
公开(公告)日：2021-06-24
申请号：PCT/CN2020/137176
申请日：2020-12-17
申请人： MEDIATEK INC.
发明人： CHUANG, Tzu-Der , HSU, Chih-Wei , CHEN, Ching-Yeh , CHEN, Lulin
IPC分类号： H04N7/00 , H04N21/435 , H04N19/105 , H04N19/159 , H04N19/186 , H04N19/187 , H04N19/573
摘要： 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.

2. 发明申请

WO2018171758A1 METHOD AND APPARATUS FOR DERIVING VR PROJECTION, PACKING, ROI AND VIEWPORT RELATED TRACKS IN ISOBMFF AND SUPPORTING VIEWPORT ROLL SIGNALING 审中-公开
公开(公告)号：WO2018171758A1
公开(公告)日：2018-09-27
申请号：PCT/CN2018/080338
申请日：2018-03-23
申请人： MEDIATEK INC.
发明人： WANG, Xin , CHEN, Lulin , LAI, Wang Lin
IPC分类号： H04N21/218 , H04N21/234 , H04N21/40 , H04N5/262
摘要： A video processing method includes receiving a virtual reality (VR) content, obtaining a picture from the VR content, encoding the picture 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 transform property item that is set to enable at least one of a projection transformation, a packing transformation, a VR viewport selection, and a VR region of interest (ROI) selection in track derivation. In another exemplary implementation, the ISOBMFF file (s) may include a first parameter, a second parameter, and a third parameter associated with orientation of a viewport, with the first, second and third parameters indicating a yaw angle, a pitch angle and a roll angle of a center of the viewport, respectively. Further, an associated video processing apparatus is provided.

3. 发明申请

WO2020259631A1 SIGNALING CODING OF TRANSFORM-SKIPPED BLOCKS 审中-公开
公开(公告)号：WO2020259631A1
公开(公告)日：2020-12-30
申请号：PCT/CN2020/098271
申请日：2020-06-24
申请人： MEDIATEK INC.
发明人： HSIANG, Shih-Ta , CHEN, Lulin , CHUANG, Tzu-Der , HSU, Chih-Wei , CHEN, Ching-Yeh , CHUBACH, Olena , HUANG, Yu-Wen
IPC分类号： H04N19/103 , H04N19/46 , H04N19/146
摘要： A method for performing transform skip mode (TSM) in a video decoder is provided. A video decoder receives data from a bitstream to be decoded as a plurality of video pictures. The video decoder parses the bitstream for a first syntax element in a sequence parameter set (SPS) of a current sequence of video pictures. When the first syntax element indicates that transform skip mode is allowed for the current sequence of video pictures and when transform skip mode is used for a current block in a current picture of the current sequence, the video decoder reconstructs the current block by using quantized residual signals that are not transformed.

4. 发明申请

WO2017129051A1 METHOD AND SYSTEM FOR STREAMING APPLICATIONS USING RATE PACING AND MPD FRAGMENTING 审中-公开
标题翻译：用于使用速率调整和MPD碎化来应用流的方法和系统
公开(公告)号：WO2017129051A1
公开(公告)日：2017-08-03
申请号：PCT/CN2017/071820
申请日：2017-01-20
申请人： MEDIATEK INC.
发明人： CHEN, Lulin , LIU, Shan , LAI, Wang-Lin
IPC分类号： H04L29/06
CPC分类号： H04L29/06 , H04L65/00 , H04L67/02 , H04L67/26
摘要： 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.
摘要翻译：公开了一种使用DASH（基于HTTP的动态自适应流媒体）的多媒体流服务的方法和系统。根据这种方法，一个或多个推送指令从客户端发送到服务器以指示与所请求的媒体数据有关的信息。每个Push指令包括包括推送速率和推送速率指令的推送类型，其包括与与请求的媒体数据相关的推送数据速率相关联的信息。如果服务器接收到推送速率指令，则根据推送数据速率将请求的媒体数据的一组或多组数据从服务器推送到客户端。根据另一种方法，使用分段MPD，其中至少一个分段MPD省略MPD报头，MPD有效载荷，周期报头或周期有效载荷。在又一种方法中，状态消息组包括SharedResourceAllocation消息，该消息包括包括带宽和pacingRate的参数。

5. 发明申请

WO2021115386A1 VIDEO ENCODING OR DECODING METHODS AND APPARATUSES WITH SCALING RATIO CONSTRAINT 审中-公开
公开(公告)号：WO2021115386A1
公开(公告)日：2021-06-17
申请号：PCT/CN2020/135301
申请日：2020-12-10
申请人： MEDIATEK INC.
发明人： CHUANG, Tzu-Der , HSU, Chih-Wei , CHEN, Ching-Yeh , TSAI, Chia-Ming , CHEN, Chun-Chia , CHUBACH, Olena , CHEN, Lulin , HUANG, Yu-Wen
IPC分类号： H04N19/51 , H04N19/513 , H04N19/33
摘要： Video processing methods and apparatuses for processing a current block in a current picture by reference picture resampling include receiving input data of the current block, determining a scaling window of the current picture and a scaling window of a reference picture. The current picture and reference picture may have different scaling window sizes. A ratio between a scaling window width, height, or size of the current picture and a scaling window width, height, or size of the reference picture is constrained to be within a ratio constraint. A reference block is generated from the reference picture according to the ratio, and used to encode or decode the current block.

6. 发明申请

WO2021088919A1 METHOD AND APPARATUS OF SIGNALING SUBPICTURE INFORMATION IN VIDEO CODING 审中-公开
公开(公告)号：WO2021088919A1
公开(公告)日：2021-05-14
申请号：PCT/CN2020/126716
申请日：2020-11-05
申请人： MEDIATEK INC.
发明人： LAI, Chen-Yen , HSIANG, Shih-Ta , CHUBACH, Olena , CHUANG, Tzu-Der , CHEN, Ching-Yeh , CHEN, Lulin
IPC分类号： H04N19/85
摘要： 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.

7. 发明申请

WO2018233693A1 METHODS AND APPARATUS FOR DERIVING COMPOSITE TRACKS 审中-公开
公开(公告)号：WO2018233693A1
公开(公告)日：2018-12-27
申请号：PCT/CN2018/092446
申请日：2018-06-22
申请人： MEDIATEK INC.
发明人： WANG, Xin , CHEN, Lulin , ZHAO, Shuai
IPC分类号： H04N19/119
摘要： It provides a method, apparatus, and computer readable media configured to process (including encoding and decoding) composition layouts. The video data includes a plurality of encoded two-dimensional sub-picture tracks associated with a viewport and a composition operation to compose the tracks. The composition operation comprises data indicative of a composition to perform on the plurality of two-dimensional sub-picture tracks to compose the tracks into a canvas associated with the viewport, and a composition layout operation to adjust the composition if the canvas comprises a composition layout created by two or more of the plurality of two-dimensional sub-picture tracks composed on the canvas. The plurality of two-dimensional tracks are composed into the canvas according to the composition, comprising determining two or more of the composed two-dimensional sub-picture tracks comprise the composition layout, and adjusting the composition based on the composition layout operation to compensate for the composition layout.

8. 发明申请

WO2018171794A1 METHODS AND APPARATUS FOR MEDIA CONTENT ASSET CHANGES 审中-公开
公开(公告)号：WO2018171794A1
公开(公告)日：2018-09-27
申请号：PCT/CN2018/080412
申请日：2018-03-26
申请人： MEDIATEK INC.
发明人： CHEN, Lulin
IPC分类号： H04N21/234
CPC分类号： H04N21/845 , H04N19/107 , H04N19/142 , H04N19/172 , H04N19/70 , H04N21/23424 , H04N21/23439 , H04N21/8455 , H04N21/85406
摘要： The techniques described herein relate to methods, apparatus, and computer readable media configured to process asset change point locations. A processor or encoder is configured to operate according to a set of constraints that constrain the encoding process for asset changes, wherein the set of constraints configures a set of allowable asset change point locations from a set of possible asset change point locations, wherein the set of allowable asset change point locations is a subset of the set of possible asset change point locations, and configures a set of allowable data access types from a set of possible data access types, wherein the set of allowable data access types is a subset of the set of possible data access types. Video data is encoded based on the set of constraints to generate encoded first video data, such that the encoded first video data comprises a set of asset change point locations and associated data access types in compliance with the set of constraints.

9. 发明申请

WO2017133659A1 METHOD AND SYSTEM OF PUSH-TEMPLATE AND URL LIST FOR DASH ON FULL-DUPLEX PROTOCOLS 审中-公开
标题翻译：用于全双工协议上的DASH的推模和URL列表的方法和系统
公开(公告)号：WO2017133659A1
公开(公告)日：2017-08-10
申请号：PCT/CN2017/072817
申请日：2017-02-03
申请人： MEDIATEK INC.
发明人： LAI, Wang-Lin , LIU, Shan , CHEN, Lulin
IPC分类号： H04N21/25
CPC分类号： H04N21/25 , H04L65/00 , H04N21/64746 , H04N21/8456
摘要： A method and system of message exchange for controlling flow associated with multimedia streaming services from a server to a client using DASH are disclosed. In one method, one or more Push Directives are sent from a client to a server to indicate information related to media data requested. At least one selected Push Directive uses one URLTemplate that comprises a list of media parameter values, and where each media parameter value corresponds to one media parameter associated with one media segment requested. The server then pushes one or more groups of data for the media data requested to the client according to the list of media parameter values. In another method, at least one selected Push Directive uses one URLTemplate that includes a first number to represent a number of repeating difference of media parameter values associated with requested media segments.
摘要翻译：公开了一种用于使用DASH来控制与从服务器到客户端的多媒体流服务相关联的流的消息交换方法和系统。在一种方法中，一个或多个推送指令从客户端发送到服务器以指示与所请求的媒体数据相关的信息。至少一个选定的Push指令使用一个包含媒体参数值列表的URLTemplate，并且其中每个媒体参数值对应于与所请求的一个媒体段相关联的一个媒体参数。服务器然后根据媒体参数值的列表将媒体数据的一个或多个数据组推送给客户端。在另一种方法中，至少一个选择的推送指令使用一个URLTemplate，其包括第一数字以表示与所请求的媒体段相关联的媒体参数值的重复差异的数目。

10. 发明申请

WO2021047590A1 SIGNALING OF SUBPICTURE STRUCTURES 审中-公开
公开(公告)号：WO2021047590A1
公开(公告)日：2021-03-18
申请号：PCT/CN2020/114508
申请日：2020-09-10
申请人： MEDIATEK INC.
发明人： HSU, Chih-Wei , CHEN, Lulin , HUANG, Yu-Wen
IPC分类号： H04N19/169 , H04N19/119 , H04N19/17
摘要： A method for signaling subpicture structures for coded video is provided. A video decoder receives data from a bitstream to be decoded as a sequence of video pictures. The video decoder receives from the bitstream subpicture specification for one or more subpictures in the sequence of video pictures. The subpicture specification identifies a position and a size for each subpicture by providing an index that identifies a coding tree unit (CTU) for the subpicture. The video decoder reconstructs each subpicture for the sequence of video pictures according to the subpicture specification.

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