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    FULL RANDOM ACCESS FROM CLEAN RANDOM ACCESS PICTURES IN VIDEO CODING
    21.
    发明授权
    FULL RANDOM ACCESS FROM CLEAN RANDOM ACCESS PICTURES IN VIDEO CODING 有权

    公开(公告)号：EP2842344B1

    公开(公告)日：2018-12-12

    申请号：EP13721237.9

    申请日：2013-04-26

    申请人： Qualcomm Incorporated

    发明人： WANG, Ye-Kui

    IPC分类号： H04N21/44 ,  H04N21/845 ,  H04N21/236 ,  H04N19/70 ,  H04N19/196 ,  H04N19/40

    CPC分类号： H04N19/107 ,  H04N19/196 ,  H04N19/40 ,  H04N19/61 ,  H04N19/70 ,  H04N19/96 ,  H04N21/23614 ,  H04N21/44016 ,  H04N21/8451

    摘要： Techniques of this disclosure provide an indication of whether performing random access from a particular access unit in a bitstream requires fetching of parameter sets from previous access units. A clean random access (CRA) picture can be positioned at any point within a coded video sequence and does not clean a decoded picture buffer (DPB) of a video decoder. In order to perform random access decoding from the CRA picture, a video decoder may need to fetch one or more parameter sets included in unavailable access units that precede the CRA picture. The techniques provide an indication, for each CRA picture, that indicates whether parameter sets included in previous access units are needed to perform random access from the picture. When no parameter sets from previous access units are needed for random access from a particular CRA picture, a video decoder may determine to perform random access from that picture.

    SIGNALING OF PARAMETER SETS IN FILES OF MULTI-LAYER BITSTREAMS
    22.
    发明公开
    SIGNALING OF PARAMETER SETS IN FILES OF MULTI-LAYER BITSTREAMS 审中-公开

    公开(公告)号：EP3363203A1

    公开(公告)日：2018-08-22

    申请号：EP16778167.3

    申请日：2016-09-26

    申请人： Qualcomm Incorporated

    发明人： WANG, Ye-Kui ,  HENDRY, Fnu

    IPC分类号： H04N19/70 ,  H04N21/854 ,  H04N19/30 ,  H04N19/187 ,  H04N19/169

    摘要： A device generates, stores, or obtains a file that complies with a restriction specified in a file format to which the file conforms. The restriction requires that for each respective Intra Random Access Point (IRAP) picture, a parameter set required for decoding the respective IRAP picture is in at least one of the following: a sample entry of the respective IRAP picture's track that is applicable to the respective IRAP picture's sample, a sample entry of a non-corresponding track for the respective IRAP picture carrying a reference layer of the respective IRAP picture's layer, the respective IRAP picture's sample, or a temporally collocated sample of the respective IRAP picture's sample in a track of that carries the reference layer.

    VIDEO CODING WITH IMPROVED RANDOM ACCESS POINT PICTURE BEHAVIORS
    25.
    发明授权
    VIDEO CODING WITH IMPROVED RANDOM ACCESS POINT PICTURE BEHAVIORS 有权

    公开(公告)号：EP2898677B1

    公开(公告)日：2018-05-30

    申请号：EP13759642.5

    申请日：2013-08-27

    申请人： Qualcomm Incorporated

    发明人： WANG, Ye-Kui

    IPC分类号： H04N19/70

    CPC分类号： H04N19/85 ,  H04N19/197 ,  H04N19/70

    摘要： This disclosure describes techniques for selection of coded picture buffer (CPB) parameters used to define a CPB for a video coding device for clean random access (CRA) pictures and broken link access (BLA) pictures in a video bitstream. A video coding device receives a bitstream including one or more CRA pictures or BLA pictures, and also receives a message indicating whether to use an alternative set of CPB parameters for at least one of the CRA pictures or BLA pictures. The message may be received from an external means, such as a processing means included in a streaming server or network entity. The video coding device sets a variable defined to indicate the set of CPB parameters for a given one of the pictures based on the received message, and selects the set of CPB parameters for the given one of the pictures based on the variable for the picture.

    SAMPLE GROUPING SIGNALING IN FILE FORMATS
    27.
    发明公开
    SAMPLE GROUPING SIGNALING IN FILE FORMATS 审中-公开
    文件格式中的示例分组信号

    公开(公告)号：EP3257262A1

    公开(公告)日：2017-12-20

    申请号：EP15826228.7

    申请日：2015-12-16

    申请人： Qualcomm Incorporated

    发明人： HENDRY, Fnu ,  WANG, Ye-Kui

    IPC分类号： H04N21/854 ,  H04N19/70

    摘要： A device generates, in a container box of a file for storage of video contents, a SampleGroupDescription box that provides a sample group description for a sample grouping. The SampleGroupDescription box includes a grouping type syntax element having a particular value. Additionally, the SampleGroupDescription box includes one or more sample group entries. The device generates, in the same container box, a plurality of SampleToGroup boxes. Each respective SampleToGroup box of the plurality of SampleToGroup boxes includes a respective grouping type syntax element having the particular value, includes a respective sample count syntax element indicating a number of samples in a respective sample grouping, and includes a respective group description index syntax element indicating an index of an entry in the SampleGroupDescription box which describes samples of the respective sample grouping. Each sample of the respective sample grouping comprises a respective picture of the video contents.

    DESIGN OF HRD DESCRIPTOR AND BUFFER MODEL OF DATA STREAMS FOR CARRIAGE OF HEVC EXTENSIONS
    29.
    发明公开
    DESIGN OF HRD DESCRIPTOR AND BUFFER MODEL OF DATA STREAMS FOR CARRIAGE OF HEVC EXTENSIONS 审中-公开
    HEVC扩展数据流HRD描述符和缓冲区模型的设计

    公开(公告)号：EP3207710A1

    公开(公告)日：2017-08-23

    申请号：EP15788511.2

    申请日：2015-10-15

    申请人： Qualcomm Incorporated

    发明人： HENDRY, Fnu ,  WANG, Ye-Kui ,  RAMASUBRAMONIAN, Adarsh Krishnan

    IPC分类号： H04N19/70 ,  H04N21/2343 ,  H04N21/44 ,  H04N19/30 ,  H04N19/423

    CPC分类号： H04N19/70 ,  H04L65/4069 ,  H04N19/30 ,  H04N19/423 ,  H04N19/44 ,  H04N21/234327 ,  H04N21/2401

    摘要： A video processing device obtains a data stream comprising a plurality of elementary streams and a High Efficiency Video Coding (HEVC) timing and Hypothetical Reference Decoder (HRD) descriptor. The HEVC timing and HRD descriptor comprises a target schedule index syntax element indicating an index of a delivery schedule. The video processing device may identify, based on a set of parameters, a syntax element in an array of syntax elements in a video parameter set (VPS). The set of parameters may comprise a parameter having a value equal to a value of the target schedule index syntax element. The video processing device may identify, based on an index specified by the identified syntax element, a particular HRD parameters syntax structure in a plurality of HRD parameters syntax structures as being applicable to a particular elementary stream.

    摘要翻译： 视频处理设备获得包括多个基本流和高效视频译码（HEVC）定时以及假想参考解码器（HRD）描述符的数据流。 HEVC时序和HRD描述符包括指示传送时间表的索引的目标时间表索引语法元素。 视频处理装置可基于一组参数识别视频参数集（VPS）中的语法元素阵列中的语法元素。 该组参数可以包括具有等于目标调度索引语法元素的值的值的参数。 视频处理设备可以基于由所识别的语法元素指定的索引来识别多个HRD参数语法结构中的特定HRD参数语法结构为适用于特定基本流。

    MULTI-LAYER VIDEO CODING
    30.
    发明公开
    MULTI-LAYER VIDEO CODING 审中-公开
    MEHRSCHICHTIGE VIDEOCODIERUNG

    公开(公告)号：EP3162071A1

    公开(公告)日：2017-05-03

    申请号：EP15734797.2

    申请日：2015-06-25

    申请人： Qualcomm Incorporated

    发明人： WANG, Ye-Kui ,  HENDRY, Fnu ,  RAMASUBRAMONIAN, Adarsh Krishnan

    IPC分类号： H04N19/70 ,  H04N19/30 ,  H04N19/196

    CPC分类号： H04N19/174 ,  H04N19/129 ,  H04N19/187 ,  H04N19/196 ,  H04N19/30 ,  H04N19/40 ,  H04N19/423 ,  H04N19/44 ,  H04N19/513 ,  H04N19/70

    摘要： A device for encoding video data includes a memory configured to store at least a portion of a multi-layer bitstream of video data and one or more processors configured to determine that a supplemental enhancement information (SEI) message applies to more than one layer of the multi-layer video data; determine that the SEI message references a syntax element that has multiple instances associated with the more than one layer of the multi-layer video data; and set all of the multiple instances to a same value.

    摘要翻译： 用于对视频数据进行编码的设备包括被配置为存储视频数据的多层比特流的至少一部分的存储器和配置成确定补充增强信息（SEI）消息适用于多于一层 多层视频数据; 确定SEI消息引用具有与多层视频数据的多于一层相关联的多个实例的语法元素; 并将所有多个实例设置为相同的值。