-
公开(公告)号：US12003718B2
公开(公告)日：2024-06-04
申请号：US17437779
申请日：2020-03-05
IPC分类号： H04N19/119 , H04N19/136 , H04N19/176 , H04N19/70
CPC分类号： H04N19/119 , H04N19/136 , H04N19/176 , H04N19/70
摘要： A method for decoding a picture from a bitstream. The method includes decoding a tile partition structure from one or more syntax elements in the bitstream. The method includes determining a number of tiles N in the picture. The method includes decoding a number of partitions in the picture, wherein each partition comprises an integer number of tiles. The method includes deriving a size and/or location for a current partition, wherein deriving the size and/or location for the current partition comprises: decoding one or more location syntax elements for the current partition from the bitstream, deriving a top-left position of the current partition as a location of a first tile in raster scan order that is not included in one or more previously derived partition, and deriving the size and/or the location of the current partition from a value of the one or more location syntax element together with a size and/or location of the one or more previously derived partition. The method includes using the derived size and/or location to decode the picture.
-
公开(公告)号：US20230283774A1
公开(公告)日：2023-09-07
申请号：US18118481
申请日：2023-03-07
IPC分类号： H04N19/119 , H04N19/159 , H04N19/176 , H04N19/169
CPC分类号： H04N19/119 , H04N19/159 , H04N19/176 , H04N19/1883
摘要： A method for decoding a picture from a bitstream. The picture comprising a number of units, and the picture being partitioned into a number of spatial segments by a partition structure. The method includes decoding one or more code words in the bitstream; determining that the partition structure is uniform based on the one or more code words; determining the number of spatial segments based on the one or more code words; determining a segment unit size; and deriving the sizes and/or locations for spatial segments in the picture from the one or more code words. Deriving the sizes and/or locations for spatial segments in the picture comprises a first loop over the number of spatial segments in a first dimension or direction. A number of remaining segment units in the first dimension or direction to be segmented is calculated inside the first loop.
-
公开(公告)号：US20230097014A1
公开(公告)日：2023-03-30
申请号：US18075686
申请日：2022-12-06
IPC分类号： H04N19/119 , H04N19/11 , H04N19/124 , H04N19/172 , H04N19/174 , H04N19/463 , H04N19/593
摘要： An encoder, a decoder, and methods for partitioning a picture from a sequence of video pictures into a layout having a plurality of flexible tiles or segments is disclosed. Each tile or segment comprises a single rectangular or square region. The encoder generates a partition structure and encodes the tiles according to the partition structure. The encoder also generates a bitstream comprising a plurality of coded segments and information indicating the partition structure used to partition the picture into the plurality of flexible tiles or segments, and sends the bitstream to the decoder. Upon receipt, the decoder uses the coded segments and information in the bitstream to decode the plurality of coded segments.
-
公开(公告)号：US11582488B2
公开(公告)日：2023-02-14
申请号：US17532328
申请日：2021-11-22
IPC分类号： H04N19/70 , H04N19/174 , H04N19/46 , H04N19/169
摘要： A method performed by a decoder for decoding a bitstream comprising a picture parameter set, PPS, and a first set of slices. The method includes obtaining the picture parameter set. The method also includes decoding a syntax element included in the picture parameter set to obtain an indicator value. The decoder is configured such that if the indicator value is set to a first value then the decoder determines that a picture header included in the bitstream comprises a parameter value corresponding to a particular parameter, otherwise the decoder determines that each slice included in the first set of slices comprises a parameter value corresponding to the particular parameter. If the picture header comprises the parameter value corresponding to the particular parameter, then this parameter value is used to decode slice data of each slice included in the first set of slices.
-
公开(公告)号：US11477470B2
公开(公告)日：2022-10-18
申请号：US16957527
申请日：2019-10-02
IPC分类号： H04N9/44 , H04N19/44 , H04N19/597
摘要： An encoder and a decoder are provided for encoding, and decoding pictures, respectively. The encoder defines a structure for a picture segment by dividing the picture into multiple picture segment groups and assigning a unique group ID to each group. Each picture segment group is further divided into one or more picture segments or “tiles,” with each picture segment being assigned the ID of its picture segment group. The encoder then encodes the picture segments of the picture segment groups into a bit stream, and sends the bit stream to the decoder. Upon receiving the bit stream, the decoder extracts each picture segment group as a single entity and decodes the picture segments in each picture segment group in a predetermined order.
-
公开(公告)号：US11265542B2
公开(公告)日：2022-03-01
申请号：US17193433
申请日：2021-03-05
IPC分类号： H04N19/119 , H04N19/122 , H04N19/167 , H04N19/172 , H04N19/176 , H04N19/70 , H04N19/96
摘要： Method for decoding a picture, comprising: decoding information that the picture is partitioned into more than one segment based on one or more syntax elements in a bitstream; decoding information that the spatial segmentation is uniform based on the one or more syntax elements; determining a segment unit size based on the one or more syntax elements or based on a predefined segment unit size; decoding a first value indicating a segment width from one or more code words in the bitstream; decoding a second value indicating a segment height from the one or more code words; deriving segment column widths based on a picture width in number of segment units and the first value; deriving segment row heights based on a picture height in number of segment units and the second value; deriving a spatial location for a current block based on the derived segment column widths and the derived segment heights; and decoding the current block based on the derived spatial location.
-
公开(公告)号：US11197029B2
公开(公告)日：2021-12-07
申请号：US17254986
申请日：2020-06-12
IPC分类号： H04N19/70 , H04N19/174 , H04N19/46 , H04N19/169
摘要： A method (400) performed by a decoder (260, 600, 701) for decoding a bitstream comprising a picture parameter set, PPS, and a first set of slices. The method includes obtaining (s402) the picture parameter set. The method also includes decoding (s404) a syntax element included in the picture parameter set to obtain an indicator value. The decoder is configured such that if the indicator value is set to a first value then the decoder determines that a picture header included in the bitstream comprises a parameter value corresponding to a particular parameter, otherwise the decoder determines that each slice included in the first set of slices comprises a parameter value corresponding to the particular parameter. If the picture header comprises the parameter value corresponding to the particular parameter, then this parameter value is used to decode slice data of each slice included in the first set of slices.
-
公开(公告)号：US11032575B2
公开(公告)日：2021-06-08
申请号：US16720510
申请日：2019-12-19
IPC分类号： H04N19/00 , H04N19/70 , H04N19/164 , H04N19/176 , H04N19/107 , H04N19/132 , H04N19/58 , H04N21/845 , H04N19/31 , H04N19/44 , H04N19/593 , H04N21/6379 , H04N19/114
摘要： The present embodiments introduce a new type of random access point in video bitstreams that can be used for random access operations but can be represented in encoded form at a lower bit-cost as compared to IRAP pictures. The random access point is a dependent random access point (DRAP) picture that is encoded and decoded using an IRAP picture as sole reference picture for the DRAP picture. The DRAP picture is encoded as a trailing picture that may be used for reference and constitutes a random access point in a video bitstream.
-
公开(公告)号：US20210152828A1
公开(公告)日：2021-05-20
申请号：US17254646
申请日：2019-06-20
IPC分类号： H04N19/119 , H04N19/167 , H04N19/174 , H04N19/463 , H04N19/172 , H04N19/159 , H04N19/124 , H04N19/593 , H04N19/184 , H04N19/96
摘要： An encoder (400), a decoder (450), and methods (230, 30) for partitioning a picture from a sequence of video pictures into a layout having a plurality of flexible tiles or segments is disclosed. Each tile or segment (T) comprises a single rectangular or square region. The encoder generates (22) a partition structure and encodes (28) the tiles according to the partition structure. The encoder also generates a bitstream (12) comprising a plurality of coded picture segments and information indicating the partition structure used to partition the picture into the plurality of flexible tiles or segments, and sends (29) the bitstream to the decoder. Upon receipt, the decoder uses the coded picture segments and information in the bitstream to decode (38) the plurality of coded picture segments.
-
公开(公告)号：US20210058633A1
公开(公告)日：2021-02-25
申请号：US16957527
申请日：2019-10-02
IPC分类号： H04N19/44 , H04N19/597
摘要： An encoder and a decoder are provided for encoding, and decoding pictures, respectively. The encoder defines a structure for a picture segment by dividing the picture into multiple picture segment groups and assigning a unique group ID to each group. Each picture segment group is further divided into one or more picture segments or “tiles,” with each picture segment being assigned the ID of its picture segment group. The encoder then encodes the picture segments of the picture segment groups into a bit stream, and sends the bit stream to the decoder. Upon receiving the bit stream, the decoder extracts each picture segment group as a single entity and decodes the picture segments in each picture segment group in a predetermined order.
-
-
-
-
-
-
-
-
-
搜索结果
65 条记录 (耗时 0.026 秒)
