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1. 发明公开

US20240205439A1 INDEPENDENT SUBPICTURE FILM GRAIN 审中-公开
公开(公告)号：US20240205439A1
公开(公告)日：2024-06-20
申请号：US18572272
申请日：2022-06-10
申请人： Telefonaktiebolaget LM Ericsson (publ)
发明人： Rickard SJÖBERG , Martin PETTERSSON , Mitra DAMGHANIAN
IPC分类号： H04N19/44 , H04N19/17
CPC分类号： H04N19/44 , H04N19/17
摘要： According to one aspect, a method is provided for applying film grain to a picture decoded from a bitstream. The method includes decoding region information from syntax elements in the bitstream. The method includes deriving, based on the region information, a number of regions in the picture, wherein the number of regions is at least two. The method includes deriving, based on the region information, a region raster-scan order for a first region of the at least two regions. The method includes decoding the first region, wherein the decoding of the first region comprises applying film grain to the first region in accordance with the region raster-scan order.

2. 发明公开

US20240064322A1 PICTURE HEADER PRESENCE 审中-公开
公开(公告)号：US20240064322A1
公开(公告)日：2024-02-22
申请号：US18238728
申请日：2023-08-28
申请人： Telefonaktiebolaget LM Ericsson (publ)
发明人： Rickard SJÖBERG , Martin PETTERSSON , Mitra DAMGHANIAN
IPC分类号： H04N19/46 , H04N19/174 , H04N19/169 , H04N19/70
CPC分类号： H04N19/46 , H04N19/174 , H04N19/188 , H04N19/70
摘要： A method for decoding a picture from a bitstream. In one embodiment, The method includes: receiving a slice header for a slice of the picture, wherein the slice header comprises a state syntax element; decoding a state value from the state syntax element in the slice header, wherein a) if the state value is not equal to a first value, then the state value indicates that i) the bitstream includes for the picture a picture header comprising a set of picture syntax elements and ii) the slice header does not comprise the set of picture syntax elements and b) if the state value is equal to the first value, then the state value indicates that i) the slice header contains said set of picture syntax elements and ii) the bitstream does not include a picture header for the picture; and using the set of picture syntax elements to decode the slice of the picture.

3. 发明公开

US20230179803A1 VIRTUAL BOUNDARY SIGNALING 审中-公开
公开(公告)号：US20230179803A1
公开(公告)日：2023-06-08
申请号：US17916488
申请日：2021-03-30
申请人： Telefonaktiebolaget LM Ericsson (publ)
发明人： Mitra DAMGHANIAN , Martin PETTERSSON , Rickard SJÖBERG , Zhi ZHANG , Jack ENHORN , Ruoyang YU , Jacob STRÕM
IPC分类号： H04N19/70 , H04N19/46 , H04N19/172
CPC分类号： H04N19/70 , H04N19/46 , H04N19/172
摘要： A method for decoding a picture comprising a virtual boundary from a coded video bitstream. The method includes determining one or more of a maximum picture width or a maximum picture height from one or more syntax elements S1 in the coded video bitstream and determining one or more of a current picture width or a current picture height from one or more syntax elements S2 in the coded video bitstream. The method also includes determining that a virtual boundary syntax element in the coded video bitstream is encoded with a bit length derived from (i) one or more of the maximum picture width or the maximum picture height or (ii) one or more of the current picture width or the current picture height. The method also includes deriving the bit length for the virtual boundary syntax element based on (i) the one or more of the maximum picture width or maximum picture height as a result of determining that a virtual boundary syntax element in the coded video bitstream is encoded with a bit length derived from one or more of the maximum picture width or the maximum picture height or (ii) the one or more of the current picture width or the current picture height as a result of determining that a virtual boundary syntax element in the coded video bitstream is derived from one or more of the current picture width or the current picture height. The method also includes decoding the virtual boundary syntax element from the bitstream based on the derived bit length and determining a spatial picture position of the virtual boundary based on the decoded virtual boundary syntax element.

4. 发明申请

US20230137221A1 DECODING BASED ON BI-DIRECTIONAL PICTURE CONDITION 有权
公开(公告)号：US20230137221A1
公开(公告)日：2023-05-04
申请号：US17907704
申请日：2021-03-30
申请人： Telefonaktiebolaget LM Ericsson (publ)
发明人： Martin PETTERSSON , Ruoyang YU , Rickard SJÖBERG , Mitra DAMGHANIAN , Zhi ZHANG , Jack ENHORN
IPC分类号： H04N19/70 , H04N19/169 , H04N19/159
摘要： A methods and apparatuses for encoding or decoding a segment in a coded picture. The decoding may include obtaining from a bitstream a value of a first codeword that indicates whether the coded picture may contain bi-directional inter coded segments or not. The decoding may include, based on the value of the first codeword, deriving one or more parameter values by either (a) decoding one or more parameters from the bitstream to obtain the one or more parameter values or (b) inferring the one or more parameter values. The decoding may include decoding the segment in the coded picture based on the one or more parameter values. The encoding may include encoding the first codeword to the bitstream and determining whether to encode one or more parameter values in the bitstream based on a determination of whether the coded picture will contain bi-directional inter coded segments or not.

5. 发明申请

US20210144384A1 METHODS PROVIDING ENCODING AND/OR DECODING OF VIDEO USING A SYNTAX INDICATOR AND PICTURE HEADER 有权
公开(公告)号：US20210144384A1
公开(公告)日：2021-05-13
申请号：US16640908
申请日：2019-12-10
申请人： Telefonaktiebolaget LM Ericsson (publ)
发明人： Rickard SJÖBERG , Mitra DAMGHANIAN , Martin PETTERSSON
IPC分类号： H04N19/132 , H04N19/70 , H04N19/46 , H04N19/169 , H04N19/174
摘要： There are provided mechanisms for processing encoded image data. The method comprises receiving an encoded bitstream comprising parameter set information. The parameter set information may comprise a syntax indicator, a first coded portion comprising first coded sample information for a picture and a second coded portion comprising second coded sample information for the picture. The method further comprises, responsive to a first value of the syntax indicator, decoding the first coded sample information using a picture header syntax element from a picture header of the encoded bitstream. The method further comprises, responsive to the first value of the syntax indicator, decoding the second coded sample information using the picture header syntax element from the picture header of the encoded bitstream.

6. 发明申请

US20190335179A1 DECODED PICTURE BUFFER MANAGEMENT FOR HANDLING CROSS-PICTURE DATA PREDICTION 审中-公开
公开(公告)号：US20190335179A1
公开(公告)日：2019-10-31
申请号：US16474916
申请日：2017-12-11
申请人： Telefonaktiebolaget LM Ericsson (publ)
发明人： Rickard SJÖBERG , Martin PETTERSSON
IPC分类号： H04N19/132 , H04N19/105 , H04N19/46 , H04N19/172
摘要： Data that is predicted across pictures in a video sequence is managed by separating the data into multiple data types. Instead of keeping all data associated with a decoded picture, such as picture sample values and motion vector data, data associated with a decoded picture is split by data type to enable storing only a subset of all data associated with a decoded picture.

7. 发明申请

US20180376143A1 ENCODING OF PICTURES IN A VIDEO 审中-公开
公开(公告)号：US20180376143A1
公开(公告)日：2018-12-27
申请号：US15777815
申请日：2016-11-28
申请人： Telefonaktiebolaget LM Ericsson (publ)
发明人： Kenneth ANDERSSON , Per HERMANSSON , Martin PETTERSSON , Jonatan SAMUELSSON , Jacob STRÖM
IPC分类号： H04N19/126 , H04N19/196 , H04N19/172
摘要： There are provided mechanisms for encoding a picture of a video sequence in a video bitstream. The picture comprises a first block of samples, wherein each sample in the first block of samples has sample values associated with at least a luma color component and a chroma color component. Each color component is assigned a first quantization parameter. The method comprises calculating a quantization parameter change for at least one color component in the first block of samples, with respect to the first quantization parameter, based on statistics calculated from the sample values from at least one color component in a second block of samples. The second block of samples is one of: source samples of the first block of samples and source samples larger than the first block of samples including the first block of samples. The method comprises quantizing at least one transform coefficient of a residual for the at least one color component in the first block of samples with a second quantization parameter, wherein the second quantization parameter is equal to the sum of the first quantization parameter and the quantization parameter change for the at least one color component. The method comprises signaling the quantization parameter change for the at least one color component to a decoder.

8. 发明申请

US20170302920A1 METHODS, ENCODERS AND DECODERS FOR CODING OF VIDEO SEQUENCING 审中-公开
公开(公告)号：US20170302920A1
公开(公告)日：2017-10-19
申请号：US15512203
申请日：2014-09-19
申请人： TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
发明人： Martin PETTERSSON , Usman HAKEEM , Jonatan SAMUELSSON , Per WENNERSTEN
IPC分类号： H04N19/105 , H04N19/157 , H04N19/147 , H04N19/172 , H04N19/109
CPC分类号： H04N19/105 , H04N19/109 , H04N19/132 , H04N19/147 , H04N19/157 , H04N19/159 , H04N19/172 , H04N19/176 , H04N19/18 , H04N19/184 , H04N19/186 , H04N19/19 , H04N19/30 , H04N19/587 , H04N19/70 , H04N19/85
摘要： Methods, encoders (110) and decoders (120) for encoding frames of a video sequence into an encoded representation of the video sequence are disclosed. The encoder (110) encodes (203) frames into a first set of encoded units, while specifying at least one residual parameter in one or more of the first set of encoded units. The encoder (110) encodes (204) frames into a second set of encoded units, while refraining from specifying the at least one residual parameter. The encoder (110) encodes (203) frames into a first set of encoded units, wherein each frame has a first level of fidelity. The encoder (110) encodes (204) frames into a second set of encoded units, wherein each frame has a second level of fidelity, wherein the second level is less than the first level. The decoder (120) decodes (212, 213), while obtaining a first or a second level of fidelity for each frame. When the second level is less than the first level, the decoder (120) enhances (216) a second set of frames towards obtaining the first level of fidelity for each frame of the second set. Corresponding computer programs and carriers therefor are also disclosed.

9. 发明申请

US20170238011A1 Methods and Devices For Encoding and Decoding Video Pictures 审中-公开
公开(公告)号：US20170238011A1
公开(公告)日：2017-08-17
申请号：US15027749
申请日：2016-02-17
申请人： Telefonaktiebolaget LM Ericsson (publ)
发明人： Martin PETTERSSON , Kenneth ANDERSSON , Per WENNERSTEN
IPC分类号： H04N19/573 , H04N19/159 , H04N19/44 , H04N19/172 , H04N19/30
CPC分类号： H04N19/573 , H04N19/105 , H04N19/159 , H04N19/172 , H04N19/176 , H04N19/30 , H04N19/44 , H04N19/85
摘要： A method (20) is disclosed performed in an encoder (40) for encoding video pictures into a video bit stream, the method (20) comprising: obtaining (21) a transformed version (2′; 12′, 13′) of a reference picture (2; 12, 13), by using a geometric transformation comprising at least one of: scaling, rotation, shearing, reflection, and projection; performing (22) a matching procedure at least once, the matching procedure comprising matching a reference matching area (6; 15, 16) of the reference picture (2; 12, 13) to a matching area (4; 16, 15) of a second picture (1; 13, 12) and matching a reference matching area (6′; 15′, 16′) of the transformed version (2′; 12′, 13′) to the matching area (4; 16, 15) of the second picture (1; 13, 12); and encoding (23) a block (3; 14) of the current picture (1; 11) by selecting for the block (3; 14) a first prediction area (5; 15, 16) based on the reference matching area (6; 15, 16) or a second prediction area (5′; 15′, 16′) based on the transformed reference matching area (6′; 15′, 16′), wherein the first and second prediction areas at least partly overlap the respective reference matching areas (6; 6′; 15, 16, 15′, 16′) and wherein the prediction area having lowest matching error to a corresponding matching area (4; 15, 16) of the second picture (1; 13, 12) is selected as prediction for the block. A corresponding method (30) in a decoder (50) is disclosed, and encoder (40), decoder (50), computer programs and computer program products.

10. 发明公开

US20240292003A1 APPLYING AN OVERLAY PROCESS TO A PICTURE 审中-公开
公开(公告)号：US20240292003A1
公开(公告)日：2024-08-29
申请号：US18572999
申请日：2022-06-20
申请人： Telefonaktiebolaget LM Ericsson (publ)
发明人： Mitra DAMGHANIAN , Martin PETTERSSON , Rickard SJÖBERG
IPC分类号： H04N19/172 , H04N19/167 , H04N19/169 , H04N19/70 , H04N19/85
CPC分类号： H04N19/172 , H04N19/167 , H04N19/188 , H04N19/70 , H04N19/85
摘要： A method for applying an overlay process to a picture in a bitstream. In one embodiment the method includes decoding a first set of one or more overlay process parameters from syntax elements in the bitstream, the first set of one or more overlay process parameters specifying a first overlay process. The method also includes decoding a first set of one or more picture partitioning parameters from syntax elements in the bitstream, the first set of one or more picture partitioning parameters specifying a first segment area of the picture, wherein a boundary of the first segment area of the picture is not fully aligned with a boundary of the picture or a boundary of any subpictures of the picture or a boundary of any slices in the picture. The method further includes decoding the picture, wherein decoding the picture comprises applying the first overlay process on the first segment area of the picture using the first set of one or more overlay process parameters.

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