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公开(公告)号：US20240357117A1
公开(公告)日：2024-10-24
申请号：US18760826
申请日：2024-07-01
IPC分类号： H04N19/13 , H04N19/172 , H04N19/174 , H04N19/46 , H04N19/70
CPC分类号： H04N19/13 , H04N19/174 , H04N19/46 , H04N19/70 , H04N19/172
摘要： A length indicator associated with an encoded representation of a slice is parsed. The length indicator is indicative of a length of an extension field present in a slice header of the encoded representation. A decoder can then determine to ignore, during decoding of the encoded representation, any value of the extension field in the slice header where these values are identified based on the length indicator. As a consequence, an extension field can be added to slice headers and still enable legacy decoders to correctly decode the encoded representations.
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公开(公告)号：US20220303574A1
公开(公告)日：2022-09-22
申请号：US17832875
申请日：2022-06-06
IPC分类号： H04N19/58 , H04N19/70 , H04N19/107 , H04N19/31 , H04N19/176 , H04N19/132 , H04N19/44 , H04N19/593
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 and/or a previous, according to a decoding order, DRAP picture as sole reference picture(s) 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.
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公开(公告)号：US20240056586A1
公开(公告)日：2024-02-15
申请号：US18495901
申请日：2023-10-27
IPC分类号： H04N19/177 , H04N19/31 , H04N19/573
CPC分类号： H04N19/177 , H04N19/31 , H04N19/573 , H04N19/70
摘要： A method performed by a video encoder for encoding a current picture belonging to a temporal level identified by a temporal_id. The method includes determining a Reference Picture Set (RPS) for the current picture indicating reference pictures that are kept in a decoded picture buffer (DPB) when decoding the current picture, and when the current picture is a temporal switching point. The method further includes operating to ensure that the RPS of the current picture includes no picture having a temporal_id greater than or equal to the temporal_id of the current picture.
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4.发明申请公开(公告)号：US20230089432A1
公开(公告)日：2023-03-23
申请号：US17994586
申请日：2022-11-28
IPC分类号： H04N19/50 , H04N19/70 , H04N19/44 , H04N19/423
摘要： An object of the embodiments is to achieve an improved reference picture handling. That is achieved by taking into account whether the reference pictures in the decoded picture buffer are long-term reference pictures or short-term reference pictures when determining how they should be marked when the information of the reference picture set is received. The reference pictures are marked as “used for short-term reference” or “used for long-term reference” in the Decoded Picture Buffer (DPB) depending on whether they are included as short-term pictures or long-term pictures in the RPS of a current picture.
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公开(公告)号：US20200059666A1
公开(公告)日：2020-02-20
申请号：US16601782
申请日：2019-10-15
IPC分类号： H04N19/58 , H04N19/593 , H04N19/44 , H04N19/132 , H04N19/176 , H04N19/31 , H04N19/107 , H04N19/70
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 and/or a previous, according to a decoding order, DRAP picture as sole reference picture(s) 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.
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公开(公告)号：US20190089988A1
公开(公告)日：2019-03-21
申请号：US15579053
申请日：2016-05-02
IPC分类号： H04N19/85 , H04N19/186 , H04N19/154 , H04N19/12 , H04N19/19
摘要： A pre-processing of a pixel in a picture comprises determining, based on a minimum color component value for the pixel, whether a default processing chain is used to derive a luma component value, a first subsampled chroma component value and a second subsampled chroma component value or whether an auxiliary processing chain is used to derive at least one of the luma component value, the first subsampled chroma component value and the second subsampled chroma component value. The pre-processing improves the visual quality of pictures but at a low cost with regard to extra processing time.
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公开(公告)号：US20180332280A1
公开(公告)日：2018-11-15
申请号：US16041093
申请日：2018-07-20
IPC分类号： H04N19/105 , H04N19/70 , H04N19/46 , H04N19/172 , H04N19/174 , H04N19/51
CPC分类号： H04N19/105 , H04N19/172 , H04N19/174 , H04N19/46 , H04N19/51 , H04N19/70
摘要： At least one mode signaling syntax element is provided based on an encoded representation of a picture in a video sequence. The at least one mode signaling syntax element is employed to determine whether at least one final reference picture list is the same for all slices of a same slice type in the picture. The at least one mode signaling syntax element thereby signals to a decoder that it does not necessarily have to repeat computationally complex reference picture list construction functions for each slice in the picture.
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公开(公告)号：US20180146213A1
公开(公告)日：2018-05-24
申请号：US15579447
申请日：2016-06-03
IPC分类号： H04N19/82 , H04N19/593 , H04N19/186
CPC分类号： H04N19/82 , H04N1/64 , H04N19/117 , H04N19/136 , H04N19/186 , H04N19/51 , H04N19/59 , H04N19/593 , H04N19/85
摘要： It is presented a method for applying a filter on at least one colour component of an input signal used for video processing. The method is performed in a filter device and comprises the steps of: converting the input signal, by applying a first conversion process, to a modified signal, wherein both the input signal and the modified signal are in a spatial domain; filtering the modified signal with a filter, yielding a filtered signal; and converting the filtered signal, by applying a second conversion process, to an output signal, wherein the output signal is in a spatial domain.
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公开(公告)号：US20170150151A1
公开(公告)日：2017-05-25
申请号：US15426689
申请日：2017-02-07
IPC分类号： H04N19/124 , H04N19/46 , H04N19/60
CPC分类号： H04N19/124 , H04N19/157 , H04N19/174 , H04N19/176 , H04N19/184 , H04N19/186 , H04N19/44 , H04N19/46 , H04N19/60 , H04N19/61 , H04N19/70
摘要： QP control information valid for a block of samples is parsed. A QP to use for the block of samples is derived according to a first QP derivation process independent on the QP control information if residual data of the block of samples is not color transformed and according to a second QP derivation process dependent on the QP control information if the residual data of the block of samples is color transformed. The embodiments thereby decouple QP parameters for blocks of samples that are coded with color transform and those that are coded without color transform. This decoupling achieves better flexibility during encoding and results in better visual quality.
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公开(公告)号：US20170104990A1
公开(公告)日：2017-04-13
申请号：US15383451
申请日：2016-12-19
IPC分类号： H04N19/105 , H04N19/70 , H04N19/46
CPC分类号： H04N19/105 , H04N19/172 , H04N19/174 , H04N19/46 , H04N19/51 , H04N19/70
摘要： At least one mode signaling syntax element is provided based on an encoded representation of a picture in a video sequence. The at least one mode signaling syntax element is employed to determine whether at least one final reference picture list is the same for all slices of a same slice type in the picture. The at least one mode signaling syntax element thereby signals to a decoder that it does not necessarily have to repeat computationally complex reference picture list construction functions for each slice in the picture.
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