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公开(公告)号：US10484711B2
公开(公告)日：2019-11-19
申请号：US14646718
申请日：2015-04-13
IPC分类号： H04N19/107 , H04N19/58 , H04N19/70 , H04N19/132 , H04N19/176 , H04N19/31 , H04N19/44 , H04N19/593 , H04N19/50 , H04N1/00 , H04N1/413
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：US10404987B2
公开(公告)日：2019-09-03
申请号：US14390154
申请日：2014-08-06
发明人： Jonatan Samuelsson , Jack Enhorn , Rickard Sjöberg
IPC分类号： H04N19/159 , H04N19/597 , H04N19/70 , H04N19/172 , H04N19/30 , H04N19/132 , H04N19/156 , H04N19/162 , H04N19/164 , H04N19/39
摘要： A multi-layer or multi-view video is encoded by encoding one of a picture in a first layer or view and a picture in a second layer or view coinciding at a switching point defining a switch between the first layer or view and the second layer or view. The other of the picture in the first layer or view and the picture in the second layer or view coinciding at the switching point is encoded as a skip picture. The embodiments thereby reduce complexity of encoding and decoding multi-layer or multi-view video having a switching point and reduce the number of bits required for representing encoded pictures coinciding at the switching point.
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公开(公告)号：US09609362B2
公开(公告)日：2017-03-28
申请号：US14891821
申请日：2015-10-02
IPC分类号： H04N19/60 , H04N19/176 , H04N19/70 , H04N19/124 , H04N19/186 , H04N19/157 , H04N19/44
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：US09565434B2
公开(公告)日：2017-02-07
申请号：US14372704
申请日：2013-01-14
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.
摘要翻译： 基于视频序列中的图像的编码表示提供至少一个模式信令语法元素。 采用至少一种模式信令语法元素来确定图片中相同切片类型的所有片段的至少一个最终参考图片列表是否相同。 所述至少一个模式信令语法元素从而向解码器发信号，其不一定必须对图像中的每个切片重复计算复杂的参考图像列表构造功能。
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公开(公告)号：US20150139338A1
公开(公告)日：2015-05-21
申请号：US14398283
申请日：2013-05-03
IPC分类号： H04N19/169 , H04N19/172 , H04N19/89 , H04N19/463
CPC分类号： H04N19/188 , H04N19/107 , H04N19/132 , H04N19/159 , H04N19/172 , H04N19/44 , H04N19/463 , H04N19/70 , H04N19/89 , H04N21/8455
摘要： A method of encoding a video sequence is provided. The method (300) comprises including (301) Network Abstraction Layer (NAL) unit type information with each picture of the video sequence, and identifying (302) a current picture which is a leading picture of exactly one Clean Random Access (CRA) picture. The current picture is identified using the NAL unit type information, e.g., using a specific NAL unit type which is reserved for leading pictures of exactly one CRA picture. Further, a method of decoding a coded video sequence, a method of extracting a sub-bitstream from a coded video sequence, a method of processing a coded video sequence, corresponding computer programs and computer program products, a video encoder, a video decoder, and network elements are provided.
摘要翻译： 提供了一种编码视频序列的方法。 所述方法（300）包括：（301）网络抽象层（NAL）单元类型信息与所述视频序列的每个图像，以及识别（302）当前图像，其是正好一个清洁随机访问（CRA）图像的前导图像 。 使用NAL单元类型信息来识别当前图像，例如使用为正好一个CRA图像的主要图像保留的特定NAL单元类型。 此外，解码编码视频序列的方法，从编码视频序列中提取子比特流的方法，处理编码视频序列的方法，对应的计算机程序和计算机程序产品，视频编码器，视频解码器， 并提供网络元件。
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公开(公告)号：US20140211841A1
公开(公告)日：2014-07-31
申请号：US13818488
申请日：2012-12-21
IPC分类号： H04N19/13 , H04N19/70 , H04N19/174
CPC分类号： H04N19/13 , H04N19/172 , H04N19/174 , H04N19/46 , H04N19/70
摘要： A length indicator (23) associated with an encoded representation (20) of a slice (3) is parsed. The length indicator (23) is indicative of a length of an extension field (24) present in a slice header (21) of the encoded representation (20). A decoder (40) can then determine to ignore, during decoding of the encoded representation (20), any value of the extension field (24) in the slice header (21) where these values are identified based on the length indicator (23). As a consequence, extension fields (23) can be added to slice headers (21) and still enable legacy decoders (40) to correctly decode the encoded representations (20).
摘要翻译： 解析与切片（3）的编码表示（20）相关联的长度指示符（23）。 长度指示符（23）指示存在于编码表示（20）的片标题（21）中的扩展字段（24）的长度。 然后，解码器（40）可以在解码编码表示（20）期间忽略在片头（21）中基于长度指示符（23）识别这些值的扩展字段（24）的任何值， 。 因此，扩展字段（23）可以被添加到片标头（21），并且仍使得传统解码器（40）能够正确地解码编码表示（20）。
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公开(公告)号：US12069298B2
公开(公告)日：2024-08-20
申请号：US18239354
申请日：2023-08-29
IPC分类号： H04N19/58 , H04N19/105 , H04N19/169 , H04N19/174 , H04N19/176 , H04N19/184 , H04N19/423 , H04N19/44 , H04N19/463 , H04N19/503 , H04N19/70
CPC分类号： H04N19/58 , H04N19/105 , H04N19/174 , H04N19/176 , H04N19/184 , H04N19/188 , H04N19/423 , H04N19/44 , H04N19/463 , H04N19/503 , H04N19/70
摘要： An encoder calculates an indication to a previous reference picture having temporal identity of zero. The encoder creates a first set of indicators to the previous reference picture, to all reference pictures in a first reference picture set of the previous reference picture, and to all pictures following the previous reference picture in decoding order and precede the current picture in decoding order. The encoder sets a flag for picture order count cycle, when a long term reference picture (LTRP) has least significant bits (LSBs) of a picture order count, for which more than one picture in the first set share same value of the LSBs of picture order count as the LTRP. The decoder obtains LSB of a picture order count for a LTRP in a reference picture set of the current picture. The decoder concludes non-compliant bitstream based on indications provided by the flag.
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公开(公告)号：US10999600B2
公开(公告)日：2021-05-04
申请号：US16589505
申请日：2019-10-01
IPC分类号： H04N19/58 , H04N19/176 , H04N19/70 , H04N19/463 , H04N19/105 , H04N19/174 , H04N19/184 , H04N19/169 , H04N19/503 , H04N19/423 , H04N19/44
摘要： An encoder calculates an indication to a previous reference picture having temporal identity of zero. The encoder creates a first set of indicators to the previous reference picture, to all reference pictures in a first reference picture set of the previous reference picture, and to all pictures following the previous reference picture in decoding order and precede the current picture in decoding order. The encoder sets a flag for picture order count cycle, when a long term reference picture (LTRP) has least significant bits (LSBs) of a picture order count, for which more than one picture in the first set share same value of the LSBs of picture order count as the LTRP. The decoder obtains LSB of a picture order count for a LTRP in a reference picture set of the current picture. The decoder concludes non-compliant bitstream based on indications provided by the flag.
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公开(公告)号：US10708604B2
公开(公告)日：2020-07-07
申请号：US16127358
申请日：2018-09-11
IPC分类号： H04N7/12 , 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 comprises 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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公开(公告)号：US10306245B2
公开(公告)日：2019-05-28
申请号：US14786116
申请日：2014-06-25
发明人： Rickard Sjöberg , Jonatan Samuelsson , Ruoyang Yu
IPC分类号： H04N19/00 , H04N19/30 , H04N19/597 , H04N19/503 , H04N19/70 , H04N19/46 , H04N19/593 , H04N19/33 , H04N19/31 , H04N19/187 , H04N19/423 , H04N19/44
摘要： A POC recalculation value is retrieved by a decoder from an encoded representation of a RAP picture in a base layer of a video stream comprising pictures in multiple layers. POC values of reference pictures in a DPB of the decoder are recalculated using the POC recalculation value. By signaling the POC recalculation value in the RAP picture, which enables the decoder to correctly handle video streams with non-aligned RAP pictures.
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