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11. 发明申请

WO2021239085A1 REFERENCE PICTURE LIST SIGNALING IN VIDEO CODING 审中-公开
公开(公告)号：WO2021239085A1
公开(公告)日：2021-12-02
申请号：PCT/CN2021/096592
申请日：2021-05-28
申请人： BEIJING BYTEDANCE NETWORK TECHNOLOGY CO., LTD. , BYTEDANCE INC.
发明人： DENG, Zhipin , ZHANG, Li
IPC分类号： H04N19/70 , H04N19/58
摘要： Methods, systems, apparatus for video processing are described. The processing may include encoding, decoding or transcoding. One example video processing method includes performing a conversion between a video and a bitstream of the video according to a rule, and wherein the rule specifies that a syntax field is included to specify whether a reference picture list information is present or not in a video unit level of an instantaneous decoding refresh picture.

12. 发明申请

WO2021058401A1 PREDICTION FOR VIDEO ENCODING AND DECODING USING EXTERNAL REFERENCE 审中-公开
公开(公告)号：WO2021058401A1
公开(公告)日：2021-04-01
申请号：PCT/EP2020/076193
申请日：2020-09-18
申请人： INTERDIGITAL VC HOLDINGS FRANCE, SAS
发明人： BORDES, Philippe , DOYEN, Didier , GALPIN, Franck , KERDRANVAT, Michel
IPC分类号： H04N19/105 , H04N19/172 , H04N19/58 , H04N19/597 , H04N19/70
摘要： Various embodiments relate to a video coding system in which some elements required for decoding are generated according to a process that not specified within the video coding system. This process is hereafter referenced to as being the "external" process. This external process may generate "external" reference pictures to be used by a decoder that is adapted to use these external pictures. Encoding method, decoding method, encoding apparatus, decoding apparatus based on this post-processing method are proposed.

13. 发明申请

WO2021052500A1 视频图像的传输方法、发送设备、视频通话方法和设备审中-公开
公开(公告)号：WO2021052500A1
公开(公告)日：2021-03-25
申请号：PCT/CN2020/116541
申请日：2020-09-21
申请人：华为技术有限公司
发明人：周旭升 , 卢宇峰
IPC分类号： H04N19/58
摘要：本申请实施例提供一种视频图像的传输方法、发送设备、视频通话方法和设备，上述视频图像包括多个视频帧，上述视频图像的传输方法中，对上述多个视频帧进行编码，得到经编码的码流，所述码流至少包括表示帧间参考关系的信息。本申请中，当前帧的前N帧中的每一帧均参考与本帧时域距离最近的前向LTR帧，上述前向LTR帧为发送端设备标记为LTR帧的已编码的视频帧，也就是说，本实施例中，发送端设备在标记LTR帧时，无需等待接收端设备的反馈，因此可以实现一个RTT内标记多个LTR帧，从而可以大大缩短帧间参考距离，提升视频图像的编码质量。

14. 发明申请

WO2020060803A1 TECHNIQUES FOR SIMPLIFIED AFFINE MOTION MODEL CODING WITH PREDICTION OFFSETS 审中-公开
公开(公告)号：WO2020060803A1
公开(公告)日：2020-03-26
申请号：PCT/US2019/050428
申请日：2019-09-10
申请人： TENCENT AMERICA LLC.
发明人： LI, Guichun , XU, Xiaozhong , LI, Xiang , LIU, Shan
IPC分类号： H04N19/17 , H04N19/42 , H04N19/51 , H04N19/52 , H04N19/58 , G06T7/20
摘要： In a method for video decoding in a decoder, prediction information of a block is decoded in a current picture from a coded video bitstream. The prediction information includes a plurality of offset indices for prediction offsets associated with an affine model in an inter prediction mode. The plurality of offset indices includes at least one of a distance offset index, an offset direction index, a delta scaling index, and a delta rotation index. Further, parameters of the affine model are determined based on the plurality of offset indices. Each of the plurality of the offset indices including a respective pre-defined mapping table that includes indexes and corresponding offset values. The parameters of the affine model are used to transform between the block and a reference block in a reference picture that has been reconstructed. At least a sample of the block is reconstructed according to the affine model.

15. 发明申请

WO2018122092A1 METHODS, APPARATUS, AND COMPUTER PROGRAMS FOR DECODING MEDIA 审中-公开
公开(公告)号：WO2018122092A1
公开(公告)日：2018-07-05
申请号：PCT/EP2017/084050
申请日：2017-12-21
申请人： TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
发明人： SJÖBERG, Rickard , PETTERSON, Martin , ANDERSSON, Kenneth , STRÖM, Jacob , SAMUELSSON, Jonatan
IPC分类号： H04N19/70 , H04N19/196 , H04N19/463 , H04N19/174 , H04N19/573 , H04N19/58 , H04N19/105
CPC分类号： H04N19/58 , H04N19/105 , H04N19/174 , H04N19/196 , H04N19/463 , H04N19/573 , H04N19/70
摘要： The disclosure provides methods, apparatus and compute programs for decoding media. One method, performed by a decoder, for predicting parameter values from a previously decoded reference picture to a current slice of a current picture or current slice of a current picture, comprises: receiving an encoded representation of the current picture or slice of a video sequence from an encoder; identifying a set of previously decoded reference pictures or slices for the current picture or slice; creating an ordered list of indicators pointing to one or more previously decoded reference pictures or slices belonging to the set; determining, from the list, a previously decoded reference picture or slice to use for prediction; deriving final parameter values by predicting parameter values using the determined reference picture or slice; and decoding the current picture or slice from the encoded representation, using the final parameter values.

16. 发明申请

WO2017062373A1 METHODS AND SYSTEMS OF CODING A PREDICTIVE RANDOM ACCESS PICTURE USING A BACKGROUND PICTURE 审中-公开
标题翻译：使用背景图片编码预测随机访问图像的方法和系统
公开(公告)号：WO2017062373A1
公开(公告)日：2017-04-13
申请号：PCT/US2016/055360
申请日：2016-10-04
申请人： QUALCOMM INCORPORATED
发明人： CHEN, Ying , YANG, Ruiduo , BI, Ning
IPC分类号： H04N19/105 , H04N19/176 , H04N19/70 , H04N19/46 , H04N19/162 , H04N19/58
CPC分类号： H04N19/159 , H04N19/105 , H04N19/162 , H04N19/172 , H04N19/176 , H04N19/46 , H04N19/58 , H04N19/70
摘要： Techniques and systems are provided for encoding video data. For example, a method of encoding video data includes obtaining a background picture that is generated based on a plurality of pictures captured by an image sensor. The background picture is generated to include background portions identified in each of the captured pictures. The method further includes encoding, into a video bitstream, a group of pictures captured by the image sensor. The group of pictures includes at least one random access picture. Encoding the group of pictures includes encoding at least a portion of the at least one random access picture using inter-prediction based on the background picture.
摘要翻译：提供了用于编码视频数据的技术和系统。例如，编码视频数据的方法包括获得基于由图像传感器捕获的多个图像生成的背景图像。生成背景图像以包括在每个捕获的图像中识别的背景部分。该方法还包括将图像传感器捕获的一组图像编码到视频比特流中。该组图片包括至少一个随机存取图象。编码图像组包括使用基于背景图像的帧间预测对至少一个随机接入图像的至少一部分进行编码。

17. 发明申请

WO2015196025A1 VALUE RANGES FOR SYNTAX ELEMENTS IN VIDEO CODING 审中-公开
标题翻译：视频编码中的语音元素的数值范围
公开(公告)号：WO2015196025A1
公开(公告)日：2015-12-23
申请号：PCT/US2015/036600
申请日：2015-06-19
申请人： QUALCOMM INCORPORATED
发明人： WANG, Ye-kui , RAMASUBRAMONIAN, Adarsh, Krishnan , HENDRY, Fnu
IPC分类号： H04N19/70 , H04N19/573 , H04N19/58 , H04N19/30
CPC分类号： H04N19/52 , H04N19/124 , H04N19/152 , H04N19/172 , H04N19/174 , H04N19/176 , H04N19/182 , H04N19/187 , H04N19/30 , H04N19/573 , H04N19/58 , H04N19/597 , H04N19/70
摘要： Systems and methods for coding video data are disclosed. The method can include determining a reference picture set (RPS) for a current picture based on one or more reference pictures. The method can also include determining a picture order count (POC) value of each reference picture of the RPS and identifying at least one of a number of long-term reference pictures and a number of short-term reference pictures within the RPS. The method can also include applying constraints to the number of long-term pictures and the number of short-term pictures in the RPS, the constraints being based on the POC value and a maximum decoded picture buffer size minus one, if a video sequence parameter (VPS) extension is in use. The method can include generating at least one syntax element identifying the RPS based on the constraints and encoding the current picture based on the at least one syntax element.
摘要翻译：公开了用于编码视频数据的系统和方法。该方法可以包括基于一个或多个参考图片确定当前图片的参考图片集（RPS）。该方法还可以包括确定RPS的每个参考图像的图像顺序计数（POC）值，并且识别RPS内的多个长期参考图像和多个短期参考图像中的至少一个。该方法还可以包括对RPS的长期图像的数量和短期图像的数量应用约束，如果视频序列参数，约束是基于POC值和最大解码图像缓冲器大小减去一个（VPS）扩展正在使用中。该方法可以包括基于约束生成识别RPS的至少一个语法元素，并基于至少一个语法元素对当前图片进行编码。

18. 发明申请

WO2015192989A1 ROBUST ENCODING AND DECODING OF PICTURES IN VIDEO 审中-公开
标题翻译：在视频中强制编码和解码图像
公开(公告)号：WO2015192989A1
公开(公告)日：2015-12-23
申请号：PCT/EP2015/057973
申请日：2015-04-13
申请人： TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)
发明人： PETTERSSON, Martin , SAMUELSSON, Jonatan , SJÖBERG, Rickard , STRÖM, Jacob , YU, Ruoyang
IPC分类号： H04N19/70 , H04N19/107 , H04N19/58
CPC分类号： H04N19/107 , H04N19/132 , H04N19/176 , H04N19/31 , H04N19/44 , H04N19/58 , H04N19/593 , 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 as a temporal predictive picture 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 constitutes a random access point in a video bitstream.
摘要翻译：本实施例在视频比特流中引入了可以用于随机接入操作的新型随机接入点，但是与IRAP图片相比可以以较低的比特成本表示为编码形式。随机接入点是依赖随机接入点（DRAP）图像，其根据解码顺序被编码和解码为使用IRAP图像和/或先前的时间预测图像，DRAP图像作为唯一参考图像， DRAP图片。 DRAP图像构成视频比特流中的随机接入点。

19. 发明申请

WO2015138008A1 CONTINUOUS BLOCK TRACKING FOR TEMPORAL PREDICTION IN VIDEO ENCODING 审中-公开
标题翻译：连续块跟踪在视频编码中进行时间预测
公开(公告)号：WO2015138008A1
公开(公告)日：2015-09-17
申请号：PCT/US2014/063913
申请日：2014-11-04
申请人： EUCLID DISCOVERIES, LLC
发明人： KOTTKE, Dane, P. , GUO, John, J. , LEE, Jeyun , PARK, Sangseok , LEE, Nigel , WEED, Christopher , KWAN, Justin
IPC分类号： H04N19/56 , H04N19/105 , H04N19/139 , H04N19/176 , H04N19/513 , H04N19/527 , H04N19/53 , H04N19/58
CPC分类号： H04N19/56 , H04N19/105 , H04N19/117 , H04N19/139 , H04N19/176 , H04N19/513 , H04N19/517 , H04N19/527 , H04N19/53 , H04N19/58
摘要： Continuous block tracking tracks the locations of input video blocks (macroblocks) over multiple reference frames to produce better inter-predictions than can be found through conventional block-based motion estimation and compensation. The continuous block tracker is comprised of both frame-to-frame tracking, estimating motion from a frame to a previous frame, and continuous tracking, related frame -to-frame motion vectors to specific block tracks. Frame-to-frame tracking may be carried out, for example, using either block based motion estimation or hierarchical motion estimation. The continuous block tracker can be combined with enhanced predictive zonal search to create a unified motion estimation algorithm. Continuous tracking results can be accumulated to form trajectories that can be used to derive trajectory-based continuous block tracker predictions. Metrics that measure the quality of continuous tracks and their associated motion vectors can be used to assess the relative priority of continuous block tracker predictions against non-tracker-based predictions and to modify encoding choices according to the likely scenarios indicated by the metrics. Continuous tracks can be analyzed for goodness-of-fit to translational motion models, with outliers removed from encoding consideration. Translational motion model analysis can be extended to entire frames as part of an adaptive picture type selection algorithm. Outputs from the continuous block tracker can be used in a look-ahead processing module, in the form of look-ahead tracking, to provide rate control information and scene change detection for the current frame being encoded.
摘要翻译：连续块跟踪跟踪多个参考帧上的输入视频块（宏块）的位置，以产生比通过常规的基于块的运动估计和补偿可以发现的更好的相互预测。连续块跟踪器由帧到帧跟踪，估计从帧到先前帧的运动以及连续跟踪，相关的帧到帧运动向量到特定块轨道。可以例如使用基于块的运动估计或分层运动估计来执行帧到帧跟踪。连续块跟踪器可以与增强的预测区域搜索相结合，以创建统一的运动估计算法。可以累积连续跟踪结果以形成可用于导出基于轨迹的连续块跟踪器预测的轨迹。衡量连续轨道质量及其相关运动矢量的度量可用于评估连续块跟踪器预测与非基于跟踪者的预测的相对优先级，并根据指标所指示的可能场景修改编码选择。可以对平移运动模型的适合度进行连续轨迹分析，从编码考虑中删除异常值。作为自适应图像类型选择算法的一部分，平移运动模型分析可以扩展到整个帧。来自连续块跟踪器的输出可以以预先跟踪的形式用在预先处理模块中，以便为正在编码的当前帧提供速率控制信息和场景变化检测。

20. 发明申请

WO2015115644A1 画像符号化装置、画像復号装置、符号化ストリーム変換装置、画像符号化方法、及び画像復号方法审中-公开
标题翻译：图像编码装置，图像解码装置，编码流转换装置，图像编码方法和图像解码方法
公开(公告)号：WO2015115644A1
公开(公告)日：2015-08-06
申请号：PCT/JP2015/052855
申请日：2015-02-02
申请人：三菱電機株式会社
发明人：峯澤　彰 , 関口　俊一 , 守屋　芳美 , 服部　亮史 , 宮澤　一之
IPC分类号： H04N19/70 , H04N19/40 , H04N19/58
CPC分类号： H04N19/51 , H04N19/107 , H04N19/114 , H04N19/172 , H04N19/184 , H04N19/40 , H04N19/43 , H04N19/439 , H04N19/46 , H04N19/503 , H04N19/52 , H04N19/58 , H04N19/70
摘要：　予測画像生成部が、ランダムアクセス可能なインターピクチャを符号化する場合は、複数のランダムアクセス可能なイントラピクチャの中から参照ピクチャを設定し、その設定した参照ピクチャを予測処理に用いる動き補償予測を実施し、可変長符号化部１３が、その参照ピクチャの位置を示すピクチャ位置情報とランダムアクセス可能なインターピクチャがランダムアクセス可能であることを示す識別情報を符号化し、そのピクチャ位置情報及び識別情報の符号化データをビットストリームに多重化する。
摘要翻译：当编码随机访问的帧间图像时，预测图像生成单元从多个可随机访问的帧内图像中设置参考图像，并且在预测处理中执行使用所述设置的参考图像的运动补偿预测。可变长度编码单元（13）编码指示参考图像的图像位置信息和指示可随机访问的帧间图片可随机访问的识别信息，并将图像位置信息和识别信息的编码数据多路复用为比特流。

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