公开(公告)号：WO2017100323A1

公开(公告)日：2017-06-15

申请号：PCT/US2016/065382

申请日：2016-12-07

Applicant: GOOGLE INC.

Inventor： CONVERSE, Alexander Jay

IPC: H04N19/91 ,  H04N19/13 ,  H04N19/169

CPC classification number: H04N19/645 ,  H04N19/124 ,  H04N19/13 ,  H04N19/1887 ,  H04N19/44 ,  H04N19/91

Abstract: Decoding encoded transform coefficients of a current block includes initializing a decoder state of a state machine having Boolean and symbol ANS decoders. The decoder state includes an ANS state and a buffer position within a buffer storing a variable string including the encoded transform coefficients. The transform coefficients are sequentially produced from the variable string using the state machine by processing a binary flag/bit using the Boolean ANS decoder and processing a token using the symbol ANS decoder. Each decoder performs state normalization when the ANS state is outside a valid state range, performs output computation to generate an output value for the binary flag/bit or token using the ANS state, and updates the ANS state using the output value and the probability as inputs. The decoder state evolution operations may be different. An encoder state machine having Boolean and symbol ANS encoders is also described.

Abstract translation: 解码当前块的编码变换系数包括初始化具有布尔和符号ANS解码器的状态机的解码器状态。 解码器状态包括ANS状态和存储包括编码变换系数的可变串的缓冲器内的缓冲器位置。 通过使用布尔ANS解码器处理二进制标志/位并使用符号ANS解码器处理令牌，使用状态机从变量串顺序产生变换系数。 每个解码器在ANS状态在有效状态范围之外时执行状态归一化，使用ANS状态执行输出计算以生成二进制标记/位或令牌的输出值，并且使用输出值和概率更新ANS状态作为 投入。 解码器状态演化操作可能不同。 还描述了具有布尔和符号ANS编码器的编码器状态机。

公开(公告)号：WO2016064862A1

公开(公告)日：2016-04-28

申请号：PCT/US2015/056442

申请日：2015-10-20

Applicant: GOOGLE INC.

Inventor： GRANGE, Adrian William ,  CONVERSE, Alexander Jay ,  MUKHERJEE, Debargha ,  ADAMS, Riley ,  BANKOSKI, Jim ,  RUSSELL, Andrew Ian

IPC: H04N19/44 ,  H04N19/107

CPC classification number: H04N19/167 ,  G06T11/00 ,  H04N5/23238 ,  H04N19/105 ,  H04N19/124 ,  H04N19/593 ,  H04N19/597

Abstract: A method for encoding a spherical video is disclosed. The method includes mapping a frame of the spherical video to a two dimensional representation based on a projection. Further, in a prediction process the method includes determine whether at least one block associated with a prediction scheme is on a boundary of the two dimensional representation, and upon determining the at least one block associated with the prediction scheme is on the boundary, select an adjacent end block as a block including at least one pixel for use during the prediction process, the adjacent end block being associated with two or more boundaries of the two dimensional representation.

Abstract translation: 公开了一种用于编码球面视频的方法。 该方法包括基于投影将球面视频的帧映射到二维表示。 此外，在预测处理中，该方法包括确定与预测方案相关联的至少一个块是否在二维表示的边界上，并且在确定与预测方案相关联的至少一个块在边界上时，选择 相邻端块作为包括在预测处理期间使用的至少一个像素的块，相邻端块与二维表示的两个或更多个边界相关联。

公开(公告)号：EP3210379A1

公开(公告)日：2017-08-30

申请号：EP15853542.7

申请日：2015-10-20

Applicant: Google Inc.

Inventor： GRANGE, Adrian William ,  CONVERSE, Alexander Jay ,  MUKHERJEE, Debargha ,  ADAMS, Riley ,  BANKOSKI, Jim ,  RUSSELL, Andrew Ian

IPC: H04N19/44 ,  H04N19/107

CPC classification number: H04N19/167 ,  G06T11/00 ,  H04N5/23238 ,  H04N19/105 ,  H04N19/124 ,  H04N19/593 ,  H04N19/597

Abstract: A method for encoding a spherical video is disclosed. The method includes mapping a frame of the spherical video to a two dimensional representation based on a projection. Further, in a prediction process the method includes determine whether at least one block associated with a prediction scheme is on a boundary of the two dimensional representation, and upon determining the at least one block associated with the prediction scheme is on the boundary, select an adjacent end block as a block including at least one pixel for use during the prediction process, the adjacent end block being associated with two or more boundaries of the two dimensional representation.

Abstract translation: 公开了一种用于编码球形视频的方法。 该方法包括基于投影将球形视频的帧映射到二维表示。 此外，在预测过程中，该方法包括确定与预测方案相关联的至少一个块是否在二维表示的边界上，并且在确定与预测方案相关联的至少一个块位于边界上时，选择 相邻结束块作为包括在预测过程期间使用的至少一个像素的块，相邻结束块与二维表示的两个或更多个边界相关联。