公开(公告)号：US09392280B1

公开(公告)日：2016-07-12

申请号：US14158958

申请日：2014-01-20

Applicant: Google Inc.

Inventor： James Bankoski ,  Adrian Grange ,  Paul Wilkins

IPC: H04N7/12 ,  H04N19/51

CPC classification number: H04N19/00715 ,  H04N19/105 ,  H04N19/137 ,  H04N19/176 ,  H04N19/573 ,  H04N19/80

Abstract: A current block and a reference frame used to compress the current block are selected from a bitstream. The reference frame has an alternate reference block created by obtaining a preliminary alternate reference block for the current block, obtaining a predictor block that is generated based on a frame other than the current frame, and creating the alternate reference block when the difference between the two predictors is less than a threshold. The alternate reference block is created by using certain blocks from the sequence of frames that are more different from the preliminary alternate reference block than other non-selected blocks. The current block is decoded using the alternate reference block. In this way, a predictor block that is different from a golden frame predictor is made available when an existing alternate reference block is too similar to the golden frame predictor to be useful.

Abstract translation: 从比特流中选择用于压缩当前块的当前块和参考帧。 参考帧具有通过获得当前块的初步备用参考块而获得的替代参考块，获得基于除了当前帧之外的帧生成的预测块，并且当两者之间的差异 预测指标小于阈值。 通过使用与其他未选择的块更加不同于初始替代参考块的帧序列中的某些块来创建替代参考块。 使用备用参考块对当前块进行解码。 以这种方式，当现有的替代参考块与黄金帧预测器太相似时，使得与黄金帧预测器不同的预测块可用。

公开(公告)号：US09838690B1

公开(公告)日：2017-12-05

申请号：US15149283

申请日：2016-05-09

Applicant: GOOGLE INC.

Inventor： Adrian Grange ,  James Bankoski ,  Paul G. Wilkins ,  Yaowu Xu

IPC: H04N19/117 ,  H04N19/103 ,  H04N19/80

CPC classification number: H04N19/117 ,  H04N19/103 ,  H04N19/147 ,  H04N19/80 ,  H04N19/82

Abstract: Disclosed herein are methods and apparatuses for selective prediction signal filtering. One aspect of the disclosed implementations is a method for encoding a frame of a video stream including determining a first performance measurement for a first set of prediction samples identified for a group of pixels using a first prediction mode, generating a filtered set of prediction samples by applying a filter to a second set of prediction samples, wherein at least one of the filtered set of prediction samples or the second set of prediction samples are identified using a second prediction mode, determining a second performance measurement for the filtered set of prediction samples, generating, using a processor, a residual based on the filtered set of prediction samples and the group of pixels if the second performance measurement exceeds the first performance measurement, and encoding the frame using the residual.

公开(公告)号：US09172957B2

公开(公告)日：2015-10-27

申请号：US14195160

申请日：2014-03-03

Applicant: Google Inc.

Inventor： Adrian Grange ,  Paul Wilkins ,  Francis William Galligan

IPC: H04N7/12 ,  H04N19/503 ,  H04N19/61 ,  H04N19/00 ,  H04N19/176 ,  H04N19/86 ,  H04N19/159 ,  H04N19/117 ,  H04N19/194 ,  H04N19/80 ,  H04N19/85 ,  H04N19/40

CPC classification number: H04N19/503 ,  H04N19/117 ,  H04N19/159 ,  H04N19/176 ,  H04N19/194 ,  H04N19/40 ,  H04N19/44 ,  H04N19/61 ,  H04N19/63 ,  H04N19/80 ,  H04N19/85

Abstract: Implementations of the teachings herein include coding video data with an alternate reference frame generated using a temporal filter. The alternate reference frame is generated by determining a first weighting factor, for each corresponding block of a respective frame of a filter set, that represents a temporal correlation of the block with the corresponding block, determining a second weighting factor, for each pixel for each corresponding block of the respective frame of the filter set, that represents a temporal correlation of the pixel to a spatially-correspondent pixel in the block, determining a filter weight for each pixel in the block and for each spatially-correspondent pixel is each corresponding block based on the first weighting factor and the second weighting factor, and generating a weighted average pixel value for each pixel position in the block to form a block of the alternate reference frame based on the filter weights.

Abstract translation: 这里的教导的实现包括使用时间滤波器生成的替代参考帧对视频数据进行编码。 通过为滤波器组的相应帧的每个相应块确定第一加权因子来生成替代参考帧，该第一加权因子表示该块与相应块的时间相关性，为每个像素确定每个像素的第二加权因子 滤波器组的相应帧的相应块，其表示像素与块中的空间相应像素的时间相关性，确定块中每个像素和每个空间相应像素的滤波器权重分别是对应块 基于第一加权因子和第二加权因子，并且为块中的每个像素位置生成加权平均像素值，以基于滤波器权重形成替代参考帧的块。

公开(公告)号：US20140177714A1

公开(公告)日：2014-06-26

申请号：US14195160

申请日：2014-03-03

Applicant: Google Inc.

Inventor： Adrian Grange ,  Paul Wilkins ,  Francis William Galligan

IPC: H04N19/503

CPC classification number: H04N19/503 ,  H04N19/117 ,  H04N19/159 ,  H04N19/176 ,  H04N19/194 ,  H04N19/40 ,  H04N19/44 ,  H04N19/61 ,  H04N19/63 ,  H04N19/80 ,  H04N19/85

Abstract: Implementations of the teachings herein include coding video data with an alternate reference frame generated using a temporal filter. The alternate reference frame is generated by determining a first weighting factor, for each corresponding block of a respective frame of a filter set, that represents a temporal correlation of the block with the corresponding block, determining a second weighting factor, for each pixel for each corresponding block of the respective frame of the filter set, that represents a temporal correlation of the pixel to a spatially-correspondent pixel in the block, determining a filter weight for each pixel in the block and for each spatially-correspondent pixel is each corresponding block based on the first weighting factor and the second weighting factor, and generating a weighted average pixel value for each pixel position in the block to form a block of the alternate reference frame based on the filter weights.

Abstract translation: 这里的教导的实现包括使用时间滤波器生成的替代参考帧对视频数据进行编码。 通过为滤波器组的相应帧的每个相应块确定第一加权因子来生成替代参考帧，该第一加权因子表示该块与相应块的时间相关性，为每个像素确定每个像素的第二加权因子 滤波器组的相应帧的相应块，其表示像素与块中的空间相应像素的时间相关性，确定块中每个像素和每个空间相应像素的滤波器权重分别是对应块 基于第一加权因子和第二加权因子，并且为块中的每个像素位置生成加权平均像素值，以基于滤波器权重形成替代参考帧的块。