公开(公告)号：US09451251B2

公开(公告)日：2016-09-20

申请号：US13693177

申请日：2012-12-04

Applicant: Broadcom Corporation

Inventor： Lei Zhang

IPC: H04N7/26 ,  H04N19/40 ,  H04N19/423 ,  H04N19/436

CPC classification number: H04N19/40 ,  H04N19/423 ,  H04N19/436

Abstract: A method for transcoding a video file bit stream in parallel at a sub picture latency and faster than real time rate includes writing to a memory a processed raw pixel data stream. The processed raw pixel data stream is expressed as a sequence of pictures. Each picture is divided into a first sub picture partition and a second sub picture partition. A first encoder encodes each first sub picture partition, the first encoder being communicatively coupled to the memory. A second encoder encodes each second sub picture partition, the second encoder being communicatively coupled to the memory.

Abstract translation: 用于以副图像等待时间并且比实时速率更快并行地对视频文件比特流进行代码转换的方法包括向存储器写入经处理的原始像素数据流。 处理的原始像素数据流被表示为图像序列。 每个图像被分成第一子图像分区和第二子图像分区。 第一编码器对每个第一子图像分区进行编码，第一编码器通信地耦合到存储器。 第二编码器对每个第二子图像分区进行编码，第二编码器通信地耦合到存储器。

公开(公告)号：US20140334533A1

公开(公告)日：2014-11-13

申请号：US13905692

申请日：2013-05-30

Applicant: Broadcom Corporation

Inventor： Lei Zhang

IPC: H04N19/103 ,  H04N19/157 ,  H04N19/156

CPC classification number: H04N19/176 ,  H04N19/119 ,  H04N19/156

Abstract: A system and method for encoding video is provided. The system may partition a video frame into multiple coding units. The system may determine a memory bandwidth budget and selectively code each coding unit based on a memory cost as compared to the memory bandwidth budget.

Abstract translation: 提供了一种用于编码视频的系统和方法。 系统可以将视频帧划分成多个编码单元。 系统可以确定存储器带宽预算，并且与存储器带宽预算相比，基于存储器成本选择性地编码每个编码单元。

公开(公告)号：US09172966B2

公开(公告)日：2015-10-27

申请号：US13905692

申请日：2013-05-30

Applicant: Broadcom Corporation

Inventor： Lei Zhang

IPC: H04N19/18 ,  H04N19/176 ,  H04N19/119 ,  H04N19/156

CPC classification number: H04N19/176 ,  H04N19/119 ,  H04N19/156

Abstract: A system and method for encoding video is provided. The system may partition a video frame into multiple coding units. The system may determine a memory bandwidth budget and selectively code each coding unit based on a memory cost as compared to the memory bandwidth budget.

Abstract translation: 提供了一种用于编码视频的系统和方法。 系统可以将视频帧划分成多个编码单元。 系统可以确定存储器带宽预算，并且与存储器带宽预算相比，基于存储器成本选择性地编码每个编码单元。

公开(公告)号：US20140177717A1

公开(公告)日：2014-06-26

申请号：US13832799

申请日：2013-03-15

Applicant: BROADCOM CORPORATION

Inventor： Junlin Li ,  Alexander Garland MacInnis ,  Brad Albert Delanghe ,  Lei Zhang

IPC: H04N7/26

CPC classification number: H04N19/00909 ,  H04N19/136 ,  H04N19/159 ,  H04N19/40 ,  H04N19/86

Abstract: Various methods and systems are provided for reduction of I-pulsing artifacts. In one example, among others, a method includes modifying at least a portion of a picture to be encoded as an I picture based at least in part upon a picture that precedes the picture. The modification can reduce an I-pulsing artifact associated with the I picture. The modified picture is intra-coded for inclusion in a series of encoded pictures, which may then be transmitted. In another example, an encoder includes adaptive pre-processing circuitry configured to modify at least a portion of a first picture based at least in part upon a second picture that precedes the first picture in a series of video pictures. For example, the modification may be based upon coding noise associated with the preceding picture. Intra-encoding processing circuitry is configured to encode the modified picture as an I picture.

Abstract translation: 提供了各种方法和系统来减少I脉冲伪像。 在一个示例中，除其他之外，方法包括至少部分地基于图片之前的图片来修改要编码为I图片的图片的至少一部分。 该修改可以减少与I图像相关联的I脉冲伪影。 经修改的图像被内编码以包含在一系列编码图像中，然后可以传输它们。 在另一示例中，编码器包括自适应预处理电路，其被配置为至少部分地基于在一系列视频图像中的第一图像之前的第二图像来修改第一图片的至少一部分。 例如，修改可以基于与前一图像相关联的编码噪声。 内部编码处理电路被配置为将修改的图像编码为I图像。

公开(公告)号：US20140146869A1

公开(公告)日：2014-05-29

申请号：US13693177

申请日：2012-12-04

Applicant: BROADCOM CORPORATION

Inventor： Lei Zhang

IPC: H04N7/26

CPC classification number: H04N19/40 ,  H04N19/423 ,  H04N19/436

Abstract: Disclosed are various embodiments directed to transcoding a video file bit stream in parallel at a sub picture latency and faster than real time rate. A processed raw pixel data stream is written to a memory, the processed raw pixel data stream being expressed as a sequence of pictures. Each picture is divided into a first sub picture partition and a second sub picture partition. A first encoder encodes each first sub picture partition, the first encoder being communicatively coupled to the memory, and a second encoder encodes each second sub picture partition, the second encoder being communicatively coupled to the memory.

Abstract translation: 公开了针对视频文件比特流以副图像等待时间并且比实时速率更快并行地转码的各种实施例。 将经处理的原始像素数据流写入存储器，处理的原始像素数据流被表示为图像序列。 每个图像被分成第一子图像分区和第二子图像分区。 第一编码器对每个第一子图像分区进行编码，第一编码器通信地耦合到存储器，第二编码器对每个第二子图像分区进行编码，第二编码器通信地耦合到存储器。

公开(公告)号：US20140119434A1

公开(公告)日：2014-05-01

申请号：US13662976

申请日：2012-10-29

Applicant: BROADCOM CORPORATION

Inventor： Lei Zhang

IPC: H04N7/32

CPC classification number: H04N19/107 ,  H04N19/147 ,  H04N19/176

Abstract: The present disclosure relates to the use of adaptive intra-refreshing of video coding units to improve video perceptive quality by reducing artifacts such as I-pulsing. A picture to be encoded as an inter-coded picture is received from a video stream. A coding unit of the picture is encoded using an inter-predicted mode or an intra-predicted mode, where the mode is selected according to a selection function applied to the coding unit. The selection function is biased based at least in part on a temporal distance between the picture and a nearest intra-coded picture in the video stream. In various embodiments, bit rate, distortion from prediction errors, quantization factors and differences between pictures, content information, hypothetical reference decoder buffer information, group of pictures length, position of the coding unit, and/or other information may be factors employed in the selection function.

Abstract translation: 本公开涉及使用视频编码单元的自适应内部刷新来通过减少诸如I脉冲之类的伪影来提高视频感知质量。 从视频流接收要编码为帧间编码图像的图像。 使用帧间预测模式或帧内预测模式对图像的编码单元进行编码，其中根据应用于编码单元的选择功能选择模式。 所述选择功能至少部分地基于所述图像与所述视频流中最近的帧内编码图像之间的时间距离而偏置。 在各种实施例中，比特率，来自预测误差的失真，量化因子和图像之间的差异，内容信息，假设参考解码器缓冲器信息，图片组长度，编码单元的位置和/或其他信息可以是在 选择功能。