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：US09307258B2

公开(公告)日：2016-04-05

申请号：US13663651

申请日：2012-10-30

Applicant: Broadcom Corporation

Inventor： Alexander MacInnis ,  Hongtao Zhu ,  Jason Herrick ,  Brian Schoner ,  Junlin Li

IPC: H04N7/12 ,  H04N7/26 ,  H04N19/40 ,  H04N7/50 ,  H04N19/124 ,  H04N19/177 ,  H04N19/179 ,  H04N19/85

CPC classification number: H04N19/40 ,  H04N19/124 ,  H04N19/177 ,  H04N19/179 ,  H04N19/85

Abstract: Disclosed are various embodiments directed to transcoding a media file in parallel. A media file may be accessed, the media file comprising a bit stream expressing a series of pictures. A first random access point in the bit stream and a second random access point in the bit stream are identified. An input segment of the bit stream is generated, the input segment comprising a starting point, the starting point being the first random access point. One of a plurality of transcoders is selected to transcode the input segment for generating a corresponding output segment, each transcoder being configured to operate concurrently in parallel. The output segment is stored in a memory.

Abstract translation: 公开了针对并行地对媒体文件进行代码转换的各种实施例。 可以访问媒体文件，媒体文件包括表示一系列图片的比特流。 识别比特流中的第一随机接入点和比特流中的第二随机接入点。 生成比特流的输入段，输入段包括起点，起始点是第一随机接入点。 选择多个代码转换器之一来对输入段进行代码转换以产生对应的输出段，每个代码转换器被配置为并行地同时运行。 输出段存储在存储器中。

公开(公告)号：US20140153909A1

公开(公告)日：2014-06-05

申请号：US14041024

申请日：2013-09-30

Applicant: Broadcom Corporation

Inventor： Alexander Garland MacInnis ,  Hongtao Zhu ,  Jason William Herrick ,  Brian Francis Schoner ,  Junlin Li

IPC: H04N9/80 ,  H04N7/26

CPC classification number: H04N9/80 ,  H04N5/91 ,  H04N9/7921 ,  H04N9/8205 ,  H04N19/40 ,  H04N19/436 ,  H04N21/242 ,  H04N21/8456 ,  H04N21/8547

Abstract: Disclosed are various embodiments directed to transcoding a bit stream comprising audio and video frames that contains discontinuities. The video and/or audio portion of the bit stream may be divided into segments, where some of the segments are transcoded in parallel using a plurality of transcoder devices. In some embodiments, a discontinuity is detected in the bit stream before encoding, where the discontinuity is associated with a shift in a set of time stamps associated with the bit stream. A magnitude of the discontinuity is determined. The transcoding system aligns at least a portion of the audio frames to the series of video frames according to at least the discontinuity and the magnitude of the discontinuity. In other embodiments, the discontinuity is detected after encoding by analyzing time stamps that have been established during the transcoding process.

Abstract translation: 公开了针对包含包含不连续性的音频和视频帧的位流进行代码转换的各种实施例。 比特流的视频和/或音频部分可以被划分成段，其中一些片段使用多个代码转换器装置并行地转码。 在一些实施例中，在编码之前的比特流中检测到不连续性，其中不连续性与与比特流相关联的一组时间戳的偏移相关联。 确定不连续性的大小。 代码转换系统至少根据不连续性的不连续性和幅度对准音频帧的至少一部分到视频帧系列。 在其他实施例中，通过分析在转码过程中建立的时间戳，在编码之后检测不连续性。

公开(公告)号：US20140139733A1

公开(公告)日：2014-05-22

申请号：US13840026

申请日：2013-03-15

Applicant: BROADCOM CORPORATION

Inventor： Alexander Garland MacInnis ,  Hongtao Zhu ,  Jason William Herrick ,  Brian Francis Schoner ,  Junlin Li

IPC: H04N7/26

CPC classification number: H04N19/40 ,  H04N19/124 ,  H04N19/146 ,  H04N19/154 ,  H04N19/174 ,  H04N19/436

Abstract: Disclosed are various embodiments directed to transcoding a bit stream in parallel. A bit stream may be divided into a plurality of segments, where a plurality of transcoders encode at least a portion of the segments in parallel. If encoding is performed using variable bit rate (BR) encoding, each encoder may encode a segment and vary a BR for the segment. A measured average BR is compared with a target average BR to determine whether to adjust a video quality level (VQL) or any other encoder parameter. A relatively constant subjective quality may be maintained using variable BR encoding while achieving a target average BR. When using constant BR encoding, a VQL or other encoder parameter is used by encoders to achieve relatively constant subjective quality. For example, a relatively continuous quantization parameter between adjacent encoded segments may be achieved.

Abstract translation: 公开了针对并行地对码流进行代码转换的各种实施例。 比特流可以被划分成多个段，其中多个代码转换器并行地对段的至少一部分进行编码。 如果使用可变比特率（BR）编码来执行编码，则每个编码器可以对段进行编码并改变段的BR。 将测量的平均BR与目标平均BR进行比较，以确定是否调整视频质量水平（VQL）或任何其他编码器参数。 可以使用可变BR编码来维持相对恒定的主观质量，同时实现目标平均BR。 当使用常数BR编码时，编码器使用VQL或其他编码器参数来实现相对恒定的主观质量。 例如，可以实现相邻编码段之间相对连续的量化参数。

公开(公告)号：US09635334B2

公开(公告)日：2017-04-25

申请号：US14041024

申请日：2013-09-30

Applicant: Broadcom Corporation

Inventor： Alexander Garland MacInnis ,  Hongtao Zhu ,  Jason William Herrick ,  Brian Francis Schoner ,  Junlin Li

IPC: H04N5/932 ,  H04N9/80 ,  H04N19/436 ,  H04N19/40 ,  H04N21/242 ,  H04N5/91 ,  H04N9/79 ,  H04N21/845 ,  H04N21/8547 ,  H04N9/82

CPC classification number: H04N9/80 ,  H04N5/91 ,  H04N9/7921 ,  H04N9/8205 ,  H04N19/40 ,  H04N19/436 ,  H04N21/242 ,  H04N21/8456 ,  H04N21/8547

Abstract: Disclosed are various embodiments directed to transcoding a bit stream comprising audio and video frames that contains discontinuities. The video and/or audio portion of the bit stream may be divided into segments, where some of the segments are transcoded in parallel using a plurality of transcoder devices. In some embodiments, a discontinuity is detected in the bit stream before encoding, where the discontinuity is associated with a shift in a set of time stamps associated with the bit stream. A magnitude of the discontinuity is determined. The transcoding system aligns at least a portion of the audio frames to the series of video frames according to at least the discontinuity and the magnitude of the discontinuity. In other embodiments, the discontinuity is detected after encoding by analyzing time stamps that have been established during the transcoding process.

公开(公告)号：US08928804B2

公开(公告)日：2015-01-06

申请号：US13840026

申请日：2013-03-15

Applicant: Broadcom Corporation

Inventor： Alexander Garland MacInnis ,  Hongtao Zhu ,  Jason William Herrick ,  Brian Francis Schoner ,  Junlin Li

IPC: H04N7/01 ,  H04N7/26 ,  H04N19/40 ,  H04N19/124 ,  H04N19/146 ,  H04N19/436

CPC classification number: H04N19/40 ,  H04N19/124 ,  H04N19/146 ,  H04N19/154 ,  H04N19/174 ,  H04N19/436

Abstract: Disclosed are various embodiments directed to transcoding a bit stream in parallel. A bit stream may be divided into a plurality of segments, where a plurality of transcoders encode at least a portion of the segments in parallel. If encoding is performed using variable bit rate (BR) encoding, each encoder may encode a segment and vary a BR for the segment. A measured average BR is compared with a target average BR to determine whether to adjust a video quality level (VQL) or any other encoder parameter. A relatively constant subjective quality may be maintained using variable BR encoding while achieving a target average BR. When using constant BR encoding, a VQL or other encoder parameter is used by encoders to achieve relatively constant subjective quality. For example, a relatively continuous quantization parameter between adjacent encoded segments may be achieved.

Abstract translation: 公开了针对并行地对码流进行代码转换的各种实施例。 比特流可以被划分成多个段，其中多个代码转换器并行地对段的至少一部分进行编码。 如果使用可变比特率（BR）编码来执行编码，则每个编码器可以对段进行编码并改变段的BR。 将测量的平均BR与目标平均BR进行比较，以确定是否调整视频质量水平（VQL）或任何其他编码器参数。 可以使用可变BR编码来维持相对恒定的主观质量，同时实现目标平均BR。 当使用常数BR编码时，编码器使用VQL或其他编码器参数来实现相对恒定的主观质量。 例如，可以实现相邻编码段之间相对连续的量化参数。

公开(公告)号：US20140119457A1

公开(公告)日：2014-05-01

申请号：US13663651

申请日：2012-10-30

Applicant: BROADCOM CORPORATION

Inventor： Alexander MacInnis ,  Hongtao Zhu ,  Jason Herrick ,  Brian Schoner ,  Junlin Li

IPC: H04N7/26

CPC classification number: H04N19/40 ,  H04N19/124 ,  H04N19/177 ,  H04N19/179 ,  H04N19/85

Abstract: Disclosed are various embodiments directed to transcoding a media file in parallel. A media file may be accessed, the media file comprising a bit stream expressing a series of pictures. A first random access point in the bit stream and a second random access point in the bit stream are identified. An input segment of the bit stream is generated, the input segment comprising a starting point, the starting point being the first random access point. One of a plurality of transcoders is selected to transcode the input segment for generating a corresponding output segment, each transcoder being configured to operate concurrently in parallel. The output segment is stored in a memory.

Abstract translation: 公开了针对并行地对媒体文件进行代码转换的各种实施例。 可以访问媒体文件，媒体文件包括表示一系列图片的比特流。 识别比特流中的第一随机接入点和比特流中的第二随机接入点。 生成比特流的输入段，输入段包括起点，起始点是第一随机接入点。 选择多个代码转换器之一来对输入段进行代码转换以产生对应的输出段，每个代码转换器被配置为并行地同时运行。 输出段存储在存储器中。