公开(公告)号：US06961376B2

公开(公告)日：2005-11-01

申请号：US10183196

申请日：2002-06-25

申请人： Siu-Wai Wu ,  Vincent Liu ,  Yong He

发明人： Siu-Wai Wu ,  Vincent Liu ,  Yong He

IPC分类号： H04N7/26 ,  H04N7/12

CPC分类号： H04N19/194 ,  H04N19/115 ,  H04N19/14 ,  H04N19/172

摘要： Methods and apparatus for rate control in a dual pass encoding scheme are provided. A first pass encoder encodes alternate slices of anchor frames as I-slices and P-slices respectively in order to generate statistics for both I and P frame encoding for the same anchor frame. An initial complexity estimate for encoding a current frame is determined by the first pass encoder based on statistics from first pass encoding of the current frame and from first pass encoding of a prior encoded frame. A second pass encoder estimates an encoding complexity for the current frame based on the initial complexity and statistics from second pass encoding of the prior encoded frame. The second pass encoder then determines a bit budget for second pass encoding of the current frame based on the encoding complexity.

摘要翻译： 提供了双通道编码方案中的速率控制方法和装置。 第一遍编码器将锚帧的替代片分别编码为I片和P片，以便产生用于相同锚帧的I和P帧编码的统计。 用于编码当前帧的初始复杂度估计由第一遍编码器基于来自当前帧的第一遍编码和先前编码帧的第一遍编码的统计确定。 第二遍编码器基于来自先前编码帧的第二遍编码的初始复杂度和统计信息来估计当前帧的编码复杂度。 然后，第二遍编码器基于编码复杂度确定当前帧的第二遍编码的比特预算。

公开(公告)号：US08154656B2

公开(公告)日：2012-04-10

申请号：US12345128

申请日：2008-12-29

申请人： Yong He ,  Siu-Wai Wu

发明人： Yong He ,  Siu-Wai Wu

IPC分类号： H04N7/08

CPC分类号： H04N21/4348 ,  H04N21/235 ,  H04N21/23614 ,  H04N21/2362 ,  H04N21/2383 ,  H04N21/435 ,  H04N21/8133

摘要： A system, method, and computer readable medium for avoiding underflow of a caption buffer in a digital video encoding device. The method receives a sequence of digital video frames, and captions that correspond to the digital video frames in the sequence. The method receives first captions in a first caption carriage, and encodes the first captions, and the corresponding digital video frames, in a compressed video format. The method detects a switch from the first caption carriage to a second caption carriage, and stores second captions in the capture buffer, where each second caption is received in the second caption carriage and corresponds to one of the digital video frames in the sequence. The method examines the capture buffer and the second captions to determine whether underflow of the capture buffer is present or absent. When underflow is absent, the method encodes the second captions, and the corresponding digital video frames, in the compressed video format.

摘要翻译： 一种用于避免数字视频编码装置中字幕缓冲器下溢的系统，方法和计算机可读介质。 该方法接收数字视频帧的序列，以及与序列中的数字视频帧对应的标题。 该方法在第一字幕托架中接收第一字幕，并以压缩视频格式对第一字幕和对应的数字视频帧进行编码。 该方法检测从第一字幕托架到第二字幕托架的切换，并将第二字幕存储在捕获缓冲器中，其中每个第二标题在第二字幕托架中被接收，并且对应于序列中的数字视频帧之一。 该方法检查捕获缓冲区和第二个字幕以确定捕获缓冲区的下溢是否存在或不存在。 当不存在下溢时，该方法以压缩视频格式对第二字幕和相应的数字视频帧进行编码。

公开(公告)号：US07274739B2

公开(公告)日：2007-09-25

申请号：US10441334

申请日：2003-05-19

申请人： Siu-Wai Wu ,  Yong He

发明人： Siu-Wai Wu ,  Yong He

IPC分类号： H04N7/12

CPC分类号： H04N21/23655 ,  H04N19/107 ,  H04N19/115 ,  H04N19/117 ,  H04N19/14 ,  H04N19/15 ,  H04N19/152 ,  H04N19/177 ,  H04N19/194

摘要： The present invention provides methods and apparatus for improving video quality in statistical multiplexing. For each encoding channel in a statistical multiplexer, a respective bit rate need parameter is calculated for encoding of a current frame in that encoding channel. A video buffering verifier level (VBV_Fullness) available to each encoding channel is also calculated. It is then determined whether the VBV_Fullness available to each encoding channel is sufficient for encoding the current frame of that encoding channel based on an initial complexity estimate for that current frame. In the event that the VBV_Fullness is determined to be sufficient, the current frame is encoded using the need parameter. In the event that the VBV_Fullness is determined to be insufficient, the need parameter is scaled by an adaptive panic multiplier and the current frame is encoded using the scaled need parameter.

摘要翻译： 本发明提供了用于提高统计复用中的视频质量的方法和装置。 对于统计多路复用器中的每个编码信道，为编码该编码信道中的当前帧而计算相应的比特率需求参数。 还计算对每个编码信道可用的视频缓冲验证器级（VBV_Fullness）。 然后，基于该当前帧的初始复杂度估计，确定每个编码信道可用的VBV_Fullness是否足以编码该编码信道的当前帧。 在VBV_Fullness被确定为足够的情况下，使用require参数对当前帧进行编码。 在VBV_Fullness被确定为不足的情况下，需求参数由自适应紧急乘数缩放，并且使用缩放的需求参数对当前帧进行编码。

公开(公告)号：US20050036549A1

公开(公告)日：2005-02-17

申请号：US10888268

申请日：2004-07-09

申请人： Yong He ,  Siu-Wai Wu

发明人： Yong He ,  Siu-Wai Wu

IPC分类号： G06F20060101 ,  H04N7/12 ,  H04N7/26

CPC分类号： H04N19/129 ,  H04N19/146 ,  H04N19/15 ,  H04N19/159 ,  H04N19/172 ,  H04N19/174 ,  H04N19/176 ,  H04N19/194 ,  H04N19/61

摘要： The present invention discloses a system and method for adaptive selection of scanning modes based on the content of the input image sequence. In one embodiment, two encoders are employed. A first encoder receives the input image sequence and encodes each frame of the image sequence using at least two different scanning modes, e.g., zigzag scanning mode or alternative scanning mode in accordance with the MPEG-2 standard or the like. Specifically, different portions of each frame will be scanned using different scanning modes. This first encoding provides look-ahead information so that a second encoder is able to assign DCT quantized coefficients in a more efficient scanning order, thereby reducing encoding bits and/or improving the picture quality.

摘要翻译： 本发明公开了一种基于输入图像序列的内容自适应选择扫描模式的系统和方法。 在一个实施例中，采用两个编码器。 第一编码器使用至少两种不同的扫描模式（例如，根据MPEG-2标准等的锯齿形扫描模式或替代扫描模式）接收输入图像序列并对图像序列的每个帧进行编码。 具体地，将使用不同的扫描模式来扫描每个帧的不同部分。 该第一编码提供预先信息，使得第二编码器能够以更有效的扫描顺序分配DCT量化系数，从而减少编码比特和/或提高图像质量。

公开(公告)号：US07653129B2

公开(公告)日：2010-01-26

申请号：US11023775

申请日：2004-12-28

申请人： Yong He ,  Siu-Wai Wu ,  Jing Yang Chen

发明人： Yong He ,  Siu-Wai Wu ,  Jing Yang Chen

IPC分类号： H04N7/12

CPC分类号： H04N19/103 ,  H04N19/115 ,  H04N19/124 ,  H04N19/152 ,  H04N19/159 ,  H04N19/172 ,  H04N19/177 ,  H04N19/51 ,  H04N19/57 ,  H04N19/61

摘要： The present invention discloses a system and method for adaptive adjustment of bit budget that favors the allocation of bits to intra coding frames (I frames). Namely, an encoder is able to dynamically adjust the bit budget for each picture type in an image sequence, thereby effecting proper usage of the available transmission bandwidth and improving the picture quality. In one embodiment, the present invention will allocate more encoding bandwidth to a current Intra coding frame when the average quantization level of inter coding frames (e.g., P and B frames) of a previous group of pictures is relatively high.

摘要翻译： 本发明公开了一种有利于对帧内编码帧（I帧）的比特分配的比特预算的自适应调整的系统和方法。 也就是说，编码器能够对图像序列中的每个图像类型的位预算进行动态调整，从而正确使用可用的传输带宽并提高图像质量。 在一个实施例中，当前一组图像的帧间编码帧（例如，P和B帧）的平均量化级别相对较高时，本发明将为当前的帧内编码帧分配更多的编码带宽。

公开(公告)号：US07251275B2

公开(公告)日：2007-07-31

申请号：US10183197

申请日：2002-06-25

申请人： Siu-Wai Wu ,  Vincent Liu ,  Yong He

发明人： Siu-Wai Wu ,  Vincent Liu ,  Yong He

IPC分类号： H04N7/12 ,  H04B1/66

CPC分类号： H04N21/4344 ,  H04N19/00 ,  H04N19/117 ,  H04N19/124 ,  H04N19/15 ,  H04N19/176 ,  H04N19/70 ,  H04N21/23608 ,  H04N21/2365 ,  H04N21/23655 ,  H04N21/4347

摘要： Methods and apparatus for statistical multiplexing in a dual pass encoding scheme are provided. A first pass encoder encodes alternate slices of anchor frames as I-slices and P-slices respectively in order to generate statistics for both I and P frame encoding for the same anchor frame. A second pass encoder determines the encoding complexity estimates for a plurality of frames in a look-ahead pipeline and sums the encoding complexity estimates of selective frames in the look-ahead pipeline to determine the initial need parameter for a current frame to be encoded. The second pass encoder computes a need parameter for encoding the current frame based on the initial need parameter. The need parameter is used by a statmux processor to determine the encoding bit rate for second pass encoding of the current frame.

摘要翻译： 提供了一种双通道编码方案中统计复用的方法和装置。 第一遍编码器将锚帧的替代片分别编码为I片和P片，以便产生用于相同锚帧的I和P帧编码的统计。 第二遍编码器确定先行流水线中的多个帧的编码复杂度估计，并对先行流水线中的选择帧的编码复杂度估计进行求和，以确定要编码的当前帧的初始需求参数。 第二遍编码器根据初始需求参数计算需要编码当前帧的参数。 statmux处理器使用需求参数来确定当前帧的第二遍编码的编码比特率。

公开(公告)号：US20060140267A1

公开(公告)日：2006-06-29

申请号：US11023775

申请日：2004-12-28

申请人： Yong He ,  Siu-Wai Wu ,  Jing Chen

发明人： Yong He ,  Siu-Wai Wu ,  Jing Chen

IPC分类号： H04N11/04 ,  H04N7/12 ,  H04B1/66 ,  H04N11/02

CPC分类号： H04N19/103 ,  H04N19/115 ,  H04N19/124 ,  H04N19/152 ,  H04N19/159 ,  H04N19/172 ,  H04N19/177 ,  H04N19/51 ,  H04N19/57 ,  H04N19/61

摘要： The present invention discloses a system and method for adaptive adjustment of bit budget that favors the allocation of bits to intra coding frames (I frames). Namely, an encoder is able to dynamically adjust the bit budget for each picture type in an image sequence, thereby effecting proper usage of the available transmission bandwidth and improving the picture quality. In one embodiment, the present invention will allocate more encoding bandwidth to a current Intra coding frame when the average quantization level of inter coding frames (e.g., P and B frames) of a previous group of pictures is relatively high.

摘要翻译： 本发明公开了一种有利于对帧内编码帧（I帧）的比特分配的比特预算的自适应调整的系统和方法。 也就是说，编码器能够对图像序列中的每个图像类型的位预算进行动态调整，从而正确使用可用的传输带宽并提高图像质量。 在一个实施例中，当前一组图像的帧间编码帧（例如，P和B帧）的平均量化级别相对较高时，本发明将为当前的帧内编码帧分配更多的编码带宽。

公开(公告)号：US20100165194A1

公开(公告)日：2010-07-01

申请号：US12345128

申请日：2008-12-29

申请人： Yong He ,  Siu-Wai Wu

发明人： Yong He ,  Siu-Wai Wu

IPC分类号： H04N7/08

CPC分类号： H04N21/4348 ,  H04N21/235 ,  H04N21/23614 ,  H04N21/2362 ,  H04N21/2383 ,  H04N21/435 ,  H04N21/8133

摘要： A system, method, and computer readable medium for avoiding underflow of a caption buffer in a digital video encoding device. The method receives a sequence of digital video frames, and captions that correspond to the digital video frames in the sequence. The method receives first captions in a first caption carriage, and encodes the first captions, and the corresponding digital video frames, in a compressed video format. The method detects a switch from the first caption carriage to a second caption carriage, and stores second captions in the capture buffer, where each second caption is received in the second caption carriage and corresponds to one of the digital video frames in the sequence. The method examines the capture buffer and the second captions to determine whether underflow of the capture buffer is present or absent. When underflow is absent, the method encodes the second captions, and the corresponding digital video frames, in the compressed video format.

摘要翻译： 一种用于避免数字视频编码装置中字幕缓冲器下溢的系统，方法和计算机可读介质。 该方法接收数字视频帧的序列，以及与序列中的数字视频帧对应的标题。 该方法在第一字幕托架中接收第一字幕，并以压缩视频格式对第一字幕和对应的数字视频帧进行编码。 该方法检测从第一字幕托架到第二字幕托架的切换，并将第二字幕存储在捕获缓冲器中，其中每个第二标题在第二字幕托架中被接收，并且对应于序列中的数字视频帧之一。 该方法检查捕获缓冲区和第二个字幕以确定捕获缓冲区的下溢是否存在或不存在。 当不存在下溢时，该方法以压缩视频格式对第二字幕和相应的数字视频帧进行编码。

公开(公告)号：US09237366B2

公开(公告)日：2016-01-12

申请号：US12761822

申请日：2010-04-16

申请人： Mark L. Schaffer ,  Siu-Wai Wu

发明人： Mark L. Schaffer ,  Siu-Wai Wu

IPC分类号： H04N13/00 ,  H04N21/2662 ,  H04N21/2343 ,  H04N21/236 ,  H04N19/597

CPC分类号： H04N13/161 ,  H04N13/194 ,  H04N19/597 ,  H04N21/2343 ,  H04N21/234309 ,  H04N21/234363 ,  H04N21/23608 ,  H04N21/2662

摘要： Method, apparatus and computer readable media for receiving a multiprogram program transport service that includes one or more compressed video services and one or more 3D-2D conversion options, generating an uncompressed video signal by performing a decoding portion of a transcoding operation for one of the one or more of the video services, determining from the 3D-2D conversion option whether a 3D-2D conversion is to be performed, performing a scale conversion on the uncompressed video according to a specified type of 3D-2D conversion, generating a compressed video service by performing an encoding portion of a transcoding operation on the uncompressed video that has been scale converted, and generating a second multiprogram program transport service that includes the compressed video signal that has been 3D-2D converted.

摘要翻译： 用于接收包括一个或多个压缩视频服务和一个或多个3D-2D转换选项的多程序节目传输服务的方法，装置和计算机可读介质，通过执行解压缩操作的解码部分来生成未压缩的视频信号， 一个或多个视频服务，根据3D-2D转换选项确定是否要执行3D-2D转换，根据指定类型的3D-2D转换对未压缩视频执行缩放转换，生成压缩视频 通过对已经缩放转换的未压缩视频执行代码转换操作的编码部分，并且生成包括已经被2D-2D转换的压缩视频信号的第二多路程序节目传输服务来进行服务。

公开(公告)号：US20110254917A1

公开(公告)日：2011-10-20

申请号：US12761822

申请日：2010-04-16

申请人： Mark L. Schaffer ,  Siu-Wai Wu

发明人： Mark L. Schaffer ,  Siu-Wai Wu

IPC分类号： H04N13/00

CPC分类号： H04N13/161 ,  H04N13/194 ,  H04N19/597 ,  H04N21/2343 ,  H04N21/234309 ,  H04N21/234363 ,  H04N21/23608 ,  H04N21/2662

摘要： Method, apparatus and computer readable media for receiving a multiprogram program transport service that includes one or more compressed video services and one or more 3D-2D conversion options, generating an uncompressed video signal by performing a decoding portion of a transcoding operation for one of the one or more of the video services, determining from the 3D-2D conversion option whether a 3D-2D conversion is to be performed, performing a scale conversion on the uncompressed video according to a specified type of 3D-2D conversion, generating a compressed video service by performing an encoding portion of a transcoding operation on the uncompressed video that has been scale converted, and generating a second multiprogram program transport service that includes the compressed video signal that has been 3D-2D converted.

摘要翻译： 用于接收包括一个或多个压缩视频服务和一个或多个3D-2D转换选项的多程序节目传输服务的方法，装置和计算机可读介质，通过执行解压缩操作的解码部分来生成未压缩的视频信号， 一个或多个视频服务，根据3D-2D转换选项确定是否要执行3D-2D转换，根据指定类型的3D-2D转换对未压缩视频执行缩放转换，生成压缩视频 通过对已经缩放转换的未压缩视频执行代码转换操作的编码部分，并且生成包括已经被2D-2D转换的压缩视频信号的第二多路程序节目传输服务来进行服务。