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21. 发明授权

US5734419A Method of encoder control 失效
标题翻译：编码器控制方法
公开(公告)号：US5734419A
公开(公告)日：1998-03-31
申请号：US327530
申请日：1994-10-21
申请人： Nelson Botsford, III , Alireza Farid Faryar , Rajesh Hingorani , Kim Nigel Matthews , David Thomas , Siu-Wai Wu
发明人： Nelson Botsford, III , Alireza Farid Faryar , Rajesh Hingorani , Kim Nigel Matthews , David Thomas , Siu-Wai Wu
IPC分类号： G06T9/00 , H04N1/41 , H04N7/24 , H04N7/52 , H04N19/00 , H04N19/50 , H04N21/234 , H04N21/236 , H04N21/434 , H04N21/44 , H04N5/14
CPC分类号： H04N19/59 , H04N19/117 , H04N19/132 , H04N19/14 , H04N19/142 , H04N19/149 , H04N19/172 , H04N19/176 , H04N19/179 , H04N19/46 , H04N19/61 , H04N19/85 , H04N19/146 , H04N7/0112
摘要： A video encoder control system and method are disclosed for controlling a video encoder using a processor having a multiple field delay circuit for delaying input video data by a predetermined number of frames, and a statistics generator for generating statistics from the video data to control the encoder. The statistics generator calculates a sum of absolute values of field differences between pixels, with the sum used for detecting a redundant field, for generating a film flag, and for controlling the encoder using the film flag. The statistics generator calculates averages of blocks of pixels, and a fade detector uses the averages for detecting fades between successive frames to generate a fade flag to control the encoding. The rate controller responds to the statistics to change the resolution of the encoding of successive frames. The processor outputs the film flags, scene change flags, and fade flags to the rate controller to control the encoding of the delayed video data. A method is disclosed for controlling the video encoder including the steps of delaying the input video data, generating frame statistics, and controlling the encoder using the statistics.
摘要翻译：公开了一种用于使用具有用于将输入视频数据延迟预定帧数的多场延迟电路的处理器来控制视频编码器的视频编码器控制系统和方法，以及用于从视频数据产生统计数据以控制编码器。统计发生器计算像素之间的场差的绝对值之和，用于检测冗余场的和，用于产生胶片标志，以及使用胶片标志来控制编码器。统计生成器计算像素块的平均值，并且渐变检测器使用用于检测连续帧之间的渐变的平均值来生成淡入淡出标志来控制编码。速率控制器响应统计信息来改变连续帧编码的分辨率。处理器将电影标志，场景改变标志和淡入淡出标志输出到速率控制器以控制延迟的视频数据的编码。公开了一种用于控制视频编码器的方法，包括以下步骤：延迟输入视频数据，生成帧统计信息，并使用统计信息控制编码器。

22. 发明授权

US07653129B2 Method and apparatus for providing intra coding frame bit budget 有权
标题翻译：提供帧内编码帧位预算的方法和装置
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。

23. 发明授权

US07450609B2 Method and apparatus for statistically multiplexing multiple groups of services 有权
标题翻译：用于统计复用多组服务的方法和装置
公开(公告)号：US07450609B2
公开(公告)日：2008-11-11
申请号：US10265080
申请日：2002-10-04
申请人： Vincent Liu , Siu-Wai Wu , Ly Tran , Craig Cuttner
发明人： Vincent Liu , Siu-Wai Wu , Ly Tran , Craig Cuttner
IPC分类号： H04J3/16 , H04J3/18
CPC分类号： H04N21/2402 , H04B7/18523 , H04J3/1682 , H04N21/2365 , H04N21/26216 , H04N21/4347
摘要： Methods and apparatus are provided for allocating bandwidth among members of two statistical multiplexing groups having overlapping members. At least two groups of such services having overlapping members are defined. The members of a first one of the groups consume a first bandwidth and the members of a second one of the groups consume a second bandwidth. A total bandwidth of all the members of the groups together is restricted to be no more than a total available bandwidth. In order to accomplish this, the members of the first and second groups are statistically multiplexed based on bandwidth requirements of members common to both said first and second groups.
摘要翻译：提供了用于在具有重叠成员的两个统计复用组的成员之间分配带宽的方法和装置。定义了具有重叠成员的至少两组这样的服务。组中的第一组的成员消耗第一带宽，并且组中的第二组的成员消耗第二带宽。组的所有成员的总带宽被限制为不超过总可用带宽。为了实现这一点，基于对所述第一组和第二组共同的成员的带宽要求来统计地对第一组和第二组的成员进行多路复用。

24. 发明授权

US07251275B2 Methods and apparatus for statistical multiplexing during dual pass encoding 有权
标题翻译：双通道编码期间统计复用的方法和装置
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。

25. 发明申请

US20060140267A1 Method and apparatus for providing intra coding frame bit budget 有权
标题翻译：提供帧内编码帧位预算的方法和装置
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。

26. 发明授权

US06963608B1 Method and apparatus for providing rate control in a video encoder 有权
标题翻译：用于在视频编码器中提供速率控制的方法和装置
公开(公告)号：US06963608B1
公开(公告)日：2005-11-08
申请号：US09806626
申请日：1999-09-29
申请人： Siu-Wai Wu
发明人： Siu-Wai Wu
IPC分类号： H04B1/66 , H04N7/12 , H04N7/26 , H04N7/50
CPC分类号： H04N19/436 , H04N19/115 , H04N19/124 , H04N19/136 , H04N19/142 , H04N19/149 , H04N19/15 , H04N19/152 , H04N19/174 , H04N19/177 , H04N19/61
摘要： A method and apparatus are provided for controlling the quantization level in a digital video encoder that comprises a plurality of parallel compression engines (12). The input picture is partitioned into a number of panels (10) and each panel is processed by a distinct compression engine (12). A reference quantizer scale is determined before encoding a frame of video. The reference quantizer scale is used at the first slice of every video image panel being processed by the video encoder. The quantizer scale at the last slice of the image panel is then forced to be the same as the first slice. The forcing step can use a piecewise-linear feedback formula. A group of pictures (GOP) target bit rate is adjusted based on the number of film pictures and non-film pictures currently in the processing pipeline of at least one of the compression engines. A higher target bit rate is provided for non-film pictures. A buffer (16) level of the video encoder is used to control the start of a new group of pictures (GOP). The start of a new GOP is delayed if the buffer (16) does not have sufficient space to accommodate an intra-coded (I) frame for the new GOP.
摘要翻译：提供了一种用于控制包括多个并行压缩引擎（12）的数字视频编码器中的量化级别的方法和装置。输入图像被分割成多个面板（10），并且每个面板由不同的压缩引擎（12）处理。在编码视频帧之前确定参考量化器比例。参考量化器刻度用于由视频编码器处理的每个视频图像面板的第一片。然后将图像面板最后一个切片的量化器刻度强制为与第一切片相同。强制步骤可以使用分段线性反馈公式。基于当前处于至少一个压缩引擎的处理流水线中的胶片图像和非胶片图像的数量来调整图像组（GOP）目标比特率。为非电影照片提供了更高的目标比特率。使用视频编码器的缓冲器（16）电平来控制新的图像组（GOP）的开始。如果缓冲器（16）没有足够的空间来适应新的GOP的帧内编码（I）帧，则新GOP的开始被延迟。

27. 发明授权

US06904094B1 Processing mode selection for channels in a video multi-processor system 有权
标题翻译：视频多处理器系统中的通道的处理模式选择
公开(公告)号：US06904094B1
公开(公告)日：2005-06-07
申请号：US09665372
申请日：2000-09-20
申请人： Vincent Liu , Robert S. Nemiroff , Siu-Wai Wu , Ajay Luthra , Limin Wang
发明人： Vincent Liu , Robert S. Nemiroff , Siu-Wai Wu , Ajay Luthra , Limin Wang
IPC分类号： H04N7/26 , H04N7/50 , H04N7/12 , H04N11/02
CPC分类号： H04N19/40 , H04N19/156 , H04N19/42 , H04N19/436 , H04N19/61
摘要： An efficient processing system, such as for transcoding video data. In an embodiment that is suitable for single or multiple processor embodiments, a processing mode is set for each input video frame, e.g., as a full transcode mode, which uses motion compensation, a requantization mode, which avoids motion compensation, or a bypass mode. The processing mode selection is based on a number of processing cycles that are available to process a frame, and an expected processing requirement of the frame. The bypass or requantization modes are selected to avoid a buffer overflow of the processor.
摘要翻译：一种高效的处理系统，例如用于对视频数据进行代码转换。在适用于单个或多个处理器实施例的实施例中，为每个输入视频帧设置处理模式，例如，使用运动补偿的全代码转换模式，避免运动补偿的再量化模式或旁路模式。处理模式选择基于可用于处理帧的多个处理周期以及帧的预期处理要求。选择旁路或再量化模式以避免处理器的缓冲区溢出。

28. 发明授权

US06731685B1 Method and apparatus for determining a bit rate need parameter in a statistical multiplexer 有权
标题翻译：用于在统计多路复用器中确定比特率需求参数的方法和装置
公开(公告)号：US06731685B1
公开(公告)日：2004-05-04
申请号：US09665373
申请日：2000-09-20
申请人： Vincent Liu , Siu-Wai Wu , Hanson On , Robert S. Nemiroff , Michael Casteloes , Jing Yang Chen , Rebecca Lam
发明人： Vincent Liu , Siu-Wai Wu , Hanson On , Robert S. Nemiroff , Michael Casteloes , Jing Yang Chen , Rebecca Lam
IPC分类号： H04N712
CPC分类号： H04N21/4344 , H04J3/1688 , H04N19/115 , H04N19/137 , H04N19/14 , H04N19/159 , H04N19/172 , H04N19/196 , H04N19/198 , H04N19/577 , H04N19/61 , H04N21/23608 , H04N21/2365 , H04N21/23655 , H04N21/4347
摘要： A statistical multiplexer for coding and multiplexing multiple channels of digital television data, or multiple panels of HDTV digital television data. A bit rate need parameter is determined for each encoder in a stat mux group by scaling the complexities of previous pictures of the same and different picture types. Scaling factors based on an activity level, motion estimation score, and number of pictures of a certain type in a GOP, may be used. Moreover, the scaling factors may be bounded based on a linear or non-linear operator to prevent large variations in the factors. An encoding bit rate is allocated to each channel based on its need parameter.
摘要翻译：用于编码和复用多个数字电视数据的多路复用器，或多个HDTV数字电视数据面板。通过缩放相同和不同图像类型的以前图像的复杂度，在统计复用组中为每个编码器确定比特率需求参数。可以使用基于活动水平，运动估计得分和GOP中某种类型的图片数量的缩放因子。此外，缩放因子可以基于线性或非线性算子来限制，以防止因素中的大的变化。根据其需要参数将编码比特率分配给每个信道。

29. 发明授权

US06724825B1 Regeneration of program clock reference data for MPEG transport streams 有权
标题翻译： MPEG传输流程序时钟参考数据的再生
公开(公告)号：US06724825B1
公开(公告)日：2004-04-20
申请号：US09667734
申请日：2000-09-22
申请人： Robert S. Nemiroff , Vincent Liu , Siu-Wai Wu
发明人： Robert S. Nemiroff , Vincent Liu , Siu-Wai Wu
IPC分类号： H04B766
CPC分类号： H04N21/2365 , H04N19/40 , H04N21/2343 , H04N21/23608
摘要： A system for providing an accurate time reference for multiple input and output digital video signals of a transcoder that is particularly suited for use with MPEG data. The multiple streams are synchronized with a single master system time clock at the transcoder. Timing data from the master clock is compared to timing data from packets that are input to the transcoder to determine an offset. In particular, timing data, such as a program clock reference (PCR) field, is recovered from packets of different channels that are input to the transcoder. For each channel, timing data is then provided for packets that are output from the transcoder based on the offset and timing data of the master clock at the respective output times. In particular, the adjusted timing data is determined as a sum of the offset and an associated hardware error, less a delay (PcrSysDly) associated with the transcoder, which includes a lookahead delay and a buffer delay. The associated hardware error represents an error of the master clock and/or a system time clock of an encoder that encoded the particular channel.
摘要翻译：一种用于为特别适合于与MPEG数据一起使用的代码转换器的多个输入和输出数字视频信号提供精确的时间基准的系统。多个流与代码转换器的单个主系统时钟同步。将来自主时钟的定时数据与来自输入到代码转换器的分组的定时数据进行比较以确定偏移。具体地，诸如程序时钟参考（PCR）字段的定时数据从输入到代码转换器的不同信道的分组中恢复。对于每个通道，然后基于在相应输出时间的主时钟的偏移和定时数据，从代码转换器输出的分组提供定时数据。特别地，调整的定时数据被确定为偏移量和相关联的硬件错误的总和，减去与代码转换器相关联的延迟（PcrSysDly），其包括前瞻延迟和缓冲器延迟。相关联的硬件错误表示编码特定信道的编码器的主时钟和/或系统时钟的错误。

30. 发明授权

US06594271B1 Implementation of opportunistic data on a statistical multiplexing encoder 有权
标题翻译：在统计复用编码器上实现机会数据
公开(公告)号：US06594271B1
公开(公告)日：2003-07-15
申请号：US09356529
申请日：1999-07-19
申请人： Siu-Wai Wu , Kevin Wirick
发明人： Siu-Wai Wu , Kevin Wirick
IPC分类号： H04L1228
CPC分类号： H04N21/23655 , H04J3/1682 , H04J3/247 , H04N21/23614
摘要： A method and apparatus for providing an opportunistic data capability for an existing statistical multiplexing encoder platform, such as a multi-channel video data encoder. An Opportunistic Data Processor (ODP) is provided as a plug-in card or an external device that can be interfaced with an existing multi-channel encoder. The ODP communicates with a Quantization Level Processor (QLP) and Packet Multiplexer (PM) in the multi-channel encoder as if it was just another channel encoder. The ODP implements a special rate control scheme by encoding data and sending it to the PM only when a global Quantization Level (QL) indicates that spare bandwidth is available. Spare bandwidth is assumed to be available when the global QL is less than a threshold value. Moreover, the OPD sends a bandwidth need parameter to the QLP, as do the other channel encoders. However, the ODP's need parameter is scaled by a function of the global QL to attenuate its actual bandwidth need as the global QL increases to provide smooth variations in the ODP's encoded data rate.
摘要翻译：一种用于为诸如多通道视频数据编码器的现有统计多路复用编码器平台提供机会数据能力的方法和装置。机会数据处理器（ODP）作为插件卡或可与现有多通道编码器对接的外部设备提供。 ODP与多通道编码器中的量化级处理器（QLP）和分组多路复用器（PM）进行通信，就好像它只是另一个通道编码器。 ODP通过对数据进行编码并通过全局量化级别（QL）指示备用带宽可用时将其发送给PM来实现特殊的速率控制方案。当全局QL小于阈值时，假设备用带宽可用。此外，OPD向QLP发送带宽需求参数，与其他通道编码器一样。然而，随着全局QL增加，ODP的需求参数由全局QL的函数缩放以衰减其实际带宽需求，以提供ODP编码数据速率的平滑变化。

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