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1. 发明授权

US06198772B1 Motion estimation processor for a digital video encoder 失效
标题翻译：用于数字视频编码器的运动估计处理器
公开(公告)号：US06198772B1
公开(公告)日：2001-03-06
申请号：US08996856
申请日：1997-12-23
申请人： Charles E. Boice , Lawrence D. Curley , John M. Kaczmarczyk , Agnes Y. Ngai , Charles J. Stein
发明人： Charles E. Boice , Lawrence D. Curley , John M. Kaczmarczyk , Agnes Y. Ngai , Charles J. Stein
IPC分类号： H04N750
CPC分类号： H04N19/423 , H04N5/147 , H04N11/044 , H04N11/20 , H04N19/42 , H04N19/61
摘要： A digital video encoder system having a motion estimation processor, and an interface to the motion estimation processor. The motion estimation processor includes a reference memory interface, and inverse quantization processor, an inverse discrete cosine transform processor, and a motion estimation processor unit including a hierarchal search unit. The motion estimation processor is utilized generating temporally compressed datastreams, that is, I-P and I-P-B datastreams.
摘要翻译：一种具有运动估计处理器的数字视频编码器系统以及与运动估计处理器的接口。运动估计处理器包括参考存储器接口和逆量化处理器，反相离散余弦变换处理器，以及包括分级搜索单元的运动估计处理器单元。使用运动估计处理器来生成时间压缩的数据流，即I-P和I-P-B数据流。

2. 发明授权

US6040875A Method to compensate for a fade in a digital video input sequence 失效
标题翻译：补偿数字视频输入序列中的褪色的方法
公开(公告)号：US6040875A
公开(公告)日：2000-03-21
申请号：US046290
申请日：1998-03-23
申请人： Charles E. Boice , John M. Kaczmarczyk , Agnes Y. Ngai , Michael P. Vachon
发明人： Charles E. Boice , John M. Kaczmarczyk , Agnes Y. Ngai , Michael P. Vachon
IPC分类号： H04N5/265 , H04N7/26 , H04N7/50 , H04N9/74 , H04N5/14 , H04N7/12
CPC分类号： H04N5/265
摘要： A method to compensate for a fade in a digital video input sequence is provided where the video input sequence is to be compressed according to the MPEG-2 video compression standard. The method comprises a first step of dividing each frame of a current frame into two fields. In a second step, each field of the current frame is divided into at least one field band. In a third step, the luminance and chrominance pixel values are individually summed for the pixels in each field of the current frame. In a fourth step, the luminance pixel values are summed for the pixels in each field band of the current frame. In a fifth step, each respective field band sum and field sum of the current frame is compared with that of the previous frame in the video input sequence. In a sixth step, detection of whether or not a fade has occurred is provided, based upon the comparison in the fifth step. In a seventh step, the encoding algorithm is adjusted if a fade has occurred. Lastly, the first through seventh steps are repeated for at least one subsequent frame in the input video sequence.
摘要翻译：提供一种补偿数字视频输入序列中的褪色的方法，其中视频输入序列将根据MPEG-2视频压缩标准进行压缩。该方法包括将当前帧的每帧划分成两个场的第一步骤。在第二步骤中，当前帧的每个场被划分成至少一个场频带。在第三步骤中，针对当前帧的每个场中的像素对亮度和色度像素值进行单独相加。在第四步骤中，针对当前帧的每个场频带中的像素求和亮度像素值。在第五步骤中，将当前帧的每个相应的场频和和和与视频输入序列中的前一帧的场和进行比较。在第六步骤中，基于第五步的比较，提供是否发生褪色的检测。在第七步中，如果发生褪色，则调整编码算法。最后，对输入视频序列中的至少一个后续帧重复第一至第七步骤。

3. 发明授权

US06895048B2 Adaptive encoding of a sequence of still frames or partially still frames within motion video 失效
标题翻译：运动视频内的静止帧或部分静止帧序列的自适应编码
公开(公告)号：US06895048B2
公开(公告)日：2005-05-17
申请号：US09046118
申请日：1998-03-20
申请人： Charles E. Boice , Barbara A. Hall , Agnes Y. Ngai , Charles J. Stein , Everett G. Vail, III , Edward F. Westermann
发明人： Charles E. Boice , Barbara A. Hall , Agnes Y. Ngai , Charles J. Stein , Everett G. Vail, III , Edward F. Westermann
IPC分类号： H04N7/46 , H04N7/50 , H04N7/12
CPC分类号： H04N19/124 , H04N19/132 , H04N19/137 , H04N19/14 , H04N19/159 , H04N19/172 , H04N19/176 , H04N19/61 , H04N19/85 , H04N19/86
摘要： Method, system and computer program product are provided for adaptively encoding in hardware, software or a combination thereof a series of still or partially still pictures using motion video encoding. A pre-encode statistics measurement unit is employed to derive statistics on each frame of the sequence of video frames to be encoded. The statistics are determinative of whether the frame comprises a still frame. If so, at least one controllable parameter to be used to encode the still frame is modified, and an encoding engine employs the at least one controllable parameter to encode the still frame so that pulsation artifacts are prevented between still frames of the series of still frames. Partial still picture encoding to prevent pulsation artifacts on a macroblock level is also addressed.
摘要翻译：提供方法，系统和计算机程序产品用于使用运动视频编码在硬件，软件或其组合中自适应地编码一系列静止或部分静止图像。采用预编码统计测量单元来导出要编码的视频帧序列的每个帧的统计。统计信息决定了帧是否包括静止帧。如果是这样，则修改用于对静止帧进行编码的至少一个可控参数，并且编码引擎使用至少一个可控参数对静止帧进行编码，从而在一系列静止帧的静止帧之间防止脉动伪影。还解决了用于防止宏块级别上的脉动伪像的部分静止图像编码。

4. 发明授权

US06269120B1 Method of precise buffer management for MPEG video splicing 失效
标题翻译： MPEG视频拼接的精确缓冲管理方法
公开(公告)号：US06269120B1
公开(公告)日：2001-07-31
申请号：US09046288
申请日：1998-03-23
申请人： Charles E. Boice , Barbara A. Hall , Agnes Y. Ngai , Edward F. Westermann
发明人： Charles E. Boice , Barbara A. Hall , Agnes Y. Ngai , Edward F. Westermann
IPC分类号： H04N712
CPC分类号： H04N21/23406 , H04N19/115 , H04N19/137 , H04N19/14 , H04N19/149 , H04N19/15 , H04N19/152 , H04N19/159 , H04N19/172 , H04N19/176 , H04N19/61 , H04N21/23424 , H04N21/44016
摘要： A method to insert or splice new pictures into an existing video stream is provided where the video stream is compressed according to the MPEG-2 video compression standard. The method assures that the new pictures will fit into the encoded stream in the space allotted without running over or under their given bit allocation. The method comprises of steps by which a number of new pictures may be encoded to a precise bit target given the number of free bits in the buffer at the start and end of the splicing, while preventing buffer overruns and under runs.
摘要翻译：提供了将新图像插入或拼接到现有视频流中的方法，其中视频流根据MPEG-2视频压缩标准被压缩。该方法确保新图片将适应分配的空间中的编码流，而不会在给定的位分配下运行。该方法包括以下步骤：为了在剪切的开始和结束时给定缓冲器中的空闲位的数目，可以将多个新图像编码到精确的位目标，同时防止缓冲区溢出和运行。

5. 发明授权

US06823013B1 Multiple encoder architecture for extended search 失效
标题翻译：用于扩展搜索的多编码器架构
公开(公告)号：US06823013B1
公开(公告)日：2004-11-23
申请号：US09046289
申请日：1998-03-23
申请人： Charles E. Boice , John A. Murdock , Agnes Y. Ngai
发明人： Charles E. Boice , John A. Murdock , Agnes Y. Ngai
IPC分类号： H04B166
CPC分类号： H04N19/43 , H04N19/436 , H04N19/57
摘要： An apparatus used for video encoding MPEG compliant digital visual images, having multiple MPEG encoders used in the motion estimation function. The search capabilities used in the motion estimation function of a single MPEG encoder are extended beyond its design limitations as a result of utilizing more than one MPEG encoder. The utilization of multiple encoders effectively creates the capability for a user to specify a wider search window than what is available in a single encoder configuration. The computational search efficency associated with searching the wider window is not adversely affected as a consequence of the multiple processors subdividing the extended window and analyzing each subdivision in parallel.
摘要翻译：一种用于视频编码MPEG兼容数字视觉图像的装置，具有用于运动估计功能的多个MPEG编码器。使用单个MPEG编码器的运动估计功能的搜索能力由于使用多于一个的MPEG编码器而超出其设计限制。多个编码器的利用有效地创建了用户指定比单个编码器配置中可用的更广泛的搜索窗口的能力。与多个处理器细分扩展窗口并并行分析每个细分的结果，与搜索较宽窗口相关联的计算搜索效率不受不利影响。

6. 发明授权

US6097757A Real-time variable bit rate encoding of video sequence employing statistics 失效
标题翻译：使用图像统计的视频序列的实时可变比特率编码
公开(公告)号：US6097757A
公开(公告)日：2000-08-01
申请号：US8282
申请日：1998-01-16
申请人： Charles E. Boice , Adrian S. Butter , Agnes Y. Ngai , Nader Mohsenian , Robert Woodard
发明人： Charles E. Boice , Adrian S. Butter , Agnes Y. Ngai , Nader Mohsenian , Robert Woodard
IPC分类号： H04N7/36 , H04N7/50
CPC分类号： H04N19/182 , H04N19/107 , H04N19/114 , H04N19/124 , H04N19/137 , H04N19/14 , H04N19/149 , H04N19/162 , H04N19/172 , H04N19/186 , H04N19/51 , H04N19/61
摘要： Method, system and computer program product are provided for adaptively encoding in hardware, software or a combination thereof a sequence of video frames in real-time. Pre-encode perceptual activity measurement processing is employed to derive statistics on each frame of the sequence of video frames to be encoded. The statistics are used by variable bit rate logic to obtain a number of bits to be used in encoding each frame. The number of bits to be used is provided to a single encoding engine, which encodes the sequence of video frames and produces a constant quality, variable bit rate bitstream output. The pre-encode processing employs a regulator as the global data flow control and synchronization for the encoder. Perceptual activity analysis on each frame of the sequence of video frames can derive information on, for example, shading, scene change, fade, color, motion and/or edge presence within the frame. Voting gives greater weight to the presence of certain characteristics within the frame.
摘要翻译：提供方法，系统和计算机程序产品，用于在硬件，软件或其组合中自动编码一系列视频帧。采用预编码感知活动测量处理来导出要编码的视频帧序列的每个帧的统计。统计量由可变比特率逻辑用于获得要用于编码每个帧的位数。要使用的比特数被提供给单个编码引擎，其编码视频帧序列并产生恒定质量的可变比特率比特流输出。预编码处理采用调节器作为编码器的全局数据流控制和同步。对视频帧序列的每个帧的感知活动分析可以得到关于帧内的阴影，场景变化，褪色，颜色，运动和/或边缘存在的信息。表决给予框架内存在某些特征的更大的权重。

7. 发明授权

US06961378B1 On-chip dynamic buffer level indicators for digital video encoder 失效
标题翻译：用于数字视频编码器的片上动态缓冲器电平指示器
公开(公告)号：US06961378B1
公开(公告)日：2005-11-01
申请号：US09186584
申请日：1998-11-05
申请人： James D. Greenfield , John M. Kaczmarczyk , Agnes Y. Ngai
发明人： James D. Greenfield , John M. Kaczmarczyk , Agnes Y. Ngai
IPC分类号： H04N7/26 , H04N7/32 , H04N7/46 , H04N7/50
CPC分类号： H04N19/00 , H04N19/152 , H04N19/50 , H04N19/51 , H04N19/577 , H04N19/61
摘要： Method and encoder for encoding a digital video image stream. The encoding includes spatial compression of still images in the video stream and temporal compression between the still images. The spatial compression is carried out by converting a time domain image of a macroblock to a frequency domain image of the macroblock, taking the discrete cosine transform of the frequency domain image, transforming the discrete cosine transformed macroblock image by a quantization factor, and run length encoding the quantized discrete cosine transformed macroblock image. The temporal compression is carried out by reconstructing the run length encoded, quantized, discrete cosine transformed image of the macroblock, searching for a best match macroblock, and constructing a motion vector between them. This forms a bitstream of run length encoded, quantized, discrete cosine transform macroblocks and of motion vectors. This bitstream is passed to and through an external buffer to a transmission medium. The number encoded bits read by a host from the external buffer is fed back to the encoder for calculation in real time of a dynamic buffer level indicator indicative of the fullness of the external buffer. The encoder may generate a BUFFER—EMPTY flag, BUFFER—ALMOST—FULL flag and/or BUFFER—FULL flag for the host.
摘要翻译：用于对数字视频图像流进行编码的方法和编码器。编码包括视频流中的静止图像的空间压缩和静止图像之间的时间压缩。空间压缩通过将宏块的时域图像转换为宏块的频域图像，以频域图像的离散余弦变换为单位，将离散余弦变换的宏块图像变换为量化因子，运行长度对量化的离散余弦变换宏块图像进行编码。通过重建宏块的游程长度编码，量化，离散余弦变换图像，搜索最佳匹配宏块，并在它们之间构建运动矢量来执行时间压缩。这形成游程长度编码，量化，离散余弦变换宏块和运动矢量的比特流。该比特流被传递到外部缓冲器并传送到传输介质。主机从外部缓冲器读取的编码比特数被反馈给编码器，用于实时地计算表示外部缓冲器的饱和度的动态缓冲器级别指示符。编码器可以生成BUFFER EMPTY标志，BUFFER _{- ALMOST _{- FULL标志和/或BUFFER _{- FULL 标志为主机。}}}

8. 发明授权

US07016413B2 Adaptively encoding a picture of contrasted complexity having normal video and noisy video portions 失效
标题翻译：对具有正常视频和嘈杂视频部分的对比度复杂的图像进行自适应编码
公开(公告)号：US07016413B2
公开(公告)日：2006-03-21
申请号：US09046121
申请日：1998-03-20
申请人： Barbara A. Hall , Agnes Y. Ngai , Charles J. Stein , Everett G. Vail, III , Edward F. Westermann
发明人： Barbara A. Hall , Agnes Y. Ngai , Charles J. Stein , Everett G. Vail, III , Edward F. Westermann
IPC分类号： H04N7/12
CPC分类号： H04N19/14 , H04N19/124 , H04N19/149 , H04N19/172 , H04N19/176 , H04N19/61
摘要： A technique is provided for adaptively encoding in hardware, software or a combination thereof a sequence of frames in real time, wherein one or more of the frames includes a random noise portion. The technique includes using statistics analysis to determine whether a current frame includes a random noise portion, and if so, to evaluate and dynamically encode each macroblock thereof based on activity level of the macroblock. Evaluating macroblock activity level includes determining whether its activity level exceeds a predefined threshold indicative of random noise. The macroblock is adaptively encoded by adjusting one or more coding parameters if the macroblock activity level is excessive and its target bitrate is low. For example, when the macroblock is within the random noise portion of the frame, the macroblock is biased towards being coded predictive and an adjusted quantization level is calculated to conserve bits used in encoding the macroblock, thereby moving encode bits from macroblocks within the random noise portion of the frame to macroblocks within the normal portion of the frame.
摘要翻译：提供了一种用于在硬件，软件或其组合中实时自适应地编码帧序列的技术，其中一个或多个帧包括随机噪声部分。该技术包括使用统计分析来确定当前帧是否包括随机噪声部分，并且如果是，则基于宏块的活动级别来评估和动态地对其每个宏块进行编码。评估宏块活动水平包括确定其活动水平是否超过指示随机噪声的预定阈值。如果宏块活动级别过大并且其目标比特率低，则通过调整一个或多个编码参数来自适应地编码宏块。例如，当宏块在帧的随机噪声部分内时，宏块偏向于被编码预测，并且计算调整的量化级别以节省用于编码宏块的比特，从而从随机噪声内的宏块移动编码比特帧的部分到框架的正常部分内的宏块。

9. 发明授权

US06823015B2 Macroblock coding using luminance date in analyzing temporal redundancy of picture, biased by chrominance data 失效
标题翻译：使用亮度日期分析图像的时间冗余的宏块编码，由色度数据偏置
公开(公告)号：US06823015B2
公开(公告)日：2004-11-23
申请号：US10055395
申请日：2002-01-23
申请人： Barbara A. Hall , Agnes Y. Ngai , John M. Sutton , Edward F. Westermann
发明人： Barbara A. Hall , Agnes Y. Ngai , John M. Sutton , Edward F. Westermann
IPC分类号： H04B766
CPC分类号： H04N19/162 , H04N19/107 , H04N19/186 , H04N19/61
摘要： A technique is provided for encoding macroblocks of a frame of a sequence of video frames initially employing luminance data only to analyze temporal redundancy of the macroblocks within the frame. Upon deciding to code at least one macroblock as a non-intra macroblock, the technique includes considering whether to switch the coding decision for the at least one macroblock from non-intra to intra by evaluating chrominance data of the at least one macroblock. The evaluating of the chrominance data can include determining whether chrominance difference data, obtained by comparing chrominance values of a current macroblock with a reference macroblock, is greater than a user set chrominance difference threshold, and if so then the technique includes switching the macroblock coding decision. As a further qualification, the switching might occur only if the chrominance difference data is also greater than the corresponding luminance difference data.
摘要翻译：提供了一种技术，用于对最初采用亮度数据的视频帧序列的帧的宏块进行编码，以分析该帧内的宏块的时间冗余。在决定将至少一个宏块编码为非帧内宏块时，该技术包括考虑是否通过评估至少一个宏块的色度数据来将非至少一个宏块的编码决定从非帧内切换到帧内。色度数据的评估可以包括确定通过将当前宏块的色度值与参考宏块进行比较而获得的色差差数据是否大于用户设置的色差差阈值，如果是，则该技术包括切换宏块编码决策。作为进一步的鉴定，仅当色差差数据也大于对应的亮度差数据时才可能发生切换。

10. 发明授权

US5526054A Apparatus for header generation 失效
标题翻译：用于头部生成的装置
公开(公告)号：US5526054A
公开(公告)日：1996-06-11
申请号：US410951
申请日：1995-03-27
申请人： James D. Greenfield , Diane M. Mauersberg , Agnes Y. Ngai
发明人： James D. Greenfield , Diane M. Mauersberg , Agnes Y. Ngai
IPC分类号： H04N7/26 , H04N7/50 , H04N7/12
CPC分类号： H04N19/61 , H04N19/00 , H04N19/70
摘要： A method for encoding bitstream headers in a processor where templates for the bitstream header are stored in a processor buffer. The templates are addressable by programmable instructions, and the processor has a status register containing a bit for each header type. The status register is modifiable during the encoding process with a data pattern indicating the headers needed for encoding with the bitstream. In this way when a bit is set to 1 the predefined header type is generated and shipped to the bitstream. The header is generated by processing the header buffer template entries associated with the header type.
摘要翻译：一种在处理器中编码比特流报头的方法，其中用于比特流报头的模板被存储在处理器缓冲器中。模板可通过可编程指令进行寻址，并且处理器具有包含每个标题类型的位的状态寄存器。状态寄存器在编码处理期间是可修改的，其中具有指示用比特流进行编码所需的头的数据模式。以这种方式，当一个位设置为1时，生成预定义的标题类型并将其发送到比特流。通过处理与报头类型相关联的报头缓冲区模板条目来生成报头。

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