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。

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。

公开(公告)号：US06922441B2

公开(公告)日：2005-07-26

申请号：US09853508

申请日：2001-05-11

申请人： Charles Boice ,  Everett G. Vail, III

发明人： Charles Boice ,  Everett G. Vail, III

IPC分类号： H04N7/50 ,  H04N21/234 ,  H04N21/44 ,  H04N7/12 ,  H04N11/02

CPC分类号： H04N21/23406 ,  H04N19/112 ,  H04N19/152 ,  H04N19/172 ,  H04N19/196 ,  H04N19/197 ,  H04N19/42 ,  H04N19/61 ,  H04N21/44004

摘要： A method and structure for performing a sequence of integer divides without propagation of truncation error. During encoding and decoding of video signals, a buffer is dynamically filled with binary bits of encoded video data at a variable rate, and the data is subsequently removed from the buffer at a constant rate. Calculating the number of bits removed from the buffer as each video frame is processed requires integer divides with consequent truncation of the quotient. An accumulator is utilized for each integer divide to cumulatively store remainders generated by successive integer divides. If the accumulator accumulates to a value (A) that is no less than the divisor (D) of the associated integer divide, then the quotient is effectively increased by 1, and A is decremented by D, which compensates for the prior truncations and avoids a buffer overflow violation that may otherwise occur.

摘要翻译： 用于执行整数除序的方法和结构，而不会产生截断误差的传播。 在视频信号的编码和解码期间，缓冲器以可变速率动态地填充编码视频数据的二进制位，并且数据随后以恒定速率从缓冲器中移除。 在处理每个视频帧时，计算从缓冲区中删除的位数需要整数除数，从而对商进行截断。 每个整数除法使用累加器来累积存储由连续整数除法产生的余数。 如果累加器累加到不小于关联整数除数的除数（D）的值（A），则商将有效地增加1，并且A减少D，其补偿先前的截断并避免 可能会发生缓冲区溢出违例。

公开(公告)号：US5406197A

公开(公告)日：1995-04-11

申请号：US923307

申请日：1992-07-31

申请人： Stephen J. Mercier ,  Everett G. Vail, III

发明人： Stephen J. Mercier ,  Everett G. Vail, III

IPC分类号： G01R31/317 ,  G01R31/3185 ,  G01R31/28

CPC分类号： G01R31/318505 ,  G01R31/31701

摘要： A circuit reduces the cost of electronic systems that contain integrated circuit chips with test leads by reducing the number of off-module connections required to drive these test leads in the assembled system. Instead of driving each such test lead through an intermodule interconnector, a single MODULE TEST line coming in through the intermodule interconnector is input to a circuit that then drives all chip test leads to an appropriate state in the assembled system, while leaving those test leads in a high-impedance state during test, allowing a module tester to drive them as required by its test program.

摘要翻译： 电路通过减少在组装的系统中驱动这些测试引线所需的断开模块连接的数量，降低了带有测试引线的集成电路芯片的电子系统的成本。 代替驱动每个这样的测试引线通过模块间互连器，通过模块间互连器进入的单个模块测试线路被输入到电路，然后将所有芯片测试引线驱动到组装系统中的适当状态，同时将这些测试引线 在测试期间是高阻抗状态，允许模块测试人员按照测试程序的要求驱动它们。