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公开(公告)号：US5818877A
公开(公告)日：1998-10-06
申请号：US622659
申请日：1996-03-26
申请人： Min-Jen Tsai , John D. Villasenor , Feng Chen
发明人： Min-Jen Tsai , John D. Villasenor , Feng Chen
CPC分类号： H03M7/4006 , H03M7/40 , H03M7/46
摘要： A method generates a reduced number of values representing a sequence of grouped data values and partitions the reduced number of values by first mapping data values into groups of symbols and then partitioning the resulting stream of symbols. The digits representing the first data value in each group are replaced with symbols from a first alphabet. The most significant digit of the second data value in each group and the sign of that second data value are also represented by a symbol from the first symbol set, while the remaining significant bits of the second data value in each group are represented by symbols from a second symbol set. A stream of symbols which represent a sequence of grouped data values is partitioned into first partition symbol groups and second partition symbol groups. Each first partition symbol group comprises the symbols representing the first data value in each group and also the symbol representing the least significant bit of the second data value which follows. Each second partition symbol group comprises the symbols representing all digits of a second data value excluding the symbol which represented the least significant digits.
摘要翻译： 一种方法生成表示分组数据值序列的减少数量的值，并且通过首先将数据值映射到符号组，然后划分所得到的符号流，来分割减少数量的值。 表示每组中第一个数据值的数字将被替换为来自第一个字母表的符号。 每个组中的第二数据值的最高有效位和该第二数据值的符号也由来自第一符号集的符号表示，而每组中的第二数据值的剩余有效位由 第二个符号集。 表示分组数据值序列的符号流被划分成第一分区符号组和第二分区符号组。 每个第一分区符号组包括表示每个组中的第一数据值的符号，以及表示随后的第二数据值的最低有效位的符号。 每个第二分区符号组包括表示不包括表示最低有效数字的符号的第二数据值的全部数字的符号。
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公开(公告)号：US20110225651A1
公开(公告)日：2011-09-15
申请号：US13042233
申请日：2011-03-07
申请人： John D. Villasenor , Lok Won Kim
发明人： John D. Villasenor , Lok Won Kim
CPC分类号： G06F21/85
摘要： A method of securing bus architecture from a Trojan attack. A restricted address access detector generates an unauthorized access detection, signal when a master ID signal is within a restricted range. The unauthorized access detection signal disables the requested slave select signal, and the address decoder instead outputs a default slave select signal. A counter determines the duration of a lock signal from a master, and a comparator activates a malicious bus lock signal if the lock signal duration exceeds a threshold. The master mask register forcibly gates the lock signal upon receipt of the malicious bus lock signal. If the duration of a wait request from a slave exceeds a maximum duration register value, a comparator activates a malicious wait detection signal to disable the wait request signal. The method might include storing identifying information about the malicious master and storing a slave ID corresponding to the malicious slave.
摘要翻译： 一种从总线架构防止木马攻击的方法。 受限地址访问检测器产生未授权访问检测，当主ID信号处于受限范围内时发出信号。 未经授权的访问检测信号禁止所请求的从选择信号，并且地址解码器代替地输出默认的从选择信号。 计数器确定来自主机的锁定信号的持续时间，并且如果锁定信号持续时间超过阈值，则比较器激活恶意总线锁定信号。 主屏蔽寄存器在接收到恶意总线锁定信号时强制锁定锁定信号。 如果来自从机的等待请求的持续时间超过最大持续时间寄存器值，则比较器激活恶意等待检测信号以禁用等待请求信号。 该方法可以包括存储关于恶意主控的识别信息并存储与恶意从属对应的从属ID。
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公开(公告)号：USRE40372E1
公开(公告)日：2008-06-10
申请号：US10862912
申请日：2004-06-08
IPC分类号： H04N7/18
CPC分类号： H04N19/895 , H04N19/51 , H04N19/89
摘要： A motion vector prediction method in an error resilient mode. In the motion vector prediction method capable of decoding backwards, motion vectors of macro blocks are calculated, and motion vectors of macro blocks each having one motion vector are predicted while moving to another macro block from left to right, and motion vectors of macro blocks each having four motion vectors are continuously predicted in a predetermined sequence to have correlation in prediction of the four motion vectors. Thus, in the motion vector prediction method based on the image signal compression method of the MPEG-4 or H.263 standard, the motion vector prediction is performed with continuity and correlation among the motion vectors, so that two-way decoding is possible during transmission of blocks with a predetermined packet, resulting in better error resilient characteristics.
摘要翻译： 一种错误弹性模式的运动矢量预测方法。 在能够向后方解码的运动矢量预测方法中，计算宏块的运动矢量，并且从左到右移动到另一宏块时预测具有一个运动矢量的宏块的运动矢量，并且每个宏块的运动矢量 具有四个运动矢量以预定的顺序连续地预测以在四个运动矢量的预测中具有相关性。 因此，在基于MPEG-4或H.263标准的图像信号压缩方法的运动矢量预测方法中，以运动矢量之间的连续性和相关性来执行运动矢量预测，使得可以在 传输具有预定分组的块，导致更好的错误弹性特性。
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公开(公告)号：US07532669B2
公开(公告)日：2009-05-12
申请号：US10374993
申请日：2003-02-28
IPC分类号： H04N7/12
CPC分类号： G11B20/12 , H04N19/13 , H04N19/166 , H04N19/184 , H04N19/517 , H04N19/61 , H04N19/66 , H04N19/68 , H04N19/69 , H04N19/70 , H04N19/89
摘要： A video coding-decoding (CODEC) method in an error resilient mode, a computer readable medium having a computer program for the video CODEC method, and a video CODEC apparatus. The video CODEC method provides more resilience against channel error such that communications are less affected by error under conditions in which errors are a serious problem such as in a wireless communications channel. In the video CODEC method, a header data part (HDP) bit region, a motion vector data part (MVDP) bit region and a discrete cosine transform data part (DDP) bit regions are partitioned from each macro block of the video data in an error resilient mode, and then the partitioned bit regions are variable-length-coded. Then, the bit regions selected from the variable-length coded bit regions according to a predetermined priority for recovery are reversible-variable-length-coded, and markers are then inserted into the variable-length coded or reversible-variable-length-coded bit regions.
摘要翻译： 具有错误弹性模式的视频编码解码（CODEC）方法，具有用于视频CODEC方法的计算机程序的计算机可读介质和视频CODEC装置。 视频CODEC方法提供针对信道错误的更大的弹性，使得在诸如无线通信信道中的错误是严重问题的条件下，通信较少受到错误的影响。 在视频编解码方法中，将标题数据部分（HDP）位区域，运动矢量数据部分（MVDP）位区域和离散余弦变换数据部分（DDP）位区域从视频数据的每个宏块分割成 错误弹性模式，然后分区位区域是可变长度编码的。 然后，根据用于恢复的预定优先级从可变长度编码比特区域中选择的比特区域是可逆可变长度编码的，然后将标记插入到可变长度编码或可逆可变长度编码比特 地区。
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公开(公告)号：US07177355B1
公开(公告)日：2007-02-13
申请号：US09203672
申请日：1998-12-01
IPC分类号： H04B1/66
摘要： A method of representing encoding or non-encoding by extending a video information field of a block when coding video information, is provided. The method of representing encoding or non-encoding by extending an information field for representing encoding or non-encoding is applied to an error allowable mode. Also, the amount of bits depending on the characteristics of video information to be encoded can be reduced. In this method, an image is encoded by extending a code (COD) field which is used in H.263 and MPEG-4 to indicate the cases where neither a motion vector (MV) nor a discrete cosine transform (DCT) value are encoded, where both the MV and the DCT value are encoded, and where only the MV is encoded. Therefore, in a channel with errors, the extended OCD field can be used in the error allowable mode. Also, video information can be encoded using a smaller amount of bits where the motion of an image is constant, than in the conventional art.
摘要翻译： 提供了一种通过在编码视频信息时扩展块的视频信息字段来表示编码或非编码的方法。 通过扩展用于表示编码或非编码的信息字段来表示编码或非编码的方法被应用于错误允许模式。 此外，可以减少取决于要编码的视频信息的特性的比特量。 在该方法中，通过扩展在H.263和MPEG-4中使用的代码（COD）字段来编码图像，以指示不对运动矢量（MV）和离散余弦变换（DCT）值进行编码的情况 ，其中MV和DCT值都被编码，并且其中只有MV被编码。 因此，在具有错误的通道中，扩展OCD字段可以在错误允许模式下使用。 此外，与传统技术相比，可以使用图像的运动不变的较少量的位来编码视频信息。
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公开(公告)号：US07340671B2
公开(公告)日：2008-03-04
申请号：US10961132
申请日：2004-10-08
IPC分类号： G06F11/00
CPC分类号： H03M13/658 , H03M13/1114 , H03M13/6583
摘要： The present invention includes a technique for updating messages that originate at the constraint nodes of bi-partite graphs in Low Density Parity Check codes. The technique computes only two outgoing magnitudes at each constraint node and exhibits no measurable performance loss as compared to exact belief propagation which computes a unique magnitude for each departing edge from a given constraint node. The technique eliminates the need for memory based table look-up in the constraint node processing and has been implemented, in one embodiment, using only shift, add, and comparison operations.
摘要翻译： 本发明包括一种用于更新源于低密度奇偶校验码中双分图的约束节点的消息的技术。 该技术仅在每个约束节点处仅计算两个输出量值，并且与从给定约束节点计算每个出发边缘的唯一量值的精确置信传播相比，不显示可测量的性能损失。 该技术消除了在约束节点处理中对基于存储器的表查找的需要，并且在一个实施例中已经实现了仅使用移位，添加和比较操作。
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公开(公告)号：US06768775B1
公开(公告)日：2004-07-27
申请号：US09201865
申请日：1998-12-01
IPC分类号： H04N712
CPC分类号： G11B20/12 , H04N19/13 , H04N19/166 , H04N19/184 , H04N19/517 , H04N19/61 , H04N19/66 , H04N19/68 , H04N19/69 , H04N19/70 , H04N19/89
摘要： A video coding-decoding (CODEC) method in an error resilient mode, a computer readable medium having a computer program for the video CODEC method, and a video CODEC apparatus. The video CODEC method provides more resilience against channel error such that communications are less affected by error under conditions in which errors are a serious problem such as in a wireless communications channel. In the video CODEC method, a header data part (HDP) bit region, a motion vector data part (MVDP) bit region and a discrete cosine transform data part (DDP) bit regions are partitioned from each macro block of the video data in an error resilient mode, and then the partitioned bit regions are variable-length-coded. Then, the bit regions selected from the variable-length coded bit regions according to a predetermined priority for recovery are reversible-variable-length-coded, and markers are then inserted into the variable-length coded or reversible-variable-length-coded bit regions.
摘要翻译： 具有错误弹性模式的视频编码解码（CODEC）方法，具有用于视频CODEC方法的计算机程序的计算机可读介质和视频CODEC装置。 视频CODEC方法提供针对信道错误的更大的弹性，使得在诸如无线通信信道中的错误是严重问题的条件下，通信较少受到错误的影响。 在视频编解码方法中，将标题数据部分（HDP）位区域，运动矢量数据部分（MVDP）位区域和离散余弦变换数据部分（DDP）位区域从视频数据的每个宏块分割成 错误弹性模式，然后分区位区域是可变长度编码的。 然后，根据用于恢复的预定优先级从可变长度编码比特区域中选择的比特区域是可逆可变长度编码的，然后将标记插入到可变长度编码或可逆可变长度编码比特 地区。
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公开(公告)号：US06426976B1
公开(公告)日：2002-07-30
申请号：US09201816
申请日：1998-12-01
IPC分类号： H04N718
CPC分类号： H04N19/895 , H04N19/51 , H04N19/89
摘要： A motion vector prediction method in an error resilient mode. In the motion vector prediction method capable of decoding backwards, motion vectors of macro blocks are calculated, and motion vectors of macro blocks each having one motion vector are predicted while moving to another macro block from left to right, and motion vectors of macro blocks each having four motion vectors are continuously predicted in a predetermined sequence to have correlation in prediction of the four motion vectors. Thus, in the motion vector prediction method based on the image signal compression method of the MPEG-4 or H.263 standard, the motion vector prediction is performed with continuity and correlation among the motion vectors, so that two-way decoding is possible during transmission of blocks with a predetermined packet, resulting in better error resilient characteristics.
摘要翻译： 一种错误弹性模式的运动矢量预测方法。 在能够向后方解码的运动矢量预测方法中，计算宏块的运动矢量，并且从左到右移动到另一宏块时预测具有一个运动矢量的宏块的运动矢量，并且每个宏块的运动矢量 具有四个运动矢量以预定的顺序连续地预测以在四个运动矢量的预测中具有相关性。 因此，在基于MPEG-4或H.263标准的图像信号压缩方法的运动矢量预测方法中，以运动矢量之间的连续性和相关性来执行运动矢量预测，使得可以在 传输具有预定分组的块，导致更好的错误弹性特性。
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