公开(公告)号：US5864637A

公开(公告)日：1999-01-26

申请号：US423912

申请日：1995-04-18

申请人： Yi Liu ,  Michael R. Tucker ,  Geoffrey S. Strongin

发明人： Yi Liu ,  Michael R. Tucker ,  Geoffrey S. Strongin

IPC分类号： G06T9/00 ,  H04N7/26 ,  H04N7/30 ,  G06K9/36

CPC分类号： H04N19/132 ,  H04N19/14 ,  H04N19/176 ,  H04N19/18 ,  H04N19/44 ,  H04N19/48 ,  H04N19/59

摘要： A video system examines the transform domain content of various spatially related blocks in a compressed video bitstream to determine whether predetermined types of similarities exist between multiple blocks. When certain selected similarities are found, the video system spatially combines the blocks in a predetermined manner. In some embodiments, DCT coefficients of a plurality of blocks are averaged to form one averaged block and the averaged block is inverse discrete cosine transformed. The averaged and IDCT transformed block is written to the display at the position of each of the averaged blocks. In some embodiments, a representative block of a plurality of DCT coefficient blocks is selected and inverse discrete cosine transformed. The selected and IDCT transformed block is written to the display at the position of each of the plurality of blocks.

摘要翻译： 视频系统检查压缩视频比特流中各种空间相关块的变换域内容，以确定在多个块之间是否存在预定类型的相似性。 当找到某些所选择的相似性时，视频系统以预定的方式空间地组合这些块。 在一些实施例中，多个块的DCT系数被平均以形成一个平均块，并且平均块是逆离散余弦变换的。 平均和IDCT变换的块被写入每个平均块的位置处的显示。 在一些实施例中，选择多个DCT系数块的代表性块并进行逆离散余弦变换。 所选择的和IDCT变换的块被写入到多个块中的每一个的位置处的显示器。

公开(公告)号：US5809173A

公开(公告)日：1998-09-15

申请号：US424739

申请日：1995-04-18

申请人： Yi Liu ,  Michael R. Tucker ,  Geoffrey S. Strongin

发明人： Yi Liu ,  Michael R. Tucker ,  Geoffrey S. Strongin

IPC分类号： G06T9/00 ,  H04N7/30 ,  H04N7/46 ,  G06K9/36 ,  G06K9/46 ,  H04N7/12

CPC分类号： H04N19/577 ,  H04N19/60

摘要： An video decoder system, such as for use with MPEG video compression, uses a previous B-frame as an additional prediction source for the current B-frame. In one embodiment, a given block within a current B-frame "N" reuses IDCT result terms from the previous B-frame "N-1" if they are determined to be "similar enough" to the anticipated IDCT result terms which would otherwise need to be computed. For a given block, each of the "M" lowest-frequency DCT coefficients for B-frame "N" and B-frame "N-1" are respectively compared: if they differ by less than a similarity threshold value, then the IDCT result terms from the previous B-frame "N-1" are reused without further computation. The similarity threshold may be adaptively adjusted to reduce the computational burden of video decompression, while affording a gradual degradation of picture quality, rather than wholesale skipping of entire frames.

摘要翻译： 诸如用于MPEG视频压缩的视频解码器系统使用先前的B帧作为当前B帧的附加预测源。 在一个实施例中，当前的B帧“N”中的给定块重新使用来自先前B帧“N-1”的IDCT结果项，如果它们被确定为与预期的IDCT结果项“足够相似” 需要计算。 对于给定的块，分别比较用于B帧“N”和B帧“N-1”的“M”个最低频率DCT系数中的每一个，如果它们相差小于相似性阈值，则IDCT 来自前一个B帧“N-1”的结果项被重新使用，无需进一步的计算。 可以自适应地调整相似性阈值，以减少视频解压缩的计算负担，同时提供图像质量的逐渐劣化，而不是批量跳过整个帧。

公开(公告)号：US6075918A

公开(公告)日：2000-06-13

申请号：US548539

申请日：1995-10-26

申请人： Geoffrey S. Strongin ,  Yi Liu ,  Michael R. Tucker

发明人： Geoffrey S. Strongin ,  Yi Liu ,  Michael R. Tucker

IPC分类号： H04N5/85 ,  H04N7/26 ,  H04N9/804 ,  H04N5/76

CPC分类号： H04N9/8042 ,  H04N19/40 ,  H04N5/85

摘要： A video decoder system affords playback of video information corresponding to a compressed video bitstream which demands less processor performance than would be demanded for decoding the compressed video bitstream itself. One embodiment includes preprocessing and partially decoding the compressed video bitstream, and retaining the partially-decoded information for subsequent playback. In another embodiment the compressed video bitstream is preprocessed and information useful for increasing the processing speed is retained for subsequent playback. Either embodiment may be used alone, or both may be used together. The information useful for increasing the processing speed which is retained for subsequent playback may be retained by creating an intermediate video bitstream which may include partially decoded information from the compressed video bitstream as well as the information useful for increasing the processing speed of the video information. The intermediate video bitstream may be stored on a system hard disk where it may be read much faster than if stored on a CD-ROM and may be deleted when not needed.

摘要翻译： 视频解码器系统提供与压缩视频比特流相对应的视频信息的重放，其需要的处理器性能要比对压缩视频比特流本身进行解码所要求的低。 一个实施例包括对压缩视频比特流进行预处理和部分解码，并保留用于后续重放的部分解码的信息。 在另一个实施例中，压缩视频比特流被预处理，并且保留用于增加处理速度的信息用于随后的回放。 任一个实施方案可以单独使用，或者两者可以一起使用。 可以通过创建可以包括来自压缩视频比特流的部分解码的信息的中间视频比特流以及用于增加视频信息的处理速度的信息来保持用于增加用于随后重放所保留的处理速度的信息。 中间视频比特流可以存储在系统硬盘上，其可以读取比存储在CD-ROM上的速度快得多，并且可以在不需要时被删除。

公开(公告)号：US5982936A

公开(公告)日：1999-11-09

申请号：US892551

申请日：1997-07-14

申请人： Michael R. Tucker ,  Geoffrey S. Strongin ,  Yi Liu

发明人： Michael R. Tucker ,  Geoffrey S. Strongin ,  Yi Liu

IPC分类号： H04N7/26 ,  H04N7/50 ,  G06K9/36

CPC分类号： H04N19/433 ,  H04N19/423 ,  H04N19/61

摘要： A video decoding system that selectively arranges video information within a memory to correspond to macroblocks of video information. Such a system advantageously increases the efficiency of processing video information when decoding compressed video information.

摘要翻译： 一种视频解码系统，其选择性地将视频信息布置在存储器内以对应于视频信息的宏块。 这样的系统有利地提高了解码压缩视频信息时处理视频信息的效率。

公开(公告)号：US5953457A

公开(公告)日：1999-09-14

申请号：US887678

申请日：1997-07-03

申请人： Michael R. Tucker ,  Geoffrey S. Strongin ,  Yi Liu

发明人： Michael R. Tucker ,  Geoffrey S. Strongin ,  Yi Liu

IPC分类号： G06T9/00 ,  H04N7/26 ,  H04N7/50 ,  G06K9/36 ,  G06K9/46 ,  H04N7/12

CPC分类号： H04N19/85 ,  H04N19/42 ,  H04N19/61

摘要： A video decoding apparatus and method greatly reduces the computational burden of video decoding by processing several pixels in parallel, thereby reducing the computational load by a factor approximating the number of pixels processed at one time.

摘要翻译： 视频解码装置和方法通过并行处理几个像素大大减少了视频解码的计算负担，从而通过逼近一次处理的像素数来减少计算负荷。

公开(公告)号：US5903313A

公开(公告)日：1999-05-11

申请号：US424019

申请日：1995-04-18

申请人： Michael R. Tucker ,  Geoffrey S. Strongin ,  Yi Liu

发明人： Michael R. Tucker ,  Geoffrey S. Strongin ,  Yi Liu

IPC分类号： H04N7/36 ,  H04N7/18

CPC分类号： H04N19/51

摘要： A method of adaptively performing motion compensation in a video processing apparatus is provided. The video processing apparatus processes macroblocks of compressed video information. Some of these macroblocks have motion vectors associated therewith. The method is conveniently implemented on a general purpose computer in one embodiment. In accordance with the disclosed method, the performance of the processor in the computer is monitored and a measurement of this performance is made. A threshold dependent on the measured processor performance is then set. For those macroblocks which have motion vectors associated therewith, the magnitude of the motion vector is determined. If the magnitude of the motion vector of a particular macroblock exceeds the threshold, then motion compensation is performed on that macroblock. However, if the magnitude of the motion vectors or motion vectors associated with a particular macroblock do not exceed the threshold, then no motion compensation is performed. The processor is thus relieved from the computational burden of performing motion compensation on a significant number of macroblocks.

摘要翻译： 提供了一种在视频处理设备中自适应地执行运动补偿的方法。 视频处理装置处理压缩视频信息的宏块。 这些宏块中的一些具有与其相关联的运动向量。 该方法在一个实施例中在通用计算机上方便地实现。 根据所公开的方法，监视计算机中的处理器的性能并进行该性能的测量。 然后设置取决于测量的处理器性能的阈值。 对于具有与其相关联的运动矢量的那些宏块，确定运动矢量的大小。 如果特定宏块的运动矢量的大小超过阈值，则对该宏块执行运动补偿。 然而，如果与特定宏块相关联的运动矢量或运动矢量的大小不超过阈值，则不执行运动补偿。 因此，处理器免于在大量宏块上执行运动补偿的计算负担。

公开(公告)号：US5774600A

公开(公告)日：1998-06-30

申请号：US424028

申请日：1995-04-18

申请人： Geoffrey S. Strongin ,  Yi Liu ,  Michael R. Tucker

发明人： Geoffrey S. Strongin ,  Yi Liu ,  Michael R. Tucker

IPC分类号： G06T5/20 ,  G06T9/00 ,  G09G5/393 ,  H04N5/14 ,  H04N5/44 ,  H04N7/26 ,  H04N7/50 ,  G06K9/36

CPC分类号： G09G5/393 ,  G06T5/20 ,  H04N19/42 ,  H04N19/61 ,  H04N5/14 ,  H04N5/4401

摘要： A method of pixel averaging is disclosed which advantageously employs a relatively low number of registers, relatively few memory accesses and a relatively low number of steps. A first register is loaded with a first sequence of pixel values which are to be averaged with a second sequence of pixel values loaded into a second register. The pixel values of the first sequence are stored in respective segments of the first register and the pixel values of the second sequence are stored in respective segments of the second register. The pixel values in the first and second registers are shifted to the right by one. The most significant bit of each of the segments of the first register and the most significant bit of each of the segments of the second register are masked. First masked quotients are thus obtained in each of the segments of the first register and second masked quotients are thus obtained in each of the segments of the second register. The first masked quotients in the segments of the first register are added to respective second masked quotients in the second register to obtain a plurality of pixel value averages.

摘要翻译： 公开了一种像素平均的方法，其有利地采用相对较少数量的寄存器，相对较少的存储器访问和相对较少数量的步骤。 加载第一序列的像素值，其将被加载到第二寄存器中的第二像素值序列进行平均。 第一序列的像素值存储在第一寄存器的相应段中，并且第二序列的像素值存储在第二寄存器的相应段中。 第一和第二寄存器中的像素值向右移位1。 第一寄存器的每个段的最高有效位和第二寄存器的每个段的最高有效位被屏蔽。 因此，在第一寄存器的每个段中获得第一掩蔽商，并且因此在第二寄存器的每个段中获得第二掩蔽商。 将第一寄存器的段中的第一被掩蔽商加到第二寄存器中的相应的第二掩蔽商，以获得多个像素值平均值。

公开(公告)号：US6002801A

公开(公告)日：1999-12-14

申请号：US423913

申请日：1995-04-18

申请人： Geoffrey S. Strongin ,  Yi Liu ,  Michael R. Tucker

发明人： Geoffrey S. Strongin ,  Yi Liu ,  Michael R. Tucker

IPC分类号： G06T9/00 ,  H04N7/26 ,  H04N7/30 ,  G06K9/36 ,  G06K9/40 ,  G11B7/00 ,  H04N11/02

CPC分类号： H04N19/126 ,  H04N19/60 ,  H04N19/124

摘要： A video decoding system examines a block of DCT coefficients prior to computation of an inverse discrete cosine transform (IDCT) to determine the number of nonzero coefficients. A plurality of IDCT engines are available in the video system including an IDCT engine utilizing fewer computations for a sparse picture and an IDCT engine utilizing fewer computations for a nonsparse picture. The video decoding system selects an IDCT engine to minimize the number of computations performed and to thereby reduce the computational burden of IDCT transformation.

摘要翻译： 视频解码系统在计算逆离散余弦变换（IDCT）之前检查DCT系数块，以确定非零系数的数量。 多个IDCT引擎在视频系统中是可用的，包括利用对稀疏图像的较少计算的IDCT引擎和利用对非粗糙图像的较少计算的IDCT引擎。 视频解码系统选择IDCT引擎来最小化所执行的计算次数，从而降低IDCT变换的计算负担。

公开(公告)号：US5872866A

公开(公告)日：1999-02-16

申请号：US423914

申请日：1995-04-18

申请人： Geoffrey S. Strongin ,  Yi Liu ,  Michael R. Tucker

发明人： Geoffrey S. Strongin ,  Yi Liu ,  Michael R. Tucker

IPC分类号： G06T9/00 ,  H04N7/26 ,  H04N7/30 ,  G06K9/36 ,  G06F17/14 ,  H04N1/40 ,  H04N7/12

CPC分类号： H04N19/44 ,  H04N19/60

摘要： A decoding system stores frequently-occurring DCT coefficient blocks in a memory and stores pre-computed spatial domain kernels which correspond to the stored DCT coefficient blocks. The video system examines a block of DCT coefficients prior to computation of an inverse discrete cosine transform (IDCT) to determine whether the block is substantially similar to a stored frequently-occurring DCT coefficient block. If so, the spatial domain kernel corresponding to the frequently-occurring DCT block is utilized in the decoded picture, bypassing computation of the IDCT.

摘要翻译： 解码系统将频繁出现的DCT系数块存储在存储器中，并且存储与所存储的DCT系数块相对应的预先计算的空间域内核。 视频系统在计算逆离散余弦变换（IDCT）之前检查DCT系数块，以确定该块是否基本上类似于存储的频繁出现的DCT系数块。 如果是这样，则在经解码的图像中利用与频繁出现的DCT块对应的空间域核心，从而绕过IDCT的计算。

公开(公告)号：US5768536A

公开(公告)日：1998-06-16

申请号：US548538

申请日：1995-10-26

申请人： Geoffrey S. Strongin ,  Yi Liu ,  Michael R. Tucker

发明人： Geoffrey S. Strongin ,  Yi Liu ,  Michael R. Tucker

IPC分类号： H04N7/173 ,  H04N7/26 ,  H04N9/804 ,  H04N9/79 ,  H04N9/797

CPC分类号： H04N9/8042 ,  H04N19/40 ,  H04N7/17336

摘要： A video decoder system affords playback of video information corresponding to a compressed video bitstream while demanding less processor performance than traditionally required. One method embodiment includes preprocessing the compressed video bitstream to generate a secondary video bitstream which includes information useful for decoding the compressed video bitstream in a more processor efficient manner than would be achievable by decoding the compressed video bitstream alone. The secondary video bitstream is then stored for use during a subsequent playback mode. When in the playback mode, the compressed video bitstream is decoded by processing both the compressed video bitstream together with the secondary video bitstream. The secondary video bitstream may be stored on a system hard disk where it may be read much faster than if stored on a CD-ROM and may be deleted when not needed.

摘要翻译： 视频解码器系统提供与压缩视频比特流相对应的视频信息的重放，同时要求比传统上要求的处理器性能要低。 一种方法实施例包括预处理压缩视频比特流以产生辅助视频比特流，其包括以比以单独解码压缩视频比特可实现的更高处理器效率的方式对压缩视频比特流进行解码的信息。 然后存储辅助视频比特流以在随后的播放模式期间使用。 当处于播放模式时，通过将压缩视频比特流与次要视频比特流一起处理来解码压缩视频比特流。 次要视频比特流可以存储在系统硬盘上，其可以读取比存储在CD-ROM上的速度更快，并且可以在不需要时被删除。