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公开(公告)号：US5404139A
公开(公告)日：1995-04-04
申请号：US924925
申请日：1992-08-05
CPC分类号： H03M7/425
摘要： A serial data decoder is described for decoding interleaved variable length and fixed length codes. The decoder includes a state machine which moves between a branching hierarchy of states in dependence upon the bits of received serial data. When the state machine reaches a state corresponding to a complete variable length code having been received, it then enters a delay state lasting for the length of time necessary to receive the following fixed length code prior to return to a reset state. The state machine can be implemented using a static ram 10 storing data including pointers for controlling the movements between states.
摘要翻译： 描述串行数据解码器用于解码交织的可变长度和固定长度码。 解码器包括根据所接收的串行数据的比特在状态的分支层次之间移动的状态机。 当状态机达到对应于已经接收到的完整可变长度代码的状态时，它然后在返回到复位状态之前进入持续所需时间长度的延迟状态，以接收以下固定长度代码。 状态机可以使用存储包括用于控制状态之间的移动的指针的数据的静态压头10来实现。
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2.发明授权Digital signal recording and/or reproducing apparatus that evenly distributes field data across tracks 失效数字信号记录和/或再现装置，其在轨道上均匀地分配场数据
公开(公告)号：US5506687A
公开(公告)日：1996-04-09
申请号：US286386
申请日：1994-08-04
申请人： Clive H. Gillard , James H. Wilkinson , Michael J. Ludgate , Jonathan M. Soloff , Rajan Bhandari , Terence R. Hurley
发明人： Clive H. Gillard , James H. Wilkinson , Michael J. Ludgate , Jonathan M. Soloff , Rajan Bhandari , Terence R. Hurley
IPC分类号： G11B20/12 , B82B1/00 , H04N5/7826 , H04N5/92 , H04N5/926 , H04N7/24 , H04N9/797 , H04N9/80 , H04N9/804 , H04N9/808 , H04N9/88 , H04N9/888 , H04N9/79 , G11B5/02
CPC分类号： H04N5/926 , H04N5/78266 , H04N9/7973 , H04N9/8042 , H04N9/888 , H04N2009/8084
摘要： A digital video tape recording/playback system having a plurality of recording heads (A, B, C, D) on a rotating head mechanism 94 for recording slanting tracks 108 which extend diagonally across a tape 82 provides processing of video signals in a plurality of data processing channels with selective connection of the data processing channels to the recording heads such that data from a plurality of data processing channels are stored in respective portions of a slanting track (A+/A-; B+/B-; C+/C-; D+/D-). The data in each data processing channel and recorded in each track portion is sampled with a substantially even distribution over a field of video signals to provide for effective concealment of recording/playback errors. Preferably, two data processing channels are recorded on each track, the respective portions being located in upper and lower portions of the tape, respectively.
摘要翻译： 一种在旋转磁头机构94上具有多个记录头（A，B，C，D）的数字录像带记录/重放系统，用于记录沿着磁带82斜对角延伸的倾斜磁道108， 数据处理通道，数据处理通道选择性地连接到记录头，使得来自多个数据处理通道的数据被存储在倾斜磁道的相应部分（A + / A-; B + / B-; C + / C-; D + / D-）。 每个数据处理通道中记录在每个磁道部分中的数据在视频信号的场上以基本均匀的分布进行采样，以提供有效的隐藏记录/重放错误。 优选地，在每个轨道上记录两个数据处理通道，各个部分分别位于磁带的上部和下部。
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公开(公告)号：US5260781A
公开(公告)日：1993-11-09
申请号：US885853
申请日：1992-05-20
CPC分类号： H04N19/136 , H04N19/129 , H04N19/176 , H04N19/63 , H04N19/13 , H04N19/91
摘要： A data compression system in which decorrelated data is fed to an entropy encoder (20) in batches having an internal monotonic decrease in average information content from start to end. This results in longer zero runs and more rapid attainment of end of block codes. A data sequencing circuit (18) comprising nested inter-sub band (60) and intra-sub band (72) counters for use with sub band filtered video data is also described.
摘要翻译： 一种数据压缩系统，其中去相关数据被批量地馈送到熵编码器（20），其具有从开始到结束的平均信息内容的内部单调降低。 这导致更长的零运行和更快速地获得块代码的结束。 还描述了包括用于与子带滤波的视频数据一起使用的嵌套子频带（60）和子频带（72）计数器的数据排序电路（18）。
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公开(公告)号：US5268905A
公开(公告)日：1993-12-07
申请号：US885863
申请日：1992-05-20
CPC分类号： H03H17/0664 , H03H17/0266
摘要： A sub-band filter system in which the frequency separated data is multiplexed together at the output of each filter stage. The stream of multiplexed data produced can have a block-by-block format or a sample-by-sample format. In the latter case, the filtering can be effected by a finite impulse response filter with switchable tap coefficients for effecting both decimation and high and low pass filtering.
摘要翻译： 频带分离数据在每个滤波器级的输出端被多路复用的子带滤波器系统。 所生成的复用数据流可以具有逐块格式或逐个样本格式。 在后一种情况下，可以通过具有可切换抽头系数的有限脉冲响应滤波器来实现滤波，以实现抽取和高通和低通滤波。
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公开(公告)号：US5384869A
公开(公告)日：1995-01-24
申请号：US957159
申请日：1992-10-07
CPC分类号： G06F17/175 , H03H17/0202 , H04N19/122 , H04N19/186 , H04N19/635
摘要： Image processing apparatus is described for filtering a digital representation of a raster scanned image into a plurality of sub-bands in the two-dimensional spatial frequency domain, the resolution of the raster scanned image in a first direction (usually the horizontal direction) being greater than the resolution of the raster scanned image in a second direction (usually the vertical direction). The image processing apparatus has a decimation filter means comprising a number of multi-tap digital decimation filters for spatial filtering in the first and second directions. The mean of the filter lengths of the filters used for filtering in the first direction is greater than that of the filters used for filtering in the second direction. Complementary interpolation apparatus for reconstructing the image from the plurality of sub-bands is also described.
摘要翻译： 描述了图像处理装置，用于将光栅扫描图像的数字表示滤波成二维空间频域中的多个子带，光栅扫描图像在第一方向（通常为水平方向）上的分辨率更大 比在第二方向（通常是垂直方向）的光栅扫描图像的分辨率。 图像处理装置具有抽取滤波器装置，其包括多个用于在第一和第二方向上进行空间滤波的多抽头数字抽取滤波器。 用于在第一方向上过滤的滤波器的滤波器长度的平均值大于用于在第二方向上进行滤波的滤波器的滤波器长度的平均值。 还描述了用于从多个子带重建图像的互补插值装置。
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6.发明授权Apparatus and method for processing a digital video signal which prevents discontinuities and erosion of the picture area 失效用于处理数字视频信号的装置和方法，其防止图像区域的不连续性和侵蚀
公开(公告)号：US5386245A
公开(公告)日：1995-01-31
申请号：US934319
申请日：1992-08-25
CPC分类号： H04N5/142
摘要： In order to reduce the effects of discontinuities at the edge of a picture and reduce erosion of the usable picture area caused by a filtering or interpolation operation, the edges of the picture are extrapolated prior to such an operation. This may be achieved by a circuit which receives an input line of active pixel data; forms from the input line a delayed line of the active pixel data; produces at least one additional start pixel data derived from a pixel data at or adjacent the start of the input line; produces at least one additional end pixel data derived from a pixel data at or adjacent the end of the input line; and forms an output sequence of pixel data by selecting for the output sequence the additional start pixel data, then at least part of the delayed line, and then the additional end pixel data. This circuit therefore performs zero-order (repeat) extrapolation at the beginning and end of each line. Other circuits are also described for extrapolating lines at or adjacent the start and end of each frame, and for performing a first- or higher-order extrapolation.
摘要翻译： 为了减少图像边缘处的不连续性的影响，并减少由滤波或内插操作引起的可用图像区域的侵蚀，在这种操作之前，图像的边缘被外推。 这可以通过接收有源像素数据的输入线的电路来实现; 从输入线形成有源像素数据的延迟线; 产生至少一个额外的起始像素数据，该起始像素数据从输入线的起点处或其附近的像素数据导出; 产生从输入线的端部处或邻近输入线的像素数据导出的至少一个额外的终端像素数据; 并且通过为输出序列选择附加起始像素数据，然后选择延迟线的至少一部分，然后选择附加结束像素数据，形成像素数据的输出序列。 因此，该电路在每行的开始和结束处执行零次（重复）外推。 还描述了其他电路，用于在每个帧的开始和结束处或附近推断线，并且用于执行第一或更高阶外推。
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公开(公告)号：US5369447A
公开(公告)日：1994-11-29
申请号：US957094
申请日：1992-10-07
申请人： Jonathan M. Soloff
发明人： Jonathan M. Soloff
CPC分类号： H04N5/21
摘要： A video image filtering system is described which utilises multi-tap filters (70). In order to reduce the effects of edge distortion due to the finite size of the input image, extension data is added both the beginning and end of each raster line of data fed to the multi-tap filter (70). The function of the extension data is to pre-load the multi-tap filter (70). With a system constrained to operate at a constant sample rate, there is insufficient inter-raster line separation to accommodate the extension data needed for a long multi-tap filter (70). The system transforms the input video signal format (24) to a reformatted video signal format (28, 30) in which either the horizontal blanking or vertical blanking period has been maximised at the expense of the corresponding other blanking period. Having been reformatted, the raster lines are fed to a line store 60 from where sample values are read and output to the multi-tap filter 70 in the appropriate order to prefix or suffix the extension data to the original active video data.
摘要翻译： 描述了利用多抽头滤波器（70）的视频图像滤波系统。 为了减少由于输入图像的有限大小造成的边缘失真的影响，扩展数据将添加到多抽头滤波器（70）的每条光栅线数据的开始和结束。 扩展数据的功能是预加载多抽头滤波器（70）。 在系统受限于以恒定采样率运行的情况下，光栅间隔不足以适应长时间多抽头滤波器所需的扩展数据（70）。 该系统将输入视频信号格式（24）变换为重新格式化的视频信号格式（28,30），其中水平消隐或垂直消隐周期已经被最大化，以相应的其它消隐周期为代价。 重新格式化后，光栅线被馈送到行存储器60，从存储器采样值被读取并以适当的顺序输出到多抽头滤波器70，以将扩展数据前缀或后缀到原始有效视频数据。
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8.发明授权Digital filtering of blocks of data values with symmetric data extension at edges of the blocks 失效在块的边缘对数据扩展的数据值进行数字滤波
公开(公告)号：US5381354A
公开(公告)日：1995-01-10
申请号：US112971
申请日：1993-08-30
申请人： Jonathan M. Soloff
发明人： Jonathan M. Soloff
摘要： Digital filters are described for filtering blocks of data values. In order to reduce edge effects, symmetric data extension at the edges of the blocks is used. Multiplexers 34, 40, 46, 52 are used to pass data values between non-adjacent delay elements 36, 38, 42, 44, 48, 50 at leading and trailing edges of a data block to effect symmetric extension. The delay elements can be multisample delay elements and data being filtered can be multiplexed data.
摘要翻译： 描述数字滤波器用于过滤数据值块。 为了减少边缘效应，使用块边缘处的对称数据扩展。 多路复用器34,40,46,52用于在数据块的前沿和后沿的非相邻延迟元件36,38,42,44,48,50之间传递数据值，以实现对称扩展。 延迟元件可以是多采样延迟元件，并且被滤波的数据可以是复用数据。
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公开(公告)号：US5023718A
公开(公告)日：1991-06-11
申请号：US515643
申请日：1990-04-25
申请人： Jonathan M. Soloff
发明人： Jonathan M. Soloff
CPC分类号： G06T1/60 , G06F12/0207
摘要： Apparatus for storing a plurality of fields of digital video signal where each field consists of a plurality of n-bit words and n may vary downwards from a maximum value, comprises circuits for arranging the n-bit words of each incoming field in n bit-planes, each bit-plane containing a respective bit from each n-bit word, a video signal store comprising a plurality of memories each capable of storing the bits of a bit-plane, a common data bus for supplying the bit-planes to the memories, and circuits for controlling writing of the bit-planes in the memories such that a first field is written in a first n of the memories, the next field is written in a second n of the memories, and so on until all memories have been written in.
摘要翻译： 用于存储数字视频信号的多个场的装置，其中每个场由多个n比特字组成，n可以从最大值向下变化，包括用于将n个比特的每个入场的n比特字排列的电路， 平面，每个位平面包含来自每个n位字的相应位，视频信号存储器包括多个存储器，每个存储器能够存储位平面的位，用于将位平面提供给的公共数据总线 存储器和用于控制存储器中的位平面写入的电路，使得第一场被写入第一n个存储器中，下一个场被写入第二个存储器n，等等，直到所有的存储器都有 被写入
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