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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：US5231487A
公开(公告)日：1993-07-27
申请号：US810335
申请日：1991-12-19
CPC分类号： G11B20/10 , G11B20/00007 , G11B20/1833 , H04N19/124 , H04N19/186 , H04N19/1883 , H04N19/50 , H04N19/61 , H04N19/63 , H04N19/102 , H04N19/13 , H04N19/65 , H04N19/89
摘要： Apparatus for storing a video signal includes a signal compression arrangement constituted by a spatial two-dimensional sub-band filtering arrangement that filters a digital video signal to form data sets constituting respective sub-bands of the two-dimensional spatial frequency domain, a quantizer that quantizes the data sets in accordance with respective values which are such that the amount of quantization of one of the data sets constituting a sub-band to which dc luminance information of the signal is at least predominantly confined is less than the average of the amounts of quantization of the remaining data sets, and an entropy encoder that selectively encodes at least some of the quantized data sets so that the quantized data sets, as selectively entropy encoded, form a compressed video signal. The signal compression arrangement is followed by a storage arrangement for storing the compressed video signal.
摘要翻译： 用于存储视频信号的装置包括由空间二维子带滤波装置构成的信号压缩装置，其对数字视频信号进行滤波以形成构成二维空间频域的各个子带的数据集;量化器， 根据相应的值量化数据集，这些值使得构成信号的直流亮度信息至少主要被限制的子带的数据组之一的量化量小于该信号的直流亮度信息至少主要被限制的子带的量化的量 剩余数据集的量化，以及选择性地编码至少一些量化数据集的熵编码器，使得作为选择性熵编码的量化数据集形成压缩视频信号。 信号压缩布置之后是用于存储压缩视频信号的存储装置。
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公开(公告)号：US5214502A
公开(公告)日：1993-05-25
申请号：US810337
申请日：1991-12-19
CPC分类号： H04N11/042 , H04N19/126 , H04N19/186 , H04N19/63 , H04N19/10 , H04N19/102
摘要： To enable a digital composite color video signal (NTSC or PAL) to be compressed directly, that is without dividing it into its components and compressing the components separately, the digital composite color video signal is decorrelated, for example by spatial sub-band filtering, to form data sets, for example sub-bands, representing dc luminance information, ac luminance information and dc chrominance information. The data sets are then quantized in accordance with respective quantization values from a quantization matrix, those quantization values being such that the amount of quantization of each of some of the data sets to which the dc luminance information and the dc chrominance information is at least predominantly confined is less than the average of the amounts of quantization of the remaining data sets. At least some of the quantized data sets are then entropy encoded.
摘要翻译： 为了使数字复合彩色视频信号（NTSC或PAL）能够被直接压缩，即不将其划分成其组件并分别压缩组件，数字复合彩色视频信号例如通过空间子带滤波去相关， 以形成表示直流亮度信息，交流亮度信息和直流色度信息的数据组，例如子带。 然后根据来自量化矩阵的相应量化值量化数据组，这些量化值使得直流亮度信息和直流色度信息至少主要地对数据集中的每一个的量化量 限制小于剩余数据集的量化量的平均值。 至少一些量化数据集然后被熵编码。
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公开(公告)号：US5223926A
公开(公告)日：1993-06-29
申请号：US810336
申请日：1991-12-19
IPC分类号： H03M7/30 , G06T9/00 , G11B20/00 , G11B20/10 , H04N1/41 , H04N7/26 , H04N7/30 , H04N7/32 , H04N11/04
CPC分类号： G11B20/00007 , G11B20/10 , H04N19/124 , H04N19/129 , H04N19/186 , H04N19/1883 , H04N19/50 , H04N19/61 , H04N19/63 , H04N19/13 , H04N19/91
摘要： A digital video signal is compressed by spatial sub-band filtering to form data sets constituting respective sub-bands of the two-dimensional spatial frequency domain. The data sets for a field or frame are stored. A first sequencer controls writing, in accordance with a desired sequence, of the stored data to a quantizer in which they are quantized in accordance with respective values, those values being such that the amount of quantization of at least a data set constituting a sub-band to which dc luminance information of the signal is at least predominantly confined is less than the average of the amounts of quantization of the remaining data sets. The quantized data sets are then encoded in an entropy encoder which has a first coding portion for coding quantized data representative of dc luminance information and a second coding portion for coding quantized data representative of ac luminance information. A second sequencer, which may be the same sequencer as the first sequencer, controls operation of the quantizer so that each datum (sample) written thereto is appropriately quantized, and controls operation of the entropy encoder so that each quantized sample is directed to the appropriate one of the first and second coding portions.
摘要翻译： 通过空间子带滤波对数字视频信号进行压缩，形成构成二维空间频域的各子带的数据组。 存储字段或帧的数据集。 第一定序器根据期望的顺序控制将存储的数据写入量化器中，根据各个值对其进行量化，这些值使得至少构成子数据的数据集的量化量， 至少主要限制信号的直流亮度信息的频带小于剩余数据集的量化量的平均值。 量化数据组然后被编码在熵编码器中，该熵编码器具有用于对表示直流亮度信息的量化数据进行编码的第一编码部分和用于编码代表交流亮度信息的量化数据的第二编码部分。 可以与第一定序器相同的定序器的第二定序器控制量化器的操作，使得对其写入的每个数据（样本）被适当地量化，并且控制熵编码器的操作，使得每个量化样本被引导到适当的 第一和第二编码部分之一。
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公开(公告)号：US5613091A
公开(公告)日：1997-03-18
申请号：US141609
申请日：1993-10-27
CPC分类号： H04N19/00 , H04N19/129 , H04N19/15 , H04N19/186 , H04N19/63 , H04N19/70 , H04N19/98
摘要： A signal processing system includes a compression encoder 16 for compressing an input block of data samples including a plurality of sub-blocks, each sub-block including an array of data samples, into a block of compressed data. A sequencer 14' accesses the data samples of the input block to be passed to the compression encoder 16 with the sub-blocks being accessed in a predetermined first order and the data samples within each sub-block being accessed in a predetermined pseudo-random order such that successively accessed locations in the array of samples for a sub-block are scattered throughout that sub-block. The pseudo random accessing sequence enables occupancy of a buffer 73 for the compressed data block to be linearised. The sequencer can include a counter 62, the output of which addresses a look-up table 65 for generating the pseudo-random sequence in a repeatable manner.
摘要翻译： 信号处理系统包括压缩编码器16，用于将包括多个子块的数据样本的输入块压缩到包含数据样本阵列的每个子块中，以压缩数据块。 定序器14'以预定的第一顺序访问要传送到压缩编码器16的输入块的数据样本，并以预定的伪随机顺序访问每个子块内的数据采样 使得用于子块的样本阵列中的连续访问的位置分散在该子块中。 伪随机访问序列使压缩数据块的缓冲器73的占用被线性化。 定序器可以包括计数器62，其输出端寻址用于以可重复的方式生成伪随机序列的查找表65。
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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：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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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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公开(公告)号：US5392071A
公开(公告)日：1995-02-21
申请号：US31902
申请日：1993-03-16
IPC分类号： H04N5/14 , G06T9/00 , H04N5/262 , H04N5/272 , H04N5/46 , H04N5/84 , H04N5/926 , H04N5/937 , H04N7/12 , H04N7/26 , H04N11/20 , H04N11/04
CPC分类号： H04N7/12 , H04N19/63 , H04N5/262 , H04N5/272 , H04N5/926 , H04N5/937 , H04N19/30 , H04N5/843
摘要： Image processing apparatus is described in which a source stream of data captured by a particular source is passed through a data splitter where it is split using one splitting technique into a plurality of split streams of data. These split streams of data each contain only part of the information within the source stream of data. The split streams of data are separately manipulated by a post production unit prior to being passed through a data combiner where they are recombined to form an output stream of data. The source stream of data and the output stream of data are of a higher resolution than the individual split streams of data. The post production unit includes at least one reformatter for reformatting the data stream to use a different splitting technique matched to the manipulation being performed in the post production unit.
摘要翻译： 描述了图像处理装置，其中由特定源捕获的源数据流通过数据分离器，其中使用一个分割技术将数据分离器分割成多个分离的数据流。 这些分离的数据流每个只包含源数据源中的部分信息。 分割的数据流在被传送通过数据组合器之前被后期制作单元分开操作，在这些数据组合器中它们被重新组合以形成输出的数据流。 数据的源流和数据的输出流具有比单独的分离数据流更高的分辨率。 后期制作单元包括至少一个重新格式化的重新格式化数据流以使用与在后期制作单元中执行的操作相匹配的不同的分割技术。
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10.发明授权Data formatter for formatting variable length data words into fixed length data words 失效用于将可变长度数据字格式化为固定长度数据字的数据格式器
公开(公告)号：US5471594A
公开(公告)日：1995-11-28
申请号：US248637
申请日：1994-05-23
申请人： Jonathan J. Stone
发明人： Jonathan J. Stone
摘要： A two stage data formatter is described for converting variable bit length code words into fixed bit length code words. The second formatting stage 12 splits the words into complete fixed length code words and returns any remainder bits to the first formatting stage 10. The first formatting stage 10 preprocesses the following data words by concatenating any remainder bits with the following variable bit length code word and updating its corresponding bit length code word. These preprocessed data words are then passed to the second formatting stage 12.
摘要翻译： 描述了用于将可变位长代码字转换成固定位长度代码字的两级数据格式器。 第二格式化阶段12将单词分解为完整的固定长度码字，并将任何余数位返回到第一格式化阶段10.第一格式化阶段10通过将任何剩余位与下列可变位长代码字连接来预处理以下数据字;以及 更新其相应的位长度代码字。 然后将这些预处理的数据字传递到第二格式化阶段12。
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