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    • 93. 发明授权
    • Image coding method and system for providing reduced bit rate arithmetic
codes
    • 用于提供降低的比特率算术代码的图像编码方法和系统
    • US5867600A
    • 1999-02-02
    • US748490
    • 1996-11-08
    • Takahiro Hongu
    • Takahiro Hongu
    • H04N1/40G06T9/00H03M7/40H04N1/41H04N1/413H04N1/417G06K9/36
    • G06T9/004H04N1/417
    • A bi-level image coder for providing reduced bit rate arithmetic codes is disclosed, wherein each page of image to be coded is divided into a plurality of areas such as line groups, or blocks, and an arithmetic coder codes each of input pixels (the pixel S.sub.i) by using a predicted value of MPS (most probable symbol) and a predicted probability of LPS (least probable symbol) occurrence which are generated with a template and a LPS predicted probability table. The pixel attribute of the pixel S.sub.i is determined to one of a character image attribute, a dither/dot image attribute and a halftoned image attribute based on statistical properties of the area of the pixel S.sub.i. One of predetermined LPS predicted probability tables and one of predetermined templates are selected for each of the areas in operation. The coder may be so arranged as to following the JBIG standard. In one embodiment, a specific pixel of the template used for context data generation is moved to a position highly correlated with the pixel to be coded.
    • 公开了一种用于提供降低的比特率算术代码的双级图像编码器,其中要编码的图像的每一页被划分成多个区域,例如线组或块,并且算术编码器对输入像素(的 像素Si)通过使用由模板和LPS预测概率表生成的MPS(最可能符号)的预测值和LPS(最不可能符号)出现的预测概率。 基于像素Si的区域的统计特性,将像素Si的像素属性确定为字符图像属性,抖动/点图像属性和半色调图像属性中的一个。 为操作中的每个区域选择预定的LPS预测概率表之一和预定模板之一。 编码器可以被布置为遵循JBIG标准。 在一个实施例中,用于上下文数据生成的模板的特定像素被移动到与要编码的像素高度相关的位置。
    • 96. 发明授权
    • Apparatus and method of analyzing internet activity
    • 分析互联网活动的设备和方法
    • US5787253A
    • 1998-07-28
    • US654347
    • 1996-05-28
    • Timothy David McCreeryMahboud Zabetian
    • Timothy David McCreeryMahboud Zabetian
    • H04L12/26H04L29/06H04N1/413
    • H04L29/06H04L43/0882H04L43/18H04L69/161H04L43/045H04L69/16
    • An internet activity analyzer includes a network interface controller, a packet capturing module, a packet analysis module, and a data management module. The network interface controller is connected to a transmission medium for a network segment and is arranged to receive the stream of data packets passing along the medium. The packet stream is filtered to remove undesired packet data and is stored in a raw packet data buffer. The packet data is decoded at the internet protocol layer to provide information such as timing and sequencing data regarding the exchange of packets between nodes and the packet data for exchanges between multiple nodes may be recompiled into concatenated raw transaction data which may be coherently stored in a raw transaction data buffer. An application level protocol translator translates the raw transaction data and stores the data in a translated transaction data buffer. The translated data provides high level information regarding the transactions between nodes which is used to monitor or compile statistics regarding network or internetwork activity. The data management module communicates with the packet capturing module and the packet analyzer and, particularly, the data in the raw packet, decoded packet, raw transaction, and translated transaction data buffers to provide real time and stored analytical information concerning internet activity.
    • 互联网活动分析器包括网络接口控制器,分组捕获模块,分组分析模块和数据管理模块。 网络接口控制器连接到用于网段的传输介质,并且被布置为接收沿着介质通过的数据分组流。 对分组流进行过滤以去除不期望的分组数据,并存储在原始分组数据缓冲器中。 分组数据在互联网协议层被解码以提供关于节点之间的分组交换的定时和排序数据的信息,并且用于多个节点之间的交换的分组数据可以被重新编译为连续的原始交易数据,其可以被相干地存储在 原始事务数据缓冲区。 应用级协议翻译器翻译原始事务数据并将数据存储在翻译的事务数据缓冲区中。 翻译的数据提供了关于用于监视或编译关于网络或互联网活动的统计的节点之间的事务的高级信息。 数据管理模块与分组捕获模块和分组分析器进行通信,特别是原始分组,解码分组,原始事务和翻译的事务数据缓冲器中的数据,以提供关于互联网活动的实时和存储的分析信息。
    • 98. 发明授权
    • Software-based encoder for a software-implemented end-to-end scalable
video delivery system
    • 用于软件实现的端到端可扩展视频传输系统的基于软件的编码器
    • US5768535A
    • 1998-06-16
    • US835855
    • 1997-04-08
    • Navin ChaddhaJ. Duane NorthcuttGerard A. WallJames G. Hanko
    • Navin ChaddhaJ. Duane NorthcuttGerard A. WallJames G. Hanko
    • G06F13/00G06T9/00H04N5/93H04N7/173H04N7/24H04N7/26H04N7/28H04N21/2343H04N21/24H04N21/258H04N21/2662H04N21/4402H04N21/462H04N21/63H04N21/6405H04N21/647H04N1/413
    • H04N21/2662H04N19/156H04N19/186H04N19/63H04N19/94H04N21/234327H04N21/2402H04N21/25808H04N21/440227H04N21/4621H04N21/631H04N21/6405H04N21/64792H04N7/17336H04N7/24H04N19/39
    • A software-based encoder is provided for an end-to-end scalable video delivery system that operates over heterogeneous networks. The encoder utilizes a scalable video compression algorithm based on a Laplacian pyramid decomposition to generate an embedded information stream. The decoder decimates a highest resolution original image, e.g., 640.times.480 pixels, to produce an intermediate 320.times.240 pixel image that is decimated to produce an intermediate 160.times.120 pixel image that is compressed to form an encodable base layer 160.times.120 pixel image. This base layer image is decompressed to form an image that is up-sampled by interpolation to produce an up-sampled 320.times.240 pixel image. This up-sampled image is subtracted from the intermediate 320.times.240 pixel image to form an error image that is compressed and encoded as a first enhancement 640.times.480 pixel layer. The decompressed base layer image is also up-sampled at step to produce an up-sampled 640.times.480 pixel image that is subtracted from the original 640.times.480 pixel image 200 to yield an error image that is compressed to yield a second enhancement 320.times.240 pixel layer. Collectively, the base and enhancement layers comprise the transmitted embedded bit stream. At the receiving end, the decoder extracts from the embedded stream different streams at different spatial and temporal resolutions. Because decoding requires only additions and look-ups from a small stored table, decoding occurs in real-time.
    • 提供了一种基于软件的编码器,用于在异构网络上运行的端到端可伸缩视频传送系统。 编码器利用基于拉普拉斯金字塔分解的可扩展视频压缩算法来生成嵌入信息流。 解码器对最高分辨率的原始图像(例如,640×480像素)进行抽取,以产生被抽取的中间的320×240像素图像,以产生被压缩形成可编码的基本层160×120像素图像的中间160×120像素图像。 该基层图像被解压缩以形成通过内插进行上采样以产生上采样的320×240像素图像的图像。 从中间320×240像素图像中减去该上采样图像,以形成被压缩并编码为第一增强640×480像素层的误差图像。 解压缩的基层图像也被逐步上采样,以产生从原始640×480像素图像200中减去的上采样的640×480像素图像,以产生被压缩以产生第二增强320×240像素层的误差图像。 总的来说,基础层和增强层包括传输的嵌入位流。 在接收端,解码器以不同的空间和时间分辨率从嵌入的流中提取不同的流。 因为解码只需要从小的存储表中增加和查找,所以解码发生在实时中。
    • 99. 发明授权
    • Data processor for image data using orthogonal transformation
    • 数据处理器,用于使用正交变换的图像数据
    • US5517327A
    • 1996-05-14
    • US267711
    • 1994-06-28
    • Munehiro NakataniHiroyuki SuzukiKazuomi Sakatani
    • Munehiro NakataniHiroyuki SuzukiKazuomi Sakatani
    • G06T9/00H04N1/40H04N1/41H04N1/413H04N7/26H04N7/30
    • H04N1/41H04N1/40062H04N1/413H04N19/126H04N19/14H04N19/17H04N19/176H04N19/42H04N19/48H04N19/60H04N19/124H04N19/132H04N19/146H04N19/149H04N19/15H04N19/30
    • In a data processor, image data of a pixel matrix is subjected to orthogonal transformation to coefficient data, the coefficient data is quantized with a first quantization table for character image and a second quantization table for half-tone image, and the image data is discriminated to be character image data or half-tone image data according to the quantization data. The selected data is then coded. In another processor, image data are divided into first and second processing blocks of m*m and M*M pixel matrices wherein M>m and the second processing block includes one of first processing blocks and adjacent pixels. Image data in a first and second processing block are subjected to orthogonal transformation to coefficient data. It is discriminated according to the coefficient data of the second processing block if the image is a character, dot, or half-tone image to select an appropriate quantization table, and image data of the first block is quantized according to the selected table and the quantized data are coded. In a further processor, two discrimination windows are provided, the first having coefficient data around the DC component and the second having the other data. Orthogonal transform coefficients of image data in a processing block are calculated, and maximum of absolute values in the windows are obtained. An image is discriminated to be a dot image if the maximum of the first window is larger than the second and larger than a threshold value.
    • 在数据处理器中,将像素矩阵的图像数据进行到系数数据的正交变换,用用于字符图像的第一量化表和半色调图像的第二量化表量化系数数据,并且识别图像数据 根据量化数据作为字符图像数据或半色调图像数据。 然后对所选择的数据进行编码。 在另一个处理器中,图像数据被划分成m * m和M * M个像素矩阵的第一和第二处理块,其中M> m,第二处理块包括第一处理块和相邻像素之一。 对第一和​​第二处理块中的图像数据进行正交变换到系数数据。 如果图像是用于选择适当的量化表的字符,点或半色调图像,则根据第二处理块的系数数据进行区分,并且根据所选择的表格对第一块的图像数据进行量化, 量化数据被编码。 在另一个处理器中,提供两个识别窗口,第一个具有围绕DC分量的系数数据,而第二个具有其他数据。 计算处理块中的图像数据的正交变换系数,并获得窗口中绝对值的最大值。 如果第一窗口的最大值大于第二窗口并且大于阈值,则将图像区分为点图像。
    • 100. 发明授权
    • Method and apparatus for processing data for a visual-output device with
reduced buffer memory requirements
    • 用于处理具有减少的缓冲存储器要求的视觉输出设备的数据的方法和装置
    • US5506944A
    • 1996-04-09
    • US486133
    • 1995-06-06
    • Ronald S. Gentile
    • Ronald S. Gentile
    • H04N1/411G06K15/00G06T9/00G06T11/60H03M7/30H04N1/41H04N1/413
    • H04N1/41G06K15/00G06K15/181G06K15/1851G06K15/1865G06T11/60G06T9/005G06T9/007H03M7/30G06K2215/0065G06K2215/0071
    • A two-dimensional page representation to be printed has a combination of text, graphic and image representation types. A data memory stores data representative of the page representation. A program memory stores program instructions including a plurality of different algorithms for compressing data associated with corresponding different representation types and their combinations. A processor is coupled to the data and programs memories for (a) identifying separate data for each of a plurality of regions containing collectively the page representation, with the data for each region corresponding to the portion of the page representation contained in that region; (b) determining the types of representations and boundaries of each type of representation and the combinations of types contained in each region; (c) rasterizing and compressing the data associated with the determined types of representations for each region with algorithms based on selected compression factors; (d) storing sequentially the compressed data for each region; and (e) when needed for printing, sequentially for each region, reading the corresponding stored data, decompressing the read data, and transmitting the decompressed data to the print device for printing.
    • 要打印的二维页面表示具有文本,图形和图像表示类型的组合。 数据存储器存储表示页表示的数据。 程序存储器存储包括用于压缩与相应的不同表示类型及其组合相关联的数据的多种不同算法的程序指令。 处理器耦合到数据和程序存储器,用于(a)为包含该页面表示的集合的多个区域中的每一个标识单独的数据,每个区域的数据对应于包含在该区域中的页面表示的部分; (b)确定每种类型的表示形式的表示形式和边界的类型以及每个区域中包含的类型的组合; (c)使用基于所选择的压缩因子的算法对每个区域的确定的表示类型相关联的数据进行光栅化和压缩; (d)顺序地存储每个区域的压缩数据; 和(e)当需要打印时,顺序地为每个区域读取对应的存储数据,解压缩读取的数据,并将解压缩数据发送到打印设备进行打印。