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公开(公告)号：EP0055374B1
公开(公告)日：1988-08-24
申请号：EP81109156.0
申请日：1981-10-29
发明人： Norgren, Kent Steven , Vogelsberg, Robert Eric , Bushaw, Kenneth Allen , Woodward, Milton Holloway , Rackley, Darwin Preston
CPC分类号： G06F13/18 , G06F12/0284 , G06F13/124
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公开(公告)号：EP0619675B1
公开(公告)日：2000-03-01
申请号：EP94302317.6
申请日：1994-03-30
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公开(公告)号：EP0619675A1
公开(公告)日：1994-10-12
申请号：EP94302317.6
申请日：1994-03-30
摘要： Encoded color image data, stored in a first format such as YUV or YIQ, is converted to RGB format for output to a color display screen 16. The conversion is carried out in real time synchronism with the generation of the display, in order to minimize buffer storage requirements for the RGB output data. RAM (random access memory) storage arrays 34 contain lookup tables for product functions defined in associated conversion equations. Each product function is a product of multiplication of a predetermined constant and data representing a U or V component of a source image pixel. Use of these tables effectively speeds up the conversion process, and has the added advantage of flexibility since the respective data is changeable to adjust to various image and display formats and conditions. In one embodiment, a RAM array used in the present format conversion process is also used (in a different display mode, with different stored data) as a conventional source of palette data.
摘要翻译： 以YUV或YIQ等第一格式存储的编码彩色图像数据被转换为RGB格式以输出到彩色显示屏16.转换与显示器的产生实时同步地进行，以便最小化 缓冲存储要求的RGB输出数据。 RAM（随机存取存储器）存储阵列34包含用于在相关联的转换方程中定义的乘积函数的查找表。 每个产品功能是预定常数的乘法和表示源图像像素的U或V分量的数据的乘积。 使用这些表有效地加快了转换过程，并且具有灵活性的附加优点，因为相应的数据可更改以适应各种图像和显示格式和条件。 在一个实施例中，当前格式转换处理中使用的RAM阵列也被用作常规的调色板数据源（在不同的显示模式中，具有不同的存储数据）。
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公开(公告)号：EP0264603B1
公开(公告)日：1992-06-03
申请号：EP87113100.9
申请日：1987-09-08
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公开(公告)号：EP0139093A3
公开(公告)日：1987-08-05
申请号：EP84107798
申请日：1984-07-05
IPC分类号： G09G01/16
CPC分类号： G09G5/40
摘要： @ A raster scan display system includes a plurality of storage maps (MAPO to MAP4). These maps are addressable in either of two modes. In the first mode each map contains bit mapped data and the maps are addressed together to provide colour signals from which colour video signals are derived. In the second mode, one map contains character representing data and a further map, character display dot patterns. In this mode the first map is addressed to provide partial addresses for the further map. These partial addresses are combined with row scan data signals to access the further map from which the character display dot data is used to generate the video signals.
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公开(公告)号：EP0139093A2
公开(公告)日：1985-05-02
申请号：EP84107798.5
申请日：1984-07-05
IPC分类号： G09G1/16
CPC分类号： G09G5/40
摘要： @ A raster scan display system includes a plurality of storage maps (MAPO to MAP4). These maps are addressable in either of two modes. In the first mode each map contains bit mapped data and the maps are addressed together to provide colour signals from which colour video signals are derived. In the second mode, one map contains character representing data and a further map, character display dot patterns. In this mode the first map is addressed to provide partial addresses for the further map. These partial addresses are combined with row scan data signals to access the further map from which the character display dot data is used to generate the video signals.
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公开(公告)号：EP0055374A3
公开(公告)日：1984-09-05
申请号：EP81109156
申请日：1981-10-29
发明人： Norgren, Kent Steven , Vogelsberg, Robert Eric , Bushaw, Kenneth Allen , Woodward, Milton Holloway , Rackley, Darwin Preston
CPC分类号： G06F13/18 , G06F12/0284 , G06F13/124
摘要： As an example of a peripheral processing complex coupled to a central processor, there is disclosed a document distribution terminal which can be required to process large volumes of data. To do this rapidly and efficiently, the terminal (10 to 16) is organized to process all of the data in specialized peripheral devices (12 to 15). The supervising central processing unit (20) controls the terminal but does not perform any data processing. The functions of entering data, scanning documents, encrypting data, compressing data, transceiving data, decompressing data, decrypting data and printing data are all performed in parallel by specialized devices working directly with a shared memory (16). A peripheral processing controller (10) initialized by the central processing unit controls time-shared access to the memory by the specialized devices, incorporates the memory address registers of the devices 12 to 15 and processes the modification of the contents thereof to attain parallel and sequential processing of the data in shared storage by the initialized devices in a mode selected by the central processing unit.
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9.发明公开Apparatus and method for compressing and expanding multibit digital pixel data 失效用于压缩和扩展多位数字像素数据的装置和方法
公开(公告)号：EP0445388A3
公开(公告)日：1992-08-05
申请号：EP90123518.4
申请日：1990-12-07
CPC分类号： H04N9/64 , G09G5/02 , H04N9/8042
摘要： Method and apparatus for converting multibit pixel data to a lesser number of bit pixel data and re-expanding the compressed data. Luminance data for each pixel is established as the 5 most significant bits of the original luminance signal. The chrominance information for groups of pixels is subsampled, and a common chrominance value assigned to each of the pixels in a group. The resulting compressed pixels may be 8 bits wide providing economical possibilities to store the 8 bit wide data. The data is expanded for display by adding lower order data bits to the compressed luminance signal data bits. A subsampled chrominance data signal is appended to the expanded luminance data for display.
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公开(公告)号：EP0170816B1
公开(公告)日：1991-10-16
申请号：EP85106931.0
申请日：1985-06-05
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