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公开(公告)号：DE3165660D1
公开(公告)日：1984-09-27
申请号：DE3165660
申请日：1981-05-26
Applicant: IBM
Abstract: A facsimile system is so controlled as to reduce four successively scanned source documents and print all four reduced copies on a single copy page. The system prints one of the source documents (44) in each quadrant of the copy document. The images are reduced in the horizontal dimension by discarding every other picture element in the scan image and in the vertical dimension by increasing the speed of the scanner (40) so that the size of the picture element in the vertical dimension is doubled. At the receiver, two scanned and reduced images will be printed on the left-hand half of the copy document (12). Subsequently, two additional scanned and reduced images are printed on the right-hand half of the copy document. When printing the right-hand half of the copy document, the printer is controlled to start printing at the horizontal mid-page of the copy document rather than the left-hand edge of the copy document.
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公开(公告)号：DE69423120D1
公开(公告)日：2000-04-06
申请号：DE69423120
申请日：1994-03-30
Applicant: IBM
Inventor： RACKLEY DARWIN PRESTON , WEST RODERICK MICHAEL PETERS
IPC: G09G5/02 , G06T1/00 , G06T1/20 , G06T5/00 , G09G5/04 , H04N1/64 , H04N9/64 , H04N9/67 , H04N1/46
Abstract: 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.
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公开(公告)号：DE3779554D1
公开(公告)日：1992-07-09
申请号：DE3779554
申请日：1987-09-08
Applicant: IBM
Abstract: An all points addressable raster scan graphics display system is operable in two modes. In the first mode, data is extracted from a refresh store, serialised, modified, and applied to a display device at a first frequency. In the second mode, data is extracted from the refresh store, serialised and partially modified at said first frequency, but it is then further modified and passed to the display device at an even sub harmonic, for example half, of the first frequency. The further modification includes concatenation of successive groups of display data bits. Accordingly, with the raster scan device operating at a constant scan velocity, the first mode provides a high picture element definition but relatively low colour definition display, and the second mode provides a display with an even submultiple, for example half, the picture element definition but considerably greater colour definition.
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公开(公告)号：AU600980B2
公开(公告)日：1990-08-30
申请号：AU7976387
申请日：1987-10-14
Applicant: IBM
Abstract: An all points addressable raster scan graphics display system is operable in two modes. In the first mode, data is extracted from a refresh store, serialised, modified, and applied to a display device at a first frequency. In the second mode, data is extracted from the refresh store, serialised and partially modified at said first frequency, but it is then further modified and passed to the display device at an even sub harmonic, for example half, of the first frequency. The further modification includes concatenation of successive groups of display data bits. Accordingly, with the raster scan device operating at a constant scan velocity, the first mode provides a high picture element definition but relatively low colour definition display, and the second mode provides a display with an even submultiple, for example half, the picture element definition but considerably greater colour definition.
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公开(公告)号：PH24302A
公开(公告)日：1990-05-29
申请号：PH35807
申请日：1987-09-11
Applicant: IBM
Abstract: An all points addressable raster scan graphics display system is operable in two modes. In the first mode, data is extracted from a refresh store, serialised, modified, and applied to a display device at a first frequency. In the second mode, data is extracted from the refresh store, serialised and partially modified at said first frequency, but it is then further modified and passed to the display device at an even sub harmonic, for example half, of the first frequency. The further modification includes concatenation of successive groups of display data bits. Accordingly, with the raster scan device operating at a constant scan velocity, the first mode provides a high picture element definition but relatively low colour definition display, and the second mode provides a display with an even submultiple, for example half, the picture element definition but considerably greater colour definition.
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Patent Agency Ranking
公开(公告)号：GB2196212A
公开(公告)日：1988-04-20
申请号：GB8720940
申请日：1987-09-05
Applicant: IBM
Abstract: An all points addressable raster scan graphics display system is operable in two modes. In the first mode, data is extracted from a refresh store (10, 11, 12, 13), serialised (21, 22, 23, 24), modified, and applied to a display device at a first frequency. In the second mode, data is extracted from the refresh store, serialised and partially modified at said first frequency, but it is then further modified and passed to the display device at an even sub harmonic, for example half, of the first frequency. The further modification includes concatenation of successive groups of display data bits. Accordingly, with the raster scan device operating at a constant scan velocity, the first mode provides a high picture element definition but relatively low colour definition display, and the second mode provides a display with an even submultiple, for example half, the picture element definition but considerably greater colour definition. In the first mode, groups of data bits are clocked through first (32) and second (33) and third (54) gates at the first frequency, and in the second mode the combined (35) output of the first and second gates (32 and 33) is, clocked through the third gate (54) at the even sub harmonic frequency.
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公开(公告)号：FR2605131A1
公开(公告)日：1988-04-15
申请号：FR8713336
申请日：1987-09-21
Applicant: IBM
Abstract: A frame scanning graphic display system in which all the points can be addressed according to two operating modes. In the first mode, data are extracted from a revision memory M0 to M3, serialised, modified and applied to a display device at a first frequency. In the second mode, the data are extracted from the revision memory, serialised and partially modified at the said first frequency and are then further modified and transferred to the display device at an even sub-harmonic, for example a half, of the first frequency. The additional modification comprises the chaining of successive groups of display data bits. Consequently, when the frame scanning device operates at a constant scanning speed, the first mode provides high definition for the image elements but a relatively low colour definition display and the second mode provides a display with an even sub-multiple, for example half, of the definition of the image elements but with a considerably higher colour definition.
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公开(公告)号：AU3180084A
公开(公告)日：1985-02-14
申请号：AU3180084
申请日：1984-08-10
Applicant: IBM
Inventor： KUMMER DAVID ALLEN , RACKLEY DARWIN PRESTON , SAENZ JESUS ANDRES
Abstract: @ 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：AT68621T
公开(公告)日：1991-11-15
申请号：AT85106931
申请日：1985-06-05
Applicant: IBM
Inventor： RACKLEY DARWIN PRESTON , SAENZ JESUS ANDRES , YOSIM PAUL STEWART
Abstract: A digital display system includes a monitor arranged to receive digital display data and synchronising signals to develop displays on a cathode ray tube. The monitor is switched between different line structure and/or colour definition modes in response to the polarity of one of the vertical or horizontal synchronising signals trains. A circuit receives this train to provide control signals to the horizontal time base and/or a colour signal code converter. The time base control signal, in accordance with its binary value, controls the frequency of the time base. The colour converter, in response to the control signals, either passes colour signals received in parallel over six input lines without change to the cathode ray tube drive circuits or converts colour signals on four of the input lines to output signals on the six lines to the drive circuits.
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公开(公告)号：AT57034T
公开(公告)日：1990-10-15
申请号：AT84107798
申请日：1984-07-05
Applicant: IBM
Inventor： KUMMER DAVID ALLEN , RACKLEY DARWIN PRESTON , SAENZ JESUS ANDRES
Abstract: @ 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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