公开(公告)号：CA2068042A1

公开(公告)日：1993-01-23

申请号：CA2068042

申请日：1992-05-05

Applicant: IBM

Inventor： LUMELSKY LEON ,  CHOI SUNG M ,  PEEVERS ALAN W ,  PITTAS JOHN L

IPC: G09G5/06 ,  G06T3/00 ,  G06T11/20 ,  G09G5/14 ,  G09G5/36 ,  G09G5/395 ,  H04N5/265 ,  H04N5/272 ,  H04N5/445

Abstract: Method and apparatus for implementing a raster graphic display video data path that provides arbitrary mixing of a plurality of images. The video data path is highly parallelized, and employs parallel devices operating under the control of a set of look-up tables. The look-up tables are loadable from a controller, such as a host workstation. The raster graphic display video data path functions with unlimited screen resolutions, and also enables a variety of different pixel data formats from a potentially large number of different sources. Outputs from several image sources are mixed under the control of the host workstation, with a resultant pixel value being based on (a) a combined translucency coefficient (alpha) of the images, for each image source, and (b) a window identification number assigned by the host workstation. Pixel value conversion to a common predetermined format provides coherency between pixel values generated by a number of different image sources, such as HDTV and graphics servers. A separate frame buffer is allocated for each of the sources.

公开(公告)号：CA2068006A1

公开(公告)日：1993-01-23

申请号：CA2068006

申请日：1992-05-05

Applicant: IBM

Inventor： LUMELSKY LEON ,  CHENG LAWRENCE ,  CHOI SUNG M

IPC: G06F3/153 ,  G06F3/033 ,  G06F3/048 ,  G09G1/06 ,  G09G5/08 ,  H04N13/00 ,  G09G1/00

Abstract: YO9-91-091 A POINT ADDRESSABLE CURSOR FOR STEREO RASTER DISPLAY A stereoscopic cursor for high-resolution stereoscopic raster display is addressable to any arbitrary point on the display and simulates depth by alternately displaying left and right patterns that are offset from one another in a horizontal (x-axis) direction. Left and right views of the cursor are alternately displayed at the display frame rate, while a shutter mechanism presents the appropriate views to the viewer's eyes. To further enhance the perception of depth, monoscopic depth cues are provided by varying the cursor s color, size, transparency and/or pattern as the cursor moves in depth.

公开(公告)号：CA1297214C

公开(公告)日：1992-03-10

申请号：CA556027

申请日：1988-01-07

Applicant: IBM

Inventor： GUPTA SATISH ,  LUMELSKY LEON ,  MANSFIELD ROBERT L ,  ROMERO HECTOR G JR ,  SEGRE MARC ,  SPENCER ALEXANDER K ,  ST CLAIR JOE C ,  WAGONER JAMES D

IPC: G06F3/153 ,  G06T11/20 ,  G09G5/393 ,  G09G5/00

Abstract: As the speed and capacity of graphics workstations and personal computers including graphics adapters increases, the demand for high resolution intelligent display adapters also increases. Large graphic applications, formerly limited to large main frame computers with dedicated graphics display terminals may use this increased capability in the workstations to migrate applications to stand alone systems. The present invention relates to a graphics display adapter which can be used either in such a high capacity stand alone graphics workstation or in conjunction with a large main frame host computer. KI986-029

公开(公告)号：BR9102556A

公开(公告)日：1992-01-21

申请号：BR9102556

申请日：1991-06-19

Applicant: IBM

Inventor： LUMELSKY LEON

IPC: G06F3/153 ,  G09G5/00 ,  G09G5/36 ,  G09G5/39 ,  G09G5/391 ,  G09G5/393 ,  G09G5/395 ,  G09G5/397 ,  G09G5/399 ,  H04N5/262 ,  H04N5/44 ,  G06F15/62 ,  H04N7/01

Abstract: Image conversion method and apparatus that provides for (a) storing in a first memory a first image field; (b) storing in a second memory a second image field; (c) reading the first and the second memories; (d) simultaneously displaying on a display screen the first and the second image fields as a single image frame; and (e) while performing the step of reading the method includes a step of storing in a third memory a third image field. The first, second and third memories are provided as a frame buffer having a 3x3 memory block organization. For image fields numbered 1, 2, 3, 4, 5...n.. the system of the invention reads the image fields two at a time in accordance with a predetermined sequence given by: 1 and 2, 2 and 3, 3 and 4, 4 and 5, ... (n - 1) and n, n and (n + 1). A high resolution frame length is selected to be longer than or shorter than a television field period. The phase difference between the two is measured and circuitry alters the predetermined read-out sequence to ensure that a field memory to be read will not also be required for simultaneously storing a next television field.