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    GRAPHICS PROCESSING SYSTEM
    11.
    发明专利
    GRAPHICS PROCESSING SYSTEM 未知

    公开(公告)号：GB2198019B

    公开(公告)日：1990-09-26

    申请号：GB8627552

    申请日：1986-11-18

    Applicant: IBM

    Inventor： EASTON COLIN JOHN ,  GAY ADRIAN CHARLES

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

    Abstract: A graphics processing system has means for generating a map (26) of an image in terms of the individual picture elements or pixels from data (20) defining the boundaries of component areas of the image. The generating means comprises a plurality of paired storage locations called a convex area table (32). Each pair of storage locations is associated with a line of individual picture elements on the image. Processing logic 22 computes display line and displacement values from the boundary information and stores each displacement area value in a free one of the pair of locations for the corresponding display line. The stored displacement values can then be used for generating the full pixel map of the image.

    Audio transmission over a computer network
    14.
    发明专利
    Audio transmission over a computer network 未知

    公开(公告)号：GB2283152A

    公开(公告)日：1995-04-26

    申请号：GB9321527

    申请日：1993-10-19

    Applicant: IBM

    Inventor： BARRACLOUGH KEITH ROBERT ,  GAY ADRIAN CHARLES

    IPC: G06F3/16 ,  H04L12/64 ,  H04M9/02 ,  H04L12/433

    Abstract: A computer workstation includes an audio adapter card for generating a sequence of digital audio data samples, aid accumulating them into audio data blocks. These are then transferred one at a time into a queue in the main memory of the computer workstation. A first program loop on the workstation receives an interrupt from the audio adapter card indicating the transfer of another audio data block, and maintains a record of the head of the queue. Another program loop requests access to the computer network, transmits messages from the workstation, and maintains a record of the tail of the queue. Each audio packet transmitted from the workstation incorporates essentially all the audio data currently enqueued.

    Communication terminal
    15.
    发明专利
    Communication terminal 未知

    公开(公告)号：GB2279204A

    公开(公告)日：1994-12-21

    申请号：GB9312481

    申请日：1993-06-17

    Applicant: IBM

    Inventor： BARRACLOUGH KEITH ROBERT ,  GAY ADRIAN CHARLES

    IPC: G06F13/00 ,  H04L12/18 ,  H04L12/64 ,  H04M3/56 ,  H04M11/06 ,  H04N7/15 ,  H04N7/52

    Abstract: The present invention relates a communication terminal for the synchronisation of audio and visual information within a communication system. Audio communication between the parties to a video conference is achieved by digitising the speech and transmitting the same over a packet based data network. Each party to the conference can draw the attention of the other party to an object on the screen using a pointer controlled by, say, a mouse or ball. The co-ordinates of each parties' pointer are incorporated, via a multiplexer, into the data packets containing the digitised speech and transmitted to the other party's terminal thereby ensuring the synchronisation the pointer information with the digitised speech.

    17.
    发明专利
    未知

    公开(公告)号：DE3784014T2

    公开(公告)日：1993-08-19

    申请号：DE3784014

    申请日：1987-09-18

    Applicant: IBM

    Inventor： EASTON COLIN JOHN ,  GAY ADRIAN CHARLES

    IPC: G06F3/153 ,  G06T11/00 ,  G06T11/20 ,  G09G5/393 ,  G09G1/16 ,  G06F15/62

    Abstract: A graphics processing system has means for generating a map (26) of an image in terms of the individual picture elements or pixels from data (20) defining the boundaries of component areas of the image. The generating means comprises a plurality of paired storage locations called a convex area table (32). Each pair of storage locations is associated with a line of individual picture elements on the image. Processing logic 22 computes display line and displacement values from the boundary information and stores each displacement area value in a free one of the pair of locations for the corresponding display line. The stored displacement values can then be used for generating the full pixel map of the image.

    18.
    发明专利
    未知

    公开(公告)号：DE68920144T2

    公开(公告)日：1995-06-29

    申请号：DE68920144

    申请日：1989-10-12

    Applicant: IBM

    Inventor： BUTLER NICHOLAS ,  GAY ADRIAN CHARLES

    IPC: G09G5/36 ,  G06T11/40 ,  G09G5/393 ,  G09G1/16

    Abstract: A computer graphics system is presented, having display logic (92) comprising a destination bit map (11) containing a plurality of image bits which map to a plurality of pixels for presenting an image, an auxiliary bit map (1) containing a plurality of area boundary bits representing pixels defining an area boundary line which encloses an area of the image, area filling logic (7) for operating upon those image bits enclosed by the area boundary line in order to fill the area with a particular pattern and colour, characterised in that the display logic further comprises area boundary drawing logic (5) having line segmentation means to resolve the specified boundary line into a plurality of intersecting two pixel line segments which can, from that time forward, be operated upon separately to define the area boundary bits in accordance with conventional area boundary drawing rules.

    Token ring network
    19.
    发明专利
    Token ring network 未知

    公开(公告)号：GB2278258A

    公开(公告)日：1994-11-23

    申请号：GB9310119

    申请日：1993-05-17

    Applicant: IBM

    Inventor： JONES ALAN ,  GAY ADRIAN CHARLES ,  BARRACLOUGH KEITH ROBERT ,  CRIPPS PETER

    IPC: G06F13/00 ,  H04L12/433 ,  H04L12/42

    Abstract: A token ring local area network includes workstations running both conventional data and multimedia applications. The latter, which generally require a minimum throughput in order to be viable, can be split into two further categories: those which cannot tolerate excessive latency (end to end delay), typically interactive applications such as voice communications, and those which are less sensitive to latency, typically playback operations. the network recognises three priority levels: (1) for latency-sensitive multimedia applications, (2) for latency-insensitive multimedia applications, and (3) conventional applications. All multimedia applications prior to commencement of any communications over the LAN must request an allocation of throughput from a LAN segment resource manager (LSRM), which will only be awarded if there is currently sufficient available throughput on the LAN to support the attended communication. Furthermore, first priority level applications are also given a maximum token holding time, thereby ensuring rapid circulation of the token, and controlling latency.

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