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    Modulation method for communications and apparatus for making the same
    14.
    发明专利
    Modulation method for communications and apparatus for making the same 未知

    公开(公告)号：CZ9700999A3

    公开(公告)日：2002-07-17

    申请号：CZ99997

    申请日：1995-09-15

    Applicant: IBM

    Inventor： BALASUBRAMANIAN PERUVEMBA SWAM ,  LEE NATHAN JUNSUP ,  LEKUCH SCOTT DOUGLES

    IPC: H03M5/06 ,  H04L7/00 ,  H04L25/49

    Abstract: A modulation scheme and system, compatible with both the asynchronous IRDA mode and the synchronous mode of IR communication, involves Non-Return-to-Zero-Inverted (NRZI) and Flash pulse encoding in conjunction with zero-bit stuffing. A digital data stream has a zero-bit inserted therein, before NRZI format encoding, whenever five consecutive one's are detected in the stream to enable the controller to distinguish the data from flags, which are exempt from the zero-bit insertion, and to provide enough transitions in the data so that the demodulator's digital phase lock loop can stay locked independent of the data contents. A Flash pulse (of from +E,fra 3/16+EE to +E,fra 8/16+EE of bit cell width, depending on the data rate) is generated whenever a transition is detected in the NRZI formatted data. The result, in keeping with IRDA modulation, is that a Flash pulse is generated whenever a zero occurs in the data stream. On the demodulation side, whenever a Flash pulse is received, the level of the receive line is toggled resulting in an output in NRZI format. Using this modulation scheme with a serial controller which supports NRZI and bit-stuffing, a system may be constructed that uses the controller's phase lock loop to send and receive data synchronously.

    METHOD AND CIRCUIT ARRANGEMENT FOR CODING INFRARED SIGNALS
    15.
    发明专利
    METHOD AND CIRCUIT ARRANGEMENT FOR CODING INFRARED SIGNALS 未知

    公开(公告)号：HU76995A2

    公开(公告)日：1998-01-28

    申请号：HU9700409

    申请日：1995-09-15

    Applicant: IBM

    Inventor： BALASUBRAMANIAN PERUVEMBA SWAM ,  LEE NATHAN JUNSUP ,  LEKUCH SCOTT DOUGLAS

    IPC: H04L7/00 ,  H03M5/06 ,  H04L25/49

    Abstract: A modulation scheme and system, compatible with both the asynchronous IRDA mode and the synchronous mode of IR communication, involves Non-Return-to-Zero-Inverted (NRZI) and Flash pulse encoding in conjunction with zero-bit stuffing. A digital data stream has a zero-bit inserted therein, before NRZI format encoding, whenever five consecutive one's are detected in the stream to enable the controller to distinguish the data from flags, which are exempt from the zero-bit insertion, and to provide enough transitions in the data so that the demodulator's digital phase lock loop can stay locked independent of the data contents. A Flash pulse (of from +E,fra 3/16+EE to +E,fra 8/16+EE of bit cell width, depending on the data rate) is generated whenever a transition is detected in the NRZI formatted data. The result, in keeping with IRDA modulation, is that a Flash pulse is generated whenever a zero occurs in the data stream. On the demodulation side, whenever a Flash pulse is received, the level of the receive line is toggled resulting in an output in NRZI format. Using this modulation scheme with a serial controller which supports NRZI and bit-stuffing, a system may be constructed that uses the controller's phase lock loop to send and receive data synchronously.

    17.
    发明专利
    未知

    公开(公告)号：DE602004023616D1

    公开(公告)日：2009-11-26

    申请号：DE602004023616

    申请日：2004-05-13

    Applicant: IBM

    Inventor： BANTZ DAVID FREDRICK ,  GOPALAKRISHNAN PONANI S ,  GRUEN DANIEL M ,  HERGER LORRAINE M ,  LEE NATHAN JUNSUP ,  SHEA DENNIS GERARD ,  VIVEROS MARISA S

    IPC: H04L12/28 ,  H04L12/56

    Abstract: In a connection arrangement including two or more electronic devices, wherein information can be exchanged among the electronic devices through a plurality of communication links between the electronic devices, at least one of the electronic devices being configurable for communicating with a data source, a method for presenting a multi-channel message originating from the data source, the multi-channel message including a two or more components, includes the steps of allocating each of at least a portion of the components in the multi-channel message to at least one electronic device and, for each allocated component, determining possible communication paths between the data source and the at least one electronic device allocated to the corresponding component. The method further includes the steps of selecting, based at least in part on one or more selection criteria, at least one of the possible communication paths for the allocated components, each of the selected communication paths representing an optimal route between the data source and the at least one electronic device allocated to the corresponding component, and routing each of the allocated components in the multi-channel message according to the selected communication paths for presentation of the allocated components by the corresponding electronic device(s).

    18.
    发明专利
    未知

    公开(公告)号：DE602004010807T2

    公开(公告)日：2008-12-04

    申请号：DE602004010807

    申请日：2004-04-12

    Applicant: IBM

    Inventor： BANTZ DAVID ,  GOPALAKRISHNAN PONANI ,  GRUEN DANIEL M ,  HERGER LORRAINE M ,  LEE NATHAN JUNSUP ,  SHEA DENNIS ,  VIVEROS MARISA S

    IPC: H04L12/58 ,  H04L12/28 ,  H04L12/56

    Abstract: A virtual workspace is provided for a user with a number of electronic devices, in which information can be exchanged among the electronic devices through a number of connections between the electronic devices. The virtual workspace is provided by determining where services are located and the type of the services, determining one or more data formats associated with data accessible by one or more of the electronic devices. A portion of the data has a given one of one or more data formats. An electronic device is selected based at least in part on predetermined criteria and the given data format. A route through the connections to the selected electronic device is determined, where the route may comprise a given one or more of the connections. At least the portion of the data associated with the given data format is routed to the selected electronic device. The portion of the data is utilizable for presentation by the selected electronic device when received by the selected electronic device.

    19.
    发明专利
    未知

    公开(公告)号：DE69532846T2

    公开(公告)日：2005-05-19

    申请号：DE69532846

    申请日：1995-08-22

    Applicant: IBM

    Inventor： BALASUMBRAMANIAN PERUVEMBA SWA ,  LEE NATHAN JUNSUP ,  LEKUCH SCOTT DOUGLAS

    IPC: H04L27/10 ,  H03M5/12 ,  H04B10/10 ,  H04L7/00 ,  H04L25/49

    Abstract: Biphase or FM encoding is combined with Flash modulation in infrared (IR) communication. By shrinking the coded pulse width in the modulation process, power dissipation is effectively reduced to the point where FM encoding can be advantageously adapted to IR communication in a synchronous communication system. Noise filtering is also described.

    20.
    发明专利
    未知

    公开(公告)号：DE69532846D1

    公开(公告)日：2004-05-13

    申请号：DE69532846

    申请日：1995-08-22

    Applicant: IBM

    Inventor： BALASUMBRAMANIAN PERUVEMBA SWA ,  LEE NATHAN JUNSUP ,  LEKUCH SCOTT DOUGLAS

    IPC: H04L27/10 ,  H03M5/12 ,  H04B10/10 ,  H04L7/00 ,  H04L25/49

    Abstract: Biphase or FM encoding is combined with Flash modulation in infrared (IR) communication. By shrinking the coded pulse width in the modulation process, power dissipation is effectively reduced to the point where FM encoding can be advantageously adapted to IR communication in a synchronous communication system. Noise filtering is also described.

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