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Patent Agency Ranking
公开(公告)号：DE3686505T2
公开(公告)日：1993-04-08
申请号：DE3686505
申请日：1986-03-19
Applicant: IBM
Inventor： KUNZINGER CHARLES ANTHONY
Abstract: NTSC composite color video signals captured in a freeze-frame videoconferencing system can be decomposed into luminance and chrominance components using simple digital addition and subtraction. The necessary apparatus includes a conventional color camera, an analog-to-digital converter, and a superframe buffer, organized into four field buffers. The analog signal is sampled at phase angles which are displaced at 135 degree increments. The preferred phase angles are 0, 135, 270, 45, 180, 315, 90 and 225 degrees relative to the phase of the color burst for the current scan line. Due to the reversal of the color burst phase on a frame-to-frame basis, a luminance or Y value can be obtained for each pel by adding the digital values stored in corresponding pel positions in corresponding fields (odd or even) in two successive frames of the same image. A chrominance or C value can be obtained by subtracting the same two values. The I and Q components of chrominance can be obtained directly as a result of the subtraction process at certain of the angles or indirectly through calculation at other of the angles.
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公开(公告)号：DE3373603D1
公开(公告)日：1987-10-15
申请号：DE3373603
申请日：1983-06-01
Applicant: IBM
Inventor： KUNZINGER CHARLES ANTHONY
Abstract: Distributed transmission control for a TDMA system including one or more user networks. A time synchronized burst modem, one at each station in a system, transfers TDMA frame timing signals to an interconnected data processing machine. The interconnected data processing machine is then capable of synchronizing information transfer to the time synchronized burst modem in accordance with the received TDMA frame timing signals. Accordingly, each network has available to it, at each data processing machine in the network, TDMA frame timing signals. Accordingly, optimizing information transfer can be effected on a network-by-network basis, wholly independent of overall system TDMA information transfer optimization.
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公开(公告)号：DE2424808A1
公开(公告)日：1975-01-23
申请号：DE2424808
申请日：1974-05-22
Applicant: IBM
Abstract: A two-phase superconductive shift register using Josephson tunnelling devices is provided wherein a plurality of shift register stages each includes a first and second branch in parallel to which a DC current is supplied. A Josephson tunnelling device is located in each branch which operates in its no voltage state when the DC current is applied thereto. A first and second input means is provided for switching one of the Josephson tunnelling devices in accordance with an input to cause the input current to flow through the other branch. A first and second coupling means are located between the stages of the shift register, the first coupling means coupling the first branch circuits of successive stages and the second coupling means coupling second branch circuits of successive stages. The coupling means are energized in response to phase time pulses and current flow in the preceding stage causing the Josephson device in the next stage to switch to its finite voltage stage thereby causing the current to flow in the opposite branch in the next stage.
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公开(公告)号：DE3686505D1
公开(公告)日：1992-10-01
申请号：DE3686505
申请日：1986-03-19
Applicant: IBM
Inventor： KUNZINGER CHARLES ANTHONY
Abstract: NTSC composite color video signals captured in a freeze-frame videoconferencing system can be decomposed into luminance and chrominance components using simple digital addition and subtraction. The necessary apparatus includes a conventional color camera, an analog-to-digital converter, and a superframe buffer, organized into four field buffers. The analog signal is sampled at phase angles which are displaced at 135 degree increments. The preferred phase angles are 0, 135, 270, 45, 180, 315, 90 and 225 degrees relative to the phase of the color burst for the current scan line. Due to the reversal of the color burst phase on a frame-to-frame basis, a luminance or Y value can be obtained for each pel by adding the digital values stored in corresponding pel positions in corresponding fields (odd or even) in two successive frames of the same image. A chrominance or C value can be obtained by subtracting the same two values. The I and Q components of chrominance can be obtained directly as a result of the subtraction process at certain of the angles or indirectly through calculation at other of the angles.
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公开(公告)号：DE2422549A1
公开(公告)日：1975-01-23
申请号：DE2422549
申请日：1974-05-09
Applicant: IBM
IPC: H03K19/195 , H03K19/02
Abstract: A logical OR circuit using Josephson tunnelling devices is provided having a first, second and third gate. Each of the gates includes a first and second branch circuit in parallel. A first Josephson tunnelling device is located in the first branch circuit and a second Josephson tunnelling device is located in the second branch of each of said first, second and third gates. A DC current is applied to each of the first, second and third gates. A control means provides the logic inputs to each of the first and second Josephson devices in each of said gates to cause the selected devices to switch to their finite voltage state causing the input current to flow in the other one of the first and second branch circuits. First sensing means connected in series are located between the first branches of the first, second and third gates which response to the current flow in one or both of the first branches of the first and second gates to provide a sensing current pulse to the control means for the Josephson tunnelling junction in the second branch of the third gate switching it into its finite voltage state thereby causing the current to flow through the opposite branch in the third gate representing current flow in one or more of the first branches of the first and second gates representing an OR function. Second sensing means connected in parallel are located between the second branches of the first, second and third gates which respond to the current flow in the second branch of both the first and second gates to provide an input to the control means for the first Josephson device of the third gate causing it to switch to its finite voltage stage thereby causing the input current to the third gate to flow through the opposite branch thereof.
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