公开(公告)号：US4491953A

公开(公告)日：1985-01-01

申请号：US416380

申请日：1982-09-09

Applicant: Jules A. Bellisio ,  Arthur B. Larsen

Inventor： Jules A. Bellisio ,  Arthur B. Larsen

IPC: H03M7/30 ,  G06T9/00 ,  H04B14/04 ,  H04B14/06 ,  H04N7/26 ,  H04N11/04 ,  H03K13/22

CPC classification number: H04N11/046 ,  H04B14/046 ,  H04N19/90

Abstract: A dual mode encoding/decoding technique for use in digital systems wherein transmitted digital words are limited, on average, to an alotted number of bits. The transmitted digital words are coded into first and second modes. The first coding mode utilizes predictive differential coding to provide a precision which can be greater than that obtainable by coding information solely with the allotted number of bits, while the second mode assures at least a minimum precision for the allotted number of bits. The first coding mode is transmitted as long as a preselected precision is provided. If not, the second coding mode is transmitted. In the disclosed embodiment, the dual mode encoding/decoding technique is applied to the transmission of color video signals.

Abstract translation: 一种用于数字系统的双模式编码/解码技术，其中传输的数字字被平均地限制为多个位数。 发送的数字字被编码为第一和第二模式。 第一编码模式利用预测差分编码提供的精度可以大于仅通过分配的比特数编码信息可获得的精度，而第二模式确保所分配的比特数的至少最小精度。 只要提供预选精度，就传送第一编码模式。 如果不是，则发送第二编码模式。 在所公开的实施例中，双模式编码/解码技术被应用于彩色视频信号的传输。

公开(公告)号：US4236245A

公开(公告)日：1980-11-25

申请号：US30811

申请日：1979-04-17

Applicant: Stanley L. Freeny ,  Arthur B. Larsen ,  Thomas J. Pedersen

Inventor： Stanley L. Freeny ,  Arthur B. Larsen ,  Thomas J. Pedersen

IPC: H04J3/24 ,  H04L12/43 ,  H04J6/02

CPC classification number: H04L12/43 ,  H04J3/245

Abstract: Communication between a plurality of data terminals (101(1) to 101(b)) serially interconnected with a main terminal (102) is provided by data frames or packets having a data portion for accommodating a burst of data preceeded by a header portion for accommodating address data followed by an empty/full "flag" bit indicating whether the addressee station has withdrawn the data burst. If a terminal has a data burst to send, it locates an empty packet, inserts the addressee designation in the packet subsequent to any prior address that the packet might contain, interposes delay in the passage therethrough of the packet so that the duration is increased to accommodate the new address and overwrites the data burst into the data portion. The main terminal detects when the data burst is withdrawn and signals the originating terminal to remove the data delay.

Abstract translation: 与主终端（102）串联互连的多个数据终端（101（1）〜101（b））之间的通信由具有数据部分的数据帧或分组提供，该数据部分用于容纳头部部分之前的突发数据， 容纳地址数据，后跟一个空/满“标志”位，指示收件人站是否撤回数据突发。 如果终端具有要发送的数据突发，则它定位一个空分组，在分组可能包含的任何先前的地址之后的分组中插入接收者指定，插入分组中通过的延迟，使得持续时间增加到 容纳新地址并将数据突发覆盖到数据部分中。 主终端检测数据突发何时被撤销，并发信号发起终端以消除数据延迟。

公开(公告)号：US4430526A

公开(公告)日：1984-02-07

申请号：US342112

申请日：1982-01-25

Applicant: Earl F. Brown ,  Arthur B. Larsen

Inventor： Earl F. Brown ,  Arthur B. Larsen

IPC: G06F3/00 ,  G06F3/033 ,  H04N1/417 ,  H04N7/36 ,  G08C21/00

CPC classification number: H04N19/507 ,  G06F3/03542 ,  G06F3/03545 ,  H04N1/4177

Abstract: An interactive graphics transmission system for use, illustratively, in video teleconferencing is described which advantageously reduces the amount of transmission bandwidth and user effort required to transmit changing graphical information. This is accomplished by first transmitting a full image of the graphic followed only by the changes which a conferee makes to that graphic. Those changes are determined by sensing the tilt of a light pen and the location of its tip, which is closest to the graphic, as a conferee manipulates the pen to change the graphic. The tilt of the pen primarily determines the mode in which the light pen is used. The mode information, in conjunction with the location of the pen's tip, is used to generate an instruction which specifies the way in which the graphic is to be changed, e.g., whether information is to be added to, deleted from or emphasized in a graphic. In addition, the location of the pen's tip specifies the address of that portion of the graphic that is to be changed. By transmitting just the instruction and address information while the user simultaneously manipulates the light pen to change a graphic, transmission bandwidth and user effort are both advantageously minimized.

Abstract translation: 描述了用于示例性地在视频电话会议中使用的交互式图形传输系统，其有利地减少了发送改变的图形信息所需的传输带宽和用户工作量。 这是通过首先传输图形的完整图像，然后仅由与会者对该图形进行的改变。 这些改变是通过感测光笔的倾斜和其最靠近图形的尖端的位置来确定的，因为与会者操纵笔改变图形。 笔的倾斜主要决定了使用光笔的模式。 结合笔尖的位置的模式信息用于生成指定图形被改变的方式的指令，例如，是否要在图形中添加，删除或强调信息 。 此外，笔尖的位置指定要更改的图形部分的地址。 通过在用户同时操纵光笔来改变图形的同时传输指令和地址信息，有利地最小化传输带宽和用户努力。

公开(公告)号：US4237553A

公开(公告)日：1980-12-02

申请号：US973181

申请日：1978-12-26

Applicant: Arthur B. Larsen

Inventor： Arthur B. Larsen

IPC: H04J3/24 ,  H04L12/43 ,  H04J6/00

CPC classification number: H04L12/43 ,  H04J3/245

Abstract: Communication between a plurality of data stations (100(1)-100(N)) serially interconnected by way of a line (101) arranged in a ring is provided by bit interleaved data packets. A control station generates framing signals to designate the start of each packet, staggering the packets so that only one packet header appears on the line at a time. Processing equipment (114) at each station monitors all the headers, seizing "empty" packets if the station has a data burst to send and reading the data burst if the packet is addressed thereto.

Abstract translation: 通过排列在环中的线路（101）串行互连的多个数据站（100（1）-100（N））之间的通信由位交织的数据分组提供。 控制站产生成帧信号以指定每个分组的开始，交错分组，使得一次只有一个分组报头出现在该行上。 每个站处理设备（114）监视所有报头，如果该站具有数据突发，则如果分组被寻址则发送和读取数据突发，则占用“空”分组。