公开(公告)号：US3879582A

公开(公告)日：1975-04-22

申请号：US44726574

申请日：1974-03-01

Applicant: RCA CORP

Inventor： WHITE HUGH EDWARD ,  MAXEMCHUK NICHOLAS FRANK

IPC: H04L12/437 ,  H04L25/02 ,  H04J3/08

CPC classification number: H04L12/437 ,  H04L25/0262

Abstract: A loop digital data communications system in which a plurality of data processing units are connected in series with each other in the loop. Each data processor has a terminal device associated therewith for providing and receiving digital signals. The loop system also includes a loop controller connected in series in the loop with the data processors. The controller provides framed time division multiplexed channels for communication between terminal devices and a loop time delay to insure that each of the data processor transmits and receives signals in a selected channel over successive frames. The data processors are arranged to handle a plurality of synchronous data rates so that terminal devices at a plurality of data rates are serviced by the loop system. In addition, the data processors include a sampling technique so that asynchronous terminal devices may also be utilized with the system.

Abstract translation: 一种循环数字数据通信系统，其中多个数据处理单元在循环中彼此串联连接。 每个数据处理器具有与其相关联的终端设备，用于提供和接收数字信号。 环路系统还包括一个与数据处理器在环路中串联连接的环路控制器。 控制器提供用于终端设备之间通信的帧时分多路复用通道和循环时间延迟，以确保数据处理器中的每一个在连续的帧上以所选通道发送和接收信号。 数据处理器被布置为处理多个同步数据速率，使得以多个数据速率的终端设备由循环系统服务。 此外，数据处理器包括采样技术，使得异步终端设备也可以与系统一起使用。

公开(公告)号：US3927251A

公开(公告)日：1975-12-16

申请号：US51303874

申请日：1974-10-07

Applicant: RCA CORP

Inventor： WHITE HUGH EDWARD ,  LIPPMAN MICHAEL DAVID

IPC: G06T9/00 ,  H04N1/417 ,  H04N7/12

CPC classification number: G06T9/005 ,  H04N1/4175

Abstract: A method and apparatus for the detection and control of errors occurring in two-dimensionally compressed image data, which method and apparatus take particular advantage of the data structure utilized in two-dimensionally compressed image data facsimile systems. The detection and control apparatus operates as an integral part of the facsimile system and is therefore implemented by a minimum amount of additional hardware.

Abstract translation: 一种用于检测和控制二维压缩图像数据中出现的错误的方法和装置，该方法和装置特别地利用了二维压缩图像数据传真系统中使用的数据结构。 检测和控制装置作为传真系统的组成部分进行操作，因此由最小量的附加硬件来实现。

公开(公告)号：US3879710A

公开(公告)日：1975-04-22

申请号：US44722074

申请日：1974-03-01

Applicant: RCA CORP

Inventor： MAXEMCHUK NICHOLAD FRANK ,  WHITE HUGH EDWARD

IPC: G06F13/42 ,  H04L12/43 ,  H04L25/24 ,  H04J3/12

CPC classification number: H04L12/43 ,  G06F13/4247 ,  H04L25/242

Abstract: A data processor for a time division multiplexed communications system. A plurality of such data processors are connected in series in a loop configuration, each having a data terminal associated therewith, for establishing a connection between data processors in a time division multiplexed channel. Each data processor demodulates the signal on the loop, extracts timing information from the loop signal and locates the channel to be used for establishing the connection between itself and another data processor. Each data processor in addition, regenerates and passes on data not intended for that data processor. Data found in the correct or selected channel is provided to the data terminal which may be a synchronous or an asynchronous device. Data from the terminal is inserted into the selected channel, modulated in accordance with a particular rule and transmitted onto the loop to another data processor operating in the selected channel.

Abstract translation: 一种用于时分复用通信系统的数据处理器。 多个这样的数据处理器以环路配置串联连接，每个环路配置具有与其相关联的数据终端，用于在时分复用信道中建立数据处理器之间的连接。 每个数据处理器对循环中的信号进行解调，从循环信号中提取定时信息，并定位要用于建立自身与另一个数据处理器之间的连接的通道。 每个数据处理器另外还可以重新生成并传递不适用于该数据处理器的数据。 在正确或选择的信道中找到的数据被提供给可以是同步或异步设备的数据终端。 来自终端的数据被插入所选择的信道中，根据特定规则进行调制，并将其发送到在所选择的信道中操作的另一个数据处理器。