知搜-全球专利检索

  1. 登录
  2. 注册

搜索结果

15 条记录 (耗时 0.013 秒)

    Digital slope threshold data compressor
    5.
    发明授权
    Digital slope threshold data compressor 失效
    数字斜率数据压缩机

    公开(公告)号：US3694581A

    公开(公告)日：1972-09-26

    申请号：US3694581D

    申请日：1971-05-13

    申请人： NASA

    发明人： ANDERSON TAGE O

    IPC分类号： G06F17/40 ,  H03H17/06 ,  H04B1/66

    CPC分类号： H03H17/0664 ,  H03H17/0621

    摘要： Apparatus is disclosed for data compression by a decreasing slope threshold test using digital techniques in which the data stream through an input register is examined and only those samples of the raw data are selected for transmission which have a first difference (slope) that exceeds an exponentially decaying threshold function relative to a bias. If a sample is transmitted, it becomes the new bias and a generator of the threshold function is reset. For threshold comparison, the bias is first subtracted from each first difference to produce a second difference for direct comparison of its absolute value with the absolute value of the threshold function, thereby allowing the function generator to run from a constant reference to generate a single sided exponentially decaying function.

    摘要翻译： 公开了通过使用数字技术的递减斜率阈值测试来进行数据压缩的装置，其中检查通过输入寄存器的数据流，并且仅选择原始数据的那些采样，其中第一个差异（斜率）超过指数 衰减阈值函数相对于偏差。 如果样本被传输，则变为新的偏置，并且阈值函数的发生器被复位。 对于阈值比较，首先从每个第一个差值中减去偏差，以产生第二个差值，用于将其绝对值与阈值函数的绝对值进行直接比较，从而允许函数发生器从常量参考运行，以生成单面 指数衰减函数。

    Modular encoder
    6.
    发明授权
    Modular encoder 失效
    模块化编码器

    公开(公告)号：US3603976A

    公开(公告)日：1971-09-07

    申请号：US3603976D

    申请日：1969-09-24

    申请人： NASA

    发明人： ANDERSON TAGE O

    IPC分类号： H03M5/00 ,  H03M13/05 ,  H03K13/256

    CPC分类号： H03M13/05 ,  H03M5/00

    摘要： A biorthogonal encoder of modular design with each module operating in a serial or cyclic mode. The number of modules M is equal to N/2 if N, the number of bits of the data word, is even, or to (N+1)2 if N is odd. Each module includes a 2-bit shift register, a storage bit and a mod 2 gate. The input to the register is a mod 2 function of the register''s output and that of the storage bit. The outputs of all the M modules are added mod 2 to provide the 2N bits of each code word in sequence.

    Asynchronous, multiplexing, single line transmission and recovery data system
    7.
    发明授权
    Asynchronous, multiplexing, single line transmission and recovery data system 失效
    异步，多路复用，单线传输和恢复数据系统

    公开(公告)号：US3889064A

    公开(公告)日：1975-06-10

    申请号：US45516374

    申请日：1974-03-27

    申请人： NASA ,  ANDERSON TAGE O

    发明人： FLETCHER JAMES C ADMINISTRATOR ,  ANDERSON TAGE O

    IPC分类号： H04B7/212 ,  H04J3/24 ,  H04J3/06

    CPC分类号： H04B7/2125 ,  H04J3/24

    摘要： Asynchronously multiplexed sample data sub-systems employ transmission over a single line to a remote synchronizer and demultiplexer. At the remote synchronizer, the data is recovered by synchronizing signals derived from the data itself. A sub-system, or satellite location, supplies continuously sampled binary data along with a satellite identification and synchronizing sequence as a satellite message frame. This information is supplied bit-serially, to a multiplexer junction. The multiplexed satellite information is delivered asynchronously onto a single line transmission channel with other like bit serial satellite message information from other satellite monitoring sites. Such satellite information is transmitted to a central collection and analysis site where it is demultiplexed according to the words and bits that make up a satellite message frame. At least two message frames from each satellite monitoring site are always placed on the single transmission channel as a single block of data for that satellite. This technique, at the demultiplexer, assures proper recognition of a desired message frame based upon a comparison of satellite identification sequences and a frame synchronization sequence.

    Digital quasi-exponential function generator
    8.
    发明授权
    Digital quasi-exponential function generator 失效
    数字量子功能发生器

    公开(公告)号：US3632996A

    公开(公告)日：1972-01-04

    申请号：US3632996D

    申请日：1970-05-14

    申请人： NASA

    发明人： ANDERSON TAGE O ,  HURD WILLIAM J

    IPC分类号： G06F1/02 ,  G06F7/68 ,  H03K23/66 ,  G06M3/00

    CPC分类号： G06F1/02 ,  G06F7/68 ,  G06F2101/10 ,  H03K23/667

    摘要： A quasi-exponential function generator comprising a multistage counter which is clocked at a rate which is a function of the count or value of the counter. The possible counts are divided into fields which are sensed and the clock rate is reduced by a factor of two, as the count changes from one field to a lower field. Each field is further divided into several subfields which are also detected to control the clock rate to vary from subfield to subfield.

    摘要翻译： 准指数函数发生器，其包括以与计数器的计数或值的函数对应的速率计时的多级计数器。 可能的计数被划分为被感测的场，并且时钟速率被减少了2倍，因为计数从一个场改变到较低的场。 每个场进一步划分为几个子场，这些子场也被检测为控制从子场到子场的时钟速率。

    Multi-computer multiple data path hardware exchange system
    10.
    发明授权
    Multi-computer multiple data path hardware exchange system 失效
    多计算机多路数据通道硬件交换系统

    公开(公告)号：US3916380A

    公开(公告)日：1975-10-28

    申请号：US52160174

    申请日：1974-11-06

    申请人： NASA ,  ANDERSON TAGE O

    发明人： FLETCHER JAMES C ADMINISTRATOR ,  ANDERSON TAGE O

    IPC分类号： G06F13/40 ,  G06F15/173 ,  H04Q11/00

    CPC分类号： G06F13/4022 ,  G06F15/17368

    摘要： A switch controller in a multi-computer processing system functions to establish a data path between any two computers in the system and maintain that data path, without interference, while establishing other independent unidirectional data paths with other pairs of computers. All computers in the system are continuously and rapidly scanned for a request-to-send signal. Those computers that are already engaged in data transmission are leap-frogged by the scanning mechanism. When a request-to-send signal is detected by a particular scanning mechanism, that scanning mechanism stops at the computer generating the request, to provide for an interconnection between the requesting sender and the intended receiver. If during this interconnection phase, it is determined that the intended receiver is occupied, the interconnection is prevented from being completed and the scanning mechanism is instructed to resume scanning of the computers for another request-to-send signal.

    摘要翻译： 多计算机处理系统中的开关控制器用于在系统中的任何两台计算机之间建立数据路径，并在不影响的情况下保持该数据路径，同时与其他计算机对建立其他独立的单向数据路径。 系统中的所有计算机都会连续快速地扫描请求发送信号。 那些已经从事数据传输的计算机被扫描机制所跳过。 当通过特定扫描机构检测到请求发送信号时，该扫描机制在生成请求的计算机停止，以提供请求发送者和预期接收者之间的互连。 如果在该互连阶段期间，确定预期的接收机被占用，则防止互连完成，并且指示扫描机制恢复对计算机的扫描以用于另一个请求发送信号。