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公开(公告)号：US4296439A
公开(公告)日：1981-10-20
申请号：US150100
申请日：1980-05-15
申请人： Hiroichi Teramura , Yasuhiro Yamazaki , Yasushi Wakahara , Naohiko Hattori , Seiichi Yamamoto , Kouzo Nakao
发明人： Hiroichi Teramura , Yasuhiro Yamazaki , Yasushi Wakahara , Naohiko Hattori , Seiichi Yamamoto , Kouzo Nakao
CPC分类号： H04N1/33361 , H04L7/0083 , H04N1/3333 , H04N1/413 , H04N2201/33357
摘要： In a digitalized facsimile transmission system, (k) number of scanning lines (k=2 or 4) are encoded to a relative address code and the next scanning line is encoded to a run length code, and each scanning line has the related synchronization code pattern corresponding either said relative address code or said run length code. Thus, the effect of a transmission error is restricted within one scanning line when that error occurs in the scanning line encoded to run length code, or k lines when that error occurs in the scanning line encoded to relative address code. The value (k) is switched between k=2 and k=4 according to the instantaneous quality of a communication line. When the quality is good, k=4 is selected, and when the quality is bad, k=2 is selected. The reception side can switch the decoding systems between relative address decode and run length decode, by being controlled through the related synchronization code patterns.A synchronization code pattern has a plurality of O's inserted between a pair of 1's (1000 . . . 0001), and the number of O's between said 1's indicates one of relative address code and run length code.In order to discriminate a facsimile information from a synchronization code pattern, when the facsimile information has the more continuous O's than (n), an idle signal having the value "1" is inserted in every (n-1) number of continuous O's of the facsimile information. Said idle signal is deleted automatically in the receiver.
摘要翻译： 在数字化传真传输系统中，（k）扫描线数（k = 2或4）被编码为相对地址码，下一扫描线被编码为游程长度码，并且每条扫描行具有相关的同步码 模式对应于所述相对地址代码或所述游程长度代码。 因此，当编码为运行长度码的扫描线中发生错误时，传输错误的影响被限制在一条扫描行内，或者当编码到相对地址码的扫描行中出现该错误时，传输误差的影响被限制在k行。 根据通信线路的瞬时质量，在k = 2和k = 4之间切换值（k）。 当质量好时，选择k = 4，当质量不好时，选择k = 2。 接收侧可以通过相关的同步码模式进行控制，在相对地址解码和游程长度解码之间切换解码系统。 同步代码模式具有插入在一对1（1000 ... 0001）之间的多个O，并且所述1之间的O数表示相对地址码和游程长度码之一。 为了区分传真信息与同步码模式，当传真信息具有比（n）更连续的O时，具有值“1”的空闲信号被插入到每（n-1）个连续O 传真信息。 所述空闲信号在接收机中自动删除。
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公开(公告)号：US4150401A
公开(公告)日：1979-04-17
申请号：US919613
申请日：1978-06-27
申请人： Seiichi Yamamoto , Kozo Nakao , Naohiko Hattori , Hiroichi Teramura , Yasuhiro Yamazaki , Yasushi Wakahara
发明人： Seiichi Yamamoto , Kozo Nakao , Naohiko Hattori , Hiroichi Teramura , Yasuhiro Yamazaki , Yasushi Wakahara
IPC分类号： H04N1/40
CPC分类号： H04N1/40068
摘要： A facsimile signal converter for converting an input facsimile signal into an output facsimile signal having a scanning line density different from that of the input facsimile signal. A table circuit is provided for developing white and black states of each output picture element of the output facsimile signal in correspondence to a predetermined number of combinations of states of reference picture elements and the geometric relation between the reference picture elements and the output picture elements. The reference picture element corresponds to at least one input picture element of the input facsimile signal adjacent to each output picture element of the output facsimile signal in consideration of a state of superimposing an input pattern on an output pattern indicated respectively by the input facsimile signal and the output facsimile signal. The white and black states of the output picture elements are read out from the table circuit to provide the output facsimile signal in response to each input picture element of the input facsimile signal on the base of the instant conditions of the geometric relation and the reference picture elements.
摘要翻译： 一种传真信号转换器，用于将输入传真信号转换成具有与输入传真信号不同的扫描线密度的输出传真信号。 提供表电路，用于根据预定数量的参考图像元素的状态的组合以及参考图像元素和输出图像元素之间的几何关系来显示输出传真信号的每个输出像素的白色和黑色状态。 考虑到将输入图案叠加在由输入的传真信号分别指示的输出图案上的状态，参考图像元素对应于与输出传真信号的每个输出图像元素相邻的输入传真信号的至少一个输入图像元素，以及 输出传真信号。 从表格电路中读出输出图像元素的白色和黑色状态，以便根据几何关系的瞬时条件和参考图像来响应输入传真信号的每个输入图像元素提供输出传真信号 元素。
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公开(公告)号：US4134133A
公开(公告)日：1979-01-09
申请号：US817421
申请日：1977-07-20
摘要： A method for interline-coding a facsimile signal, in which information of scanning lines of the input facsimile signal is alternately divided into information of at least one first unit line and information of at least one second unit line. A first one of the first unit lines is first coded in accordance with a predetermined coding principle. The information of the next one of the first unit lines is secondly coded in accordance with a predetermined coding principle prior to coding of information of the first one of said second unit lines. The information of the first one of the second unit lines is thirdly coded by two-dimensional predictive coding using, as reference information, the information of the first one and the next one of the first unit lines. The operations of the second coding and the operation of the third coding are repeatedly achieved thereafter.
摘要翻译： 一种用于对传真信号进行行间编码的方法，其中将输入传真信号的扫描线的信息交替划分为至少一个第一单元行的信息和至少一个第二单位行的信息。 首先根据预定的编码原理对第一单元线进行编码。 在对第一单元线中的第一单元线的信息进行编码之前，根据预定的编码原理对下一个第一单元行的信息进行二次编码。 第二单元行中的第一单元行的信息通过使用第一单元行中的第一单元行和下一个单元行的信息作为参考信息的二维预测编码进行第三编码。 此后重复实现第二编码的操作和第三编码的操作。
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公开(公告)号：US4115815A
公开(公告)日：1978-09-19
申请号：US737072
申请日：1976-11-01
CPC分类号： G06T9/005 , H04N1/4175
摘要： A facsimile signal coding method, in which information change picture elements are classified into two kinds of change points according to the information change directions. In case of the information change picture element having an information change from white to black, the relative distance between an instant information change picture element and a reference information change picture element selected from information change picture elements on the same scanning line or at least one immediately preceding scanning line is coded. In case of the information change picture element having an information change from black to white, the distance between an instant information change picture element to be coded and the immediately preceding information change picture element is predicted on the basis of information of a run already coded, so that an error between the predicted value and the run length of the instant run is coded. If the error exceeds the run length of the instant run, the run length of the instant run may be exceptionally coded.
摘要翻译： 一种传真信号编码方法，其中根据信息改变方向将信息改变图像元素分为两种变化点。 在具有从白色变为黑色的信息的信息改变图像元素的情况下，即时信息改变图像元素与从相同扫描线上的信息改变图像元素中选择的参考信息改变图像元素之间的相对距离或者立即 前面的扫描行被编码。 在具有从黑到白的信息变化的信息改变图像元素的情况下，基于已经编码的游程的信息预测要编码的即时信息改变图像元素与紧接在前的信息改变图像元素之间的距离， 使得即时运行的预测值和游程长度之间的误差被编码。 如果该错误超出即时运行的运行长度，则即时运行的运行长度可能被异常编码。
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公开(公告)号：US4097903A
公开(公告)日：1978-06-27
申请号：US736738
申请日：1976-10-29
CPC分类号： H04N1/4175 , G06T9/005
摘要： A facsimile signal coding system for successively coding runs of black and white signals included in a facsimile signal obtained by scanning an original picture, in which the length and position on a scanning line of the runs of the black or white signal to be indicated by encoded codes are temporarily stored in a memory. Information of the run of the same state signal as an instant run of black or white signal to be coded and close to the instant run is taken out as reference run information from the memory. The length of the instant run of the black or white signal to be coded is predicted on the base of the reference run information. An error between the predicted run length and the length of the instant run of black or white signal to be coded is coded. When the error exceeds a predetermined value, the length of the instant run of the black or white signal may be coded in place of the error.
摘要翻译： 一种传真信号编码系统，用于连续编码通过扫描原始图像获得的传真信号中包括的黑白信号的运行，其中通过编码的黑色或白色信号的行程的扫描行上的长度和位置 代码暂时存储在存储器中。 作为来自存储器的参考运行信息，作为要编码并接近即时运行的黑色或白色信号的即时运行的相同状态信号的运行信息被取出。 基于参考运行信息来预测要编码的黑色或白色信号的瞬间的长度。 编码预测的游程长度与要编码的黑色或白色信号的瞬间的长度之间的误差。 当误差超过预定值时，黑色或白色信号的瞬间的长度可以被编码而不是错误。
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公开(公告)号：US4090222A
公开(公告)日：1978-05-16
申请号：US732600
申请日：1976-10-15
CPC分类号： H04N1/413
摘要： A system for receiving an input facsimile signal sometimes added with dummy codes for each predetermined number of scanning lines by the use of a decoder for decoding the input facsimile signal for each information block of picture elements on the predetermined number of scanning lines. The number of bits of the input facsimile signal corresponding to the picture elements of the predetermined number of scanning lines is counted by a counter. When the count result of the counter is smaller than a reference bit number predetermined in consideration of the subscanning time of a receiver, the subscanning of the receiver is omitted. In this case, an operation of feeding a recording paper of the receiver may be effected.
摘要翻译： 一种用于接收输入传真信号的系统，有时通过使用用于对预定数量的扫描线上的图像元素的每个信息块解码输入传真信号的解码器，为每个预定数量的扫描线添加虚拟代码。 通过计数器对与预定数量的扫描线的像素对应的输入传真信号的位数进行计数。 当计数器的计数结果小于考虑到接收机的副扫描时间预定的参考比特数时，省略了接收机的副扫描。 在这种情况下，可以进行馈送接收机的记录纸的操作。
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公开(公告)号：US4236248A
公开(公告)日：1980-11-25
申请号：US898020
申请日：1978-04-20
IPC分类号： H04L27/18 , H04L27/00 , H04L27/20 , H04L27/227
CPC分类号： H04L27/227 , H04L27/205
摘要： A transmission speed switching system for a transmission system having at each party of said transmission system a plurality of data MODEMs of different transmission speeds b.sub.1, b.sub.2, . . . b.sub.n, in which a carrier is modulated by a code train at intervals of a time S equal to a common multiple of symbol intervals S.sub.1, S.sub.2, . . . S.sub.n respectively corresponding to the transmission speeds in a manner to obtain a predetermined modulated wave which instructs said MODEMs of the other party the switching to a specified one of the transmission speeds, and in which the modulated wave is transmitted to the receiving station so that a demodulated code by a demodulator of any of the transmission speeds may be interpreted as the code train indicating the specified transmission speed to be selected by the receiving station, thereby switching the transmission speed to the specified one corresponding to the result of the interpretation.
摘要翻译： 一种用于传输系统的传输速度切换系统，在所述传输系统的每一方具有不同传输速度b1，b2，...的多个数据调制解调器。 。 。 bn，其中以等于符号间隔S1，S2的公倍数的时间S的码串调制载波。 。 。 Sn分别对应于传输速度，以获得指示对方的所述MODEM切换到指定的一个传输速度的预定调制波，并且其中调制波被发送到接收站，使得 通过任何传输速度的解调器的解调码可以被解释为表示由接收站选择的指定传输速度的代码串，从而将传输速度切换到对应于解释结果的指定传输速度。
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8.发明授权Method for coding addresses of information change picture elements in facsimile signal 失效用于对传真信号中的信息改变图像元素的地址进行编码的方法
公开(公告)号：US4212036A
公开(公告)日：1980-07-08
申请号：US740716
申请日：1976-11-10
CPC分类号： H04N1/4175
摘要： A method for coding addresses of information change picture elements each having information different from that of the immediately preceding picture element in a facsimile signal obtained by successively scanning an original picture, in which the information change picture elements are classified into deviation change points each having a high correlation to a final reference change point selected from coded information change picture elements, and new change points each having substantially no correlation to the final reference change point. The deviation change points are coded to indicate the direction and length of each deviation thereof from the corresponding final reference change point. The new change points are coded to indicate each distance thereto from the immediately preceding information change picture element.
摘要翻译： 一种用于对通过连续扫描原始图像而获得的传真信号中具有与紧接在前的图像元素不同的信息的信息改变图像元素的地址编码的方法，其中信息改变图像元素被分类为各自具有 与从编码信息改变图像元素中选择的最终参考变化点的高相关性，以及与最终参考变化点基本上没有相关性的新的变化点。 偏差变化点被编码以指示其与相应的最终参考变化点的每个偏差的方向和长度。 新的改变点被编码以指示从紧接在前的信息改变图像元素的每个距离。
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公开(公告)号：US4212035A
公开(公告)日：1980-07-08
申请号：US913038
申请日：1978-06-07
CPC分类号： H04N1/4175
摘要： A facsimile signal coding system, in which a facsimile signal is divided into a plurality of scanning line groups each including a predetermined number of scanning lines. A substantially central one of the scanning lines of each group is encoded by a coding method without referring to information of a scanning line adjacent to the central scanning line. Information of the remaining lines above the central scanning line is sequentially encoded upwardly from the central scanning line using information of the just precedently encoded line as reference information. Information of the remaining lines below the central scanning line is sequentially encoded downwardly from the central scanning line using information of the just precedently encoded line as reference information.
摘要翻译： 一种传真信号编码系统，其中传真信号被分成多个扫描线组，每个扫描线组包括预定数量的扫描线。 每个组的扫描线的大致中央的一个通过编码方法编码，而不参考与中央扫描线相邻的扫描线的信息。 使用刚刚编码的行的信息作为参考信息，从中央扫描线向上依次编码中央扫描线上方剩余行的信息。 使用刚刚编码的线的信息作为参考信息，从中央扫描线向下顺序编码中央扫描线下方的剩余行的信息。
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公开(公告)号：US4131915A
公开(公告)日：1978-12-26
申请号：US732597
申请日：1976-10-15
CPC分类号： H04N1/419
摘要： A facsimile signal transmission system, in which a coder is provided for coding an input facsimile signal for each information block of picture elements on a predetermined number of scanning lines. A counter is provided for counting the number of bits of each coded output corresponding to the picture elements of the predetermined number of scanning lines. Dummy codes are added to the coded output of the coder to increase the number of bits of the coded output to be larger than a reference bit number predetermined in consideration of the subscanning time at the receiving side in a case where the count result of the counter is smaller than the reference bit number.
摘要翻译： 一种传真信号传输系统，其中提供编码器用于对预定数目的扫描线上的每个图像元素的信息块进行编码输入传真信号。 提供计数器，用于对与预定数量的扫描线相对应的每个编码输出的位数进行计数。 在编码器的编码输出中添加虚拟码，以便在计数器的计数结果的情况下将编码输出的位数大于考虑到接收侧的副扫描时间预定的参考位数 小于参考位数。
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