公开(公告)号：US3646256A

公开(公告)日：1972-02-29

申请号：US3646256D

申请日：1970-03-24

Applicant: COMFAX COMMUNICATIONS IND INC

Inventor： JACOB GERALD W ,  MOGUL EUGENE ,  BOROS PAUL Z ,  SCHIFF DAVID ,  READER MALCOLM ,  KAMEN IRA

IPC: H04N1/17 ,  H04N3/32

CPC classification number: H04N1/17

Abstract: A facsimile transmitter comprises means for scanning a document to produce signals corresponding to the dark and light areas of the document. Those signals are transferred to the receiver at one of two predetermined rates-fast or slow-depending on the content of the document. If desired, the rate of scanning may also be varied according to that content. Signals having a low information value are thereby transmitted at a higher rate than signals having a high information content.

Abstract translation: 传真发射机包括用于扫描文件以产生对应于文件的暗部和浅色区域的信号的装置。 取决于文件的内容，这些信号以两个预定速率之一 - 快速或慢速地传送到接收器。 如果需要，扫描速率也可以根据该内容而变化。 因此，以比具有高信息量的信号更高的速率发送具有低信息值的信号。