公开(公告)号：US4353095A

公开(公告)日：1982-10-05

申请号：US6245

申请日：1979-01-24

申请人： Kenzou Tatematsu ,  Yasuhiro Sugihara ,  Hiroyuki Andou ,  Tatsuo Seki ,  Yoshito Dezaki ,  Yasukazu Nishino

发明人： Kenzou Tatematsu ,  Yasuhiro Sugihara ,  Hiroyuki Andou ,  Tatsuo Seki ,  Yoshito Dezaki ,  Yasukazu Nishino

IPC分类号： H04N1/415 ,  H04N7/12

CPC分类号： H04N1/415

摘要： A facsimile bandwidth compression method using a facsimile signal comprising a synchronizing signal part, a control signal part having digital signals made by coding signals of existence or non-existence of substantial picture information in blocks which are made by dividing the picture information signal into a specified uniform length segment, and a picture information part consisting of picture information signal of the blocks containing at least one black picture element. A reference signal having an inverted carrier phase from that of the synchronizing signal part is inserted between the synchronizing signal part and the control part. The coding of the digital signal is made by inverting the carrier phase. Guard bands having specified levels are inserted between the blocks, thereby assuring more accurate and fine synchronization than the known WBS (white block skipping) art, and hence, a very clear reproduced picture.

摘要翻译： 一种使用传真信号的传真带宽压缩方法，该传真信号包括同步信号部分，具有数字信号的控制信号部分，所述控制信号部分通过将通过将图像信息信号分成指定的块中的大块图像信息存在或不存在实质图像信息 以及由包含至少一个黑色图像元素的块的图像信息信号组成的图像信息部分。 具有与同步信号部分相反的载波相位的参考信号插入同步信号部分和控制部分之间。 通过反相载波相位来进行数字信号的编码。 具有指定级别的保护带被插入在块之间，从而确保比已知的WBS（白色块跳过）技术更准确和精细的同步，因此，非常清楚的再现图像。