公开(公告)号：US5373316A

公开(公告)日：1994-12-13

申请号：US26812

申请日：1993-03-05

申请人： Iwao Ishinabe ,  Nobuyuki Matsuyama ,  Nobuyoshi Torii ,  Shuichi Ishiwata ,  toshiaki Watanuki ,  Tomoki Kozono ,  Toshiyuki Sumida ,  Yoji Shibata ,  Kiyoshi Ishida

发明人： Iwao Ishinabe ,  Nobuyuki Matsuyama ,  Nobuyoshi Torii ,  Shuichi Ishiwata ,  toshiaki Watanuki ,  Tomoki Kozono ,  Toshiyuki Sumida ,  Yoji Shibata ,  Kiyoshi Ishida

IPC分类号： H04N1/00 ,  H04N7/14 ,  H04N7/15 ,  H04M11/00 ,  H04N7/12

CPC分类号： H04N7/147

摘要： A videoconference device connected to a general commercially available facsimile unit and having a function of sending/receiving a facsimile signal during communication. The videoconference device 1 has a facsimile connection terminal connected to a facsimile unit line connection terminal; a call unit for outputting a call signal for a general analog telephone; a 2W/4W convertor for converting a signal from a 2-line facsimile unit to a signal in a 4-line system where the sending and receiving of signals are separated; a voice band signal encode/decode unit for encoding/decoding a facsimile voice band signal; a power supply for supplying to the facsimile connection terminal a voltage/current which meets the standards of a general analog telephone set; a first current detector for detecting the flow of a current on the basis of supply power from the power supply; a first switching unit for selecting whether a signal from the facsimile connection terminal should be connected to the call unit or to a circuit composed of the power supply, 2W/4W converter, and first current detector; a videoconference control unit: and a multiplexing/demultiplexing control unit for multiplexing the encoded/decoded facsimile voice band signal with a video/voice signal and for demultiplexing the multiplexed signal into facsimile voice band signal, a video/voice signal.

摘要翻译： 一种视频会议装置，连接到一般商业传真机，并且具有在通信期间发送/接收传真信号的功能。 视频会议装置1具有连接到传真单元线路连接终端的传真连接终端; 用于输出通用模拟电话的呼叫信号的呼叫单元; 2W / 4W转换器，用于将来自2线传真单元的信号转换成信号的发送和接收被分离的4线系统中的信号; 用于对传真语音频带信号进行编码/解码的语音频带信号编码/解码单元; 用于向传真连接端子提供满足通用模拟电话机的标准的电压/电流的电源; 第一电流检测器，用于基于来自电源的供电来检测电流的流动; 第一切换单元，用于选择来自传真连接终端的信号是否应连接到呼叫单元或由电源2W / 4W转换器和第一电流检测器组成的电路; 一个视频会议控制单元和一个复用/解复用控制单元，用于将编码/解码的传真语音频带信号与视频/语音信号进行多路复用，并将复用的信号解复用为传真语音频带信号，视频/语音信号。