公开(公告)号：US5136628A

公开(公告)日：1992-08-04

申请号：US210940

申请日：1988-06-24

申请人： Shoji Araki ,  Yukinobu Takano ,  Tadahisa Yamamoto ,  Noriyuki Uchiumi

发明人： Shoji Araki ,  Yukinobu Takano ,  Tadahisa Yamamoto ,  Noriyuki Uchiumi

IPC分类号： H04N19/423 ,  H04N7/01 ,  H04N7/14 ,  H04N7/24 ,  H04N19/00 ,  H04N19/80 ,  H04N19/85

CPC分类号： H04N7/141 ,  H04N19/587 ,  H04N7/01 ,  H04N7/24

摘要： A video telephone for transmitting video data of a still picture through an audio signal line includes an image pickup tube for picking up a picture of the still picture, an A/D (analog-to-digital) converter for converting the analog output picked up by the image pick-up tube to the form of a digital signal, a memory for storing the output of the A/D converter as video data, a modulating circuit for modulating the video data stored in the memory into a modulated signal of an occupied frequency band corresponding to a transmission band of the signal line, a circuit for transmitting the modulated output of the modulating circuit to the signal line, a circuit for generating a synchronizing pulse and a frequency-dividing circuit for frequency-dividing the color subcarrier signal to provide signals necessary for the A/D converter, the memory, and the modulating circuit, wherein the video data is a signal which results from thinning the picked-up output at a predetermined ratio.

摘要翻译： 用于通过音频信号线传输静止图像的视频数据的视频电话包括用于拾取静止图像的图像的图像拾取管，用于转换拾取的模拟输出的A / D（模数转换器）转换器 通过图像拾取管以数字信号的形式存储用于将A / D转换器的输出存储为视频数据的存储器，用于将存储在存储器中的视频数据调制成被占用的调制信号的调制电路 对应于信号线的发送频带的频带，用于将调制电路的调制输出发送到信号线的电路，用于产生同步脉冲的电路和用于将彩色副载波信号分频的分频电路 提供A / D转换器，存储器和调制电路所需的信号，其中视频数据是以预定比例将拾取输出变薄所产生的信号。