摘要
在可见光语音视频的实时传输中,系统对速率要求较高。为了降低传输速率,在发送端利用现场可编程门阵列(FPGA)调制模块分别采集视频数据和语音数据,然后加载至对应的发光二极管(LED)驱动电路,将2路LED发出的光同时投射到光电探测器上;接收端根据光/电转换之后的电压信号进行强度判别,分离出语音数据和视频数据,分别传输至对应的终端。实验证明该系统在传输速率相对较低的情况下可以进行实时语音视频的传输。
In the real-time transmission of audio and video in visible light,the system requires high speed.In order to reduce the transmission rate,video data and audio data are collected by field programmable gate array(FPGA)modulation module at the transmitting end,and then loaded into the corresponding light emitting diode(LED)driver circuit,the light from two LEDs is projected to the photodetector at the same time,and the receiving end separates the audio data and video data according to the intensity of the voltage signal after the photoelectricity conversion,and transmits them to the corresponding terminal.Experimental results show that the system can transmit real-time audio and video at a relatively low transmission rate.
作者
董德壮
万生鹏
尹玺
熊新中
谭超
DONG Dezhuang;WAN Shengpeng;YIN Xi;XIONG Xinzhong;TAN Chao(Jiangxi Engineering Laboratory for Optoelectronics Testing Technology,Nanchang Hangkong University,Nanchang 330063,China;National Engineering Laboratory for Nondestructive Testing and Optoelectric Sensing Technology and Application,Nanchang Hangkong University,Nanchang 330063,China)
出处
《光通信技术》
北大核心
2020年第12期25-28,共4页
Optical Communication Technology
基金
国家自然科学基金资助项目(61465009、61067005)资助
江西省主要学科学术和技术带头人资助计划项目(20172BCB22012)资助。
关键词
可见光通信
信号强度
调制/解调
现场可编程门阵列
混合传输
visible light communication
signal intensity
modulation and demodulation
field programmable gate array
hybrid transmission
