1、 I 图像转换系统 摘要 本设计主要是根据一个在有线或无线条件下，应用了单片机编程技术，双工 对讲技术、摄像及视频显示技术而设计的一种可视对讲智能系统。该系统采用模 数混合技术，即语音数字，视频模拟。视频信号为模拟传输；音频信号及控制信 号为数字传输，设计是以单片机 AT89C2051 作为系统控制核心，配以呼叫检测模 块、摘挂机检测模块、视频显示及控制模块、开锁和音频信号输入/控制模块、音 频信号输入放大模块、音频信号输出前置放大模块以及按键组成形成图像转换。 智能电视监控门铃系统是新一代电子安全防范系统，是一种理想的安全防范 装置。家人可以在室内，通过电视屏幕看图像、语音对讲，远距离了解门
2、外的情 况，准确判断来访者的身份，决定是否开门接待，保障家庭的人身和财产安全。 人们迫切需要一种不仅安全可靠图像清晰、通话可靠、显示准确、灵敏度高而且 造型独特、新颖美观等优点于一体的智能产品智能电视监控门铃系统，因此 图像转换系统是本课题研究的目标。 关键词：图像转换系统，智能化，单片机 II IMAGE CONVERSION SYSTEM ABSTRACT At present, Chinas housing development has entered a new period of development, the intelligent systems have been used
3、 as intelligent office and intelligent residential district is an important component of design is mainly based on a wired or wireless condition, application of microcontroller programming techniques, duplex intercom technology, camera and video display technology and the design of a visual intercom
4、 intelligent system The system uses hybrid technology, namely speech digital, video simulation The video signal is an analog transmission; audio frequency signal and a control signal to digital transmission, the design is based on SCM AT89C2051 as control core, with call detection module, a picking
5、and hanging detection module, video display and control module, unlocking and audio signal input / control module, an input audio signal amplification module, an audio signal output amplifier module and key component to form an image conversion. Intelligent television monitoring doorbell system is a
6、 new generation of electronic security systems, and is an ideal safety device Families in the interior, through the TV screen image, speech communication, remote understanding outside, to accurately judge the identity of visitors, decide whether or not to open the door to receive the support of family, personal and property safety People need urgently a not only safe and reliable image clarity, accurate, reliable, call showed high sensitivity and unique shape, novel appearance on the advantag
