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楼宇可视对讲系统是现代住宅强制性配套设施,近年来房地产业的兴盛发展为楼宇可视对讲系统的广泛应用提供了一个很好的契机。在楼宇可视对讲的实际应用中,通常采用模拟复合视频信号(CVBS)进行信息传输。在信号传输、数据采集过程中,常常会因为输入信号强度变化较大,且与系统的动态范围不相一致,使系统不能正常工作。例如,在接收器中,无线电信号强弱
Building visual intercom system is a compulsory supporting facilities for modern residences. In recent years, the booming real estate industry has provided a good opportunity for the widespread application of building video intercom system. In the practical application of building video intercom, analog composite video signal (CVBS) is usually used for information transmission. During signal transmission and data acquisition, the system often can not work normally because the input signal intensity varies greatly and the system dynamic range is not consistent. For example, in the receiver, the radio signal strength