在对水印和密码技术进行深入研究的基础上，针对户外LED广告内容监控问题，本文提出一种新的监控管理方案。该方案对视频数据嵌入版权保护的水印信息再进行频域加密，在没有降低权威性、公平性、实用性的前提下，提高了整个方案的安全性，维护了广告商的合法权益。基于该方案构建户外LED广告内容监控管理系统，该系统通过建立数据中心和监控中心，加强对广告公司户外广告播出前期审核管理，播出实际内容的监控管理，监督广告公司户外LED的播放内容只能播出审核过的内容，并对播放电脑和户外监控录像对比记录，防止漏洞。

Based on an indepth study of watermarking and cryptography, a new monitoring and management program is proposed for monitoring the outdoor LED advertisement content. In this program, the watermark of copyright is bind for the advertisement content before frequencydomain encryption. Under the premise of ensuring the authoritativeness, fairness and practicality, the overall system security is improved and the legitimate rights of the advertising company is safeguarded. A content monitoring and management system of the outdoor LED advertisement is constructed based on the program. Through the establishment of a data center and a monitoring center, the system enhances the management of the outdoor advertisement prior to its broadcast, and the management of the actual content of the advertisement. The outdoor LED can only play the audited content, and perform video recording comparisons to prevent vulnerabilities.