中文摘要：

针对中国广播云平台中音频内容无法被直接审计和音频访问者信息无法被获取的问题,设计并实现基于水印的音频审计网关,实现对广播云内音频的流转记录和实时审计。数据包捕获与网络协议解析技术的使用,实现对网络传输信息的获取;水印解析技术的运用,实现对音频的关键内容信息的快速审计;与统一身份认证系统的对接,实现对访问者身份信息的获取,构建出包含访问者、访问行为、访问对象的完整审计链。测试表明,网关的数据包捕获能力能达到1 GB/s,并且基本实现了广播云中音频的实时审计,能够满足广播云环境中音频审计的性能要求。

英文摘要：

Concerning the problem that the content of audio can＇ t be audited directly and the identity information of accessors can＇t be acquired in the Chinese radio cloud, the audio audit gateway based on watermark was designed and implemented, which realizes transfer record and real-time audit on audio in the Chinese radio cloud. By using the packet capture technology and the network protocol parsing technology, the gateway can acquire the network transmission information. By using the watermark extraction technology, the gateway can audit the content of audio quickly. By docking with the unified authentication system, the gateway can acquire the identity information of accessors, eventually building a complete audit chain including accessors, access actions and access objects. Test results show that, the capacity for capturing packets of the gateway can reach to 1 GB/s, and it basically realizes real-time audit on audio in the Chinese radio cloud. The gateway can meet the performance requirements of audio audit in the Chinese radio cloud.