船舶黑匣子中对音视频信号压缩存储处理研究

Research on AV signal compression and storage approaches in black box of shipment

黑匣子被广泛应用于记录和保存航海航空过程中状态信息,它可以为航海事故调查提供客观有效的数据,并且在事故未发生时为船舶隐患检测提供重要的依据。为了保证可以有足够的信息用于事故的准确预测以及为事故发生后的事故责任认定提供足够多的数据,多种音视频压缩技术被应用于黑匣子。本文在构建完整黑匣子软硬件基础的前提下,重点对音视频编解码的压缩算法进行研究,采用混合编码的方法实现了高度的压缩比,实现了VAD算法。在不影响质量的前提下,极大地提高了音频的压缩比。

The black box has been widely applied on recording and storing the state information and navigation and aviation. It can not only provide objective and effective information for navigation disasters,but can also provide importance reliance on hidden danger detection before the disasters. In order to make sure that the black box could provide enough information,this paper emphasize on research on AV signal compression algorithm on the premise of building complete system of software and hardware,and it uses the hybrid encoding to realize high compression ratio. It realizes VAD algorithm and highly improve compression ratio without harming the quality.