The present invention provides a method for audio and video multi-level encryption and decryption method, monitoring device and system, analog audio data in the sending terminal access and / or video data to digital conversion; digital audio basic code stream through the conversion form of the compressed video stream and / or base separately after conversion level encryption; an encrypted stream based audio and / or video stream based transmission stream; two level encryption for the transmission stream. Correspondingly, multilevel decryption is performed at the receiver. Through the technical scheme, the security of data transmission is effectively ensured.
【技术实现步骤摘要】
【技术保护点】
一种用于监控的音视频多级加密方法,其特征在于,该方法包括以下步骤: 将获取的模拟音频数据和/或视频数据进行数字化转换; 对压缩的经过数字化转换形成的音频基础码流和/或视频基础码流分别进行一级加密; 将经过一级加密的音频基础 码流和/或视频基础码流转换为传输码流; 对所述传输码流进行二级加密。
【技术特征摘要】
【专利技术属性】
技术研发人员:陈羚,
申请(专利权)人:北京中星微电子有限公司,
类型:发明
国别省市:11[中国|北京]
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