摘要
该文针对多媒体课件中视频流和屏幕流的特点,分析了目前对视频流采用数字水印技术实现版权保护和防攻击时存在的一些问题,提出了采用基于DCT域的视频水印算法和基于BCH编码方案的数字水印算法,不仅能有效地保护多媒体课件作者的版权,还能抵抗一些常用攻击以达到防止被篡改的目的。
Specifically for the characteristic that the video frequency stream and the screen stream in multi-media class, have analysed a few problems adopt the figure watermark technology to realize copyright protection composing in reply existence when guarding against attack at present to video frequency stream , have brought forward the figure watermark algorithm adopting owing to DCT region video frequency watermark algorithm and BCH code scheme-based, not only being able to protect copyright of multi-media class author , but also can fight against a little attack in common use effectively to achieve prevent from being tampered with purpose.
出处
《计算机安全》
2007年第10期22-26,共5页
Network & Computer Security
关键词
视频水印
版权保护
DCT域
BCH编码
video frequency watermark
copyright protects
DCT region
BCH code
