文件名称：A DWT-Based Video Watermarking Algorithm
文件大小：126KB
文件格式：PDF
更新时间：2012-06-24 03:06:37
dwt videowatermark
In this paper, we propose a DWT-based video watermarking algorithm applying DS-CDMA (Direct Sequence Code Division Multiple Access). We use improved Gold sequences to encode the watermark. The CDMA encoded watermark is embedded into the lowest frequency coefficients of DWT transformed video frames. Blind recovery of the embeddedwatermark is achieved by analyzingthe DWT coefficients of the watermarked video frames and the auto-correlation of orthogonal codes. The experimental results demonstrate that the proposed algorithm can produce watermarked contents in good visual quality and is robust to typical video operations such as MPEG-2 compression, Gaussian noise, cropping and frame dropping.