In this paper

a new watermarking technique based on chaos and video contents is proposed and implemented. A chaotic sequence which is generated by a secret key as seed is automatically transformed to two value image

and eventually converted to gray image. Selected parts of the gray image are embedded in the corresponding parts of a video frame. The selection of parts is based on the histogram of the video frame so as to embed watermark into smooth parts of the video frame. This algorithm can resist some attacks such as averaging filtering

loss compression.