A New Technique of Anti-tampering Technology Based on AVS Video

Based on China AVS standard, this paper proposed a method of built-in video watermark technology. Authentication information was generated from I frame as the watermark, and is embedded into selected positions of later P-, B-frames. An algorithm was designed and introduced in this paper to verify the video modification status via abstracted watermark. Dependent on feature of credible encoding/decoding of AVS video, besides appropriate watermark robustness could be guaranteed, this method can minimize the watermark capacity and can reduce the impact on video, as well as detection sensitivity for video tampering of watermark algorithm could be guaranteed. The test results show that the technology proposed by this paper has almost zero effect on vision and encoding efficiency, while also can detect the position of the tampering precisely.