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This paper proposes a new method for digital video watermarking in compressed domain. Both the embedding and extracting phases are performed after entropy decoding. Consequently, fully decompressing the compressed video is not necessary making this scheme an appropriate choice for real-time application. Furthermore, taking the structural information into account leads to presenting a robust watermarking...
Over the years it has been observed that a hacker, finds it less difficult to break any encryption key, even though it may require large number of attempts, specially with advent of high-speed machines. Therefore, an encryption method alone is not sufficient for copyright protection and ownership authentication of stored and streamed videos. Digital watermarking techniques have been proposed for this...
Forensics for digital data has become more and more important, especially for video surveillance systems. Recently, H.264/AVC has been widely applied to video surveillance systems. In this paper, we propose a novel video watermarking scheme in H.264/AVC encoder. It embeds a watermark bit by adaptively varying the number of nonzero quantized AC coefficients in a 4??4 luminance block. The deleted or...
H.264/AVC is a novel video coding standard that provides better coding efficiency than previous video coding standards. It adopts many predictive coding algorithms to improve the coding efficiency of intra and inter frames. Due to its characteristics of high compressibility, it can achieve high quality at low bit rate. Therefore, more and more applications adopt H.264/AVC codec. Nowadays, a great...
In this paper, we present a DCT domain watermarking approach for H.264/AVC video coding standard. This scheme is resilient to compressed-domain temporal adaptation. A cryptographic hash function is used to generate a semi-fragile watermark to provide content-based authentication. The embedded watermark can withstand frame-dropping due to temporal adaptation, yet it is able to detect malicious attacks...
Peer-to-peer content distribution provides high network throughput with relatively low server cost and scales better than traditional content distribution networks with respect to the number of clients. It is ideal for applications requiring large data transfer such as video-on-demand or live video streaming. Traditional forensic watermarking systems are based on the assumption that each user receives...
Digital watermarking is an effective technology for digital products copyright protection and data security maintenance as well as an important branch of information hiding technology. A kind of MPEG-2 video watermarking scheme based on spread spectrum technology is introduced in this paper. First starting with MPEG-2 compressed video standard and then the algorithm principle of video watermarking...
This paper presents a novel information hiding algorithm for AVS (audio video coding standard), taking advantage of the specific features of this self developed Chinese audio video compression standard. AVS adopts Exp-Golomb coding and context based adaptive variable length coding to solve the entropy coding problem, almost all the syntax elements are encoded using Exp-Golomb codes. In the compressed...
Recently, digital watermarking has been one of the most appealing domains in copyright protection because of its residence in the content and negligible visual effects. In this paper, a video watermarking scheme is proposed which embeds copyright information in H.264 bitstream motion vectors. In the proposed method, a watermark string is embedded into the motion vector components with the larger size...
Video authentication techniques generally do not allow any form of manipulation, thus making it impractical for adaptation operations. Moreover, conventional way to adapt and authenticate compressed video content is to perform cascaded decoding and re-encoding operations in some trusted intermediary nodes. In this paper, we propose an authentication scheme for live H.264 encoded video bitstream to...
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