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A novel slice-layer double-step rate control (SLDSRC) scheme for H.264 is proposed. It not only resolves the problem of inter-dependency between rate-distortion (R-D) optimization (RDO) and rate control (RC), but also improves control accuracy by introducing double-step mechanism, new source rate prediction model, header-bit prediction method. The new rate-quantization (R-Q) model distributes bit...
This paper presents a novel blind video watermarking method based on image complexion analysis. The image complexion information is extracted from the DC coefficient in sub blocks transformed by discrete cosine transform (DCT) to make sure the macroblock of image adapt to be embedded watermark information. Subsequently, the algorithm presents DCT coefficients space layered mode (DCSLM), and embeds...
Aiming at the need of personal privacy protection in the image acquisition system, paper proposes a video security algorithm used in facial protection. It fixes on the facial area in the image by face detection algorithm, regards facial area image as characteristic watermark information (large capacity watermark) and embeds them into the original image using large capacity color image watermarking...
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