Today, eavesdropping is becoming a common issue in the rapidly growing digital network and has foreseen the need for secret\ncommunication channels embedded in digital media. In this paper, a novel steganography technique designed for Standard\nDefinition Digital Television (SDTV) H.264/AVC encoded video sequences is presented. The algorithm introduced here makes\nuse of the compression properties of the Context Adaptive Variable Length Coding (CAVLC) entropy encoder to achieve a low\ncomplexity and real-time inserting method. The chosen scheme hides the private message directly in the H.264/AVC bit stream\nby modifying the AC frequency quantized residual luminance coefficients of intrapredicted I-frames. In order to avoid error\npropagation in adjacent blocks, an interlaced embedding strategy is applied. Likewise, the steganography technique proposed allows\nself-detection of the hidden message at the target destination.The code source was implemented by mixing MATLAB 2010 b and\nJava development environments. Finally, experimental results have been assessed through objective and subjective quality measures\nand reveal that less visible artifacts are produced with the technique proposed by reaching PSNR values above 40.0 dB and an\nembedding bit rate average per secret communication channel of 425 bits/sec. This exemplifies that steganography is affordable in\ndigital television.
Loading....