Abstract
Data hiding is a technique that allows secret data to be delivered securely by embedding the data into cover digital media. In this paper, we propose a new data hiding algorithm for H.264/advanced video coding (AVC) of video sequences with high embedding capacity. In the proposed scheme, to embed secret data into the quantized discrete cosine transform (QDCT) coefficients of I frames without any intraframe distortion drift, some embeddable coefficient pairs are selected in each block, and they are divided into two different groups, i.e., the embedding group and the averting group. The embedding group is used to carry the secret data, and the averting group is used to prevent distortion drift in the adjacent blocks. The experimental results show that the proposed scheme can avoid intraframe distortion drift and guarantee low distortion of video sequences. In addition, the proposed scheme provides enhanced embedding capacity compared to previous schemes. Moreover, the embedded secret data can be extracted completely without the requirement of the original secret data.
Highlights
With the rapid development of multimedia and network technology, a huge amount of digital media, i.e., images, video, audio, and texts, is transmitted each second in the public network, such as the Internet
Embedding the watermark in the discrete cosine transform (DCT) coefficients of the I-frames in these previous schemes result in stego videos that have low visual quality, which is caused by the distortion drift in the I-frame prediction
In 2010, Ma et al [17] proposed a new algorithm for data hiding in H.264/advanced video coding (AVC) based on DCT coefficients
Summary
With the rapid development of multimedia and network technology, a huge amount of digital media, i.e., images, video, audio, and texts, is transmitted each second in the public network, such as the Internet. Embedding the watermark in the discrete cosine transform (DCT) coefficients of the I-frames in these previous schemes result in stego videos that have low visual quality, which is caused by the distortion drift in the I-frame prediction. To overcome this shortcoming, in 2010, Ma et al [17] proposed a new algorithm for data hiding in H.264/AVC based on DCT coefficients. In 2010, Ma et al [17] proposed a new algorithm for data hiding in H.264/AVC based on DCT coefficients Their scheme used several pairedcoefficients of a 4 × 4 macroblock to embed the secret data to avoid distortion drift.
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