H.264/AVC Data Hiding Based on Intra Prediction Modes for Real-time Applications
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Date
2012-10-24
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Abstract
The existing data hiding methods for the newest
video codec H.264/AVC exploit its several modules such as the
discrete cosine transform coefficients or the prediction modes.
In this paper, a new data hiding approach is presented by
exploiting the intra prediction modes for the 4x4 luminance
blocks. The objective is to ensure a relatively high embedding
capacity and to preserve the encoding and the decoding times
in order to satisfy real-time applications. The intra prediction
modes are divided into four groups composed of modes of close
prediction directions. The data embedding is based on
modifying modes of the same group in order to maintain visual
quality and limit the number of additional calculation
procedures. The increase of embedding capacity relies on the
group composed on four modes since it allows the embedding
of two bits per mode.
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Keywords
Data hiding, H.264/AVC, intra prediction, real time applications, authentication