Research Article

A Novel Steganography Technique for SDTV-H.264/AVC Encoded Video

Table 1

Comparative table of the technique proposed and [10].

TechniqueHiding componentApplied toSecurityComputational complexityMaximum embedding bits/MacroblockPerceptual awarenessKey feature

Reference [10]CAVLC code wordIntrapredicted I-frames (luminance samples)Key-dependent strategy based on a public key extracted from the local macroblock features and a private key owned at the target destinationLowOneNo: the algorithm can change low and high frequency residual ICT quantized coefficientsHidden data randomness due to a key and local macroblock derivatives dependent algorithm

ProposedCAVLC code wordIntrapredicted I-frames (luminance samples)The secret message is ciphered using a private key [16] prior to the embedding process and divided into byte unitsLower (security does not rely on the local macroblock features, which demands higher computational resources)FourYes: the algorithm is designed to change only high frequency residual ICT quantized coefficients and in an interlaced way, in order to try to avoid perceptual degradation and error propagation.Deep understanding of the coding properties of the CAVLC entropy encoder for bit rate control and rapid embedding algorithm purposes