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Journal of Engineering and Applied Sciences
Year: 2019  |  Volume: 14  |  Issue: 11  |  Page No.: 3690 - 3697

Improved Joint Selective Encryption and Matrix Embedding Technique using Adaptive Block Size Coding in HEVC Standard

P. Saravanan and K.K. Thyagharajan    

Abstract: Today, High Efficiency Video Coding (HEVC), developed by the ITU-T video coding experts group and ISO/IEC moving picture experts group is emerging as a potential video compression standard. HEVC or H.265 compared to H.264/AVC is primarily standardized to improve the compression ratio, so as to achieve an equivalent video quality. In HEVC, a joint selective encryption and data embedding technique is proposed where HEVC coding structure is separated into two groups. One is utilized for encrypting video content and the other for embedding data. However, the size of bit-streams for encrypted and data-embedded videos are increased significantly, since, the HEVC coding structure is not utilized. Therefore, in this study we have proposed an improved joint selective encryption and matrix embedding technique using block size coding decision model in H.265. In this approach, non-zero DCT coefficients are manipulated according to the transform block size in all frames. Here, matrix embedding is proposed in terms of large payloads for improving embedding efficiency and reducing coding complexity. The results obtained show that the proposed data hiding technique for H.265 provided highest embedding efficiency with reduced coding complexity.

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