Video Steganography Method Based on Intra Predictive Coding

Abstract

The invention provides a video steganography method based on intra-frame prediction coding. By constructing a n appropriate distortion function and performing actual embedding by using STC, it can beensured that the distortion caused by modifying the prediction mode is close to minimum. When a sender embeds a message, the message is embedded starting from the first key frame I1, an optimal groupset (the formula is described in the specification) is obtained according to a mapping rule, the optimal group set (the formula is described in the specification), a secret message sequence m1,1 and an embedding disturbance set are sent to a first layer embedder to obtain a secret set (the formula is described in the specification), the secret set (the formula is described in the specification), asecret message sequence m1,2 and the embedding disturbance set are sent to a second layer embedder to obtain a secret set (the formula is described in the specification), and the final prediction mode is selected to generate a video code; a secrete containing encoded video is generated at last; when a receiver extracts the message, the key frame subjected to the intra-frame prediction coding isobtained from the secrete containing encoded video; the message is extracted from the first key frame, and the prediction mode is obtained by using a decoder; and the secret set is obtained accordingto the mapping rule, and the secrete message is extracted.

Description

technical field [0001] The invention belongs to video information hiding technology, in particular to a video steganography method based on intra-frame prediction coding. Background technique [0002] Steganography is an important means to ensure the privacy of message transmission. Although message encryption can ensure the privacy of messages, the behavior of message transmission will be known to attackers, and the encrypted ciphertext in the form of garbled characters will also arouse the interest of attackers; in contrast, steganography can ensure message transmission The behavior is invisible, and the attacker cannot tell whether it is an ordinary transmission or a secret transmission, so steganography is an important supplement to encryption technology. Steganography can be applied in various high-security message transmission fields, effectively preventing attackers from attacking. [0003] Video steganography technology can modify different coding links such as mot...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems existing in the existing video steganography technology, the present invention provides a video steganography method based on intra-frame predictive coding. After constructing a suitable distortion function, the method uses adaptive steganographic coding technology (STC) to actually embed , which ensures that the distortion caused by modifying the prediction mode is close to the minimum

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