A Video Error Tolerant Coding Method Based on Reversible Information Hiding and Redundancy Technology

Abstract

A video fault tolerance coding method based on reversible information hiding and a redundancy technology is disclosed. The method comprises two steps: coding terminal information embedding and decoding terminal information extraction. The step of the coding terminal information embedding is characterized in that: redundant slice is adaptively added to odd numbered frame of a video sequence and the RS is not added to even numbered frame; a motion vector of the even numbered frame in a key area is extracted and converted into a bit sequence; a scheme for easily expanding bilateral reversible information hiding is provided, a motion vector distribution function in the RS is calculated and information of the even numbered frame is embedded in the motion vector of the RS in a previous frame. The step of the decoding terminal information extraction is characterized by: extracting the embedded information according to an extraction algorithm of the decoding terminal and a distribution function characteristic of the RS motion vector and converting into the motion vector which can be used by error concealment; according to a network state, if a packet loss phenomenon happens to the odd numbered frame, starting using the RS; if motion vector loss happens to the even numbered frame, using the extracted motion vector information to carry out error concealment. In the invention, the video fault tolerance coding solution scheme with a gradable character, a large capacity and a low bit rate expansion is provided.

Description

technical field [0001] The invention relates to video coding, multimedia communication and information hiding, in particular to a video error-tolerant coding method based on reversible information hiding and redundancy technology. Background technique [0002] A significant advantage of video coding is that very high compression ratios can be obtained. However, transmission errors exist in many communication systems. Due to the use of predictive coding, transmission errors not only affect the decoding quality of the current frame, but also propagate to subsequent predictively coded frames. If the error propagation between frames is not controlled, the image quality will seriously degrade or even completely collapse. [0003] The video error-tolerant coding methods commonly used in H.264 are as follows: 1) Intra-frame update: inserting intra-frame prediction images in the video sequence can reduce the error propagation between frames, but intra-frame coding often requires m...

AI Technical Summary

Problems solved by technology

This comes at the cost of distorting the visual quality of the video

Moreover, it may cause partial decoding errors and out-of-synchronization, and out-of-synchronization may cause large continuous errors, especially need to be properly handled

This type of algorithm is mainly to modify the DCT (Discrete cosine transform) quantization coefficient, its calculation is complex, and the amount of information embedded in this type of method is restricted, so the amount of information that can be protected is also limited

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