Data hiding-based H.264 video transmission error code recovery method

Abstract

The invention provides a data hiding-based H.264 video transmission frame I error code recovery method by aiming at how to improve H.264 video transmission error code recovery effect and improve the quality of wireless video transmission. The method comprises the following steps of: 1) side information of video frames is extracted in a self-adaptive way at a coding end by using the data hiding-based method and scene switching information and is hidden in a video streaming group, so that the side information can be extracted at the coding end, the video transmission error code recovery can be realized by using the self-adaptive algorithm, the quality of the H.264 video transmission in various packet loss environments is improved, and especially, the method has a better error code recovery effect on scene switching and large movement pictures; and 2) data hiding is realized by using an extended field of a real time protocol (RTP ) message header, so that the problem of insufficient important data hiding spaces for video frames is better solved, the original video coding data is not damaged, and the quality of the video reconstruction is improved.

Description

technical field [0001] The invention belongs to the field of wireless video communication, in particular to a data hiding-based H.264 video transmission error recovery method in wireless video communication. Background technique [0002] The transmission channels of wireless communication networks and the Internet are not reliable. During the transmission of video bit streams, problems such as channel interference and network congestion will lead to random bit errors, burst errors, and packet loss errors. video data information is lost. Due to the motion compensation mechanism of the H.264 standard for low-bit-rate video communication applications, bit errors in predictive coding will spread in time and space, and any errors in the current frame will affect subsequent frames that refer to it; The bit error in the long coding sequence will spread the space and affect a large area in the GOB until the next synchronization point; this series of standards adopts entropy coding ...

AI Technical Summary

Problems solved by technology

[0004] The video transmission error recovery method based on data hiding mainly involves four issues: how to extract important data, how to choose a hiding place, how to hide, and how to use important data for error recovery

[0005] The disadvantages of existing methods mainly include: 1) This type of method does not distinguish the type of I frame, and extracts the same frame for all I frames.

[0006] type of important data, and only a single error recovery algorithm is used for error recovery, resulting in poor error recovery effect

2) Hiding the important data of a certain piece to the next piece is very easy to cause the loss of original data and hidden data at the same time

3) Data hiding using the parity data embedding method will damage the original coded data of the I frame, especially when the amount of hidden data is large, the damaged original coded data will be more

4) In many scenes, there are few non-zero quantized DCT coefficients, and when the amount of hidden data is large, important data cannot be hidden

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