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Video Error Concealment Method Based on Compressed Sensing and Information Hiding

A compressed sensing and error concealment technology, applied in digital video signal modification, image communication, electrical components, etc., can solve problems such as large difference in motion area, enlargement of error in motion area, distortion at the receiving end, etc., and achieve the effect of small embedded data volume.

Active Publication Date: 2019-09-06
SOUTHWEST JIAOTONG UNIV
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  • Claims
  • Application Information

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Problems solved by technology

However, for fast-moving videos, the difference between the motion areas of different frames may be relatively large, and the sharing of the ROI area increases the error of the motion area, which may mistake the motion pixels as background pixels, resulting in distortion at the receiving end.

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  • Video Error Concealment Method Based on Compressed Sensing and Information Hiding
  • Video Error Concealment Method Based on Compressed Sensing and Information Hiding
  • Video Error Concealment Method Based on Compressed Sensing and Information Hiding

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Embodiment Construction

[0018] The technical solution of the present invention will be further described below in conjunction with the accompanying drawings.

[0019] 1. The main steps of generating and embedding video frame features based on compressed sensing:

[0020] (1) Frame grouping of video signals. The original video frame f of N frames i , i=1, 2,..., N is divided into m frame groups, each group has n frames, and each frame in the i-th frame group is recorded as f ij , j=1, 2,...n where f i1 for the background frame.

[0021] (2) Calculate the feature information of each non-background frame. The motion residual for each non-background frame is calculated according to the following formula,

[0022] R ij =f ij -f i1 , j=2,3,...,n

[0023] In order to reduce the amount of data, the motion residual is down-sampled by 1 / 2 to obtain the original 1 / 4 motion residual R ij ’, and use the linear random compression method in compressed sensing to obtain the feature information of the corre...

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Abstract

The invention discloses a video error concealment method based on compressed sensing and information hiding. Based on the video frame feature generation based on compressed sensing, a video signal error is canceled at a receiving end to effectively ensure the image quality of the video contents, and the embedding volume and the reconstruction error limit are both considered. According to the video error concealment method, the interframe dependency in compressed video signals and the high compressibility and high reconstruction performance of compressed sensing are fully used to achieve the error concealment of a damaged video, and the errors caused by other reasons can also be canceled. Compared with the existing video error concealment method based on information hiding, the video error concealment method has the advantages of not only ensuring a relatively smaller embedding data size, but also ensuring to use limited data to reconstruct the original movement residual at relatively higher accuracy, the algorithm is easy to implement, the transmission transparency is good, and the cancellation performance is relatively good.

Description

technical field [0001] The invention relates to a video error concealment algorithm based on compressed sensing and information hiding, which is a method especially suitable for covering errors caused by lossy channels at the receiving end, that is, under the condition of lossy transmission, it can effectively protect video The visual quality of the content. Background technique [0002] In recent years, due to the rapid development of the Internet, the maturity of video technology, and the emergence of various powerful video processing software, digital video has become more and more widely used. However, for transmission channels, especially wireless channels, the channel state changes randomly, and lossless transmission of signals cannot be guaranteed. Video signal is a visual signal presentation method, which requires high image quality. Therefore, concealing the video signal error at the receiving end is an effective technical means to restore the visual picture. [...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N19/137H04N19/172H04N19/467H04N19/66H04N19/895
Inventor 王宏霞陈延利
Owner SOUTHWEST JIAOTONG UNIV