Sparse representation based method and device for concealing video errors
An error concealment and sparse representation technology, applied in the field of image processing, can solve problems such as poor image quality, poor use of spatial texture information, unsuitable continuous information packets, etc., to achieve excellent performance, excellent error concealment performance, and solve The effect of a significant drop in video quality
Active Publication Date: 2011-11-30
TSINGHUA UNIV
View PDF0 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Although the first type of thinking takes advantage of the correlation in the time domain of the video frame, it does not make good use of the spatial texture information of the damaged area.
The second type of thinking is often not applicable to the situation of continuous packet loss
Because a large number of macroblocks located around the damaged area are lost, it means that the information that can be provided to the spatial masking strategy is quite limited, so the quality of the reconstructed image will be poor
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0013] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.
[0014] Such as figure 1 As shown in FIG. 2 , it is a flow chart of a sparse representation-based video error concealment method according to an embodiment of the present invention. Such as figure 2 As shown, it is a schematic diagram of constructing a motion-compensated residual image according to an embodiment of the present invention, wherein, F c is the current frame, F r for F c corresponding frame of reference. Assume and are the current frame F c and the reference frame F r Middle pixel position The pixel value at i...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention provides a sparse representation based method for concealing video errors. The method comprises the following steps: detecting and acquiring broken pixel regions and complete pixel regions in a current frame; acquiring the motion vector of the pixels in the complete pixel regions in the current frame relatively to a reference frame; performing macro block matching on the current frame and the reference frame according to the motion vector to generate a residual image of the complete pixel region after motion compensation; constructing an image sparsity target function according to the residual image; and solving the image sparsity target function, and filling the broken pixel regions according to the solving result. The method reconstructs the image region occurring errors by directly utilizing the image sparse representation, and has the advantages of simple and easy use and excellent performance.
Description
technical field [0001] The invention relates to the technical field of image processing, in particular to a video error concealment method and device based on sparse representation. Background technique [0002] As the killer application of the Internet and the third generation mobile (3G) network, real-time video communication service has become the focus of common attention of operators, equipment manufacturers and service providers. Its core lies in how to provide users with high-quality video transmission quality. However, the underlying bearer network is time-varying, which brings great uncertainty to the efficient transmission of video streams. In particular, sudden network congestion or channel fading will lead to decoding errors of the video stream at the receiving end, which will further lead to severe distortion of the reconstructed image. In order to cover up the visual distortion of such video images, error concealment algorithms emerged as the times require, a...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): H04N7/68H04N7/26H04N7/30H04N19/895H04N19/65
Inventor 戴琼海肖红江
Owner TSINGHUA UNIV