Video encoding/decoding method and system capable of recovering noise
A technology of video coding and decoding, video coding, applied in the direction of digital video signal modification, electrical components, image communication, etc., to achieve the effect of easy integration and small additional burden
Active Publication Date: 2014-08-27
THE HONG KONG UNIV OF SCI & TECH
View PDF4 Cites 2 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0011] In order to solve the above problems, the present invention provides a video coding method and system for recovering noise, so as to restore real noise while introducing as little extra burden as possible to the standard video coding system
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
[0024] Hereinafter, the present invention will be further described with reference to the drawings and embodiments.
[0025] Before describing the method and system of the present invention in detail, a brief description of the mathematical model involved in the present invention is given first.
[0026] In the present invention, it is assumed that the noise component in the video sequence is additive Gaussian noise, and the observed noisy video current frame and its reference frame are respectively represented as Y k and Y k-1 , and their corresponding real video signals are denoted as X k and x k-1 , then the following equation holds:
[0027] Y k =X k +N k (1)
[0028] Y k-1 =X k-1 +N k-1 (2)
[0029] Among them, N k and N k-1 denote the noise components in the kth frame and the k-1th frame, respectively. Suppose N k The mean and variance of are 0 and σ respectively k 2 .
[0030] In addition, since the true value of the video signa...
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 present invention provides a video encoding / decoding method capable of recovering noise, including a video encoding method of removing noise on encoding terminal; and a video decoding method of recovering noise on decoding terminal. In a noise removing process, performing zoom and translation to a noise-containing residual signal or its conversion coefficient so as to obtain a residual signal between an optimal estimation signal of a true video signal of the present frame and its referrence frame, then performing transformation, quantification and entropy encode to the residual signal to form a compression code stream to output. In a noise recovering process, performing inverse zoom and translation to the reconstructed residual signal to obtain a recovered noise-containing residual signal, and then adding the noise-containing residual signal with the referrence frame of the present frame to obtain a video signal that noise is recovered. Accordingly, the invention provides a video encoding / decoding system capable of recovering noise. According to the invention, the primal true noise may be recovered with less added burden, and the noise-removing treatment and noise-recovering treatment may be easily integrated to a standard video encoding / decoding system.
Description
technical field [0001] The present invention relates to the technical field of video coding, in particular to a video coding and decoding method and system for restoring noise. Background technique [0002] At present, video technology is widely used in fields such as video telephony, video conferencing, video chat, visual e-commerce, digital TV, and digital film. In these fields, the subjective quality of digital video sequences often directly affects the sensory experience of users / viewers, and noise is an important factor affecting subjective video quality. [0003] Specifically, digital video sequences are usually polluted by noise in the process of acquisition, recording, processing and transmission, and these noises often lead to a reduction in the accuracy and coding efficiency of motion estimation in video coding. Therefore, denoising techniques are usually considered to remove noise components in video sequences. However, in most cases, the denoising operation als...
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): H04N19/61H04N19/124H04N19/117H04N19/88H04N19/60
Inventor 区子廉代晶静庞超
Owner THE HONG KONG UNIV OF SCI & TECH