Method and device of multiple description video coding based on relevance optimization rule
A video coding and correlation technology, applied in the field of video coding, can solve problems such as increasing computational complexity, difficulties, and affecting practicability
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Embodiment 1
[0048] Example 1 figure 1 It is a system block diagram of the multi-description video coding method based on the correlation optimization criterion designed according to the present invention. Using a preprocessing procedure to prevent severe motion can lead to severe degradation of the quality of single-channel reconstructions. figure 2 The impact of preprocessing on the quality of single-channel reconstruction is shown. For 3 consecutive frames, k-1, k and k+1, the black circle represents a moving object, and the motion of the object can be seen in the above 3 frames The phenomenon of inhomogeneity occurs, so when we decode in a single pass, if k-1 and k+1 frames are used to reconstruct frame k, there will be obvious distortion. At this time, if the preprocessing method is used to interpolate one frame between frames k and k+1, and reconstruct frame k with k-1 and the interpolated frame during single-channel decoding, a higher quality reconstruction can be obtained image....
Embodiment 2
[0067] Example 2: Figure 7 Shown is a flowchart of the preprocessing process. What needs to be noted here is that we only have the difference between ‖MV‖ not less than the threshold T, that is, |‖MV‖ (k-1,k) -‖MV‖ (k,k+1) In the case of |≥T, the optimal selection of the mode is carried out. And mode 0 also needs to be considered in the selection process, that is, the situation of not adding redundant frames. The reason is that in mode 0, although the temporal correlation of the video subsequence may be reduced, it may have better compression performance because no redundant information is added.
[0068] When making mode selection, we will first base on Figure 8 Perform single-path reconstruction, and then calculate the values of formula (1) in the eight modes according to the calculation method in Table 1, so that the optimal mode of formula (1) is the optimization mode we choose.
[0069] Table 1 Mode Selection ρ intra and ρ inter calculation
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