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Video encoding method, video decoding method, video encoding device, video decoding device, and programs for same

一种视频编码、精度的技术，应用在数字视频信号修改、电视、脉冲调制电视信号传输等方向，能够解决计算复杂度高等问题，达到扩充灵活性、预测误差能量降低、编码效率改善的效果

Active Publication Date: 2013-04-24
NIPPON TELEGRAPH & TELEPHONE CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the encoding efficiency is higher than that of the 1-dimensional 6-tap fixed interpolation filter used in H.264 / AVC, the computational complexity in obtaining the filter coefficients is very high, so it is introduced in Non-Patent Document 5 Proposals for reducing this computational complexity

Method used

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  • Video encoding method, video decoding method, video encoding device, video decoding device, and programs for same
  • Video encoding method, video decoding method, video encoding device, video decoding device, and programs for same
  • Video encoding method, video decoding method, video encoding device, video decoding device, and programs for same

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example 2

[0141] Following Fig. 10 to Fig. 12B, the area number assignment processing in the second example will be described in detail. FIG. 10 is a detailed flowchart of step S404 (area code allocation process) explained in FIG. 8 .

[0142] In step S501, the edge angle E and the edge strength Z are input, and the area number table is queried. In step S502, the area number is determined from the query result of the area number table.

[0143] FIG. 11B shows an example of an area number table when the number of areas is three. In this example, as shown in FIG. 11A, area numbers are assigned as follows: "Area 1" if the edge is strong and horizontal, "Area 2" if the edge is strong and vertical, and "Area 3" if the edge is weak.

[0144] Let the edge intensity threshold be Z t . Threshold Z t Can be set arbitrarily. As shown in Figure 11B, the following definition information is stored in the area number table: -1≤E≤1 and Z t When t When t When the area number is 3 (area 3). For e...

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Abstract

The present invention enables residual energy from motion compensating inter-screen prediction to be reduced and encoding efficiency to be improved, by the use a region division-type adaptive interpolation filter that takes into consideration edge characteristics of an image. An edge calculation unit calculates edge information from reference image data that indicates motion vectors. Based on the edge information, a region division unit adaptively divides frames to be encoded into a plurality of regions which become units to which an interpolation filter is applied. A filter coefficient optimizing unit optimizes an interpolation filter with decimal-accuracy pixels, in region units. A reference image interpolation unit interpolates decimal-accuracy pixels for a reference image, using the optimized interpolation filter, and a prediction encoding unit performs prediction encoding based on motion prediction with decimal accuracy.

Description

technical field [0001] The present invention relates to a video encoding and decoding technique for improving the performance of an adaptive interpolation filter (adaptive interpolation filter) in video encoding using motion compensation. [0002] this application claims priority based on Japanese Patent Application No. 2010-180813 for which it applied to Japan on August 12, 2010, and uses the content here. Background technique [0003] In video coding, in inter-picture prediction (motion compensation) coding in which prediction is performed between different pictures, motion vectors can be found to minimize prediction error energy etc. by referring to already decoded frames, and their residual signals are orthogonally transformed, and the It is quantized and entropy encoded to become binary data. In order to improve coding efficiency, a prediction method with higher prediction accuracy is required, and it is essential to reduce prediction error energy. [0004] In the vid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/32H04N19/50H04N19/117H04N19/136H04N19/137H04N19/14H04N19/147H04N19/176H04N19/186H04N19/46H04N19/463H04N19/503H04N19/51H04N19/517H04N19/523H04N19/553H04N19/59H04N19/60H04N19/61H04N19/70H04N19/80H04N19/91
CPCH04N7/26058H04N19/00757H04N19/00151H04N19/00157H04N19/00066H04N19/00266H04N19/00739H04N7/32H04N7/26127H04N7/26271H04N19/00569H04N7/26138H04N19/117H04N19/14H04N19/523H04N19/59H04N19/176H04N19/119H04N19/51H04N19/50
Inventor 松尾翔平坂东幸浩高村诚之如泽裕尚
Owner NIPPON TELEGRAPH & TELEPHONE CORP
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