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Video encoding method and device, video decoding method and device, and program therefor

A video decoding and video encoding technology, applied in the field of video decoding programs, can solve the problem of large influence of sampling accuracy and so on

Inactive Publication Date: 2015-05-06
NIPPON TELEGRAPH & TELEPHONE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] However, there is a problem that the quality of an area where the variance of the prediction residual is large, such as a dynamic area, is greatly affected by the upsampling accuracy of the prediction residual.

Method used

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  • Video encoding method and device, video decoding method and device, and program therefor
  • Video encoding method and device, video decoding method and device, and program therefor
  • Video encoding method and device, video decoding method and device, and program therefor

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no. 1 approach

[0095] Hereinafter, a video encoding device and a video decoding device according to a first embodiment of the present invention will be described with reference to the drawings.

[0096] First, a video encoding device will be described. figure 1 It is a block diagram showing the structure of the video encoding device of this embodiment.

[0097] Such as figure 1 As shown, the video encoding device 100 includes: an encoding target video input unit 101; an input frame memory 102; a prediction unit 103; a subtraction unit 104; a residual downsampling unit 105; a transformation and quantization unit 106; Temporary decoding unit 108 ; refresh unit 109 ; loop filter unit 110 ; reference frame memory 111 and entropy encoding unit 112 .

[0098] The encoding target video input unit 101 inputs an encoding target video to the video encoding device 100 . Hereinafter, the video to be coded is referred to as the video to be coded, and in particular, the frame to be processed is calle...

no. 2 approach

[0198] Next, a video encoding device and a video decoding device according to a second embodiment of the present invention will be described. Figure 5 It is a block diagram showing the configuration of a video encoding device 100a according to the second embodiment of the present invention. In this figure, for the figure 1 The same parts of the shown devices are given the same reference numerals, and description thereof will be omitted.

[0199] The device shown in the figure is figure 1 The devices shown differ in that, as Figure 5 As shown, an auxiliary video input unit 113 and an auxiliary frame memory 114 are newly provided.

[0200] The auxiliary video input unit 113 inputs, to the video encoding device 100a, a reference video for refreshment of the decoded image. Hereinafter, this video for reference is referred to as an auxiliary video, and in particular, a frame used for processing is referred to as an auxiliary frame or an auxiliary image.

[0201] The auxili...

no. 3 approach

[0256] Next, a video encoding device and a video decoding device according to a third embodiment of the present invention will be described. Figure 9 It is a block diagram showing the configuration of a video encoding device 100b according to the third embodiment of the present invention. In this figure, for the Figure 5 The same parts of the shown devices are given the same reference numerals, and description thereof will be omitted.

[0257] The device shown in the figure is Figure 5 The devices shown differ in that, as Figure 9 As shown, an auxiliary video prediction image and a residual generation unit 115 are newly provided.

[0258] The auxiliary video predicted image and residual generation unit 115 generates a predicted image and residual of the auxiliary video used as a reference for refreshment of the decoded image. Hereinafter, the predicted image and residual of the reference auxiliary video are referred to as an auxiliary predicted image and an auxiliary p...

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Abstract

In an instance in which, when encoded data for video is decoded, the frames constituting the video are divided into a plurality of regions and predictive decoding is performed for each of the regions, a provisional decoded image in which an image is provisionally decoded from a low-resolution prediction residual is generated, and the decoding value is renewed, whereby a final decoded image is generated. In addition, in an instance in which, when the frames constituting the video are divided into a plurality of regions and predictive encoding is performed for each of the regions, a high-resolution prediction residual is down-sampled and a low-resolution prediction residual is generated, a subsampling prediction residual is generated by a subsampling process in which only some of the pixels of the high-resolution prediction residual are sampled, and the result is used as the low-resolution prediction residual.

Description

technical field [0001] The present invention relates to a video encoding method, a video decoding method, a video encoding device, a video decoding device, a video encoding program, and a video decoding program. [0002] This application claims priority based on Japanese Patent Application No. 2012-211156 for which it applied on September 25, 2012, and uses the content here. Background technique [0003] In general video coding, each frame of the video is divided into blocks as processing units by using the spatial / temporal continuity of the subject, and the video signal is predicted spatially / temporally for each block, Encoding the prediction information indicating the prediction method and the prediction residual can greatly improve the encoding efficiency compared to encoding the video signal itself. [0004] RRU (Reduced Resolution Update, reduced resolution refresh) is a technique to further improve the coding efficiency by reducing the resolution of at least a part of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N19/50H04N13/00
CPCH04N19/80H04N19/33H04N19/59H04N19/597H04N13/161H04N19/503H04N19/105H04N19/117H04N19/167H04N19/182H04N19/82G06T2207/10016
Inventor 杉本志织志水信哉木全英明小岛明
Owner NIPPON TELEGRAPH & TELEPHONE CORP
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