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Image processing method and image processing device

An image processing and image block technology, which is applied in image communication, digital video signal modification, electrical components, etc., can solve problems such as block noise reduction, and achieve the effect of improving adaptability

Active Publication Date: 2014-03-05
SUN PATENT TRUST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] In the prior art described above, in the filtering process using the deblocking filter, block noise is reduced

Method used

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  • Image processing method and image processing device
  • Image processing method and image processing device
  • Image processing method and image processing device

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Experimental program
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Embodiment approach 1

[0195] use Figure 1 ~ Figure 3B , Figure 7A ˜ FIG. 9 describe the image processing method and the image processing apparatus according to Embodiment 1. FIG. In addition, in this embodiment, the image processing method and the image processing device will be described by taking the case where they are applied to the video encoding method and the video encoding device as an example.

[0196] In addition, the structure of the video encoding device according to the present embodiment is the same as figure 1 The video encoding device of the comparative example shown is the same. The video coding device of this embodiment differs from the video coding device 100 of the comparative example in the configuration of the deblocking filter processing unit 150 .

[0197] In this embodiment, the deblocking filter processing unit 150 includes a plurality of deblocking filters having different strengths, and a filter control unit that controls the plurality of deblocking filters.

[019...

Embodiment approach 2

[0336] based on Figure 19 The video decoding method and video decoding device according to Embodiment 2 will be described.

[0337] Figure 19 It is a block diagram showing a configuration example of a video decoding device based on the H.264 / MPEG-4 AVC or HEVC video coding standards.

[0338] like Figure 19 As shown, the moving image decoding device 200 includes an entropy decoding unit 290, an inverse quantization / inverse transformation unit 230, an addition unit 240, a deblocking filter processing unit 250, a sample adaptive offset processing unit 260, and an adaptive loop filter processing unit 255. , a frame memory 270 and a prediction unit 280 .

[0339] exist Figure 19 Among them, the entropy decoding unit 290 performs variable-length decoding processing on the input coded bit stream to decode information necessary for decoding such as a prediction mode and quantization coefficients.

[0340] The inverse quantization / inverse transformation unit 230 performs inve...

Embodiment approach 3

[0348] based on Figure 20 A video coding method and video coding device according to Embodiment 3 will be described.

[0349] Figure 20 It is a block diagram showing a configuration example of a video encoding device (hybrid video encoder) according to this embodiment.

[0350] like Figure 20 As shown in FIG. Adaptive loop filter processing unit 165 , sample adaptive offset processing unit 160 , prediction unit 180 and entropy coding unit 190 .

[0351] In this embodiment, the subtraction unit 105, the transformation unit 110, the quantization unit 120, the inverse quantization / inverse transformation unit 130, the addition unit 140, the adaptive loop filter processing unit 165, the sample adaptive offset processing unit 160, the prediction unit 180, and The structure of the entropy coding unit 190 is the same as that of the subtraction unit 105, the transformation unit 110, the quantization unit 120, the inverse quantization / inverse transformation unit 130, the addition...

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Abstract

An image processing method, wherein filtering of an image block is executed using a plurality of deblocking filters having different filtering strengths, comprises: a first parameter calculation step for calculating a first parameter (BS) that indicates boundary strength; a second parameter calculation step for calculating a second parameter (Tc) that indicates the limit value for the deblocking filters, on the basis of the first parameter (BS) and a quantization parameter (QP); and a selection step for selecting the deblocking filter to be used for the filtering from among the plurality of deblocking filters, using one or a plurality of threshold values determined on the basis of the second parameter (Tc).

Description

technical field [0001] The present invention relates to an image processing method and an image processing device for filtering an image using a deblocking filter. Background technique [0002] There are many standardized standards in the moving image coding process. Most of the currently standardized video coding processes use hybrid video coding processes. In the hybrid video coding process, generally, in order to obtain a desired compression gain (compression gain), reversible compression processing and irreversible compression processing are used in combination. Hybrid motion image coding is not only the basis of ISO / IEC standards (MPEG-X standards such as MPEG-1, MPEG-2, and MPEG-4), but also becomes the basis of ITU-T standards (H.26X standards such as H.261 and H.263). standard) basis. [0003] A video signal representing an image sequence composed of a series of frames is input to a video encoding device that performs a hybrid video encoding process. In the hybri...

Claims

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Application Information

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IPC IPC(8): H04N19/85H04N19/82
CPCH04N19/00896H04N19/00781H04N19/00909H04N19/86H04N19/139H04N19/159H04N19/176H04N19/117H04N19/82H04N19/61
Inventor M·纳罗施克T·韦丁
Owner SUN PATENT TRUST
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