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Coefficient acquisition device and method for deblocking filter, and image encoding/decoding device

A technology of deblocking filter and acquisition device, which is applied in the field of video coding and decoding, and can solve problems such as artifacts, sample distortion, and blur

Pending Publication Date: 2021-04-09
FUJITSU LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In video codecs, lossy image and video compression algorithms cause artifacts including blocking, blurring, ringing, and sample distortion
Current video compression algorithms are based on block-level compression, and since transformation and quantization are performed at the block level, it is easy to find that blocking occurs mostly on block boundaries

Method used

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  • Coefficient acquisition device and method for deblocking filter, and image encoding/decoding device
  • Coefficient acquisition device and method for deblocking filter, and image encoding/decoding device
  • Coefficient acquisition device and method for deblocking filter, and image encoding/decoding device

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Embodiment Construction

[0032] The foregoing and other features of the embodiments of the present application will become apparent from the following description, with reference to the accompanying drawings. In the description and drawings, specific embodiments of the present application are specifically disclosed, which indicate some embodiments in which the principles of the embodiments of the present application can be adopted. It should be understood that the present application is not limited to the described embodiments, on the contrary , The embodiments of the present application include all modifications, variations and equivalents falling within the scope of the appended claims.

[0033] In this embodiment of the application, the terms "first", "second", etc. are used to distinguish different elements from the title, but do not indicate the spatial arrangement or time order of these elements, and these elements should not be referred to by these terms restricted. The term "and / or" includes ...

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Abstract

The embodiment of the invention provides a coefficient obtaining device and method of a deblocking filter and an image encoding and decoding device. The coefficient acquisition method comprises the following steps: acquiring a plurality of input pixel values of a blocking effect existence position from a sample image reconstructed by a codec according to the type of a deblocking filter; calculating one or more output pixel values according to the plurality of input pixel values and the plurality of coefficients; taking one or more corresponding pixel values in the sample image as target values, and training the plurality of coefficients to obtain the coefficients of the deblocking filter. Therefore, the coefficient of the deblocking filter is more accurate; by using the deblocking filter which obtains coefficients through training, the blocking effect can be eliminated, and the coding gain can be improved.

Description

technical field [0001] The embodiment of the present application relates to the technical field of video coding and decoding. Background technique [0002] In video codecs, lossy image and video compression algorithms cause artifacts including blocking, blurring, ringing, and sample distortion. Current video compression algorithms are based on block-level compression, and since transformation and quantization are performed at the block level, it is easy to find that most of the blockage occurs on block boundaries. [0003] A de-blocking filter (also called a de-blocking filter) is a series of image processing filters that can eliminate blocking effects. In video compression software (such as VTM), a deblocking filter can be used to improve the image quality of an in-loop filter of a video codec. [0004] It should be noted that the above introduction to the technical background is only for the convenience of a clear and complete description of the technical solution of the...

Claims

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Application Information

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IPC IPC(8): H04N19/86H04N19/117H04N19/186H04N19/154
CPCH04N19/86H04N19/117H04N19/186H04N19/154
Inventor 徐陆航朱建清
Owner FUJITSU LTD