Method and device for encoding and decoding images using adaptive deblocking filtering

Through adaptive deblocking filtering technology, the computational complexity, encoding complexity and artifact problems in the prior art are solved in image encoding and decoding, and more efficient image processing and better subjective definition are achieved.

CN115134608BActive Publication Date: 2025-02-21DOLBY LABORATORIES LICENSING CORP
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Patent Information

Application Number
CN202210544344.3
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Priority Date
2015-06-11
Filing Date
2016-06-13
Publication Date
2025-02-21
Estimated Expiration
2036-06-13

AI Technical Summary

Technical Problem

In the existing image encoding and decoding technologies, inter prediction methods are complex in calculations, intra prediction methods are complex in encoding, and quantization processing leads to block artifacts and ringing phenomena in reconstructed pictures, and subjective definitions are degraded.

Method used

Adaptive deblocking filtering technology is adopted to generate reference picture lists through prediction units, perform inter prediction, inverse transformation to generate residual blocks, combine prediction blocks and residual blocks to generate reconstruction pictures, and perform loop filtering in the decoded picture buffer , determine whether to perform deblocking filtering based on the boundary intensity.

Benefits of technology

The performance and efficiency of the image processing system are improved, the block effect of intra prediction blocks and inter prediction blocks is reduced, the subjective definition of reconstructed pictures is improved, and the encoding efficiency is improved.

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Abstract

Disclosed is an image decoding device, comprising: a prediction unit, configured to generate a reference picture list for inter-frame prediction of a current picture, and perform inter-frame prediction of a current block based on the generated reference picture list; an inverse transform unit, configured to generate a residual block by inversely transforming inversely quantized transform coefficients of the current block; an adder, configured to generate a reconstructed picture based on the prediction block and the residual block generated by inter-frame prediction of the current block; and a decoded picture buffer unit, configured to store the reconstructed picture, wherein the current block is one of a plurality of blocks belonging to the current picture, wherein the reference picture list is configured based on whether the current picture is included in the reference picture list and a slice type, and wherein the decoded picture buffer unit comprises a first buffer and a second buffer.
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Citation Information

Patent Citations

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  • Features of intra block copy prediction mode for video and image coding and decoding

    WO2015054811A1